李娜娜,刘江林,张威,王涛,赵利平.轧制态254SMo超级奥氏体不锈钢的热变形行为及本构方程[J].稀有金属材料与工程,2020,49(8):2712~2717.[Li Nana,Liu Jianglin,Zhang Wei,Wang Tao,Zhao Liping.Hot deformation behavior and constitutive equation analysis of rolled 254SMo super austenitic stainless steel[J].Rare Metal Materials and Engineering,2020,49(8):2712~2717.]
轧制态254SMo超级奥氏体不锈钢的热变形行为及本构方程
投稿时间:2019-07-11  修订日期:2019-07-19
中文关键词:  254SMo超级奥氏体不锈钢  热压缩  本构方程
基金项目:国家自然科学基金青年项目(51804215),山西省科技重大专项(20181102015),太原市科技重大专项(170203)
中文摘要:
      为优化后续轧制工艺,利用Gleeble-3800热力模拟机,对轧制态254SMo超级奥氏体不锈钢进行等温恒应变速率压缩试验,研究了254SMo超级奥氏体不锈钢在变形温度为900~1100℃,应变速率为0.005~5 s-1的热变形行为及微观组织演变。结果表明,随着变形温度升高及应变速率降低,峰值应力减小,且流变曲线的单峰特征变得明显,说明高温低应变速率下254SMo容易发生动态再结晶;三种形式的Arrhenius本构方程预测精度对比显示,指数形式的精度最高,相关系数达97.496%,变形激活能为546 kJ/mol。
Hot deformation behavior and constitutive equation analysis of rolled 254SMo super austenitic stainless steel
英文关键词:254SMo super austenitic stainless steel  isothermal compression  constitutive equation  
英文摘要:
      In order to optimize the subsequent rolling process, the Gleeble-3800 thermal simulator was used to test the isothermal constant strain rate compression of the as-rolled 254SMo super austenitic stainless steel. The thermal deformation behavior and microstructure evolution of 254SMo in the temperature range of 900-1100℃ under the strain rates of 0.005-5 s-1 was studied. The results show that the peak stress reduces with the deformation temperature increasing and the strain rate decreasing, the single peak characteristic of flow curves become obvious, which indicates that 254SMo is prone to dynamic recrystallization under high temperature and low strain rate;three forms of Arrhenius The prediction accuracy comparison of the three forms of Arrhenius constitutive equations shows that the exponential form has the highest accuracy, the correlation coefficient is 97.496%, and the deformation activation energy is 546 kJ/mol.
作者单位E-mail
李娜娜 太原理工大学 机械与运载工程学院 529115095@qq.com 
刘江林 太原理工大学 机械与运载工程学院  
张威 山西太钢不锈钢股份有限公司技术中心  
王涛 太原理工大学 机械与运载工程学院  
赵利平 太原理工大学 机械与运载工程学院  
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