利用Gleeble-3800热模拟试验机在温度为1040～1120℃,应变速率为1～20s-1的条件下进行了高N马氏体不锈轴承钢的热压缩变形试验.结合真应力-真应变曲线和热变形组织研究了变形参数对高N马氏体不锈轴承钢的热变形行为和碳氮化物演变规律的影响.结果表明:在该变形条件下,试验钢的真应力-真应变曲线为动态再结晶型.随着应变量的增大,碳化物的平均尺寸呈减小趋势,但数量有所增多.基于热变形方程计算得到的应变量为0.6时的热变形激活能Q为410.7 kJ/mol.构建了包含应变量在内的流变应力方程,同时建立了高N马氏体不锈轴承钢的Zener-Hollomon参数本构方程.
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