1.3（Si+Al）无取向电工钢热变形行为研究（新）
Hot deformation behavior of 1.3%（Si+Al） Non-Oriented Electrical Steel（新）
高鹏飞
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作者单位：北京科技大学材料科学与工程学院；钢铁研究总院结构材料研究所
中文关键字：无取向电工钢，热变形，流变应力，两相区，变形激活能
英文关键字：non-oriented electrical steel, hot deformation, flow stress, two-phase region, deformation activation energy
中文摘要：使用Gleeble-1500热力模拟机，在750~1100℃温度范围和0.1s-1~10s-1应变速率条件下进行单道次压缩，研究了1.3%（Si+Al）无取向电工钢的热变形行为，并通过对试验结果的回归分析得到了试验钢铁素体区、两相区、奥氏体区的热变形激活能和热变形方程。结果表明，在相同应变速率及变形程度下，试验钢在750℃至960℃和1020℃至1100℃温度范围内，变形抗力随着温度的升高逐渐下降；在960℃至1020℃温度范围内，变形抗力随着温度的升高逐渐上升。试验钢铁素体区和奥氏体区的热变形激活能分别为410.0kJ/mol和287.2kJ/mol，两相区变形激活能随变形温度的上升而下降，可构造成温度的线性函数。
英文摘要：The hot deformation behavior of 1.3%(Si+Al) non-oriented electrical steel was investigated by the one-hit hot compression test at 750~1100℃ and strain rate of 0.1s-1~10s-1 on Gleeble1500. And based on the regression analysis of test results, the hot deformation activation energy and the hot deformation equation of the experimental steel at ferrite region, two-phase region and austenitic region were determined. The results show that the deformation resistance of experimental steel decreases with the increasing of deformation temperature in the ranges of 750℃~960℃ and 1020℃~1100℃, and increases with the increasing of deformation temperature in the range of 960℃~1020℃. The hot deformation activation energy in the ferrite region and austenitic region of experimental steel are 410.0kJ/mol and 287.2kJ/mol respectively. In the two-phase region, the hot deformation activation energy decreases with the increasing of deformation temperature. It can be constructed as a linear function of deformation temperature.