Investigation on grain refinement and precipitation strengthening applied in high speed wire rod containing vanadium

Wu, Da-yong; Xiao, Furen; Wang, Bin; Jialing, Liu

doi:10.1016/j.msea.2013.10.068

Cited by 14 publications

(5 citation statements)

References 17 publications

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“…where d is the average diameter of the precipitate particles (nm) and, f is the volume fraction of the precipitated phase (%),which is obtained from f = f MC × ρ Fe ρ MC , and where f MC is the mass fraction of the precipitated phase (wt %), ρ Fe is the density of the α-Fe matrix, which is 7.875 g/cm 3 , and ρ MC is the theoretical density of the precipitated phase. Because the atomic weight of Cr is close to that of V, it was regarded as equivalent to V. The N content was negligible, the nominal formula of phase MC in the experimental steel was identified as VC, and the density of VC is 5.717 g/cm 3 .…”

Section: Strength and Hardnessmentioning

confidence: 99%

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Influence of Vanadium on the Microstructure and Mechanical Properties of Medium-Carbon Steels for Wheels

Wang

Lin

et al. 2018

Metals

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Steels used for high-speed train wheels require a combination of high strength, toughness, and wear resistance. In 0.54% C-0.9% Si wheel steel, the addition of 0.075 or 0.12 wt % V can refine grains and increase the ferrite content and toughness, although the influence on the microstructure and toughness is complex and poorly understood. We investigated the effect of 0.03, 0.12, and 0.23 wt % V on the microstructure and mechanical properties of medium-carbon steels (0.54% C-0.9% Si) for train wheels. As the V content increased, the precipitation strengthening increased, whereas the grain refinement initially increased, and then it remained unchanged. The increase in strength and hardness was mainly due to V(C,N) precipitation strengthening. Increasing the V content to 0.12 wt % refined the austenite grain size and pearlite block size, and increased the density of high-angle ferrite boundaries and ferrite volume fraction. The grain refinement improved the impact toughness. However, the impact toughness then reduced as the V content was increased to 0.23 wt %, because grain refinement did not further increase, whereas precipitation strengthening and ferrite hardening occurred.

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Section: Strength and Hardnessmentioning

confidence: 99%

“…The addition of V results in solution strengthening, precipitation strengthening, grain refinement, and hardening. Thus, V has an important effect on the toughness of steel [1][2][3]. Adding 0.1 wt % V to eutectoid steel can delay the pearlite transformation and effectively refine the pearlite colony size and interlamellar spacing [4].…”

Section: Introductionmentioning

confidence: 99%

Influence of Vanadium on the Microstructure and Mechanical Properties of Medium-Carbon Steels for Wheels

Wang

Lin

et al. 2018

Metals

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“…In the past 40 years, many research, development and production practices on steel have proved that the online accelerated cooling process is an important means to improve the mechanical properties of hot-rolled steels [1][2][3][4][5][6][7][8] . Online accelerated cooling equipments were used widely in the production of heavy plate, strip, bars, wires, H-beams and rail, which made the application of microalloying technology and TMCP possible [9][10][11][12][13][14][15][16][17] . Unlike the above products, the seamless steel pipes are hollow structures, making it difficult to develop equipment that can simultaneously cool the inner and outer surfaces of steel pipe.…”

Section: Introductionmentioning

confidence: 99%

A New Type of Online Accelerated Cooling Equipment for Seamless Steel Pipe and Its Application Experiments

Tao,

Liu

2024

ISIJ Int.

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A new type of online accelerated cooling equipment for seamless steel pipe and its application experiments were introduced in the present work. The equipment can simultaneously cool the inner and outer surface of seamless steel pipes. By using online accelerated cooling process, the mechanical properties of the test steel pipe made of Q345B composition meet the requirements of Q460E steel grade index, with the yield strength of 460~475MPa, the tensile strength of 601~603MPa, the elongation of 21.5~26.5%, and the -40℃impact energy of 136J.

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“…Therefore, such parameters help to design the optimum processing conditions for manufacturing steels with superior properties. For instance, CTT gives insights into processing temperatures, and they are practical tools for determining the desired cooling requirements [3]. Although computational methods can determine some parameters, data obtained by such practices must be reliable to get a positive outcome.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Effect of Heat Treatment on the Cold Forging of 27mnb4 Steel via Calphad Methodology and Fem

AKYILDIZ

Kutsal

ARSLAN>³

et al. 2023

Konya Journal of Engineering Sciences

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As a material forming method, cold forging is preferred due to the reasons like absence of a heating step and high surface quality. Recently, the finite element method (FEM) has received growing attention for controlling and predicting final material properties for cold forging applications. FEM combines microstructure evolution models with failure criteria, thus providing solutions to complicated problems in the modern cold forging industry. The fastener industry extensively utilizes cold forging, in which manganese and boron-containing steels like 27MnB4 can be formed to obtain high mechanical properties. The current study investigates the effect of two different heat treatments, namely softening and spheroidizing annealing, on the formability of 27MnB4 bolts. Softwares such as Thermo-Calc 2022a and Forge NxT 3.2 were used to predict the microstructure of the wire rod and evaluate the cold forming process of the same rod under two different heat treatment conditions. Therefore, the current study also provides a relationship between microstructural features and the cold formability of 27MnB4 steel. The microstructure of 27MnB4 is predicted by CCT diagrams. The predicted microstructure corresponds to the microstructure of 27MnB4 samples taken from the production line. In addition, temperature, von Mises stress, and equivalent strain distributions for 27MnB4 steel in the hot rolled state were calculated higher than in annealed states due to the differences in the microstructure. These results demonstrate that computational material engineering methods and simulation techniques could be practical tools for cold forming processes.

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Investigation on grain refinement and precipitation strengthening applied in high speed wire rod containing vanadium

Cited by 14 publications

References 17 publications

Influence of Vanadium on the Microstructure and Mechanical Properties of Medium-Carbon Steels for Wheels

Influence of Vanadium on the Microstructure and Mechanical Properties of Medium-Carbon Steels for Wheels

A New Type of Online Accelerated Cooling Equipment for Seamless Steel Pipe and Its Application Experiments

Investigating the Effect of Heat Treatment on the Cold Forging of 27mnb4 Steel via Calphad Methodology and Fem

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