钼对铌钛微合金钢高温变形行为的影响
Effect of Mo on High Temperature Deformation Behavior of Nb-Ti Microalloyed Steels
摘 要
利用MMS-300型热模拟试验机对铌钛和铌钛钼两种微合金钢进行了单道次压缩试验, 研究了两种钢的热变形行为, 分析了微合金元素钼和不同变形条件对其动态再结晶的影响, 得到了两种钢的动态再结晶激活能和变形抗力模型。结果表明: 随着变形温度(800~1 150 ℃)的降低和应变速率(0.1~10 s-1)的升高, 试验钢的变形抗力升高; 添加微合金元素钼后, 试验钢的变形抗力增大, 动态再结晶激活能增大, 动态再结晶被抑制, 变形温度对变形抗力的影响增大。
铌钛微合金钢
动态再结晶
变形抗力模型
molybdenum
Nb-Ti microalloyed steel
dynamic recrystallization
model for deformation resistance
Abstract
Single compression tests were carried out for Nb-Ti and Nb-Ti-Mo microalloyed steels by using MMS-300 thermal simulation tester. The hot deformation behavior of the steels and the effects of Mo and deformation conditions on dynamic recrystallization had been studied. The dynamic recrystallization activation energy and the models for deformation resistance of the steels were obtained. The results show that the deformation resistance of the tested steel increased with the deformation temperature decreasing (800~1 150 ℃) and strain rate increasing (0.1~10 s-1). Microalloying element Mo addition produced a increase for deformation resistance and recrystallization activation energy, a retardation for dynamic recrystallzation, and the effect of deformation temperature on deformation resistance increased.
中图分类号 TG142.3
所属栏目 物理模拟与数值模拟
基金项目 国家自然科学基金资助项目(51104046); 中央高校基本科研业务费资助项目(N090307001)
收稿日期 2011/11/12
修改稿日期 2012/8/7
网络出版日期
作者单位点击查看
备注徐洋(1984-), 男, 山东淄博人, 博士研究生。
引用该论文: XU Yang,YI Hai-long,LIU Zhen-yu,WANG Guo-dong. Effect of Mo on High Temperature Deformation Behavior of Nb-Ti Microalloyed Steels[J]. Materials for mechancial engineering, 2012, 36(11): 109～112
徐洋,衣海龙,刘振宇,王国栋. 钼对铌钛微合金钢高温变形行为的影响[J]. 机械工程材料, 2012, 36(11): 109～112
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【3】李靖, 赵德文, 刘相华.Q420钢热变形行为及流变应力模型研究[J]. 东北大学学报:自然燃科学版, 2010, 31(2):202-206.
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【5】MEDINA S F, HERNADEZ C A. General expression of Zener-Hollomon parameter as a function of chemical composition of low alloy and microalloyed steel[J]. Acta Mater, 1996, 44(1):137-148.
【6】HODGSON P D, GIBBS R K. A mathematical model to predict the mechanical properties of hot rolled C-Mn and microalloyed steels[J]. ISIJ International, 1992, 32(12):1329-1338.
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【9】周纪华, 管克智.金属塑性变形抗力[M]. 北京:机械工业出版社, 1987:212.
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