摘要
采用Gleeble-3800,对铸态309L不锈钢在900~1100℃、0.01~10 s-1进行热压缩模拟,得到实验钢的热变形应力应变曲线、建立其相应的本构方程和热加工图。结果表明:309L不锈钢的流动应力,对其变形温度和应变速率更敏感;根据Arrhenius模型构建铸态309L不锈钢峰值应力下,相应的本构方程,计算得到其热变形激活能为353.27 kJ/mol;依据相应的变形曲线,绘制本实验钢的热加工图,得出当温度处于1050~1100℃、应变速率在0.01~0.05 s-1时和温度在1030~1100℃、应变速率在3.1~10 s-1时,309L不锈钢具有最佳的工艺,有良好的热加工性能。
Gleeble-3800 was used to simulate the hot compression of as-cast 309L stainless steel at 900~1100℃and 0.01~10 s-1.The stress-strain curve of the experimental steel was obtained,and the corresponding constitutive equation and hot working diagram were established.The flow stress of 309L stainless steel is more sensitive to its deformation temperature and strain rate.According to Arrhenius model,the corresponding constitutive equation of 309L stainless steel under the peak stress of as-cast 309L stainless steel is established,and the activation energy of thermal deformation is 353.27 kJ/mol.According to the corresponding deformation curve,the hot working diagram of the experimental steel is drawn.When the temperature is 1050~1100℃,the strain rate is 0.01~0.05 s-1 and the temperature is 1030~1100℃,the strain rate is 3.1~10 s-1,309L stainless steel has the best process and good hot working performance.
作者
宋耀辉
李玉贵
王顺
张健
李华英
SONG Yao-hui;LI Yu-gui;WANG Shun;ZHANG Jian;LI Hua-ying(Engineering Research Center Heavy Machinery Ministry of Education,Taiyuan University of Science and Technology,Taiyuan 030024,China)
出处
《重型机械》
2020年第5期75-79,共5页
Heavy Machinery
基金
山西省青年科学基金(201801D2211120)
山西省重点研究开发项目(201703D111003)
山西省科技重大项目(20181101015)
太原科技大学科研启动资金(20172014)项目
山西省优秀博士学位基金项目(20182061)
山西省高等学校科技创新计划(2019L0622)。
关键词
309L不锈钢
热变形
本构方程
热加工图
309L stainless steel
thermal deformation
constitutive equation
heat processing diagram