T90高碳帘线钢加热过程奥氏体晶粒长大规律与数学模型  

Growing rule and mathematical model of austenite grain in T90 high carbon cord steel

作　　者：张连有 赵卓 车安 李灵敏 周艳文[1] 陈雪娇[1] 谢世绵 吕哲 Zhang Lianyou;Zhao Zhuo;Che An;Li Lingmin;Zhou Yanwen;Chen Xuejiao;Xie Shimian;LüZhe(School of Materials Science and Metallurgy,University of Science and Technology Liaoning,Anshan Liaoning 114051,China;Anshan Steel Wire Factory,Anshan Liaoning 114042,China)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051 [2]鞍钢股份线材厂,辽宁鞍山114042

出　　处：《金属热处理》2023年第8期118-123,共6页Heat Treatment of Metals

基　　金：省教育厅项目(LJKZ0306);国家重点实验室项目(HGSKL-USTLN(2021)05);辽宁科技大学大学生创新创业训练计划。

摘　　要：利用高温激光共聚焦显微镜(HT-CLSM)研究T90高碳帘线钢在不同加热温度(950~1200℃)和不同保温时间(0~600 s)下奥氏体晶粒长大行为,以及不同加热温度对高碳帘线钢T90微观组织的影响。结果表明,同一加热温度下,随着保温时间的延长,晶粒平均尺寸增大,但在1150℃和1200℃时晶粒长大速率相对较快,在1050℃和1100℃时生长速率相对缓慢,加热温度最好控制在1050~1100℃。保温时间相同时,随着加热温度的升高,奥氏体晶粒逐渐长大,1000℃时晶粒开始粗化;随着加热温度的升高,晶粒相互吞并长大,最终推导出T90钢奥氏体长大动力学方程。Growth behavior of austenite grains in high carbon wire steel T90 heated at different temperatures(950-1200℃)and time(0-600 s)was investigated by high temperature laser confocal microscope,and the effect of different holding temperatures on the microstructure and mechanical properties of the T90 steel was studied.The results show that,at the same heating temperature,the average grain size increases with the prolongation of holding time,but the growth rate is relatively faster between 1150℃and 1200℃and relatively slower between 1050℃and 1100℃.Therefore,the heating temperature should be preferably controlled between 1050℃and 1100℃.At the same holding time,with the increase of heating temperature,the austenite grains gradually grow,and grain coarsening begins at 1000℃.With the increase of heating temperature,the grains merge and grow.Finally,the kinetic equation for the growth of austenite in the T90 steel is obtained.

关 键 词：T90高碳帘线钢 奥氏体 动力学方程 晶粒长大 

分 类 号：TG156.1[金属学及工艺—热处理]