王林,王晓辉,刘振宝,刘键恒,王奔驰,周晓龙

• 1:昆明理工大学材料科学与工程学院
• 2:钢铁研究总院特殊钢研究院
• 3:南京理工大学材料科学与工程学院

摘要(Abstract)：

为了获得00Cr12Ni11Mo1Ti2高强度不锈钢热加工图，优化其热加工工艺参数，采用Gleeble-3800型热模拟试验机，在变形温度为850～1150℃,应变速率为0.01～10 s~(-1)的条件下对试验钢进行了热压缩试验，研究了其热变形行为。构建了试验钢在峰值流变应力下的本构方程，并且基于动态材料模型构建了能量耗散图，并分别采用Prasad和Murthy两种失稳判据构建了试验钢的塑性失稳图。结果表明：00Cr12Ni11Mo1Ti2钢在能量耗散率低于0.3的变形区间内同样可以发生动态再结晶，在应变速率为1.0～10 s~(-1),变形温度为850～1000℃的区间内，试验钢仅发生了部分动态再结晶且伴有大量的局部变形带产生，与Murthy准则预测的塑性失稳区更加吻合；在变形温度为1050～1150℃,应变速率为0.01～10.0 s~(-1)的区间内试验钢具有最佳的热加工性能，可获得细小均匀的原奥氏体晶粒组织。

关键词(KeyWords)： 高强度不锈钢;本构方程;局部变形带;热加工图;塑性失稳

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 王林,王晓辉,刘振宝,刘键恒,王奔驰,周晓龙

DOI: 10.13289/j.issn.1009-6264.2022-0534

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