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Academic literature on the topic 'Vanadium microalloyed steels'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Vanadium microalloyed steels"

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Li, Zhongyi, Delu Liu, Jianping Zhang, and Wenhuai Tian. "Precipitates in Nb and Nb–V Microalloyed X80 Pipeline Steel." Microscopy and Microanalysis 19, S5 (August 2013): 62–65. http://dx.doi.org/10.1017/s1431927613012348.

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AbstractPrecipitates in two X80 pipeline steels were studied by transmission electron microscopy equipped with an energy filtering system. The steels are microalloyed with niobium and niobium–vanadium (Nb–V), respectively, and produced by continuous hot rolling. Besides the precipitates TiN and (Ti, Nb) (C, N), which were 10–100 nm in size, a large number of precipitates smaller than 10 nm distributed in the two steels have been observed. In the Nb–V microalloyed steel, only a few titanium nitrides covered by vanadium compounds on the surface have been observed. It is inferred that the vanadium exists mainly in the matrix as a solid solution element. The fact has been accepted that there was no contribution to the precipitation strengthening of the X80 steel by adding 0.04–0.06% vanadium under the present production process. By contrast, the toughness of the Nb–V steel is deteriorated. Therefore, a better toughness property of the Nb microalloyed X80 results from the optimum microalloying composition design and the suitable accelerating cooling after hot rolling.

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Hernandez, D., Beatriz López, and J. M. Rodriguez-Ibabe. "Ferrite Grain Size Refinement in Vanadium Microalloyed Structural Steels." Materials Science Forum 500-501 (November 2005): 411–18. http://dx.doi.org/10.4028/www.scientific.net/msf.500-501.411.

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The addition of small quantities of vanadium in structural steels produces a significant refinement in the final ferrite microstructure. There are two different mechanisms contributing to refinement: enhancement of grain boundary ferrite nucleation and intragranular nucleation. The contribution of each mechanism depends on the vanadium content and heat treatment of the steel. In this study the contribution of both refining mechanisms has been evaluated for two V-microalloyed steels subjected to different heat treatments. The results confirm that this refinement is based on the enhancement of ferrite nucleation through particle-stimulated nucleation mechanisms, while other aspects, as the influence of vanadium slowing down the austenite-ferrite transformation kinetics, seem to exert a minor effect.

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Mohar Ali Bepari, Md, Md Nizamul Haque, and Kazi Md Shorowordi. "The Structure and Properties of Carburized and Hardened Vanadium Microalloyed Steels." Advanced Materials Research 83-86 (December 2009): 1270–81. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.1270.

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Three 0.15% carbon steel samples containing small additions of vanadium and nitrogen singly or in combination have been carburized in a natural Titas gas atmosphere at a temperature of 9500C and a pressure of about 15 psia for time periods ranging from 1 to 5 hours and quenched in 10% brine from the carburizing temperature of 9500C after pre-cooling to 8600C in the furnace followed by tempering at a low temperature of 1600C. The structure and properties of the carburized and heat treated specimens were studied systematically by optical microscopy, surface hardness and microhardness measurements, X-ray diffractometry and impact tests. It was found that vanadium without nitrogen does not have any effect in the formation of retained austenite while vanadium with nitrogen is effective in promoting the formation of retained austenite in the case of carburized and hardened steels. It was also found that vanadium alone and vanadium with nitrogen refine the martensite platelets (needles) in the case of carburized and hardened steels, vanadium with nitrogen being more effective. Microhardness measurements have shown that vanadium improves the case hardness and the core hardness values; vanadium with nitrogen is more effective than vanadium alone in increasing the case hardness and the core hardness. The hardenability is found to increase with the increase of austenite grain size and with the extent of carbon penetration of the case of carburized steels. Vanadium as vanadium carbide, VC are detrimental to toughness and vanadium as vanadium carbonitride, V(C, N) are beneficial to toughness of the core of low carbon steels in carburized and hardened condition.

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Raj, A., B. Goswami, S. B. Kumar, and A. K. Ray. "Forge and Heat-treatments in Microalloyed Steels – A Review." High Temperature Materials and Processes 32, no. 6 (December 1, 2013): 517–31. http://dx.doi.org/10.1515/htmp-2012-0178.

