周璟,张建斌,季根顺,樊丁

• 1:甘肃省有色金属新材料省部共建国家重点实验室
• 2:兰州理工大学
• 3:有色金属合金及加工教育部重点实验室
• 4:兰州理工大学

摘要(Abstract)：

采用热/力模拟实验方法研究了409L铁素体不锈钢(409LFSS)在950～1150℃、应变速率为0.05～2.5s-1条件下的热变形及组织变化,讨论了热变形参数对流变应力和显微组织的影响。结果表明,409L铁素体不锈钢的表观应力指数及热变形表观激活能分别为4.45、262kJ/mol;其热变形方程为ε=5.347×1011[sinh(α·σp)]4.45exp(-262000/RT);该钢的铁素体软化机制与Z参数有关,且随着Z值从2.09×108增加到3.92×1011,热变形峰值应力相应从13.73MPa增加到65.08MPa。

关键词(KeyWords)： 铁素体不锈钢;热变形方程;流变应力;激活能

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 周璟,张建斌,季根顺,樊丁

DOI: 10.13289/j.issn.1009-6264.2010.09.011

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