张锦文,王文先,高建兵,成生伟,王育田,王之香,赵志刚

• 1:太原理工大学材料科学与工程学院
• 2:山西太钢不锈钢股份有限公司技术中心

摘要(Abstract)：

采用Gleeble-3800型热模拟机研究了DZ2高速车轴钢在应变速率0.01～10 s~(-1)、温度900～1150℃时的热压缩变形行为,分析了热压缩变形时该钢的流变应力、变形温度及应变速率之间的关系,通过线性回归确定了其流变应力本构方程,建立了其在不同应变下的热加工图。结果表明:DZ2车轴钢在高温热压缩时流变应力随变形温度的减小而增大,随应变速率的升高而增大。当应变速率等于0.01 s~(-1)时,DZ2车轴钢的流变应力曲线表现为动态再结晶特征。DZ2车轴钢的热变形激活能为356.64 kJ·mol~(-1)。在低温高应变速率区(温度为950～1020℃,应变速率为1～5 s~(-1))以及高温低应变速率区(温度为1050～1150℃,应变速率为<1 s~(-1))这2个区域为变形安全区,适合DZ2高速车轴钢进行热加工。

关键词(KeyWords)： 高铁车轴;DZ2车轴钢;本构模型;热加工图

Abstract:

Keywords:

基金项目(Foundation): “十三五”国家重点研发计划:苛刻环境下铁路车辆关键部件用钢(2017YFB0304600)

作者(Author): 张锦文,王文先,高建兵,成生伟,王育田,王之香,赵志刚

DOI: 10.13289/j.issn.1009-6264.2020-0174

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