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AbstractImproved designs, mostly for lightweight component manufacturer, have been made for improvement of forging and heat-treatment techniques. Low temperature precipitation strengthening and resistance to austenite grain size coarsening at reheat temperature for forging have been property improvement technique in these microalloyed steels. Studies of peak strain and flow stress at 1123–1423 K have shown increase in peak strain, peak stress and increment in mean flow stress in austenite phases in presence of vanadium. Partial vanadium alloying (1 part V substitute for 2 parts Mo) by substituting molybdenum has improved hardenability properties of conventional steels. Ultrafine grained steels have shown strain hardening effects from severe deformation by equal channel angular pressing (ECAP) followed by annealing. The strain induced precipitation of nano-metric sizes have pinned dislocations for strain hardening. Estimation of remaining life for reactor components have been done by simulated experiments under similar conditions as the service exposure. Vanadium in ferritic stainless steel has shown competitive performance, e.g. chloride environment. This has shown equivalent effects like nickel. In welding of microalloyed steel inter-critical grain coarsened heat affected zone (IC GC HAZ) has martensite austenite (M-A) blisters to yield poorest toughness.

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Siwecki, Tadeusz, Johan Eliasson, Rune Lagneborg, and Bevis Hutchinson. "Vanadium Microalloyed Bainitic Hot Strip Steels." ISIJ International 50, no. 5 (2010): 760–67. http://dx.doi.org/10.2355/isijinternational.50.760.

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Rezende, A. B., F. M. Fernandes, S. T. Fonseca, P. F. S. Farina, H. Goldenstein, and Paulo Roberto Mei. "Effect of Alloy Elements in Time Temperature Transformation Diagrams of Railway Wheels." Defect and Diffusion Forum 400 (March 2020): 11–20. http://dx.doi.org/10.4028/www.scientific.net/ddf.400.11.

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The Heavy-Haul railroad wheels started to use higher wear resistance steels microalloyed with niobium, vanadium, and molybdenum [1]. During continuous cooling, these elements depress the temperature of the pearlite formation, producing smaller interlamellar spacing that increases the hardness of the steel, besides to favor the precipitation hardening through the formation of carbides [2, 3]. Also, they delay the formation of difusional components like pearlite and bainite during isothermal transformation. The effects of these alloy elements on microstructure during isothermal transformation were studied in this work using a Bähr 805A/D dilatometer. Three different compositions of class C railway wheels steels (two microalloyed and one, non microalloyed) were analyzed in temperatures between 200 and 700 °C. The microstructure and hardness for each isothermal treatment were obtained after the experiments. Comparing with non microalloyed steel (7C), the vanadium addition (7V steel) did not affect the beginning of diffusion-controlled reactions (pearlite and bainite), but delayed the end of these reactions, and showed separated bays for pearlite and bainite. The Nb + Mo addition delayed the beginning and the ending of pearlite and bainite formation and also showed distinct bays for them. The delays in diffusion-controlled reactions were more intense in the 7NbMo steel than in 7V steel. The V or Nb + Mo additions decreased the start temperature for martensite formation and increased the start temperature for austenite formation.

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Smirnov, L. A., A. V. Kushnarev, A. B. Dobuzhskaya, A. A. Kirichkov, and E. V. Belokurova. "Transport Steels Microalloyed with Vanadium and Nitrogen." Steel in Translation 50, no. 6 (June 2020): 407–14. http://dx.doi.org/10.3103/s0967091220060078.

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Speer, J. G., J. R. Michael, and S. S. Hansen. "Carbonitride precipitation in niobium/vanadium microalloyed steels." Metallurgical Transactions A 18, no. 2 (February 1987): 211–22. http://dx.doi.org/10.1007/bf02825702.

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Speer, J. G., J. R. Michael, and S. S. Hansen. "Carbonitride precipitation in niobium/vanadium microalloyed steels." Metallurgical Transactions A 18, no. 3 (February 1987): 211–22. http://dx.doi.org/10.1007/bf02646155.

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Hu, Fang Zhong, Wei Jun Hui, and Qi Long Yong. "High-Cycle Fatigue Fracture Behavior of Microalloyed Bainitic Steels for Hot Forging." Advanced Materials Research 634-638 (January 2013): 1746–51. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.1746.

