摘要
利用Gleeble-1500型热模拟试验机研究了S460ML钢在变形温度为900～1200℃及应变速率为0．1—5．0s-1条件下的动态再结晶行为，通过加工硬化率和应变的关系曲线确定了不同条件下发生动态再结晶的临界应变，讨论了动态再结晶临界应变和峰值应变的关系，并通过回归分析法建立了临界应变预测的数学模型。结果表明，S460ML钢在1000～1200℃及应变速率为0．1～5．0s-1时会发生动态再结晶现象，随着变形温度的升高和应变速率的降低，动态再结晶临界应变减小；动态再结晶临界应变和峰值应变呈线性关系。
The dynamic recrystallization behavior of S460ML steel was studied by means of Gleeble 1500 thermo-mechanical simulator at the deformation temperature ranging from 900 to 1 200 ℃ and strain rate from 0. 1 to 5.0 s-1. The critical stain of dynamic recrystallization under different ） conditions was determined by using the work hardening rate-strain curves. The relation between critical strain and peak strain of dynamic reerystallization was discussed. Furthermore, the mathematical model for predicting critical stain was established by means of regression analysis method. The results showed that dynamic recrystallization occurred at deformation temperature from 1 000 to 1 200 ℃ and strain rate from 0. 1 to 5.0 s-1. With the increase of deformation temperature and decrease of strain rate, the critical strain of dynamic recrystallization decreased. There was a linear relation between critical strain and peak strain.
出处
《首钢科技》
2016年第2期1-6,30,共7页
Shougang Science and Technology
关键词
动态再结晶
临界应变
预测模型
dynamic recrystallization, critical strain, prediction model
