Behavior of Dynamic Recrystallization of Austenite in V Microalloying Non-Quenched-Tempered Steel 48MnVS

Special Steel ›› 2016, Vol. 37 ›› Issue (5): 62-65.

Special Issue: 汽车用微合金钢

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Behavior of Dynamic Recrystallization of Austenite in V Microalloying Non-Quenched-Tempered Steel 48MnVS

Zhou Zhan¹ , Cheng Yong¹ , Zhou Zhiwei¹ , Man Tinghui² , Xu Haifeng^2,3 , Bao Yaozong²

1. Suxin Special Steel, Jiangsu Susteel Group, Suzhou 215151 ；
2. Institute for Special Steels, Central Iron and Steel Research Institute, Beijing 100081 ；
3. College of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074;

Received:2016-05-16 Online:2016-10-01 Published:2022-08-05

钒微合金化非调质钢48MnVS的奥氏体动态再结晶行为

周湛¹，程勇¹，周志伟¹，满廷慧²，徐海峰^2,3，包耀宗²

1. 江苏苏钢集团苏信特钢，苏州 215151 ；
2. 钢铁研究总院特殊钢研究所，北京 100081 ；
3. 华中科技大学材料科学与工程学院，武汉 430074;

作者简介:周湛(1963-)，男，硕士(2006年大连理工大学)，高级工程师，1996年大连理工大学(本科)毕业，材料检测和材料工程研究。
基金资助:
国际钒技术委员会(Vanitec)合作项目资助(V137)

Abstract

Abstract: The tested non-quenched-tenipered steel 48MnVS (/% ： 0.48C, 0.60Si, 1.50Mn, 0.35Cr, 0.14V, 0.05S, 0.020Al, 0.0150N) is melted by an 100t EAF, cast to 280 min x 360 mm bloom and rolled to Φ100 mm bar products. The recrystallization precess of austenite in vanadium microalloying non-quenched-tempered steel 48MnVS singlepass compressed with defonnation 60% and deformation rale 0.1-10 s^-1 temperature at 950-1150℃ is studied by using a Gleeble-3800 thermal simulation tests machine lo gel true stress-true strain curves, and the dynamic recrystallization grain size model and the dynamic recrystallization slate diagram in tested sleel are obtained by calculation. Results show that with higher deformation temperature ant lower deformation rate, the stored energy of deformation for occurring dynamic recrystallization is lower therefore dynamic recrystallization of vtuiadium microalloying non-quenched-tempered steel 48MnVS occurs more easily. The activation energy Q_d for dynamic recrystallization of tested steel 48MnVS is 343.202 kJ/mol.

Key words: V Microalloying Non-Quenched-Tempered Steel 48MnVS, Dynamic Recrystallization, Grain Size of Austenite

摘要： 实验用非调质钢48MnVS（/%:0.48C,0.60Si,1.50Mn,0.35Cr,0.14V,0.05S,0.020Al,0.0150N）由100t EAF冶炼,连铸成280 mm×360 mm坯,轧成Φ100 mm棒材。通过Gleeble-3800热模拟实验机研究了变形温度950~1150℃,变形速率0.1~10 s^-1,变形量60%的单道次压缩钒微合金非调质钢48MnVS的奥氏体再结晶过程得出真应力-应变曲线,计算得出实验钢的动态再结晶晶粒尺寸模型和动态再结晶状态图。结果表明,钒微合金化非调质钢48MnVS变形温度越高,变形速率越低,则发生动态再结晶的形变储能越小,越容易发生动态再结晶。实验钢48MnVS的动态再结晶激活能为Q_d=343.202 kJ/mol。

关键词: V微合金化非调质钢48MnVS, 动态再结晶, 奥氏体晶粒尺寸

Zhou Zhan , Cheng Yong , Zhou Zhiwei , Man Tinghui , Xu Haifeng , Bao Yaozong. Behavior of Dynamic Recrystallization of Austenite in V Microalloying Non-Quenched-Tempered Steel 48MnVS[J]. Special Steel, 2016, 37(5): 62-65.

周湛, 程勇, 周志伟, 满廷慧, 徐海峰, 包耀宗. 钒微合金化非调质钢48MnVS的奥氏体动态再结晶行为[J]. 特殊钢, 2016, 37(5): 62-65.

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Behavior of Dynamic Recrystallization of Austenite in V Microalloying Non-Quenched-Tempered Steel 48MnVS

钒微合金化非调质钢48MnVS的奥氏体动态再结晶行为

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