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Academic literature on the topic 'H13 tool steel'

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Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "H13 tool steel"

Salem, Islam, Mohamed Kamal El-Fawkhry, Ahmed A. Abdel-Khalek, M. H. Khedr, and Taha Mattar. "Exo-Inoculant Modification of Secondary Phase Precipitation in H13 Tool Steel." Key Engineering Materials 835 (March 2020): 13–21. http://dx.doi.org/10.4028/www.scientific.net/kem.835.13.

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Secondary phase carbides in term of type and morphology are considered as the most challenge facing the applications of hot work tool steel. AISI H13 tool steel is one of the most applicable hot work tool steel grades. M23C6, M6C and MC are the common secondary carbides that are forming throughout the martensite matrix of H13 tool steel. In this research, nanoinoculant silicon nitride was added to the molten H13 tool steel to act as an inoculant for the secondary carbide categories through ladle treatment process. By using OM and SEM, it was observed that nanoinoculant has the great impact in the nucleation of secondary carbides into fine shape, in particular M23C6 type. In addition, mechanical tests proved that the nucleation of secondary carbides promotes the mechanical properties of hot work H13 tool steel to its ultimate. Impact toughness of the inoculated H13 tool steel was observed with higher value than that was done at the ordinary H13 tool steel. At the meantime, wear resistance of inoculated H13 tool steel was multiplied two times higher than as delivered H13 tool steel.

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Suhaily, Mokhtar, A. K. M. Nurul Amin, Anayet Ullah Patwari, and Nurhayati Ab Razak. "Machinability Improvement by Workpiece Preheating during End Milling AISI H13 Hardened Steel." Advanced Materials Research 264-265 (June 2011): 894–900. http://dx.doi.org/10.4028/www.scientific.net/amr.264-265.894.

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Hardened materials like AISI H13 steel are generally regarded as s difficult to cut materials because of their hardness due to intense of carbon content, which however allows them to be used extensively in the hot working tools, dies and moulds. The challenges in machining steels at their hardened state led the way to many research works in amelioration its machinability. In this paper, preheating technique has been used to improve the machinability of H13 hardened steel for different cutting conditions. An experimental study has been performed to assess the effect of workpiece preheating using induction heating system to enhance the machinability of AISI H13. The preheated machining of AISI H13 for two different cutting conditions with TiAlN coated carbide tool is evaluated by examining tool wear, surface roughness and vibration. The advantages of preheated machining are demonstrated by a much extended tool life and stable cut as lower vibration/chatter amplitudes. The effects of preheating temperature were also investigated on the chip morphology during the end milling of AISI H13 tool steel, which resulted in reduction of chip serration frequency. The preheating temperature was maintained below the phase change temperature of AISI H13. The experimental results show that preheated machining led to appreciable increasing tool life compared to room temperature machining. Abrasive wear, attrition wear and diffusion wear are found to be a very prominent mechanism of tool wear. It has been also observed that preheated machining of the material lead to better surface roughness values as compared to room temperature machining.

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Tridello, A., D. S. Paolino, G. Chiandussi, and Massimo Rossetto. "Different Inclusion Contents in H13 Steel: Effects on VHCF Response of Gaussian Specimens." Key Engineering Materials 665 (September 2015): 49–52. http://dx.doi.org/10.4028/www.scientific.net/kem.665.49.

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The effect of different inclusion contents on the VHCF strength of H13 tool steels is presented. Two different H13 tool steels were investigated: the Uddeholm Orvar® 2 Micronized obtained by conventional casting, and the Uddeholm Orvar® Supreme obtained by electroslag remelting (ESR). Ultrasonic tests were performed on Gaussian specimens (risk volume about 2300 mm3) up to 1010 cycles or up to failure and fracture surfaces were investigated with SEM in order to analyze the inclusions from which VHCF crack nucleated. Experimental results show that the VHCF strength estimated by using the Murakami’s model of the H13 Uddeholm Orvar® Supreme steel is about 15% larger than that of the H13 Uddeholm Orvar® 2 Micronized steel.

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Zhang, Jin Xiang, He Bin Wang, Lin Lu, Jin Feng Huang, Hua Cui, and Ji Shan Zhang. "Effects of Spray Forming and Aging Treatment on the Microstructures and Hardness of H13 Tool Steel." Advanced Materials Research 602-604 (December 2012): 405–10. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.405.

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The microstructures and hardness of spray-formed and aged H13 steel were investigated by OM, SEM, XRD and hardness tester. Compared to the as-cast H13 steel, the microstructures of the spray-formed H13 steel is characterized by lower bainite, martensite and much more retained austenite, inducing lower hardness than the as-cast H13. The peak aging temperature for the spray-formed H13 steel is 50°C higher than the commercial H13 steel (500°C) for their different microstructures. After aged at 550°C for 50h, a much higher hardness (about 53 HRC) can be retained in the spray-formed H13 steel, showing an excellent thermal stability at 550°C.

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Mochtar, Myrna Ariati, and Rizki Aldila. "Die Soldering Behavior of H13 and Cr-Mo-V Tool Steel on Die Casting Process on Nitriding-Shot Pinning Die Surface Treatment." Materials Science Forum 1000 (July 2020): 381–90. http://dx.doi.org/10.4028/www.scientific.net/msf.1000.381.

