Academic literature on the topic '16MnCr5'
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Journal articles on the topic "16MnCr5"
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Stehr, Gunther, and Andres Gasser. "Laserstrahlerzeugte Randschichten auf 16MnCr5." Materials Testing 41, no. 7-8 (July 1, 1999): 308–12. http://dx.doi.org/10.1515/mt-1999-417-808.
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Bartels, Dominic, Tobias Novotny, Oliver Hentschel, Florian Huber, Ruslana Mys, Carsten Merklein, and Michael Schmidt. "In situ modification of case-hardening steel 16MnCr5 by C and WC addition by means of powder bed fusion with laser beam of metals (PBF-LB/M)." International Journal of Advanced Manufacturing Technology 120, no. 3-4 (February 14, 2022): 1729–45. http://dx.doi.org/10.1007/s00170-022-08848-3.
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AbstractTypical high-strength products are made from carbon-rich steels possessing relatively high carbon content, thus reducing weldability. In this work, preliminary studies on designing and tailoring a low-alloyed steel for the laser-based powder bed fusion (PBF-LB/M) process by adding carbon black (C) nanoparticles and tungsten carbide (WC) particles for enhancing the material properties are provided. First, the base material 16MnCr5 is modified with different concentrations of C and WC. It was found that an increased C and WC content resulted in an elevated material hardness in the as-built state. However, this comes at the cost of a poorer processability as pore formation increased for C-modified and crack tendency increased for WC-modified 16MnCr5. When applying a post-process quenching and optional tempering heat treatment, material hardness in the range of 615 HV can be achieved for C-enriched 16MnCr5 in the tempered state, which would be suitable for bearing and gearing applications. The addition of WC particles favored an improved wear resistance which is twice as high as the one of C-modified material for similar material hardness, showing the enormous potential of WC addition for reducing the wear rate. Complementary SEM and EDX analyses show that both the dilution and bonding zone of the WC particles are affected by the processing conditions and the WC concentration. Furthermore, it was found that a nearly defect-free fabrication of WC-enriched 16MnCr5 was possible for up to 2.5 wt.-% of WC, proving that the occurring defects are highly sensitive to the WC concentration.
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Tanabi, Hamed. "Evaluation of machinability of alloy ductile iron in term of thrust drilling force." Academic Perspective Procedia 3, no. 1 (October 25, 2020): 91–97. http://dx.doi.org/10.33793/acperpro.03.01.24.
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The main aim of this work is the assessment of the machinability of alloyed ductile iron before the austempering process. 16MnCr5 alloy steel and alloyed ductile specimens were subjected to drilling tests. The effect of drilling parameters on cutting force was investigated based on the Taguchi approach. Based on the results, a regression model was established to predict thrust force at various drilling conditions. The predicted thrust forces ratio was then used to evaluate the machinability of alloyed ductile respect to the 16MnCr5 alloy steel. The results showed that at lower feed rate, the normal drilling force is very close for both materials, such that the estimated machinability rating is 86%.
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Джалик, Аднан, Назим Уджар, and Нуры Еныай. "Исследование кинетики борирования и его влияния на структуру и механические свойства стали 16MnCr5." Металловедение и термическая обработка металлов, no. 1 (January 10, 2022): 62–67. http://dx.doi.org/10.30906/mitom.2022.1.62-67.
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Исследована кинетика борирования низколегированной стали 16MnCr5 при 1123, 1173 и 1223 К длительностью 2, 4 и 6 ч в порошкообразных смесях с использованием агента Экабор-II для определения возможности его применения для повышения поверхностных свойств этой стали. Проведен микроструктурный анализ методами световой и электронной микроскопии, а также рентгеновской дифракции. Определены механические свойства стали, борированной при разных режимах. Показано, что рост боридного слоя во времени описывается параболической зависимостью. Определены энергия активации диффузии при борировании и предэкспоненциальный множитель, получено эмпирическое уравнение для прогнозирования толщины боридного слоя на стали 16MnCr5 в зависимости от времени и температуры борирования. Установлено, что после борирования пределы текучести и прочности стали при растяжении увеличиваются, а пластичность уменьшается. После борирования в течение 6 ч при 1223 К твердость боридного слоя составила 1940 H V0,1 при твердости матрицы 401 HV 0,1 .
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Kapustova, Maria. "The Verification of Material Plastic Flow at Optimal Warm Forging Temperature Using Computer Simulation." Applied Mechanics and Materials 421 (September 2013): 229–34. http://dx.doi.org/10.4028/www.scientific.net/amm.421.229.
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Warm forging is most commonly used for production of die forgings which are manufactured by means of precise forging. As compared to cold forging, warm forging enables to reduce forging forces size considerably. Development of warm forging technology is connected to formability and plasticity research of forged material at warm temperatures. This contribution brings a methodology for optimal forging temperature determination from recommended interval of warm temperatures used for chromium-manganic steel 16MnCr5. The given steel is appropriate for case hardening and precise die forgings production. For the purpose of verification of steel forgeability at the recommended interval of warm forging temperatures 600, 650, 700 and 750 °C technological test of upsetting according to Zidek is used. The main factor of plasticity for optimal warm temperature selection from examined temperature interval is value of reduction of area that was determined by tensile test. Numeric simulation of forging process in closed die confirmed correct plastic flow of steel 16MnCr5 at recommended forging temperature 700 degrees of Celsius.
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Herter, Jasmin, and Rolf Ehrler. "Entwicklungsziel: Zerspanrekord." VDI-Z 161, no. 07-08 (2019): 40–41. http://dx.doi.org/10.37544/0042-1766-2019-07-08-40.
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Chiron und Gühring – Maschinenhersteller und Werkzeugspezialist – haben gemeinsame Entwicklungsziele und denselben Anspruch: herausragende Produkte zu liefern und die jeweilige Leistungsfähigkeit durch „Symbiose“ noch weiter nach oben zu schrauben. Gemeinsam wurde jetzt ein bahnbrechender Rekord aufgestellt: Zerspant wurden 1000 cm3 Stahl (16MnCr5) in 60 s, das bedeutet 8 kg Stahl in der Minute.
