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.