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High-cycle fatigue fracture behavior of microalloyed bainitic steels with three different carbon and vanadium contents were studied using rotating-bending fatigue test and compared with the ferrite-pearlite type microalloyed steel F38MnVS. The results indicated that the fatigue properties of the microaIloyed bainitic steels had a significant relation to the microstructures in forging condition. Compared with the ferrite-pearlite type microalloyed steel F38MnVS, the bainitic steels possessed higher fatigue strength and lower fatigue limit ratio σ-1/Rm. It was found that the bainitic transformation temperature was decreased and the hardness of the bainitic ferrite was enhanced, at the same time, the fatigue strength was increased, however, the fatigue limit ratio was lower. Furthermore, according to the SEM images of the fracture surface of fatigue specimens, it was revealed that the fatigue cracks mainly initiated along the bainitic ferrite laths in the specimen surface and preferred to propagate along the length direction of laths.

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Dissertations / Theses on the topic "Vanadium microalloyed steels"

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Li, Yu. "Effect of aluminium and vanadium on the microstructure and properties of microalloyed steels." Thesis, University of Strathclyde, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366804.

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Wang, Kai. "A study of HSLA steels microalloyed with vanadium and titanium during simulated controlled rollling [i.e. rolling] cycles." Thesis, University of Canterbury. Mechanical Engineering, 2003. http://hdl.handle.net/10092/7521.