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SantAna, Péricles Lopes, Santos R. J., Bortoleto J. R. R., Cruz N. C., Rangel E. C., Santos L. V., and Silva T.F. "Study of a-C:H thin films deposited by Plasma Immersion Ion Implantation for mechanical and tribological applications." Nanoscale Reports 2, no. 3 (July 14, 2019): 24–32. http://dx.doi.org/10.26524/nr1933.
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The tribological and mechanical properties of DLC films deposited on the surface of 16MnCr5 steel alloy were investigated. The major concerning of using DLC layers on engine parts are: (i) to reduce friction; (ii) to increase fuel efficiency and to reduce CO2 emission; (iii) to increase hardness of alloy steel. After polished and ultrasonicated, 16MnCr5 substrates were submitted to PIIID procedures in radiofrequency plasmas (13.56 MHz) generated from atmospheres of methane and argon. Excitation power and total gas pressure were kept constant. It was investigated the effect of methane proportion on the microstructure and mechanical properties of the films using the follow techniques: Raman Spectroscopy (for Hydrogen content and microstructure analysis), Ultra Micro-Tribometer (for friction coefficient) and Nanoindentation (hardness evaluation). Raman analysis confirmed DLC character of the films produced, and the proportion of 80% methane and 20% argon resulted to the best performance of mechanical properties of the films owing to the increase of hardness in until ten times, and reducing the friction coefficient to about 0.2. In addition, thickness for these films varied from 165 nm to 206 nm.
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Arumparithy, G. L., R. Adalarasan, M. Santhanakumar, and Lijalem Mulugeta. "Parameter Design in Carbonitriding of EN36, 16MnCr5, and AISI 4140 Steels Using Principal Component-Based Grey Incidence (PGI)." Advances in Materials Science and Engineering 2022 (April 13, 2022): 1–12. http://dx.doi.org/10.1155/2022/8138198.
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Case-hardening steels (EN36, 16MnCr5, and AISI 4140) are used in applications demanding good surface properties such as precision gears, shafts, and cam rollers. This study explores the formation of microcoatings to improve the surface characteristics of these steels using carbonitriding, which combines the merits of carburizing and nitriding to offer surfaces with enhanced hardness and wear resistance. Taguchi’s L18 orthogonal array is used for conducting the carbonitriding trials with replications. The effects of various carbonitriding parameters like carbonitriding time, temperature, and flow rate of ammonia are studied on the treated surface characteristics (Vickers microhardness, diffusion depth, and wear loss). A novel integrated approach of principal component-based grey incidence (PGI) that combines the merits of both principal component analysis and grey incidence theory is effectively used to select the optimal carbonitriding inputs (material substrate AISI 4140, carbonitriding temperature −835°C, carbonitriding time-40 min, and flow rate of ammonia 0.4 lit/min). Microscopic images related to diffusion depths are also analyzed. This study offers the necessary guiding principles for obtaining the desired surface coating on EN36, 16MnCr5, and AISI 4140 steels.
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Kapustova, Maria, and Marek Zvončan. "The Research of Forgeability for Warm Temperatures Using Simulation." Advanced Materials Research 749 (August 2013): 18–22. http://dx.doi.org/10.4028/www.scientific.net/amr.749.18.
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At nowadays the interest of forging shops is focused on technology of accurate die warm forging. It is possible to reach higher exploitation of material, higher surface quality and higher accuracy of forgings in comparison to standard forging. The advance of warm forging relates to research of ductility and plasticity of forged material in warm temperature range. This paper provides the results of the research of 16MnCr5 steel forgeability in the interval of temperatures of warm forging. Steel alloy 16MnCr5 is proper for case hardening and for the production of precision die forging. In this paper the description of methodology for the proper interval setting of temperatures of warm forging for the given type of steel can be found. Practical test and a numerical simulation has proven the propriety of the examined steel for forging in the temperature interval 600, 650, 700 and 750 °C. For the steel forgeability verification in the recommended interval of warm forging temperatures, the technological test of upsetting according to Zidek was used.
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Tanabi, Hamed. "Machinability of alloy ductile iron and forged 16MnCr5 steel." Materials Testing 64, no. 3 (March 1, 2022): 455–62. http://dx.doi.org/10.1515/mt-2021-2027.
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Abstract The remarkable mechanical properties of austempered ductile iron (ADI) render ADI as an alternative material for forged steels. On the other hand, the high strength and hardness make the machining of ADI to be challenging. In this study, the ADI is presented as an alternative material to fabricate the ring gear of the two-wheel tractors. A series of experiments were designed to evaluate the machinability of the alloyed ductile iron before the austempering process. 16MnCr5 alloy steel and alloyed ductile specimens were subjected to drilling tests. The effect of drilling parameters on thrust force was investigated based on a design of experiments approach. A regression model was established to predict thrust force at various drilling conditions. Then, the machinability rating was defined as the ratio of the predicted thrust forces. The results showed that at lower feed rates, the thrust force is very close for both materials, such that the estimated machinability rating is 86%.
Dissertations / Theses on the topic "16MnCr5"
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Borsa, Maria Beatriz Nunes de Oliveira. "Avaliação do crescimento anormal de grão em um aço DIN 16MnCr5 forjado a morno." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/18989.
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Este trabalho tem por objetivo avaliar a influência da rota de processamento no surgimento de crescimento anormal de grão em anéis internos de juntas homocinéticas de aço DIN 16MnCr5 forjado a morno, assim como seu efeito na dispersão da dimensão entre-rolos do estriado deste anel. Para tanto foram realizados experimentos utilizando a rota de processamento corrente – forjamento, usinagem, cementação e têmpera – e uma rota de processo experimental – forjamento, cementação, usinagem e têmpera – além de adição de elementos de liga reconhecidos como ancoradores do crescimento de grão austenítico. Para calcular o tamanho de grão austenítico foi empregada a norma ASTM E112. A microestrutura das amostras foi determinada através de metalografia e a medição da dimensão entre-rolos do estriado foi realizada utilizando um dispositivo Frenco modelo IVM 3x2. A partir dos resultados obtidos foi possível determinar que a rota de processamento que possui as etapas de cementação não conjugadas é a mais adequada para que se obtenha um tamanho de grão fino e homogêneo, bem como uma dispersão de medidas do entre-rolos do estriado que minimize as perdas durante a manufatura de peças.The aim of the work is to analyze the influence of process route on the appearance of abnormal grain growth in DIN 16MnCr5 warm forged constant velocity joints inner races as well as its effect on the dispersion of spline dimension between pins measurements. In order to do this, experiments using current process flow – forging, machining, case carburizing and quenching – and an experimental process route – forging, case carburizing, machining and quenching – were carried out. Further more, alloying elements well known for its ability to control austenitic grain growth were added. The standard applied in order to calculate the austenitic grain size was ASTM E112. The microstructure of the samples was determined through metallographic analysis and spline’s between pins dimension was measured using a Frenco gage model IVM 3x2. From the obtained results it was possible to determine that the process route which has case carburizing and quenching stages not conjugated is more adequated to obtain a fine and homogeneous austenitic grain size distribution as well as a dispersion of between pins dimensions that minimizes the wastes during parts manufacturing.
