加热工艺对含Ti奥氏体不锈钢组织性能的影响  

Effect of heating process on microstructure and properties of Ti-containing austenitic stainless steel

作　　者：邢梦楠 欧阳鑫 胡昕明[1,2] 刘晨希 白云峰[1,2] 王勇 XING Mengnan;OUYANG Xin;HU Xinming;LIU Chenxi;BAI Yunfeng;WANG Yong(State Key Laboratory of Metal Materials and Their Applications for Marine Equipment,Anshan 114009,China;Ansteel Green Resources Technology Company Limited,Anshan 114009,China)

机构地区：[1]海洋装备用金属材料及其应用国家重点实验室,辽宁鞍山114009 [2]鞍钢股份有限公司,辽宁鞍山114009

出　　处：《轧钢》2025年第1期57-64,共8页Steel Rolling

摘　　要：为进一步优化含Ti奥氏体不锈钢加热工艺,利用Gleeble 3800热模拟试验机,研究了含Ti奥氏体不锈钢不同应变速率和变形温度下的高温热变形行为,并利用金相显微镜、扫描电镜、透射电镜、ZWICK 600拉伸试验机、ZBC 2602冲击试验机和BRIN 400D布氏硬度仪等设备,分析了固溶热处理工艺对钢板组织形貌和力学性能的影响。结果表明:对连铸坯在加热过程中不同位置处温度变化规律进行数值模拟研究,得出加热过程中连铸坯的上表面中心处最容易产生热裂纹;分析含Ti奥氏体不锈钢的动态再结晶行为可知,其变形抗力与变形温度呈近似直线关系;在1080~1150℃、保温15~120min系列固溶热处理工艺下,随着固溶温度的升高和保温时间的延长,含Ti奥氏体不锈钢晶粒粗化,其平均晶粒尺寸与保温时间呈幂函数关系,与固溶温度符合指数函数关系;在1050℃、保温时间1min/mm固溶热处理工艺下,含Ti奥氏体不锈钢奥氏体晶粒度为4~6级,综合力学性能优异。To further optimize the heating process of Ti-containing austenitic stainless steel,the influence of strain rate and deformation temperature on its high temperature deformation behavior was investigated by Gleeble 3800thermal simulation testing machine.The influence of solution heat treatment process on the microstructure and mechanical properties of the plate was analyzed by metallographic microscope,scanning electron microscope,transmission electron microscope,ZWICK 600tensile testing machine,ZBC 2602impact testing machine and BRIN 400Dhardness tester.The results show that the crack is most likely to occur in the center of the upper surface of the continuous casting billet during the heating process through the numerical simulation study of the temperature change law at different positions.The dynamic recrystallization behavior analysis shows that the deformation resistance and deformation temperature of Ti-containing austenitic stainless steel are approximately linear.Under the series solution heat treatment process of 1080-1150℃and holding 15-120min,the grain size of Ti-containing austenitic stainless steel is coarsened with the increase of solution temperature and holding time,and the average grain size has a power function relationship with holding time and an exponential function relationship with solid solution temperature.At the solution heat treatment process of 1050℃and 1min/mm holding time,austenite grain size of Ti-containing austenitic stainless steel is 4-6grade,and the comprehensive mechanical properties are excellent.

关 键 词：加热工艺 含Ti奥氏体不锈钢 固溶热处理 组织性能 

分 类 号：TG1[金属学及工艺—金属学]