摘要
利用Gleeble-2000热模拟试验机研究了含硼及不含硼试验钢在900～1100℃,应变速率在0.1～10 s-1条件下的高温变形行为,分析含硼及不含硼试验钢的应力-应变曲线,用回归法确定了双曲线本构方程中的变形激活能及材料常数,确定了两种试验钢在峰值应力条件下的变形激活能分别为351和347 kJ/mol,最后回归了试验钢峰值应变及Z参数关系式。
The hot deformation behaviors of boron-containied and boron-free steels were investigated with a compression test on Gleeble-2000 simulator at the temperature range of 900-1100 ℃ and strain rate range of 0.1-10 s-1. Stress-strain curves of the boron-contained and boron- free steels were analyzed, the regression method was adopted to determine the activation energy and material parameters in the hyperbolic sine constitutive equation. The determined activation energy is 351 and 347 k J/ml for the boron-free steel and boron-contained steel in the peak stress, respectively. Hot deformation equations of the test steels were determined by regression method, also a equation related to the Zener- Hollomon parameter and peak strain was obtained.
出处
《金属热处理》
CAS
CSCD
北大核心
2013年第5期53-55,共3页
Heat Treatment of Metals
基金
国家高技术研究发展计划(863计划)(2006AA03Z529)
关键词
含硼及不含硼钢
热变形
动态再结晶
双曲线本构方程
boron-contained and boron-free steels
hot deformation
dynamic recrystallization
hyperbolic sine constitutive equation