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Chacko, Vivek. "Design and dynamic simulation of mobile manipulators incorporating tribological analysis of 16MnCr5 and EN19 steels." Thesis, Bournemouth University, 2018. http://eprints.bournemouth.ac.uk/31209/.
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Search and Rescue (SAR) robotics is a growing research area in spite of which reports show that heavy equipment like excavators are still used in SAR operations despite their unsuitability. Literature reveals the need for new designs for application-specific manipulators in time-critical SAR operations. To this end, the Computer Aided Design (CAD)-Multibody dynamics (MBD) simulation technique was applied instead of traditional numerical modelling and roofs-of-concept for two types for manipulators, i.e. anthropoid and complex closed-loop manipulators are presented. The combined friction model (CFM) was incorporated into this simulation considering the importance of friction as a tribological component affecting the dynamic performance of such mobile manipulators. To surmount the limitations of friction models, scaled-down tribological experiments were conducted to determine the coefficient of friction (COF) for two contact geometries - sliding cylinder and sliding pin, selected as approximations of manipulator joint contact. Oil lubricant was used to generate reference COF characteristics against which COF of grease-lubricated contacts were compared, and oil-lubrication showed better COF than grease-lubrication. However, oil is a fluid and it cannot be used in the application environment. Subsequently, the effect of nickel alumina nanocomposite coating on COF deposited on 16MnCr5 specimens using pulse electrodeposition (PED) was analysed. The results showed that this coating only reduced the COF by 3.1% compared to uncoated specimens in sliding cylindrical contacts, while in the case of sliding pin contacts the coating proved to be detrimental with a 22.1% increase in COF. The values of COF were used in a linear model for computing joint torque. Results of surface characterisation carried out using white light interferometry, digital microscopy and scanning electron microscopy substantiate the COF measurements. Microhardness of the surface was also analysed and showed that coatings improved the surface hardness by 19.7% to 55.9%. Therefore, this work contributes to the SAR robotics through design and simulation, and tribology.
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Foppa, Cristiano. "Estudo da influência de diferentes estados superficiais na resistência ao torque e vida de acoplamentos mecânicos fabricados com aços DIN 16MnCr5 e SAE 10B22M." Florianópolis, SC, 2009. http://repositorio.ufsc.br/xmlui/handle/123456789/92822.
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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Ciência e Engenharia de Materiais, Florianópolis, 2009.Made available in DSpace on 2012-10-24T12:44:15Z (GMT). No. of bitstreams: 0
Este trabalho teve por objetivo identificar os limites mínimos de microdureza que permitem atender aos requisitos de resistência ao torque (25 kgf.m) e vida em serviço (40.000 ciclos) de acoplamentos mecânicos utilizados em motores de partida, produzidos com os aços DIN 16MnCr5 e SAE 10B22M, utilizando-se para cada aço amostras de dois lotes (corridas) de fabricação diferentes. Os perfis de microdureza foram obtidos através dos processos de: a) cementação, têmpera e revenimento; b) têmpera e revenimento; c) nitretação; d) utilizando-se a peça no estado conformado e usinado. As variações no processo objetivaram ampliar as diferenças entre os perfis de microdureza, de modo a melhor correlacioná-las com os requisitos de torque e vida em serviço. Os resultados mostram que diferentes lotes de fabricação (corridas) para o mesmo tipo de aço não influenciam nos resultados de torque e vida em serviço. Todos os tipos de tratamento, inclusive as peças apenas no estado conformado, resultam em resistência a torção acima do valor mínimo especificado (25kgf.m), porém os aços com camada cementada apresentam menor deformação superficial. A maior deformação nas peças sem tratamento térmico e nitretadas resulta em perda de função do produto. Ambos os aços quando cementados, temperados e revenidos superam o número de ciclos especificado (40.000 partidas). O aço SAE 10B22M, somente no estado temperado, supera as 40.000 partidas, finalizando os testes em ótimas condições de uso. O aço DIN 16MnCr5 somente no estado temperado e revenido e os dois tipos de aço somente nitretado e sem tratamento térmico não atingem o número de ciclos especificado.
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Caliari, Daniele. "Development and optimization of surface hardening treatments and anodizing processes." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3422679.
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The optimization of metallic solid surfaces is one of the greatest industrial challenges about surface engineering. Surface hardening treatments are applied to improve the wear resistance of parts without affecting the more tough and soft core of the treated substrates.