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Die soldering is a sticking phenomenon between molten aluminum with the surface of steel die in the die casting process, which results in damage to the cast products and l the steel die. In this research, two die materials, H13 and Cr-Mo-V steels were used. Those dies were then treated by two process variables, shot pinning and nitriding-shot pinning. To simulate the die casting process, the samples were dipped into molten Aluminum-Si alloy, ADC12 at 680oC for 30, 300, and 1800 seconds. Characterizations were focused on the surface of the steel, which includes microstructure observation by a microscope, microhardness profile, compound identification, and weight loss measurements. It was found that H13 steel and Cr-Mo-V steel treated by nitriding–shot pinning have higher hardness up to 100% and thinner intermetallic layer. On H13 steel, the compact layer thickness decreased from 19 μm to 17 μm and from 96 μm to 80 μm for the broken layer. Similar trends occurred for Cr-Mo-V steel, where the thickness of the compact layer and broken layer decreased from 38 μm to 19 μm and 119 μm to 45 μm respectively. These results indicate that H13 and Cr-Mo-V steels that were treated by nitriding–shot pinning have a better resistance to die soldering.

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Kataoka, Kota, and Hideshi Nakatsu. "Fabrication of Ultra-Fine Grained Hot Work Tool Steels by Powder Metallurgy Process through Mechanical Alloying Treatment." Materials Science Forum 638-642 (January 2010): 1714–18. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.1714.

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Hot work tool steels generally consist of the tempered martensitic structure and they are high strength materials using all strengthening mechanisms, such as strain strengthening, grain refinement strengthening, solid solution strengthening and precipitation strengthening. It is necessary to use the grain refinement strengthening that can bring both higher strength at high temperature and toughness than those of conventional steels. In this study, hot work tool steels with ultra-fine grained structure were fabricated by the mechanical alloying treatment. The powder mixture of atomized AISI H13 steel powders and Y2O3 powders was mechanically alloyed by a planetary ball mill for 360ks. The mechanically alloyed powders were packed in a stainless steel tube in a vacuum and then consolidated by hot rolling for full densification. The consolidated material was austenitized at 1293K, which was general austenitizing temperature of H13 steel, and then oil-quenched. Through this process, an ultra-fine grained H13 steel with equiaxed grains of about 0.3 microns in diameter could be obtained. A quenched hardness of the developed steel was comparable to that of an AISI M2 high speed steel produced by melting and hot-working process. Furthermore, although tempered hardness of the M2 steel decreases with increasing tempering temperature of 848K or higher, that of the developed steel does not decrease so much. Therefore the hardness of the developed steel exceeds that of the M2 steel at tempering temperatures over 923K.

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Akyıldız, Ezgi, Mert Altay, Faiz Muhaffel, Seçkin Özkurt, Erdem Atar, and Hüseyin Çimenoğlu. "Impact-Sliding Wear Behaviour of Nitrided H13 Steel Tool Steels." Key Engineering Materials 813 (July 2019): 417–22. http://dx.doi.org/10.4028/www.scientific.net/kem.813.417.

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In the scope of this study, quenched and tempered H13 steel samples were subjected to conventional (CN) and low temperature (LTN) gas nitriding in a fluidized bed reactor. Structural examinations revealed that surfaces of the CN sample were covered with about 1-2 µm thick compound layer (CL) with an underlying ~30 µm thick nitrogen diffusion zone (NDZ), while outer surface of the LTN sample consisted of ~25 µm thick NDZ. The surface hardness values were measured as 1320 HV0.1 for LTN sample and 1220 HV0.1 for CN sample. Under impact sliding conditions, wear mechanisms of the CN and LTN samples were determined as “oxidation + fatigue” at RT and “plastic deformation” at 600 °C. As a general trend CN sample exhibited better impact sliding wear resistance compared to LTN sample both at RT and 600 °C.

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Ackermann, Michal, Jiří Šafka, Lukáš Voleský, Jiří Bobek, and Jitendra Reddy Kondapally. "Impact Testing of H13 Tool Steel Processed with Use of Selective Laser Melting Technology." Materials Science Forum 919 (April 2018): 43–51. http://dx.doi.org/10.4028/www.scientific.net/msf.919.43.

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This paper deals with experimental determination of toughness, hardness and impact properties of AISI H13 (DIN 1.2344) tool steel which was manufactured using Selective Laser Melting (SLM) technology. The H13 is a chromium-based tool steel which is primarily used for hot working applications such as pressure casting moulds for automotive industry. Evaluation of toughness and impact properties are vital for reliable use of SLM-processed material, especially in the case of highly loaded structures. Mechanical tests were carried out on printed specimens, subjected to thermal treatment and proper data were evaluated. For better understanding of differences between conventionally produced and SLM-processed material, same mechanical tests were done even for hot-rolled H13 tool steel. SLM-printed material shows more brittle behaviour than conventionally made material. This is most probably caused by combination of H13 thermal properties and fast melting and solidification due to SLM processing.

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Pathak, Hrishikesh, Sanghamitra Das, Rakesh Doley, and Satadru Kashyap. "Optimization of Cutting Parameters for AISI H13 Tool Steel by Taguchi Method and Artificial Neural Network." International Journal of Materials Forming and Machining Processes 2, no. 2 (July 2015): 47–65. http://dx.doi.org/10.4018/ijmfmp.2015070104.

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In the present study an attempt has been made to investigate the effect of cutting parameters (cutting speed, feed rate, and depth of cut) on surface roughness and material removal rate (MRR) during dry turning operation of AISI H13 tool steel as per Taguchi's experimental design technique using an L9 orthogonal array. Signal to noise ratio (S/N) results and Analysis of Variance (ANOVA) were employed in order to investigate the optimal and significant cutting characteristics of H13 tool steel respectively. This paper focuses on optimizing the cutting parameters for minimum surface roughness and maximum MRR of H13 tool steel using high speed steel (HSS) as the cutting tool during turning. The results indicated that feed has a significant influence on surface finish and depth of cut on MRR when turning operation was carried out with HSS cutting tool. An artificial neural network model and regression equations were also developed to obtain minimum surface roughness and maximum MRR at different cutting conditions.

