镍含量对国产化高铁车轴钢组织和性能的影响  

Effect of Nickel Content on Microstructure and Properties of Domestic High-Speed Railway Axle Steel

作　　者：王之香[1] 高建兵[1] 王玉玲[1] 王育田 张锦文[1] Wang Zhixiang;Gao Jianbing;Wang Yuling;Wang Yutian;Zhang Jinwen(Technology Center,Shangxi Taigang Stainless Steel Co Ltd,Taiyuan 030003)

机构地区：[1]山西太钢不锈钢股份有限公司技术中心,太原030003

出　　处：《特殊钢》2021年第2期64-67,共4页Special Steel

基　　金：国家重点研发计划资助项目(2017YFB0304603)“高寒地区用高韧性耐疲劳高速车轴钢关键制造与应用技术”。

摘　　要：采用金相显微镜(Metallographic)和扫描电镜(SEM)等研究了0.20%、0.80%和1.20%Ni高铁车轴钢DZ1和DZ2性能和组织结构。结果表明,随着Ni含量由0.20%增至1.20%,钢的抗拉强度由710 MPa提高到759 MPa、屈服强度由535 MPa提高到608 MPa;钢的20℃和-40℃冲击韧性均得到提升,特别是-40℃横向冲击韧性从0.20%Ni的87 J提高到1.20%Ni的136 J,-40℃纵向冲击功从94 J提高到179 J;钢的韧脆转变温度由-30℃降低到-100℃;3种成分的高铁车轴钢均可得到贝氏体+回火马氏体组织,贝氏体量随着镍含量的提高而增加,并且镍含量提高后钢的组织更加细小、均匀。The propertes and microtructure of high-speed axle steel DZ1 and DZ2 with Ni contents 0.20%,0.80%and 1.20%are studied by using metalloraphic microscope and SEM etc.The results show that with Ni content increasing from 0.20%to 1.20%,the tensile strength and yield strength of the steel increases respectively from 710 MPa to 759 MPa and from 535 MPa to 608 MPa;the impact toughness of steel at 20℃,and-40℃impact toughness is inproved,especially at-40℃,the transvese impact energy of steel increases from 87 J of 0.20%Ni contents to 136 J of 1.20%Ni contents and the longitudinal impact energy of steel increases from 94 J to 179 J;the temperature of steel’s tough-brittle transition decreases from-30℃to-100℃.The high-speed railway axle steel structure of 3 kinds of composition is Bainite+tempered martensite structure,and the bainite volume increases with the increase of Ni content,and steel microstructure became finer and more uniform after the increase of Ni content.

关 键 词：高铁 车轴钢 Ni含量 韧脆转变温度 贝氏体+回火马氏体 

分 类 号：TG142.1[一般工业技术—材料科学与工程] U270.33[金属学及工艺—金属材料]