This doctoral work is focused on the study of gaseous multistage oxynitrocarburizing treatments for low carbon steels and hard-anodizing processes applied on aluminum HPDC components. There is still a lack of knowledge both in literature and in industry about these treatments. The aim of this work is to investigate the microstructural evolution during gaseous multistage oxynitrocarburizing treatments and the impact of the substrate’s characteristics on the hard-anodic layer, respectively. It is important to understand the impact of the process parameters and the substrate’s microstructure on the respective resulting layers; in this way, it is possible to improve the scientific knowledge and therefore to understand the basics for following replications in an industrial context. A wide-ranging view of the whole thermochemical and hard-anodizing processes has been provided by a review of the literature and several treatments replicated in an industrial plant.L’ottimizzazione delle performance di superfici metalliche è una delle sfide industriali più avvincenti nell’ambito dell’ingegneria delle superfici. I trattamenti di indurimento superficiale sono quei processi sviluppati per incrementare la durezza e resistenza a usura superficiali di componenti senza però peggiorare la tenacità che presentano a cuore. Questo lavoro di dottorato è focalizzato sullo studio sia di trattamenti multistadio di ossinitrocarburazione applicati a substrati in acciaio basso legato, sia di trattamenti di anodizzazione dura applicati a componenti pressocolati in lega di alluminio. Attualmente vi sono ancora importanti lacune riguardo queste specifiche tipologie di trattamenti, sia in letteratura che nel mondo industriale. L’obiettivo di questo lavoro è approfondire sia l’evoluzione microstrutturale durante un trattamento multistadio di ossinitrocarburazione applicato a un substrato ferroso, sia come le caratteristiche microstrutturali di un substrato in lega di alluminio impattano sul film di ossido anodico duro. L’obiettivo finale è quello di ampliare il sapere scientifico e, quindi, gettare le basi per poter poi replicare con successo su scala industriale quanto studiato in laboratorio. Un’accurata revisione della letteratura e una serie di trattamenti replicati in impianti industriali ha portato a una visione ad ampio spettro su questi trattamenti termochimici e di ossidazione anodica dura.
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YAHYA, OULD MOHAMED LEMINE. "Approche locale de la rupture fragile intergranulaire de l'acier 16mnd5." Paris, ENMP, 1997. http://www.theses.fr/1997ENMP0783.
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L'acier de cuve des centrales nucleaires a eau sous pression peut etre sensible a la fragilite intergranulaire. Celle-ci est liee a la segregation d'impuretes aux joints de grains. Elle provoque un changement du mode de rupture fragile qui, du clivage transgranulaire, devient intergranulaire. Elle se manifeste egalement par l'elevation de la temperature de transition et la baisse de la tenacite. De plus, en traction, les deformations et les contraintes a rupture sont fortement dispersees et faibles comparees aux valeurs correspondant au clivage. Il est donc necessaire de caracteriser la rupture fragile intergranulaire par un outil permettant la prevision des valeurs de tenacite. Dans le cas du clivage, la dispersion des contraintes a rupture et des valeurs de tenacite est bien decrite par le modele de beremin (1982). L'application de ce critere a la rupture fragile intergranulaire (r. F. I. ) met en evidence une bimodalite associant un faible module de weibull aux eprouvettes rompues en debut de plasticite. Apres une analyse des mecanismes de la fragilite intergranulaire, nous etudions les hypotheses susceptibles d'expliquer cette bimodalite dans le but de proposer un critere de rupture adapte a la r. F. I. De l'acier 16mnd5. Nous evaluons les heterogeneites de contrainte et de deformation plastique a l'echelle des grains par un modele polycristallin. Nous determinons l'evolution des heterogeneites en fonction du chargement pour mettre en evidence le role de celles-ci dans la bimodalite experimentale caracteristique de la r. F. I. Des techniques experimentales (technique des microgrilles, etc) sont ensuite mises en oeuvre pour valider les resultats relatifs a l'evolution de l'heterogeneite de la deformation plastique. L'observation systematique des facies de rupture permet d'identifier les defauts a l'origine des ruptures prematurees. Nous proposons un modele statistique de rupture tenant compte des caracteres specifiques de la r. F. I. Tels que l'amorcage de la rupture dans le domaine elastique et l'existence d'une double population de defauts. Nous rappelons les modeles decrivant l'effet d'echelle en rupture fragile et nous proposons une demarche simple qui permet d'acceder a la loi d'echelle donnee par le modele.
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Henon-Vernet, Christine. "Contribution à l'étude métallurgique d'une liaison bimétallique soudée 16MND5/309/308." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0021.
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Les liaisons bimetalliques soudees concernees par cette etude interessent les assemblages par soudage des tubulures de cuve en acier faiblement allie 16mnd5 et des tuyauteries en acier austenitique 316 du circuit rep. Certaines de ces liaisons presentent en peau externe des defauts intergranulaires en premiere couche de beurrage qui n'apparaissent que lorsque la structure de cette premiere couche est purement austenitique. Les materiaux assembles ayant des coefficients de dilatation tres differents, nous avons suppose que la fatigue thermique pouvait etre responsable de la presence de ces defauts. Aussi, afin de tester cette hypothese et estimer le degre de nocivite de la structure austenitique, nous avons etudie une liaison bimetallique presentant une structure austenitique en premiere couche et avons simule la fatigue thermique par de la fatigue oligocyclique a 320c. Nous nous sommes attaches a decrire les transformations metallurgiques induites par le caractere heterogene de l'assemblage. De nombreuses discontinuites ont ainsi pu etre mises en evidence au niveau de l'interface metal de base/premiere couche de beurrage : discontinuites chimiques, microstructurales et cristallographiques. Une analyse des conditions de solidification imposees par le caractere heterogene de la liaison a ete proposee permettant de rendre compte des phenomenes observes. D'un point de vue mecanique, il semble que ces heterogeneites aient peu d'influence sur la tenue en fatigue de la liaison. Quel que soit le mode de sollicitation envisage, nous ne recreons pas les decohesions intergranulaires observees sur site. Une modelisation par elements finis a ete menee pour determiner la repartition de la deformation plastique cumulee et expliquer la presence d'une zone sans bandes de glissements apparentes au niveau de l'interface, cote beurrage.
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Sekfali, Seddik. "Influence de la microstructure sur le comportement local dans les aciers 16MND5." Phd thesis, Ecole Centrale Paris, 2004. http://tel.archives-ouvertes.fr/tel-00419622.
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L'acier 16MND5 ou A508 Cl3 est utilisé pour la fabrication par forgeage des cuves de réacteurs nucléaires à eau sous pression. Ce matériau présente un bon compromis en terme de ténacité et de limite d'élasticité, sa microstructure est principalement bainitique revenue. Du fait de la variation locale de la composition chimique et du procédé d'élaboration, ce matériau présente des hétérogénéités microstructurales qui peuvent modifier localement les propriétés du point de vue de l'endommagement. En particulier, certaines zones présentent une microstructure martensitique dont les propriétés à la rupture sont différentes de celles de la bainite.