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Thermomechanical treatments involving recrystallisation controlled rolling process of hot rolling strip mills were simulated in a Gleeble-1500 testing machine. Five vanadium and one vanadium-titanium microalloyed HSLA steels were used for these simulations. Specimens of vanadium steels were heated to 1170°C to simulate slab reheating, prior to a 50% upset reduction at 1060°C, The specimens were then cooled rapidly to the simulated coiling temperatures of 950°C to 600°C and held for half an hour then air cooled to room temperature. Nitrogen analysis established that the maximum volume fraction of VN coincided with the minimum ferrite grain size at a simulated coiling temperature of 700°C. The resultant ferrite grain size indicated that the VN precipitated in the ferrite restricted the ferrite grain growth. The maximum VN precipitation that was observed at this temperature was considered to be a function of the vanadium diffusion in the ferrite and the temperature at which the austenite to ferrite transformation is completed. Quenched specimens following deformation at 1060°C showed that strain induced VN precipitation was detected when the equilibrium solubility product calculations predicted the formation of VN. The measured VN precipitation based upon nitrogen analysis, was less than that predicted. Comparison of detected VN at coiling temperatures of 600°C to 950°C for specimens subjected to 50% deformation at 1060°C with specimens without deformation showed that the deformation increased the VN precipitation. Using the experimentally determined ferrite grain size, volume fraction and mean particle size of the precipitated VN, the corresponding yield strength has been calculated for the range of coiling temperatures examined. These calculated yield strengths lie within the range determined experimentally on similar vanadium micro alloyed HSLA steels. The reheating behaviour of the vanadium-titanium steel was investigated by quenching specimens from 900°C to 1500°C after holding for half an hour at the respective temperatures. Insoluble nitrogen analysis indicated that VN completely dissolved below 1100°C and TiN started to dissolve in austenite at approximately 1300°C. The measured insoluble nitrogen content indicated the existence of TixV₁-xN. The measurement of size distribution of precipitates showed that the dissolution of precipitates of less than 10 nm resulted in abnormal austenite grain growth. It was thought that the results for AIN detected using the Beeghly method [Beeghly49, United Steel 62] were influenced by dissolution of the finer sized VN and TiN precipitates. This was because the detected AIN was in excess of that calculated from the equilibrium solubility for the remaining nitrogen content based upon the measured acid insoluble nitrogen content being combined as TiN. The nitrogen content detected as being associated with AIN was greater than that detected as the acid soluble nitrogen content that is defined as the total amount of nitrogen in the form of aluminium nitride, iron nitrides and interstitial nitrogen. X-ray diffraction of residues separated from specimens reheated at 900°C and 1350°C using 17% v/v dilute sulphuric acid showed that VN and TiN precipitates were present in the specimen reheated at 900°C, while there was only TiN detected at 1350°C, Precipitates extracted from reheated specimens using carbon replicas were identified using a convergent beam electron diffraction method. The indexing of dual spot diffraction patterns established that VN had precipitated on the surfaces of existing TiN precipitates with the same crystal orientation as the initial TiN. These dual spot diffraction patterns were not observed in specimens reheated above 11OO°C. The thermomechanical treatment of a vanadium-titanium steel in hot rolling strip mills was simulated using the Gleeble-1500 testing machine. The rolling was simulated by carrying out four passes each of 20% deformation on specimens at finish rolling temperatures of 1050°C to 850°C. An additional experiment involved a final deformation that varied from 10% to 30% for a finish rolling temperature of 1000°C. For all these finish rolling simulations, the specimens were rapidly cooled to a range of temperatures between 750°C and 600°C. The rapid cooling occurred at a rate of 10°C/s and having reached the simulated coiling temperature the specimens were subsequently slow cooled to represent the thermal behaviour in the coil. Insoluble nitrogen analysis showed that the quantity of nitrides decreased with the decreasing coiling temperature. While the finish rolling temperature and deformation percentage had no measurable effect on the final insoluble nitrogen content after coiling, the size of precipitates decreased with the decreasing coiling temperature and with increasing percentages of deformation. The final ferrite grain size decreased with the decreasing finish rolling temperature and with increasing percentages of deformation. The average ferrite grain size of specimens subjected to 30% final deformation at 1000°C, coiled at 750°C, 700°C, 650°C and 600°C was less than 10 µm. Finish rolling at 1000°C, 950°C and 900°C in the austenite recrystallisation region with four passes each of 20% deformation also achieved a fine ferrite grain size of under 10 µm provided that the coiling was performed at temperatures of 650°C or less. Interphase precipitation with the planar or non-planar morphologies was not observed in the thin foils or carbon replicas from the specimens subjected to the simulated thermomechanical treatments for the steels containing either vanadium, or the combination of vanadium and titanium. The observed precipitates in the ferrite phase in these steels were distributed on dislocations, within the ferrite and on the ferrite grain boundaries. The calculations based on the Hall-Petch equation showed that the lower yield strength for the specimens subjected to 20% and 30% deformation respectively at a finish rolling temperature of 1000°C and coiled at 750°C, 700°C, 650°C and 600°C increased as the coiling temperature decreased from 750°C to 600°C. The lower yield strength for specimens subjected to 30% final deformation was higher than that for 20% and the maximum lower yield strength occurred at the coiling temperature of 600°C for both 20% and 30% final deformations. The present experimental results showed that with appropriate coiling temperatures and a accelerated cooling rate the recrystallisation controlled rolling process for vanadium and vanadium-titanium steels can be used to produce a hot strip steel with a fine ferrite grain size of less than 10 µm. This means that the 70% to 80% deformation at around 800°C in the low temperature controlled rolling process was not necessary to obtain a fine ferrite grain size. Thus a fine grained strip steel can be produced in the existing hot strip rolling mills without exceeding the load limitation of a strip rolling equipment.

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Phaniraj, M. P. "Modeling Constitutive Behavior And Hot Rolling Of Steels." Thesis, Indian Institute of Science, 2004. http://hdl.handle.net/2005/206.

