热处理工艺对高铁耐蚀60Si2Mn弹簧钢组织和性能的影响  

Influence of heat treatment process on microstructure and mechanical properties of corrosion resistant 60Si2Mn spring steel for high-speed railway

作　　者：李金波 吴红艳[1] 高秀华[1] 陈红卫 李绍杰 朱子颖 杜林秀[1] Li Jinbo;Wu Hongyan;Gao Xiuhua;Chen Hongwei;Li Shaojie;Zhu Ziying;Du Linxiu(State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang Liaoning 110819,China;Hansteel Company,HBIS Group,Handan Hebei 056015,China;HBIS Group Technology Research Institute,Shijiazhuang Hebei 050023,China;Shisteel Company,HBIS Group,Shijiazhuang Hebei 050031,China)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819 [2]河钢集团邯钢公司,河北邯郸056015 [3]河钢集团技术研究院,河北石家庄050023 [4]河钢集团石钢公司,河北石家庄050031

出　　处：《金属热处理》2022年第8期135-140,共6页Heat Treatment of Metals

基　　金：国家高技术研究发展计划(863计划)(2015AA03A5001)。

摘　　要：在常规高铁弹条60Si2Mn弹簧钢基础上,通过添加Cr、Ni、Cu等耐蚀元素设计了耐蚀60Si2Mn弹簧钢,研究了热处理工艺对耐蚀弹簧钢显微组织、力学性能的影响规律,并评价了其耐蚀性能。结果表明,淬火+回火处理后耐蚀60Si2Mn钢显微组织为回火屈氏体,870℃保温45 min,油淬+440℃回火60 min处理后,耐蚀弹簧钢的综合力学性能最佳,屈服强度为1606 MPa,抗拉强度为1716 MPa,断后伸长率为5.3%,洛氏硬度为50.2 HRC。添加耐蚀元素的60Si2Mn钢耐蚀性较常规60Si2Mn钢得到较大提升。Corrosion resistant 60 Si2 Mn spring steel was designed by adding Cr, Ni, Cu elements on the basis of the conventional high-speed railway 60 Si2 Mn spring steel. The influence of heat treatment process on microstructure and mechanical properties of the corrosion resistant spring steel was studied, and its corrosion resistance was evaluated. The results show that the microstructure of corrosion resistant 60 Si2 Mn steel after quenching and tempering is tempered troostite. When heated at 870 ℃ for 45 min, oil quenched and tempered at 440 ℃ for 60 min, the comprehensive mechanical properties of the corrosion resistant spring steel are the best, with yield strength of 1606 MPa, tensile strength of 1716 MPa, elongation after fracture of 5.3% and Rockwell hardness of 50.2 HRC. The corrosion resistance of 60 Si2 Mn steel added with corrosion resistant elements is much higher than that of conventional 60 Si2 Mn steel.

关 键 词：耐蚀60Si2Mn弹簧钢 淬火温度 回火温度 组织 性能 

分 类 号：TG115[金属学及工艺—物理冶金]