Le but de cette thèse est d'apporter quelques éclaircissements sur l'influence de la microstructure ; plus particulièrement, la taille des entités cristallographiques et leur distribution spatiale sur le comportement local de l'acier 16MND5.
Deux microstructures ont été élaborées à cet effet ; une microstructure bainitique revenue et une microstructure martensitique revenue. Une caractérisation expérimentale a été réalisée sur les deux microstructures afin de déterminer la morphologie, la distribution spatiale des orientations cristallographiques et le comportement en traction.
Un dépôt de grille a été effectué sur des éprouvettes de traction plates pour permettre de déterminer le champ déformation expérimental sur une zone préalablement analysée en EBSD.
La détermination du comportement en traction a permis l'identification à l'aide d'une méthode inverse d'une loi de comportement multicristalline faisant intervenir la densité de dislocation sur chaque système de glissement. Cette loi de comportement a été utilisée dans des simulations à l'aide de la méthode des éléments finis pour simuler le comportement des deux microstructures en traction et comparer aux champs de déformations expérimentaux de celles-ci. Il en résulte une bonne adéquation entre les simulations et les expériences et la mise en évidence de l'influence de l'orientation des grains voisins sur le comportement local.
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Chen, Qianqian. "Modélisation de la fissure à froid dans un acier ferritique de type 16MND5." Palaiseau, École nationale supérieure de techniques avancées, 2015. http://www.theses.fr/2015ESTA0010.
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L’objectif de cette thèse est l’étude du phénomène de fissuration à froid qui se produit dans la zone affectée thermiquement (ZAT) lors de l’opération du soudage. Il s’agit plus précisément de développer un critère pour prédire ce phénomène. Il est bien établi que la fissuration à froid se produit sous l’effet combiné de trois facteurs : i) une microstructure dure et fragile qui est ici la martensite ; ii) une teneur en hydrogène suffisamment élevée ; et iii) une contrainte critique. Pour ce faire, nous avons tout d’abord réalisé des essais de traction sous hydrogène sur des éprouvettes martensitiques afin d’étudier la fragilisation de la martensite par l’hydrogène. Ensuite, et sur la base des résultats expérimentaux, un modèle d’endommagement ductile-fragile est proposé. Ce modèle a permis d’établir le critère de fissuration à froid recherché. Pour valider ce critère, nous avons réalisé des essais de type Tekken. L’avantage de cet essai est qu’il permet de contrôler les paramètres du soudage pour provoquer la fissuration à froid. Enfin, cet essai a été reproduit à l’aide d’une modélisation thermo-métallo-mécanique-diffusion. Ainsi, la teneur en hydrogène dans la ZAT, la proportion de martensite et les contraintes résiduelles ont été calculées. L’application de notre critère montre une bonne corrélation entre la modélisation et l’essai. La fissuration à froid est bien préditeThis thesis is aimed at studying the hydrogen induced cold cracking (HICC) in the heated affected zone (HAZ) of weldments and at proposing a criterion to predict this phenomenon. HICC is attributable to three factors: i) a susceptible microstructure; ii) hydrogen concentration; and iii) a critical stress. To this end, first tensile tests on smooth specimens charged with hydrogen were performed to investigate hydrogen embrittlement of martensite. According to these results, a ductile-brittle damage model is proposed in order to establish a HICC criterion. In order to validate this criterion, we performed the modified Tekken tests. The Tekken test was chosen because one can control the welding parameters in order to induce cold cracking. The modified Tekken tests have then been modeled using a fully coupled thermo-metallo-mechanical-diffusion model using the finite element method. This model allows to compute martensite’s portion, residual stress level and hydrogen concentration in the HAZ. By applying the HICC criterion to these tests, cold cracking phenomenon has been correctly predicted
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Vincent, Yannick. "Simulation numérique des conséquences métallurgiques et mécaniques induites par une opération de soudage : acier 16MND5." Lyon, INSA, 2002. http://www.theses.fr/2002ISAL0024.
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Ce travail concerne la modélisation des phénomènes thermique, métallurgique et mécanique que l'on rencontre dans la zone affectée thermiquement. Il porte plus particulièrement sur l'analyse, le développement et la validation de modèles de comportement mécanique qui prennent en compte les changements de phase à l'état solide. Les études sont pratiquées sur un acier faiblement allié en carbone manganèse de type 16MND5. Cet acier est utilisé pour la fabrication des cuves de réacteur nucléaire à eau préssurisée. Ces travaux constituent une étape, dont la finalité est la prévision des contraintes résiduelles induites par une opération de soudage. Les analyses expérimentales sont conduites sur des exemples analytiques de difficultés croissantes allant d'un comportement majoritairement uni-axial jusqu'à un comportement cyclique tridimensionnel. Des simulations numériques conformes aux essais réalisés, sont pratiquées avec le logiciel SYSWELD (E. S. I. ). Les analyses comparatives apportent alors un jugement global, sur l'aptitude du code de calcul utilisé, à décrire le comportement structural dans les cas particuliers considérés. Cette étude permet de tester les modèles couplés thermo-métallurgiques et thermo-mécaniques, d'apprécier les effets d'hypothèses d'identification des lois de comportement, de déterminer l'influence des différents phénomènes à prendre en compte tels que : la plasticité de transformation, la plasticité classique polyphasée, la restauration d'écrouissage. . . Un des points importants issus des précédentes analyses montre que les phénomènes liés à la viscosité ne peuvent être négligés à haute température. Aussi nous visons, dans la dernière partie de cette thèse, l'établissement d'une loi de comportement élasto-viscoplastique qui tient compte des transformations structurales à l'état solide. Pour satisfaire cet objectif, nous nous appuyons sur les développements déjà réalisés en plasticité par J. B. Leblond. Cette modélisation envisage un passage du mesoscopique au macroscopique, en déterminant le comportement macroscopique à partir d'une déscription des mécanismes élémentaires de déformation et de leur intégration dans un traitement de changement d'échelle. Une première validation est conduite sur la base d'essais unidimensionnels de type "Satoh"This work carries on the modeling of thermal metallurgical and mechanical phenomena which take place in the heat affected zone during welding. It relates more especially to the analysis the development and the validation of behaviour models incorporating the phase transformation in solid state. Studies are performed on carbon manganese steel (16MND5 in AFNOR norm). The experimental analyses are performed on analytical examples, of increasing difficulties going from a uniaxial behaviour until a three-dimensional cyclic one. The numerical simulations, in conformity with the test carried out, are performed with the SYSWELD® (E. S. I) software. The comparative analyses provide a global agreement on the ability of numerical codes used to describe the structural behaviour in the par1icular cases considered. This study allow to test the thermo-rnetallurgical and thermo-mechanical models, to determine the influence of the various phenomena to take into account such as : the TIP (plasticity induced transformation), the possible recovery of strain hardening of the mother phase and the classical elastoplastic behaviour of mixtures of two different phases. . . One of the significant points resulting from the preceding analyses shows that the phenomena related to the viscosity cannot be neglected at high temperature. Therefore in the last part of this thesis, we present a generalization of the Leblond model for the plastic behavior of steels during phase transformations taking viscoplastic effects into account. The model presented rests on a micromechanical approach. This generalization is obtained by considering the yield stress of the phases as a function of the viscoplastic strain rate. The model presented has been implemented in the finite element software SYSWELD®. The numerical formulation has been achieved in such a way that plastic as well as viscoplastic phases can be considered. The first validations proposed are performed on the basis of unidimensional tests of type “Satoh”
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Diawara, Bandiougou. "Caractérisation quantitative de la microstructure de l'acier 16MND5 des cuves de réacteurs nucléaires à eau pressurisée." Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENI063.