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Abdulhadi, Hassan, Syarifah Ahmad, Izwan Ismail, Mahadzir Ishak, and Ghusoon Mohammed. "Thermally-Induced Crack Evaluation in H13 Tool Steel." Metals 7, no. 11 (November 6, 2017): 475. http://dx.doi.org/10.3390/met7110475.

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Dissertations / Theses on the topic "H13 tool steel"

Persson, George. "Process development for H13 tool steel powder in binder jet process." Thesis, Högskolan i Gävle, Maskinteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-32694.

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Additive manufacturing brings versatility and new degree of freedom for part design and manufacturing possibilities. Binder jetting is powder bed printing technique that does not require direct energy transfer rather binding powder metal particles through mechanical entanglement by use of the organic binder. The polymer chains in the solution hardens when heated thus creating a green part. Green parts are sintered in high temperature to adhere metal powder particles together creating a solid body. Binder jetting still developing to its full potential in scalability and material portfolio. This thesis aims to contribute know how in process and material development of H13 tool steel in very fine particle size distributions from -16 µm to -10µm. Process parameters as well as sintering cycle developed specifically for H13 fine powders. With 52 samples printed, sintered in four different temperatures and analyzed material properties such as density and hardness to evaluate how particle size distributions affect printing process, densification and shrinkage in the sintering. Density of the green body has been evaluated through measurements of dimensions and weight, sintered density was analyzed by Archimedes method and light optical metallography. Trials for the processing and evaluation of the powders concluded that it is possible to use ultra-fine PSDs in binder jetting process with good results, this opens up opportunity for increased sustainability and profitability for powder manufacturing industry. Particle size distribution of -10 µm has outperformed the -16 µm in areas of relative density of the green body, sintered density and hardness. Although superior performance, the -10 µm requires higher ultrasonic intensity and lower spreading speed to achieve homogeneous powder bed. For the -16 µm powder it is worth noting that it is possible to bring up green density with further process development. Although materials presented high hardness in as printed state compared to that of PIM manufactured parts, achieved hardness is not satisfactory for the applications of the alloy and requires heat treatment corresponding to customer requirements.

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Baharudin, B. T. Hang Tuah. "Experimental investigation of high speed micro machining of H13 tool steel and titanium alloy 6-4." Thesis, University of Liverpool, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494133.

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High-accuracy miniaturized components are increasingly in demand for various industries such as aerospace, biomedical, electronics, environmental, communication and automotive, and this coupled with new developments of High Speed Machining (HSM) has led to the emergence of a strong and viable technology in High Speed Micro Machining. This technology is very important in bridging the macro-domain and the nano- and micro- domains for making functional miniaturized components. High speed Micro Machining is a specific technology where high spindle speeds, high performances cutting tools and high accuracy control systems are used. The understanding of this technology is still not well established and theories are still under development. A major implication of the High Speed Micro Machining process is the relatively high machining forces with respect to the cutting tool's size, which often cause low process reliability and high costs, due to frequent tool failures and short tool life. The aim of this investigation is to contribute towards a fundamental understanding of the effects of increased spindle speed in High Speed Micro Machining.

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Toh, Chun Kiong. "Evaluation of cutter path strategies and orientations when high speed milling hardened AISI H13 work tool steel." Thesis, University of Birmingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422919.

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The use of High Speed Milling (HSM) for the production of moulds and dies is becoming more widespread. Critical aspects of the technology include cutting tools, machinability data, cutter path generation and technology. Much published information exists on cutting tools and related data (cutting speeds, feed rates, depths of cut, etc.), however, relatively little information has been published on the evaluation of cutter paths for this application. Most of the research work is mainly focused on cutter path generation techniques. Works with regard to cutter path evaluation on tool wear and tool life, surface integrity and relevant workpiece machinability characteristics are scant. Therefore, a detailed knowledge on the evaluation of cutter path strategies and orientations when high speed rough and finish milling is essential in order to improve productivity and surface quality respectively. The present work deals with some aspects related to the evaluation on the machinabiltiy of hardened AISI H13 hot work tool steel of 52 Rockwell Hardness C scale when high speed rough and finish milling using designated cutter path strategies and orientations. A literature review has been carried out to identify the various geometrical forms that are commonly utilised and common cutter path strategies presently employed in the mould and die industries. A review on the cutter path strategies and techniques is identified and classified according to the rough or finish milling stage. The selection and evaluation techniques notably feed rate, cutting tools and cutter path strategies and orientations are presented. Machinability criteria in terms of tool life and tool wear, cutting forces, tool wear and vibration signatures, cutting temperature and chip formation are reviewed. Last but not the least, surface integrity analysis on machined hardened steels are detailed and reviewed. The experimental work was divided into three phases. The first phase dealt with the investigation by employing high axial depths of cut (10 mm < Ai <20 mm) on three main cutter path strategies when rough milling hardened steels. In the second phase, the spotlight of the research was on finish milling an inclined workpiece surface using different cutter path orientations through machinability assessments in order to identify the optimum cutter path orientation. In the final phase, the effect of various cutter path orientations on workpiece surface integrity when finish milling hardened steels was investigated. The experimental results for Phase 1 revealed that in general where higher material removal rates, shorter machining time, longer tool life and higher volume of metal removed were of concern, raster cutter path strategy was the most favourable at all axial depths of cut employed. In Phase 2 when finish milling at an inclined workpiece angle of 75 0, tool life was highest when employing a downward cutter path orientation. On the other hand, upward cutter path orientation would be preferred where low workpiece surface roughness was concerned. In the final phase, surface integrity analysis revealed that upward cutter path orientation in particular the single direction raster vertical upward orientation was the most preferred in achieving optimum component life.

