刘利刚,李强,郭婧,孙艳亮,杨昱东,梁从涛,杨庆祥

• 1:亚稳材料制备技术与国家重点实验室燕山大学材料科学与工程学院
• 2:中钢集团邢台机械轧辊有限公司

摘要(Abstract)：

采用Gleeble-3500热模拟试验机对一种新型冷轧工作辊用高速钢进行了热压缩变形试验,研究了该钢在900～1150℃、应变速率为0.01～10 s-1条件下的动态再结晶行为,测量了该钢的应力-应变曲线并观察了其典型的微观组织,建立了Z参数表达式、热变形方程、峰值应力和峰值应变与Z参数的关系及动态再结晶模型图。结果表明:冷轧工作辊用高速钢的应力-应变曲线表现为动态再结晶型;其热变形激活能为541.4 kJ/mol;峰值应力、峰值应变与Z参数近似成指数关系;随着Z参数的增大,发生动态再结晶的临界应变εp和发生完全再结晶的应变εs均增加。

关键词(KeyWords)： 高速钢;热变形;应力应变曲线;动态再结晶;冷轧工作辊

Abstract:

Keywords:

基金项目(Foundation): 中钢集团邢台机械轧辊有限公司博士后项目

作者(Author): 刘利刚,李强,郭婧,孙艳亮,杨昱东,梁从涛,杨庆祥

DOI: 10.13289/j.issn.1009-6264.2012.08.027

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