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Ce travail de thèse concerne l’acier 16MND5 des cuves des Réacteurs à Eau Préssurisée (REP).L’étude vise à caractériser de manière quantitative la microstructure et à comprendre l’effet desparamètres influents (vitesse de refroidissement, température de revenu …) sur sa formation. D’unpoint de vue expérimental, l’étude est menée grâce à l’utilisation des techniques d’observationcomme la métallographie, le MET, MEB et l’EBSD, et la réalisation de traitements thermiquescontrôlés (dilatométrie notamment).Ces observations visent à identifier les différents constituants de l’acier et de déterminer lesgrandeurs quantitatives les caractériser (tailles, fractions volumiques des différentes phases ainsique leurs orientations cristallographiques).Nous avons dans un premier temps caractérisé de manière complète et quantitative, lamicrostructure de l’acier 16MND5 à l’état de réception (trempé et revenu). L’étude a permis demontrer qu’il existe un gradient de microstructure entre la peau interne et le coeur de l’épaisseur dela virole. La microstructure à coeur est constituée de ferrite proeutectoïde, de bainite et d’amas decarbures, tandis qu’en peau interne on est en présence de bainite et d’amas de carbures.Une campagne d’essais de dilatométrie a été réalisée afin de simuler la microstructure brute detrempe de l’acier 16MND5 et d’observer l’effet de la vitesse de refroidissement, des températuresde transformation sur la microstructure des aciers de cuve. Ces essais ont révélé que lamicrostructure de l’acier 16MND5 après refroidissement est constituée de bainite, d’îlots demartensite et d’austénite résiduelle (M-A) enrichie en carbone. Ce sont ces îlots M-A qui donnentnaissance aux amas de carbures lors du revenu final.L’effet de la composition chimique de cet acier a été étudié grâce à l’utilisation d’une tôle ayant unecomposition chimique plus riche en carbone et en éléments d’alliages. Ce travail a montré quel’augmentation des teneurs en carbone et en éléments d’alliages modifiaient la morphologie et lacristallographie de la ferrite.L’étude des comportements mécaniques des constituants présents en peau interne, quart épaisseur etmi épaisseur a été réalisée grâce à des essais de résilience sur des éprouvettes de mini charpy. Cetteétude a permis de montrer qu’à basse température (-120°C) la peau interne présente de meilleurespropriétés de résilience que le quart et la mi épaisseur de la virole. Des examens de la surfacelatérale des éprouvettes de Charpy ont montré que la présence de ferrite proeutectoïde favorise lagermination de micro-fissures de clivageReactor pressure vessel is the second security barrier of the nuclear reactor and it is elaboratedwith a low carbon steel ( C-0.16%). Due to the large size of the ferrule there is temperatureand cooling rate gradient, which lead to microstructure gradient. To develop predictive modelit is necessary to well describe the microstructure which depend to the processing parameters.We focuse our work in investigating the effect of the processing parameters (cooling rate,chemical composition...) on the final microstructure during phase transformation.To get these informations and better describe the microstructure, we have used someexperimental technics like SEM, EBSD, TEM and Optical Microscopy. The steel used is alow carbon steel with a composition of C-0.16%, Mn-1.32%, Ni-0.72%, Mo-0.49%, Si-0.23%, Cr-0.23%, P-0.010%, S-0.004%. The material has been tempered in the range 635°C-660°C after cooling. Three positions have been chosen for examinations, because the coolingrate is not the same between the center and the edge of the material. The results of theobservations made in the different scale, indicate that the microstructure is mainly baniticwith bainitic ferrite and cementite precipitates. Examinations of the precipitates withextractive replicas in TEM reveal that morphology of cementite particles is complex they arecylinder-shaped particles, short bars particles and skeletal particles. OrientationsRelationships (OR) have been determined between ferrite and cementite particles with thinfoils in TEM by using Selected Area Diffraction, in a large number areas the Isaichev andBagaryatskii OR have been observed, a little Pitsch Petch OR have been obtained. The EBSDmap shows that the bainitic ferrite morphologies are both lath like and polygon. Themisorientations inside the laths are very small (0.5° misorientation point to point) andbetween laths we have the range 49-60° misorientation. The profile of misorientationsbetween point to point indicates higher frequency for the range 49-60°. Charpy test have beenperformed to analyze the effect of the microstructure on the fracture energy at lowtemperature. The results show that the fracture energy decreases when the content ofproeutectoid ferrite is high
Book chapters on the topic "16MnCr5"
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Spittel, M., and T. Spittel. "Steel symbol/number: 16MnCr5/1.7131." In Metal Forming Data of Ferrous Alloys - deformation behaviour, 1026–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-44760-3_162.
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Bošanský, Miroslav, František Tóth, Ladislav Gulan, Juraj Rusnák, and Adam Furstenzeller. "Scuffing Resistance of 16MnCr5 HCR TiAlCN-Coated Gears." In Current Methods of Construction Design, 445–52. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-33146-7_51.