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Pereira, Elaine Cristina. "Tratamento superficial por refusão a laser em aços AISI H13 e AISI 420." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263598.

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Orientador: Maria Clara Filippini Ierardi
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-08-06T10:03:07Z (GMT). No. of bitstreams: 1 Pereira_ElaineCristina_M.pdf: 3869413 bytes, checksum: b9bfe02035758d11f3c1b43e411db4d4 (MD5) Previous issue date: 2006
Resumo: A refusão superficial a laser é uma técnica muito promissora para a melhoria das propriedades mecânicas dos aços ferramentas através da homogeneização química e refino da estrutura. O tratamento a laser promove o aquecimento e resfriamento rápidos da camada superficial resultando em transformações microestruturais que promovem a melhoria do desempenho sem envolver o reprocessamento do material como um todo. Neste trabalho foram analisadas, além da microestrutura resultante do tratamento de refusão a laser, a resistência à corrosão e a resistência à flexão dos aços ferramenta para trabalho a quente AISI H13 e inoxidável martensítico AISI 420. Os resultados experimentais foram comparados com os mesmos aços sem tratamento. Observou-se que a microestrutura resultante do tratamento de refusão a laser é formada de martensita e austenita residual. A estrutura refinada e a presença de martensita resultaram em um aumento da dureza, apesar do grande volume de austenita residual. A dissolução de carbonetos e incorporação dos elementos de liga na matriz, como por exemplo o cromo, promoveu uma melhoria no comportamento em corrosão
Abstract: Laser surface melting is a very promising technique to improve the mechanical properties of tool steel by the chemical homogenization and refinement of the microstructure. Laser treatment promotes the rapid heating and cooling of the superficial layer resulting in microstructure transformations, which improve material performance without involving the reprocessing of the bulk material. In this work, besides the microstructure resulting from laser surface melting, corrosion resistance and deflection of hot-work tool steel AISI H13 and martensitic stainless steel AISI 420 were analyzed. The experimental results were compared to the same steels without treatment. The microstructure of the laser surface melting is formed by martensite and retained austenite. The refined structure and the presence of martensite increased hardness, despite the large volume of retained austenite. The carbides dissolution and incorporation of alloying elements into the matrix, for example chrome, improve the corrosion behavior
Mestrado
Materiais e Processos de Fabricação
Mestre em Engenharia Mecânica

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Jones, Bradley Valiant. "Temperature and Stress Effect Modeling in Fatigue of H13 Tool Steel at Elevated Temperatures with Applications in Friction Stir Welding." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/4442.

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Tooling reliability is critical to welding success in friction stir welding, but tooling fatigue is not well understood because it occurs in conditions that are often unique to friction stir welding. A fatigue study was conducted on a commonly used tooling material, H13 tool steel, using constant stress loading at temperatures between 300°C and 600°C, and the results are presented. A model is proposed accounting for temperature and stress effects on fatigue life, utilizing a two-region Arrhenius temperature model. A transition in temperature effect on fatigue life is identified. Implications of the temperature effect for friction stir welding suggest that tooling fatigue life dramatically decreases above 500°C and accelerated testing should be conducted below 500°C.

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Andersson, Henrik. "Thermal fatigue and soldering experiments of additively manufactured hot work tool steels." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-68677.

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Modern manufacturing processes are under a never ending evolvement. Lowered manufacturing costs, higher part quality, shorter lead times and lower environmental impact are some important drivers for this development. Aluminum die casting is an effective and attractive process when producing components for e.g. the automotive sector. Die casting process development, and hot work tool steel development for the die casting dies has led to the state of the art of die casting today. However, with the disruptive emergence of Additive Manufacturing (AM) of hot work steel alloys, new interesting features such as improved conformal cooling channels inside die casting molds can be produced. The new way to manufacture die casting dies, need basic investigating of the AM produced hot work tool steel properties, and their applicability in this demanding hot work segment. Die casting dies face several detrimental wear mechanisms during use in production, three of which has been isolated and used for testing three AM produced steel alloys and one conventional premium hot work tool steel. The wear mechanisms simulated are; thermal fatigue, static soldering and agitated soldering. The aim is to study the AM produced steels applicability in the die casting process. The tested materials are; Premium AISI H13 grade Uddeholm Orvar Supreme, AM 1.2709, AM UAB1 and AM H13. Based on current investigations the conclusion that can be made is that with right chemistry, and right AM processing, conventional material Uddeholm Orvar Supreme still is better than AM H13. This also complies with the literature study results, showing that conventional material still is better than AM material in general.
Våra moderna tillverkningsprocesser är under ständig utveckling. Drivande motiv är minskade tillverkningskostnader, högre tillverkningskvalitet, kortade ledtider samt minskad miljöpåfrestning. Pressgjutning av aluminium är en effektiv och attraktiv tillverkningsprocess ofta använd inom till exempel fordonsindustrin. Utvecklingen av pressgjutningsteknologin har gått hand i hand med utvecklingen av det varmarbets-verktygsstål som används i gjutformarna (pressgjutningsverktyget). Den utvecklingen har lett till dagens processnivå och branschstandard. Men med den revolutionerande additiva tillverkningsteknologins (AM) intåg, och möjlighet att producera komponenter av varmarbetsstål, kommer nya intressanta möjligheter att integrera komplex geometri så som yt-parallella kylkanaler i verktyget utan att tillverkningskostnaden blir för hög etc. Det nya sättet att producera pressgjutningsverktyg ger upphov till behovet av grundläggande materialundersökningar av sådant AM-material, samt hur tillförlitligt det är i pressgjutningsverktyg med pressgjutningens krävande materialegenskapsprofil. Pressgjutningsverktyg utsätts för många förslitningsmekanismer och för höga laster, tre av dessa mekanismer har isolerats för kontrollerade tester av ett konventionellt material och tre AM materials responser. Förslitningsmekanismerna som efterliknats är; termisk utmattning, statisk soldering och agiterad soldering. Målet med undersökningarna är att studera AM producerade materials lämplighet i pressgjutningsprocessen. De material som testats är konventionella premium varmarbetsstålet Uddeholm Orvar Supreme av typ AISI H13, AM 1.2709, AM UAB1 och AM H13. Undersökningarnas slutsats är att med rätt kemisk sammansättning, och med rätt AM printing parametrar, är konventionellt material fortfarande mer applicerbart i pressgjutning än AM producerat. Den slutsatsen faller väl I samklang med resultaten från mekanisk provning som återspeglas i litteraturstudien, som visade visar att konventionellt material är generellt bättre än AM material.

