摘要
研究了0.1%C-3%Mn中锰钢的热膨胀模拟相变行为和一步法与二步法ART处理对其显微组织和力学性能的影响。结果表明,二步法ART处理比一步法可产生更多的残留奥氏体,可显著改善钢的成型性能。将实验钢的热轧态试样在740℃预处理后再在660℃~680℃进行ART处理能产生12%~14%的残留奥氏体,使钢的总延伸率高于35%,均匀延伸率高于20%。热处理制度为740℃×0.5 h+670℃×1.0 h的试样具有最佳的综合性能,其屈服强度为470 MPa,抗拉强度为680 MPa,总延伸率为40.7%,均匀延伸率高达25%,冲击吸收功为163 J。
The phase transition behavior of 0.1%C-3%Mn medium manganese steel was studied via thermal simulation with L78RITA automatic phase transformation instrument,meanwhile the effect of onestep and two-step austenite reverted transformation(ART)treatment on the microstructure and mechanical properties of the steel were also investigated.The results show that the two-step ART treatment produces more residual austenite than the one-step ART treatment,which can significantly improve the forming property of the steel.The hot rolled steel samples were pretreated at 740℃and then heated to different temperatures for ART treatment,and it was found that 12%~14%of the retained austenite could be produced after treatment in temperature range of 660℃~680℃,which made the total elongation higher than 35%and the uniform elongation higher than 20%of the steel respectively.The steel heat treated in conditions of 740℃×0.5 h+670℃×1.0 h has the best comprehensive properties,namely the yield strength is 470 MPa,the tensile strength is 680 MPa,the total elongation is 40.7%,the uniform elongation is up to25%,and the impact absorption energy is 163 J.
作者
周永浪
王官涛
王立军
刘春明
ZHOU Yonglang;WANG Guantao;WANG Lijun;LIU Chunming(School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China)
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2022年第5期343-352,共10页
Chinese Journal of Materials Research
基金
国家自然科学基金(51571053)。
关键词
金属材料
中锰钢
二步法ART处理
显微组织
力学性能
残留奥氏体
metallic materials
medium manganese steel
two-step ART treatment
microstructure
mechanical properties
retained austenite
作者简介
周永浪,男,1995年生,硕士生;通讯作者:王立军,副教授,lijunwang@mail.neu.edu.cn,研究方向为先进钢铁结构材料。