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Zuperl, Uros, and Franc Cus. "Combined Intelligent and Adaptive Optimization in End Milling of Multi-layered 16MnCr5/316L." In Advanced Engineering Optimization Through Intelligent Techniques, 1–11. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8196-6_1.
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Schweinshaupt, F., I. F. Weiser, T. Herrig, and T. Bergs. "Investigation of Combined Flat Coining and Fine Blanking of 16MnCr5 to Influence the Die Roll Formation." In Lecture Notes in Production Engineering, 112–21. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78424-9_13.
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Winkler, Karl Jakob, Matthias Schmitt, Thomas Tobie, Georg Schlick, Karsten Stahl, and Rüdiger Daub. "Characterization and Influences of the Load Carrying Capacity of Lightweight Hub Designs of 3D-Printed Gears (16MnCr5, PBF-LB/M-Process)." In Proceedings of the Munich Symposium on Lightweight Design 2021, 160–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-65216-9_15.
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Liu, Hui, Yikui Xie, Qiankun Yang, Qi Zhou, and Jie Ma. "Modification of Inclusions by Adding Mg to 16MnCrS5 Gear Steel." In 11th International Symposium on High-Temperature Metallurgical Processing, 595–604. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36540-0_53.
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Moehring, Kerstin, and Frank Walther. "Forming Stress-Induced Initial Damage in Case Hardening Steel 16MnCrS5 Under Cyclic Axial Loading in LCF Regime." In Structural Integrity, 267–73. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-97822-8_31.
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Zhang, Pengju, Wenqian Bai, Yu Wu, and Jingqing Chen. "Influence and Mechanism of Welding Residual Stress of 16MnR with Machine Learning." In The 2021 International Conference on Machine Learning and Big Data Analytics for IoT Security and Privacy, 211–20. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-89508-2_27.
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Lu, Zhiming, Bing Bing Chen, Zeng Liang Gao, and De Ming Fang. "Stress Corrosion Crack Tests of 16MnR Low Alloy Steel in Anhydrous Ammonia Environment." In Key Engineering Materials, 974–79. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-978-4.974.
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Mathieu, Jean Philippe, Denis Bouscaud, Karim Inal, Sophie Berveiller, and Olivier Diard. "Plastic Heterogeneities Characterisation in 16MND5 RPV Steel by X-Ray Diffraction, Comparison with Finite-Element Approach." In Materials Science Forum, 523–28. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-414-6.523.
Full textConference papers on the topic "16MnCr5"
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Gavrus, A., D. Pintilie, and R. Nedelcu. "Numerical analysis of rheological and tribological behavior influence on 16MnCr5 forging fibering." In ESAFORM 2016: Proceedings of the 19th International ESAFORM Conference on Material Forming. Author(s), 2016. http://dx.doi.org/10.1063/1.4963524.
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Vieira, Alexandre, Ricardo Samad, NIlson Vieira, and Wagner de Rossi. "Redução do atrito por meio da texturização a laser com pulsos ultracurtos do aço DIN 16MnCr5." In X Congresso Nacional de Engenharia Mecânica. ABCM, 2018. http://dx.doi.org/10.26678/abcm.conem2018.con18-0513.
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Gaudin, C., P. Jacquot, P. Prince, D. Rivolet, and J. P. Duhamel. "Vacuum Heat Treatment and Low Pressure Carburizing of APS NICR Coatings." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p1387.
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Abstract Duplex processes consist in applying a treatment, like annealing, carburizing, or nitriding for example, to a plasma sprayed coating in order to improve particular physical characteristics of this coating. Trials of vacuum heat treatment or low pressure carburizing have been performed on APS NiCr coatings, previously sprayed on a steel type 16MnCr5. As a result, densification and adherence of the coating on the substrate have been significantly increased. To a lesser extent, the coating hardness has also gone up. The diffusion of chemical elements have been highlighted by X-Ray analysis, showing the creation of a physicochemical bonding at the interface zone.
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BEHRENS, Bernd-Arno, Wolfram VOLK, Alexander CHUGREEV, Michael TILL, Daniel MAIER, and Christoph BÜDENBENDER. "Numerical investigation of thermal and mechanical deviations in a hot forging process of 16MnCr5 and 42CrMo4 steel." In METAL 2019. TANGER Ltd., 2019. http://dx.doi.org/10.37904/metal.2019.693.
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Köhler, A., D. Adam, P. Männel, and G. Stehr. "Untersuchungen zum Mineralgleitverschleiß von thermisch gespritzten Hartstoffschichten (Survey of Sliding Wear of Thermally Sprayed Hard-Coatings with Minerals)." In ITSC 1999, edited by E. Lugscheider and P. A. Kammer. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 1999. http://dx.doi.org/10.31399/asm.cp.itsc1999p0147.
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Abstract A promising technique to increase the portions of hard metal and hence the wear resistance of components is the coating with more wear-resistant hard metals by thermal spraying. The development of suitable coatings includes the selection of substrates, preliminary treatment of substrates, selection of powders, spraying techniques, spraying parameters, coating and quality characterisation. Examined were variants of high velocity oxy-fuel flame spraying CDS (Continuous-Detonatio-Spraying), DJH (Diamond-Jet-Hybrid 2700) and the wear resistance with 3-body-wear. The results confirm that substrates coated by DJH hard metal (e.g. with WC 86 Co10 Cr4) in comparisation with uncoated substrates (16MnCr5, case-hardened, hardness 65 HRC) have a specific wear by 3-body-wear-test which is many times lower then without coating. Paper text in German.
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Okman, O., M. O¨zmen, H. Huwiler, and A. E. Tekkaya. "Effects of Local Heating on Material Flow in Free Forming Process." In ASME 2006 International Manufacturing Science and Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/msec2006-21025.