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Seriacopi, Vanessa. "Simulação numérica do campo de tensões na microestrutura do aço ferramenta AISI H13 durante o forjamento a quente." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-27122013-115825/.

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A falha devido à ocorrência de fadiga térmica de materiais utilizados como ferramentas para trabalho a quente é identificada durante serviço e ocorre devido ao acúmulo de dano localizado. O aço AISI H13 é comumente utilizado em ferramentas para a conformação a quente devido à sua boa tenacidade à fratura e resistência ao desgaste, e considerável resistência à perda de dureza a quente. Este trabalho teve como motivação estudar a relação entre a microestrutura do aço H13 e os carregamentos térmicos e mecânicos, que possam levar à falha de ferramentas para forjamento a quente. Para este estudo, fez-se uso de meios computacionais (simulação numérica) aliados aos conhecimentos de caracterização microestrutural e do comportamento mecânico dos materiais. Nesta abordagem, elabora-se uma malha na microestrutura do referido aço no software OOF2®, do NIST, e as análises são feitas a partir da aplicação do método dos elementos finitos com o emprego do software Abaqus®. Com isso, torna-se possível examinar o efeito de aspectos microestruturais, como a influência dos precipitados, na ocorrência de tensões e de deformações na microestrutura de forma a obter um mapeamento de regiões críticas ao dano e à falha na ferramenta de forjar a quente. Os estudos são baseados e comparados com trabalhos já publicados, e simulam carregamentos e variações de temperatura no material em questão de modo a verificar as condições que favorecem a nucleação de trincas por fadiga térmica. Como principais conclusões e contribuições obtidas da análise realizada, podem ser destacadas: (i-) as regiões críticas que vêm a propiciar a nucleação de trincas térmicas são os precipitados e as interfaces; (ii-) no campo de tensões, a propriedade das fases que exerce a maior influência é o módulo de elasticidade; (iii-) os diferentes coeficientes de expansão térmica das fases geram deformações térmicas mais elevadas e tensões compressivas nas interfaces; (iv-) as deformações térmicas nos precipitados são superiores às da matriz devido à influência no campo de tensões; (v-) em termos de tensões térmicas, o momento do ciclo térmico mais crítico para a matriz é o resfriamento; e (vi-) ao passo que, nos precipitados, a etapa mais crítica é o aquecimento.
Failure due to thermal fatigue can occur in hot working tool materials and its onset takes place in the regions where the highest stress and strain are reached. AISI H13 steel is often used as a hot working tool since it has good toughness and wear resistance, and also a sensible resistance to loss of hot hardness. This study was carried out by means of finite element method (FEM) combined with microstructural characterization and mechanical behavior of materials analysis. According to this approach, H13 steel microstructure, in which carbides could be observed, was meshed by means of OOF2® (NIST). Moreover, the ABAQUS® commercial FEM software was used to simulate thermal and mechanical loading applied in the tool throughout mechanical processing. The conducted analysis allowed to observe the effect of precipitates on stress-strain distribution at different temperatures and loads. Hence, critical regions, in which damage could be favored as well failure onset in the microstructure of the hot forging tool, are displayed. The investigation was based on and compared to literature results and it showed that it can be possible to design the microstructure of hot forging materials, in which an improvement in the thermal fatigue resistance could be improved. The main remarks and conclusions of this work are as follows: (i-) precipitates and interfaces are preferential regions to nucleation and growth of cracks, and they seem to work as stress concentrators; (ii-) modulus of elasticity of phases has the strongest influence in the stress fields of the microstructure; (iii-) the mismatch between thermal expansion coefficients of the phases leads to compressive stresses on interfaces and also the highest thermal strain; (iv-) thermal strains are higher on the precipitates than on the steel matrix; (v-) elastic-plastic properties of steel matrix influenced on thermal cycles. In addition, cooling is the most critical condition of thermal stresses by analyzing each thermal cycle in this phase; and (vi-) whereas the precipitates have elastic behavior, and the most critical step is the heating, in which the maximum temperature of the cycle is reached.

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Basso, Rodrigo Leonardo de Oliveira. "Efeito do carbono no processo de nitrocarburização com plasma pulsado da liga metálica AISI H13." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277746.