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Constitutive behavior models for steels are typically semi-empirical, however recently neural network is also being used. Existing neural network models are highly complex with a large network structure i.e. the number of neurons and layers. Furthermore, the network structure is different for different grades of steel. In the present study a simple neural network structure, 3:4:1, is developed which models flow behavior better than other models available in literature. Using this neural network structure constitutive behavior of 8 steels: 4 carbon steels, V and V-Ti microalloyed steels, an austenitic stainless steel and a high speed steel could be modeled with reasonable accuracy. The stress-strain behavior for the vanadium microalloyed steel was obtained from hot compression tests carried out at 850-1150 ï°C and 0.1-60 s-1. It is found that a better estimate of the constants in the semi-empirical model developed for this steel could be obtained by simultaneous nonlinear regression. A model that can predict the effect of chemical composition on the constitutive behavior would be industrially useful for e.g., in optimizing rolling schedules for new grades of steel. In the present study, a neural network model, 5:6:1, is developed which predicts the flow behavior for a range of carbon steels. It is found that the effect of manganese is best accounted for by taking Ceq=C+Mn/6 as one of the inputs of the network. Predictions from this model show that the effect of carbon on flow stress is nonlinear. The hot strip mill at Jindal Vijaynagar Steel Ltd., Toranagallu, Karnataka, India, was simulated for calculating the rolling loads, finish rolling temperature (FRT) and microstructure evolution. DEFORM-2d a commercial finite element package was used to simulate deformation and heat transfer in the rolling mill. The simulation was carried out for 18 strips of 2-4 mm thickness with compositions in the range and 0.025-0.139 %C. The rolling loads and FRT could be calculated within ï±15 % and ï±15 ï°C respectively. Analysis based on the variation in the roll diameter, roll gap and the effect of roll flattening and temperature of the roll showed that an error of ï±6 % is inherent in the prediction of loads. Simulation results indicated that strain induced transformation to ferrite occurred in the finishing mill. The microstructure after rolling was validated against experimental data for ferrite microstructure and mechanical properties. The mechanical properties of steels with predominantly ferrite microstructures depend on the prior austenite grain size, strain retained before transformation and cooling rate on the run-out table. A parametric study based on experimental data available in literature showed that a variation in cooling rate by a factor of two on the run-out table gives rise to only a ï±20 MPa variation in the mechanical properties.

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Villegas, Randolfo. "Genèse de la ferrite aciculaire dans les aciers à moyen carbone microalliés au vanadium. Morphologie fractale en relation avec les propriétés mécaniques." Thesis, Vandoeuvre-les-Nancy, INPL, 2007. http://www.theses.fr/2007INPL086N/document.

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Des nuances d’aciers à moyen carbone, microalliés au vanadium, ont été élaborées avec l’objectif d’obtenir de nouvelles microstructures, majoritairement constituées de ferrite aciculaire (FA). Le contrôle de la composition chimique (0.1-0.3 % V) et la vitesse de refroidissement (2.0 °Cs-1) conduit à des fractions de FA atteignant 80 %. Un paramètre empirique, le pouvoir ferritisant, P, a été introduit pour évaluer l’effet combiné de la composition chimique et de la vitesse de refroidissement sur la fraction de FA. Les caractérisations par MEB et MET montrent que la FA se développe à partir de la ferrite proeutectoïde recouvrant les inclusions de MnS. Une précipitation interphase de carbonitrures de vanadium, V(C,N), serait à l’origine d’un appauvrissement local en carbone de la matrice austénitique autour des aiguilles de FA, favorisant une germination autocatalytique. Le caractère fractal de la FA a été mis en évidence par des caractérisations morphologiques. Les dimensions fractales, D, et les longueurs de coupure ont été déterminées par la méthode de comptage de boîtes à partir d’images MEB. Des essais mécaniques isothermes-quasistatiques révèlent des propriétés mécaniques équivalentes à celles des microstructures bainitiques. Les courbes contrainte-déformation montrent un comportement mécanique de type Hollomon. Les structures de ces aciers présentent des taux de consolidation qui augmentent avec l’accroissement de la fraction de FA. Une corrélation entre les propriétés mécaniques et la dimension fractale a été établie. Ce lien s’exprime par des relations de type exponentiel : [delta]M = c exp [[alpha](D -2)] où M représente? les propriétés mécaniques (Re, Rm, etc.) et c? et ?[alpha] des constantes
Medium carbon vanadium microalloyed steels have been developed to obtain new microstructures, mainly formed of acicular ferrite (AF). Controlling the chemical composition and (0.1-0.3 % V) and the cooling rates (2.0 °Cs-1) lead to AF fractions up to 80 %. An empirical parameter, the ferritisant power, P, has been introduced to evaluate the combined effect of chemical composition and cooling conditions. Scanning (SEM) and transmission (TEM) electron microscopy investigations indicate that AF develops from proeutectoid ferrite enveloping MnS inclusions. An interphase precipitation of vanadium carbo-nitrides, V(C,N) has been identified. It is suggested that this precipitation is at the origin of carbon depletion in the austenitic matrix surrounding the AF plates. The formation of the AF is then enhanced by an autocatalytic effect. The fractal nature of AF has been determined by SEM and TEM characterisations. Fractal dimensions, D, and cut off lengths have been derived by the counting box method applied to SEM images. Mechanical tests conducted in isothermal and quasistatic conditions reveal that mechanical properties of AF are of the same grade of that of bainitic microstructures. Experimental strain-stress curves are described by the Hollomon law. The work hardening of the studied microstructures increases with the AF fraction. The mechanical properties have been linked to the fractal dimension by the following exponential relation : [delta]M = c exp [[alpha] (D -2)], where M represents the mechanical property (Re, Rm, etc.) and c and [alpha] are constants parameters

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Zuno-Silva, Jorge. "Microstructural Evolution of a Multiphase Steel Microalloyed with Vanadium." Thesis, University of Sheffield, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511998.