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A novel manufacturing method is investigated, in which a proper temperature gradient is created within workpiece in order to control local material flow during free forming. The main motivation is to produce complicated shapes by reducing the flow stress on the regions, where local deformation is desired to take place. A sufficient control of temperature within the material results in the required product shape even in the absence of complicated dies. Besides the lower tooling costs the process provides, the heat energy applied to the workpiece is less than that in conventional hot forming processes, which is currently a strong alternative for manufacturing of such products. In the study, heating is realized by means of induction heating and laser beam scanning. The process is investigated experimentally on circular cylinder specimens made of different materials, namely Ti6Al4V, X5CrNi18/9 and 16MnCr5. The effect of process parameters on the mode of deformation is analyzed by finite element method (FEM). The thermo-mechanical analysis of induction heating is supported by electromagnetic calculations. The two alternative heating methods are compared. Affects of heating on multiple locations is investigated for induction heating applications. A brief overview of the process is presented and conclusions are drawn on the effectiveness, limitations, failure modes and applicability of the process.
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Jiang, Yanyao, Tianwen Zhao, Xiaogui Wang, and Zengliang Gao. "Multiaxial Fatigue of 16MnR Steel." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93473.
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Uniaxial, torsion, and axial-torsion fatigue experiments were conducted on a pressure vessel steel, 16MnR, at room temperature. The uniaxial experiments were conducted using solid cylindrical specimens. Axial-torsion experiments employed thin-walled tubular specimens subjected to proportional and nonproportional loading. A critical plane multiaxial fatigue criterion recently developed was found to correlate well with all the experiments conducted for the material. In addition, the fatigue criterion correctly predicted the cracking behavior of the material subjected to different loading paths.
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Qiu, Baoxiang, Zengliang Gao, Xiaogui Wang, and Yanyao Jiang. "Prediction of Fatigue Initiation Life of 16MnR Notched Components." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26779.
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Fatigue initiation life of smooth and notched rod 16MnR specimens subjected to fully reversed uniaxial tension-compression and pure torsion cyclic loading was studied by a multiaxial fatigue damage criterion. A robust cyclic plasticity model was implemented into ABAQUS via a user-material subroutine UMAT. In virtue of the axisymmetry of geometry and loading, an axisymmetric model was facilitated to get the cyclic elasto-plastic stress-strain relationship. The accumulated fatigue damage of each material point in different material plane was then obtained by Jiang’s fatigue damage criterion. From the results of fatigue damage analysis we know that the maximum stabilized damage per loading cycle was at the root of the notch, where the material point firstly reaches the critical damage value. Fatigue crack initiation life is defined as the ratio of the critical damage to the maximum fatigue damage per loading cycle. Uniaxial and pure torsion fatigue experiments for the smooth rod specimens, sharp and blunt notched rod specimens were also conducted. Good agreement was achieved by comparing the predicted fatigue initiation life with the experiment results.
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Tang, Jian Qun, and Jian Ming Gong. "Studies on Hydrogen Permeation of Weldments for Two Low-Alloyed Steels With Different Microstructures." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57419.
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16MnR and SPV50Q low-alloyed steels, which have ferrite-pearlite and tempered martensite microstructures, respectively, are widely used to fabricate storage tanks for liquefied petroleum gas. However, during the process of operation, some cracks often occur on tanks made by these steels due to the presence of hydrogen, especially on weldments. The occurrence of this cracking is closely related to the diffusion and permeation of hydrogen in the steels. In order to explore the effect of different microstructures on hydrogen permeation and compare the hydrogen permeability of these two weldments, measurements were conducted on various metals (base metal-BM, heat-affected zone-HAZ, and welded metal-WM) cut from 16MnR and SPV50Q weldments by using electrochemical permeation tests. The results show that the microstructure has an important effect on hydrogen permeability. For 16MnR steel weldment, the diffusion coefficient of BM is the minimum due to the presence of the strong hydrogen traps in the interface between banded pearlite and matrix as well as the interface between inclusion and matrix. The microstructure of WM provides great grain boundary area as a hydrogen diffusion path and makes hydrogen easily diffuse, which results in the maximum permeation rate and diffusion coefficient. The fine-grained microstructure of normalized zone in HAZ acts as barriers for the hydrogen diffusion, which makes the permeation rate and diffusion coefficient of HAZ located between those of BM and WM. Similarly, for SPV50Q weldment, the permeation rate and diffusion coefficient increase in the order of BM, HAZ and WM. Those of BM are the minimum, which is correlated with the strong hydrogen trap due to the large quantities of dislocation within the lath martensite. Those of WM are the maximum for its strongly hydrogen diffusion path like WM of 16MnR weldment. As comparing the hydrogen permeability of 16MnR and SPV50Q weldment, the corresponding metals of the former always have greater permeation rate and diffusion coefficient than those of the latter, which is also due to its intrinsic microstructures.
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Yuan, Biao, Ying Zhi Wang, Xin Ma, Shan-Tung Tu, Yan-An Xi, and Zhi Xiang Tang. "Experimental Investigation on Rubber-Expanded Tube-to-Tubesheet Joints of Zr Heat Exchangers." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61712.
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Mechanics of flexible expansion was expounded, and technology points of uniform rubber expanding in tube-to-tubesheet joints of Zirconium (Zr) heat exchangers were introduced. A series of pull-out strength and tightness experiments were performed for rubber-expanded tube-to-tubesheet joints. The experimental results show that the pull-out strength decreases linearly with increasing of operating temperature in the range of 20∼300°C, the pull-out strength of joints composed of Zr tubes attached to 16MnR and 316L tubesheets (abbreviated as Zr/16MnR and Zr/316L joints and heat exchangers include these joints are called Zr heat exchangers) drops much faster than that of joints composed of Titanium (Ti) tubes attached to 16MnR tubesheets (abbreviated as Ti/16MnR joints), and the joint strength can meet the requirements specified in Chinese code & standard at the experimental conditions. It is also found that the tightness of rubber expanded tube-to-tubesheet joints drops obviously with the increase of working temperature from 20 to 200°C, and the sealing performance of the joints enhances markedly when rubber-expanded tube-to-tubesheet joints are subsequently expanded with roller. Moreover, the influences of Enlargement Rate of Tubesheet Hole (ERTH) on the strength of rubber-expanded tube-to-tubesheet joints is discussed, it is observed that the pull-out strength of the connection joints with non-grooved tubesheet holes increases linearly with increasing of ERTH when the expanding pressure is not larger than 38 MPa, whereas this is not the case for the joint with grooved tubesheet holes.