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Orientador: Fernando Alvarez
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin
Made available in DSpace on 2018-08-11T05:33:37Z (GMT). No. of bitstreams: 1 Basso_RodrigoLeonardodeOliveira_D.pdf: 34307948 bytes, checksum: fd2817ddc7e94a48942bf4136fdb0472 (MD5) Previous issue date: 2007
Resumo: Este trabalho apresenta um estudo sobre os efeitos da incorporação de carbono e nitrogênio na formação de uma camada monofásica, compacta e homogênea, composta por carbonitretos do tipo e -Fe2-3(C,N), na superfície da liga metálica AISI H13. Também são apresentados estudos sobre os efeitos da incorporação desses elementos nas propriedades mecânicas, químicas e na microestrutura da superfície da liga metálica. A incorporação desses elementos na superfície do material foi feita utilizando-se o tratamento termoquímico de nitrocarburização por plasma pulsado em atmosferas contendo N2+ H2+ CH4 em diferentes proporções. Além da composição da atmosfera de tratamento, também foram variadas a temperatura e o tempo de tratamento. De maneira a complementar o estudo do comportamento da liga metálica frente ao tratamento termoquímico a plasma, também foram preparadas amostras com atmosferas oxidantes contendo CO2. A análise da composição química da superfície das amostras foi feita através de espectroscopia de fotoelétrons e mostra que a incorporação de nitrogênio sofre grande influência da quantidade de gás contendo carbono, presente no plasma. Porém a incorporação desses elementos não é diretamente proporcional à concentração do gás contendo esse elemento. Ao contrário do esperado, aumentando-se suficientemente a concentração desses elementos na atmosfera de tratamento, não acarreta em aumento na concentração dos mesmos no material. Por outro lado a análise através de difração de raios X revelou a formação de estruturas cristalinas consistentes com o diagrama de fases do sistema Fe-C-N. Para menores concentrações de compostos de carbono no plasma, a formação de nitretos e carbonitretos é predominante enquanto que maiores quantidades desse elemento levam ao surgimento da fase cementita e -Fe3 C, indesejável por possuir baixa resistência mecânica. As propriedades mecânicas da superfície foram estudadas através de medidas de nano e micro-dureza e seus resultados indicam que, como esperado, amostras com maior quantidade de nitrogênio incorporada possuim maior dureza da superfície. Esse comportamento é condizente com a microestrutura observada por microscopia eletrônica de varredura que mostra o entrelaçamento dos grãos da estrutura do aço e o preenchimento de seus contornos com carbonitretos de ferro que dificultam a movimentação dos planos cristalinos do cristal aumentando sua dureza. Foi verificado que as concentrações de carbono e de nitrogênio contido no material exercem grande influência sobre a reatividade da superfície das amostras frente a processos corrosivos em meios contendo íons cloreto. Esse comportamento foi verificado através de medidas de corrosão em solução aquosa de NaCl a 0,9 vol.%. Novamente os resultados apontam que maior concentração de nitrogênio é responsável por conferir a superfície maior proteção contra corrosão. Esses resultados são atribuídos a presença de uma mono-fase compacta formada pela fase e - Fe2-3 (C,N) na superfície das amostras. Resultados menos significativos foram obtidos quando a superfície continha uma mistura de fases contendo g -Fe4 N, e -Fe2-3 N, a -Fe e CrN
Abstract: This work presents a study on the effect of the incorporation of carbon and nitrogen on he formation of a singlephase homogeneous layer, composed by e -Fe2-3(C,N) carbonitrides, on the top surface of a AISI H13 tool steel. We also present studies on the effect of the incorporation of these elements (C and N) in the microstructure and in the mechanical and chemical properties of the surface of the metallic alloy. The incorporation of these elements in the surface of the material was made using the plasma nitrocarburizing termochemical treatment in atmospheres containing N2 + H2+CH4 in different ratios. Beyond the composition of the treatment atmosphere, the temperature and the time of treatment had been also varied. In way to complement the study of the behavior of the metallic alloy we had been also prepared samples with oxidating atmospheres containing CO2. The chemical composition analysis of the sample¿s surface was made through X-ray photo-electron spectroscopy and pointed that nitrogen incorporation suffers great influence from the amount of gas containing carbon, on the plasma atmosphere. However the incorporation of these elements is not directly proportional to the concentration of the gas containing this element. In con-trast, increasing enough the concentration of these elements in the treatment atmosphere, it does not cause increase in the concentration of the same element in the material¿s surface. On the other hand the X-ray diffraction analysis showed the formation of crystalline structures, consistent with the phase diagram of Fe-C-N system. For lesser carbon concentrations in the plasma, the formation of nitrides and carbides are predominant whereas bigger amounts of this element lead to the formarion of the cementite phase (q -Fe3 C , undesirable for possessing low resistance mechanics). The mechanical properties of the surface had been studied by means of nano and microhardness and its results indicate that, as expected, samples with bigger amount of incorporated nitrogen possesses bigger hardness in its surface. This behavior is in agreement with the observed microstructure observed by scanning electron microscopy that show the interlacement of the grains of the steel structure and the fulfilling of its boundaries with iron carbonitrides that make it difficult the movement of the crystalline plans of the lattice increasing its hardness. It was verified that the nitrogen and carbon concentrations in the material¿s surface, are of great influence on the reactivity of the surface regarding to corrosive processes in clorine solutions. This behavior was verified by measurements of corrosion in NaCl aqueous solution. Again the results pointed that bigger nitrogen concentration is responsible for protecting the surface against corrosion process. These results are attributed to the presence of a compact and homogeneous e -Fe2-3(C,N) surface layer on the surface of the samples. Less significant results had been gotten when the surface contained a mixture of phases containing g -F e4N, e -Fe2-3 N, a -Fe e CrN
Doutorado
Física da Matéria Condensada
Doutor em Ciências

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Babu, Sailesh. "A material based approach to creating wear resistant surfaces for hot forging." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1101836555.

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Thesis (Ph. D.)--Ohio State University, 2004.
Title from first page of PDF file. Document formatted into pages; contains xxii, 185 p.; also includes graphics (some col.). Includes bibliographical references (p. 178-185).