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Books on the topic "Vanadium microalloyed steels"

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Barnes, Stuart. The machining characteristics of vanadium microalloyed forging steels. Birmingham: Universityof Birmingham, 1987.

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Book chapters on the topic "Vanadium microalloyed steels"

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Hutchinson, Bevis, Jacek Komenda, and David Martin. "Vanadium Microalloyed High Strength Martensitic Steel Sheet For Hot-Dip Coating." In HSLA Steels 2015, Microalloying 2015 & Offshore Engineering Steels 2015, 533–40. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119223399.ch64.

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Hutchinson, Bevis, Jacek Komenda, and David Martin. "Vanadium Microalloyed High Strength Martensitic Steel Sheet for Hot-Dip Coating." In HSLA Steels 2015, Microalloying 2015 & Offshore Engineering Steels 2015, 535–40. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48767-0_64.

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Hernandez, D., Beatriz López, and J. M. Rodriguez-Ibabe. "Ferrite Grain Size Refinement in Vanadium Microalloyed Structural Steels." In Materials Science Forum, 411–18. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-981-4.411.

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Ma, Jiangnan, Ruizhen Wang, and Caifu Yang. "Influence of Nitrogen Addition on Transformation Behavior and Mechanical Properties of Vanadium Microalloyed Steels." In HSLA Steels 2015, Microalloying 2015 & Offshore Engineering Steels 2015, 1163–69. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119223399.ch145.

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Ma, Jiangnan, Ruizhen Wang, and Caifu Yang. "Influence of Nitrogen Addition on Transformation Behavior and Mechanical Properties of Vanadium Microalloyed Steels." In HSLA Steels 2015, Microalloying 2015 & Offshore Engineering Steels 2015, 1163–69. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48767-0_145.

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Li, Yu, and T. N. Baker. "Vanadium Microalloyed Steel for Thin Slab Casting and Direct Rolling." In Materials Science Forum, 237–44. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-981-4.237.

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Panfilova, Lyudmila M., Leonid A. Smirnov, and Peter S. Mitchell. "The Unique Features of Reinforcing Steel Microalloyed with Nitrogen and Vanadium." In Materials Science Forum, 511–18. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-981-4.511.

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Acevedo Reyes, Daniel, Michel Perez, Stéphane Pecoraro, Alain Vincent, Thierry Epicier, and Pierre Dierickx. "Vanadium Carbide Dissolution during Austenitisation of a Model Microalloyed FeCV Steel." In Materials Science Forum, 695–702. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-981-4.695.

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Gómez, M., S. F. Medina, and J. I. Chaves. "Static Recrystallization of Austenite in a Medium-Carbon Vanadium Microalloyed Steel and Inhibition by Strain-Induced Precipitates." In Materials Science Forum, 417–22. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-434-0.417.

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"Precipitation in vanadium and vanadium-titanium microalloyed steels." In Electron Microscopy and Analysis 2001, 201–4. CRC Press, 2001. http://dx.doi.org/10.1201/9781482289510-49.

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Conference papers on the topic "Vanadium microalloyed steels"

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L. A., Smirnov, and Panfilova L. M. Panfilova. "Vanadium-nitrogen-microalloyed Structural Highstrength Steels Having Nanostructure." In Nanomaterials and Technologies – VI. Buryat State University Publishing Department, 2016. http://dx.doi.org/10.18101/978-5-9793-0883-8-71-77.

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Aloi, Nicholas E., Michael E. Burnett, and Robin Kendrick. "Optimizing Forgings for Automotive Transmission Hubs by Warm Forming Vanadium-Microalloyed Steels." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1997. http://dx.doi.org/10.4271/970517.

