奥氏体逆相变退火温度对含铜中锰钢组织和性能的影响  

Influence of austenite reverse transformation annealing temperature on microstructure and properties of Cu-containing medium manganese steel

作　　者：张盛豪 王宝 李思佳[1,2] 肖美美 周建安 Zhang Shenghao;Wang Bao;Li Sijia;Xiao Meimei;Zhou Jian'an(The Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan Hubei 430081,China;Hubei Provincial Key Laboratory for Advanced Ironmaking and Steelmaking Processes,Wuhan University of Science and Technology,Wuhan Hubei 430081,China)

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081 [2]武汉科技大学钢铁冶金新工艺湖北省重点实验室,湖北武汉430081

出　　处：《金属热处理》2025年第2期96-101,共6页Heat Treatment of Metals

基　　金：钢铁冶金及资源利用省部共建教育部重点实验室基金(FMRUlab202318)。

摘　　要：采用扫描电镜、EBSD、X射线衍射仪以及透射电镜研究了奥氏体逆相变退火温度对0.30C-5.21Mn-0.34Cu中锰钢微观组织演变、力学性能和变形行为的影响。结果表明,试验钢退火后主要的室温组织为残留奥氏体、铁素体和马氏体,随着退火温度的升高,残留奥氏体的含量先增大后急剧下降,700℃时最高为20.38%。随着退火温度的升高,试验钢的抗拉强度和屈服强度呈现相反的变化规律;而伸长率和强塑积先增加后降低,和残留奥氏体体积分数的变化规律基本一致。试验钢在700℃退火60 min后,综合力学性能最优,抗拉强度、伸长率和强塑积分别达到1004 MPa、54.80%和55.02 GPa·%。Influence of austenite reverse transformation annealing temperature on microstructure evolution,mechanical properties and deformation behavior of 0.30C-5.21Mn-0.34Cu medium manganese steel was studied by means of SEM,EBSD,XRD and TEM.The results show that the microstructure of the steel after annealing is mainly composed of ferrite,retained austenite and martensite.As the annealing temperature increases,the content of retained austenite first increases and then sharply decreases,reaching a maximum of 20.38%at 700℃.As the annealing temperature increases,the tensile strength and yield strength of the tested steel show opposite changes.While the elongation and product of strength and elongation first increase and then decrease,which is basically consistent with the variation law of retained austenite volume fraction.When annealed at 700℃for 60 min,the comprehensive mechanical properties of the tested steel are the best,with tensile strength,elongation,and product of strength and elongation reaching 1004 MPa,54.80%,and 55.02 GPa·%,respectively.

关 键 词：含铜中锰钢 奥氏体逆相变退火 组织演变 残留奥氏体 加工硬化 

分 类 号：TG441.8[金属学及工艺—焊接]