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Arain, Attaullah. "Heat treatment and toughness behavior of tool steels (D2 and H13) for cutting blades." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0003/MQ45596.pdf.

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Books on the topic "H13 tool steel"

Toh, Chun Kiong. Evaluation of cutter path strategies and orientations when high speed milling hardened AISI H13 hot work tool steel. Birmingham: University of Birmingham, 2002.

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Arain, Attaullah. Heat treatment and toughness behavior of tool steels (D2 and H13) for cutting blades. Ottawa: National Library of Canada, 1999.

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Book chapters on the topic "H13 tool steel"

Bryson, William E. "Heat Treating H13 Tool Steel." In Heat Treatment, Selection, and Application of Tool Steels, 63–68. München: Carl Hanser Verlag GmbH & Co. KG, 2005. http://dx.doi.org/10.3139/9783446436701.008.

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Wang, Shaodong, Jianyin Chen, and Lijue Xue. "Characteristics of H13 Tool Steel Coatings by Pulsed Nd:YAG Laser Cladding." In TMS2013 Supplemental Proceedings, 201–8. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118663547.ch26.

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Butola, Ravi, Qasim Murtaza, and Ranganath M. Singari. "CNC Turning and Simulation of Residual Stress Measurement on H13 Tool Steel." In Lecture Notes on Multidisciplinary Industrial Engineering, 337–48. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9072-3_29.

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Sahlot, Pankaj, R. S. Mishra, and Amit Arora. "Wear Mechanism for H13 Steel Tool During Friction Stir Welding of CuCrZr Alloy." In Friction Stir Welding and Processing X, 59–64. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05752-7_6.

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Son, Jongyoun, Gwangyong Shin, Kiyong Lee, Chang-hwan Choi, and Dosik Shim. "High-temperature Properties of Hot-Work Tool Steel (AISI H13) Deposited via Direct Energy Deposition." In Forming the Future, 1665–76. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75381-8_140.

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Ding, Ting, Junfeng Su, Henry Hu, Xueyuan Nie, and Ronald M. Barron. "Mathematical Modeling of Heat Transfer and Thermal Behaviour of Tool Steel H13 in Molten Aluminum Alloy A380." In Materials Processing Fundamentals, 99–108. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118662199.ch11.

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Ding, Ting, Junfeng Su, Henry Hu, Xueyuan Nie, and Ronald M. Barron. "Mathematical Modeling of Heat Transfer and Thermal Behaviour of Tool Steel H13 in Molten Aluminum Alloy A380." In Materials Processing Fundamentals, 99–108. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-48197-5_11.

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Raj, Anil, K. Ramesha, Joel U. Sajan, Danish Mohammed Khan, and U. A. Varshini. "Comparison of Various Types of Lubrication During Hard Turning of H13 Tool Steel by Analysing Flank Wear Using ANOVA." In Lecture Notes in Mechanical Engineering, 489–97. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9931-3_47.

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Valarmathi, T. N., S. Sekar, G. Anthony, R. Suresh, and K. N. Balan. "Experimental Studies on Surface Roughness of H12 Tool Steel in EDM Using Different Tool Materials." In Lecture Notes in Mechanical Engineering, 241–47. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2697-4_27.

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Dhokey, N. B., P. Lalge, A. Rajankar, K. Bawane, and R. Mahajan. "Effect of Cryosoaking Period on Soft Tempering Temperature and Wear Mechanism in AISI H11 Tool Steel." In Proceedings of the 7th International Conference on Fracture Fatigue and Wear, 569–80. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0411-8_51.

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Conference papers on the topic "H13 tool steel"

Parishram, P., Ajay P. Malshe, and Arnie Fulton. "Laser Melt Processing of H13 Tool Steel." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15243.

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H13 has been widely used in hot and cold work tooling applications and the thermal processing of H13 has important industrial significance particularly where longer tool life is important. This paper presents some results of the CO2 laser assisted processing of H13 tool steel. A block of preheated H13 tool steel was laser processed at six different parameters. Laser power (P) and Scan speed (V) were chosen as the primary variables. The processed region was characterized for geometry, micro hardness and microstructure. The block temperature was monitored using an alumel-chromel thermocouple. Optical observations indicated that the aspect ratios of the processed zone increased with power. Microhardness observations indicate that higher cooling rate parameters had higher hardness values. Finer dendrites were visible at higher power values. These observations were corroborated by magnitude of thermal change predictions made using the Rosenthal equation

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Talukdar, Tushar K., Liang Wang, and Sergio D. Felicelli. "Simulation of Residual Stress in Lens Deposited H13 Tool Steel on Copper Substrate." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62321.

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Solidification cracking represents a significant scientific and technical challenge in the rapid fabrication of bimetallic parts involving Cu and H13 tool steel. The main cause of the cracking formation is attributed to the residual stress accumulation, which depends on the thermal history and phase transformation during the deposition. In this research, a thermomechanical three-dimensional finite element model is developed to determine the temperature history and residual stress in Cu-H13 samples deposited by the Laser Engineered Net Shaping (LENS) process. The development of the model was carried out using the SYSWELD software package. The metallurgical transformations are taken into account using the temperature dependent material properties and the continuous cooling transformation diagram. Two different scanning strategies — alternative and unidirectional — are studied. The same model is also applied to a H13-H13 sample to compare the results. The input laser power is optimized for each layer and three different scanning speeds to maintain a steady molten pool size. It is observed that for a constant scanning speed the required laser power decreases with addition of more layers, and with the increase of scanning speed the laser power needs to be increased. The residual stress is found to be compressive near the center of the deposited wall and tensile at the free edges, which is consistent with the published experimental results in the literature. Similar stress distributions are obtained for both scanning strategies with higher stress concentration at the free edges of the interface between the substrate and the first layer. In these regions, the use of H13 substrate results in a higher stress accumulation than the Cu substrate.

