摘要
采用JMatPro 7.0对22MnB5高强钢的热平衡相组成、等温奥氏体化曲线(TTA)、过冷奥氏体连续转变曲线(CCT)、淬透性预测和淬火后的力学性能进行了数值计算,并对22MnB5高强钢进行了高温淬火试验。计算结果表明:22MnB5高强钢的相转变温度A_(c1)为713.9℃,A_(c3)为812.0℃,M_(s)为401℃,M_(f)为290℃;22MnB5钢在连续加热过程中加热速率越快,奥氏体化程度越高且均匀化时间越短;钢在连续冷却过程中,其屈服强度、抗拉强度和硬度均随冷却速度的增大而增大,当冷却速度为100℃/s时,硬度、屈服强度和抗拉强度分别达到其最大值481.1HV0.1、1261 MPa和1507.9 MPa。22MnB5高强钢经高温热处理后冷水浴淬火试验,获得的组织、硬度、屈服强度和抗拉强度与JMatPro计算结果一致。
The thermal equilibrium phase composition,isothermal austenitizing curve(TTA),subcooled austenitic continuous transformation curve(CCT),hardenability prediction and mechanical properties after quenching of 22MnB5 high strength steel were calculated by JMatPro 7.0.The results show that the phase transition temperature of 22MnB5 high strength steel is A_(c1)=713.9℃,A_(c3)=812.0℃,M_(s)=401℃,M_(f)=290℃.The faster the heating rate of 22MnB5 steel in the continuous heating process,the higher the degree of austenitization and the shorter the homogenization time.In the process of continuous cooling,the yield strength,tensile strength and hardness of steel increase with the increase of cooling speed.When the cooling speed is 100℃/s,the hardness,yield strength and tensile strength reach their maximum values of 481.1HV0.1,1261 MPa and 1507.9 MPa respectively.The microstructure,hardness,yield strength and tensile strength of 22MnB5 high strength steel obtained by heat treatment at high temperature and quenching with cold water bath are consistent with the calculated results.
作者
李治国
娄国栋
LI Zhiguo;LOU Guodong(Shenyang University of Chemical Technology,Shenyang 110142,China)
出处
《焊管》
2023年第12期34-39,共6页
Welded Pipe and Tube
基金
国家自然科学基金面上项目“基于薄带连铸的高性能微纳米晶钢非平衡组织调控及其增强增塑机理”(项目编号51974085)。
