孙红英,周张健,黄恬,王曼

• 1:北京科技大学材料科学与工程学院
• 2:安阳钢铁集团公司技术中心

摘要(Abstract)：

通过Gleeble-1500热模拟机上的高温压缩实验(温度800~1100℃;应变速率范围0.1~10 s-1),研究了Fe-Cr-Ni超级奥氏体不锈钢的高温热变形行为。显微组织观察表明,在高温大应变速率条件下,可获得细小的再结晶晶粒;再结晶晶粒尺寸与参数Z呈指数关系。此外,通过对实验数据的计算和线性回归,分别得到试验钢的热激活能(为466.14 kJ/mol)、热变形的本构方程、不同温度与应变速率下的峰值应力和Zener-Hollomon(Z)参数,其中,峰值应力和发生动态再结晶的临界应力与参数Z呈线性关系。

关键词(KeyWords)： 奥氏体不锈钢;动态再结晶;热变形;峰值应力;晶粒尺寸

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础发展计划资助项目(2007CB209800)

作者(Author): 孙红英,周张健,黄恬,王曼

DOI: 10.13289/j.issn.1009-6264.2013.09.022

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