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Kabir, I. R., D. Yin, and S. Naher. "3D thermal model of laser surface glazing for H13 tool steel." In PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF GLOBAL NETWORK FOR INNOVATIVE TECHNOLOGY AND AWAM INTERNATIONAL CONFERENCE IN CIVIL ENGINEERING (IGNITE-AICCE’17): Sustainable Technology And Practice For Infrastructure and Community Resilience. Author(s), 2017. http://dx.doi.org/10.1063/1.5008152.

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Outeiro, José C., Domenico Umbrello, José C. Pina, and Stefania Rizzuti. "Modelling of Tool Wear and Residual Stress during Machining of AISI H13 Tool Steel." In MATERIALS PROCESSING AND DESIGN; Modeling, Simulation and Applications; NUMIFORM '07; Proceedings of the 9th International Conference on Numerical Methods in Industrial Forming Processes. AIP, 2007. http://dx.doi.org/10.1063/1.2740966.

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Ding, Hongtao, Ninggang Shen, and Yung C. Shin. "Experimental and Modeling Analysis of Micro-Milling of Hardened H13 Tool Steel." In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50244.

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This study is focused on experimental evaluation and numerical modeling of micro-milling of hardened H13 tool steels. Multiple tool wear tests are performed in a micro side cutting condition with 100 μm diameter endmills. The machined surface integrity, part dimension control, size effect and tool wear progression in micromachining of hardened tool steels are experimentally investigated. A strain gradient plasticity model is developed for micromachining of hardened H13 tool steel. Novel 2D FE models are developed in software ABAQUS to simulate the continuous chip formation with varying chip thickness in complete micro-milling cycles under two configurations: micro slotting and micro side cutting. The steady-state cutting temperature is investigated by a heat transfer analysis of multi micro-milling cycles. The FE model with the material strain gradient plasticity is validated by comparing the model predictions of the specific cutting forces with the measured data. The FE model results are discussed in chip formation, stress, temperature, and velocity fields to great details. It is shown that the developed FE model is capable of modeling a continuous chip formation in a complete micro-milling cycle, including the size effect. It is also shown that built-up edge in micromachining can be predicted with the FE model.

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He, Xiuli, and Jyoti Mazumer. "Liquid thermal cycle during double-track laser cladding of H13 tool steel." In ICALEO® 2007: 26th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Laser Institute of America, 2007. http://dx.doi.org/10.2351/1.5061208.

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Li, W., and Y. B. Guo. "The Effects of PVD Coated Tool Flank Wear and Process Parameters on Surface Integrity in Hard Milling AISI H13 Steel." In STLE/ASME 2010 International Joint Tribology Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ijtc2010-41216.

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Interfacial friction between cutting tool and work material leads to tool wear during machining, which adversely affects surface integrity of machined components. In addition, more energy is expected to be consumed to accommodate higher loading during machining. Dimensional accuracy and repeatability of the workpiece is also hard to guarantee when machining with worn tools. In this paper, surface integrity of AISI H13 samples milled using the PVD coated inserts is studied. Three levels of tool flank wear (VB = 0, 0.1mm, 0.2mm) were used to cut H13 tool steel in the experiment. At each level of flank wear, the effects of cutting speed, feed, and radial depth-of-cut on surface integrity were investigated respectively. Under a diverse combination of milling parameters, the evolution of surface integrity with tool flank wear was analyzed. A novel on-line optical tool inspection system integrated with CNC machining center was used to inspect the evolution of flank wear with milling time in order to monitor tool wear conditions.

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Li, W., and Y. B. Guo. "Residual Stress and Fatigue Properties of AISI H13 Steel by Sustainable Dry Milling." In ASME 2012 International Manufacturing Science and Engineering Conference collocated with the 40th North American Manufacturing Research Conference and in participation with the International Conference on Tribology Materials and Processing. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/msec2012-7363.

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Dry machining is a cluster of sustainable manufacturing processes to eliminate the negative environmental effect of machining coolants. It is critical to ensure that product quality cannot be sacrificed for achieving sustainability. The progress of tool flank wear during hard milling adversely affects surface integrity and, therefore, fatigue life of machined components. This paper focuses on the influence of tool flank wear on residual stress and fatigue properties in dry end milling AISI H13 tool steel (50 ± 1 HRC) using PVD coated tools. The effects of flank wear (VB = 0, 0.1, and 0.2 mm) on residual stresses at three different feeds were studied. Four-point bending fatigue tests were performed on the samples machined at five levels of tool flank wears (VB = 0, 0.05, 0.10, 0.15, 0.20 mm) and surface fatigue initiations of the fatigued samples were identified by the fractographic method.

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Hua, Y., and J. Choi. "Feedback control effects on dimensions and defects of H13 tool steel by DMD process." In ICALEO® 2003: 22nd International Congress on Laser Materials Processing and Laser Microfabrication. Laser Institute of America, 2003. http://dx.doi.org/10.2351/1.5060000.

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He, Xiuli, and Jyoti Mazumder. "Heat transfer and fluid flow during double-track laser cladding of H13 tool steel." In PICALO 2008: 3rd Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication. Laser Institute of America, 2008. http://dx.doi.org/10.2351/1.5057039.

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Reports on the topic "H13 tool steel"

Nandwana, Peeyush, Desarae Goldsby, Derek Siddel, Rangasayee Kannan, and James Sears. Binder Jet Printing of H13 Tool Steel. Office of Scientific and Technical Information (OSTI), July 2021. http://dx.doi.org/10.2172/1810015.

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