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Felker, C., J. Speer, G. Liu, and E. Moor. "Interphase Precipitation in a Low-Carbon, Titanium-Molybdenum-Vanadium Microalloyed Steel." In MS&T18. MS&T18, 2018. http://dx.doi.org/10.7449/2018mst/2018/mst_2018_1166_1173.

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Felker, C., J. Speer, G. Liu, and E. Moor. "Interphase Precipitation in a Low-Carbon, Titanium-Molybdenum-Vanadium Microalloyed Steel." In MS&T18. MS&T18, 2018. http://dx.doi.org/10.7449/2018/mst_2018_1166_1173.

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Baker, K. C., R. M. Thompson, and T. C. Gorrell. "Mechanical Properties of Vanadium Microalloyed High-Strength ASTM A694 Forgings." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65803.

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Recent upstream oil and gas industry experience has raised attention to substandard properties with high strength carbon steel forgings manufactured to the requirements of ASTM A694 and MSS-SP-44. As part of an internal investigation into quality of commodity pipeline flanges, three flanges certified as ASTM A694 grade F60 to F70, were purchased off-the-shelf from three different manufacturers for microstructural and mechanical property investigation. All three flanges were supplied with material test certificates indicating acceptable material properties. Tensile and Charpy impact specimens were extracted from various locations and orientations in each flange. All three flanges failed to meet yield strength requirements for the specified grade. The impact energy and shear area values were well below those reported on the material test certificates. The discrepancy between the sacrificial testing results and the material test certificates is attributed to the use of separately forged test blocks for quality testing instead of integral prolongations or a sacrificial production part, which is permitted by ASTM A694 and MSS-SP-44. Further investigation was made into the chemical composition and heat treating practices. The chemical composition can be characterized as high strength, low alloy steel (HSLA) by virtue of 0.05–0.08 wt. pct. vanadium added to a carbon-manganese steel with CE(IIW) ranging from 0.43 to 0.45. Advanced microscopy showed that the morphology of the vanadium precipitates was inadequate as a strengthener and deleterious to Charpy impact properties for the size of the flanges and the heat treatment practices applied.

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Lonsdale, Cameron, Steven Dedmon, Jay Galbraith, and James Pilch. "Recent Research to Improve Wheel and Axle Composition, Properties and Designs." In ASME 2007 Rail Transportation Division Fall Technical Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/rtdf2007-46008.

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This paper describes research efforts by a North American railroad wheel and axle manufacturer to improve steel chemistry, cleanliness, and properties for improved component service performance. The authors describe extensive work to improve steel cleanliness in the melting process. Also they review attempts to correlate ultrasonic testing data with microcleanliness test results, and detail subsequent work to determine steel cleanliness using the Advanced Steel Cleanliness Assessment Technique (ASCAT), which is being developed by a university and a supplier. Emphasis is placed on determining the type, number and size of discontinuities within the steel. Additionally, efforts to improve mechanical properties of microalloyed axles are reviewed along with microstructural details relevant to the work. The role of vanadium, molybdenum, aluminum, and other elements, on axle structure and properties is discussed. A new axle design, with significantly larger body diameter, is described and finite element analysis (FEA) results for the design are presented.

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Feng, C., Y. Cai-fu, and S. Zhong-ran. "Effect of Nitrogen Content on the Microstructures and Mechanical Properties in Simulated CGHAZ of Normalized Vanadium Microalloyed Steel." In MS&T18. MS&T18, 2018. http://dx.doi.org/10.7449/2018mst/2018/mst_2018_1240_1247.

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Feng, C., Y. Cai-fu, and S. Zhong-ran. "Effect of Nitrogen Content on the Microstructures and Mechanical Properties in Simulated CGHAZ of Normalized Vanadium Microalloyed Steel." In MS&T18. MS&T18, 2018. http://dx.doi.org/10.7449/2018/mst_2018_1240_1247.

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Reports on the topic "Vanadium microalloyed steels"

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Aihara, Isseki, Yuuichi Yamada, Tomonoi Miyazawa, Jun Yoshida, Goro Anan, and Hiroshi Itojiri. Apply Half Vanadium Microalloyed Steel to a Part for Engine. Warrendale, PA: SAE International, September 2005. http://dx.doi.org/10.4271/2005-08-0529.

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