摘要
对比分析了锻态和调质态车轮钢的显微组织,研究了电渣重熔、合金元素Mn和Si对调质态车轮钢组织、力学性能和耐腐蚀性能的影响。结果表明:电渣重熔有助于锻态车轮钢中贝氏体组织的细化,但晶粒度会从非电渣重熔时的6级增大至电渣重熔时的3级,调质态A钢(电渣重熔)和B钢(非电渣重熔)的组织都为回火索氏体,晶粒度分别为6级和7级;调质态B钢的强度和布氏硬度高于调质态A钢,-40℃冲击吸收能和断后伸长率略低于调质态A钢;Mn质量分数从0.63%增加至1.06%或者Si质量分数从0.31%增加至0.69%,调质态车轮钢的强度和布氏硬度会增大、断后伸长率和-40℃冲击吸收能会有所减小,耐腐蚀性能增强。
The microstructure of forged and quenched-tempered wheel steels was compared and analyzed.The effects of electroslag remelting,alloying elements Mn and Si on the microstructure,mechanical properties and corrosion resistance of the quenched-tempered wheel steels were studied.The results showed that electroslag remelting(ESR)was helpful to refine bainite structure in the forged wheel steel,but the grain size increased from grade 6 in ESR to grade 3 in non ESR.The microstructure of quenched-tempered steel A(ESR)and steel B(non ESR)was tempered sorbite.The grain sizes of the quenched-tempered steel A and steel B were grade 6 and grade 7 respectively.Compared with the quenched-tempered steel A,the quenched-tempered steel B had higher strength and Brinell hardness,and slightly lower impact absorbed energy at-40℃and elongation.When the mass fraction of Mn increased from 0.63%to 1.06%or the mass fraction of Si increased from 0.31%to 0.69%,the strength,Brinell hardness and corrosion resistance of the quenched-tempered wheel steels increased,but the elongation and impact absorbed energy at-40℃decreased.
作者
杨艳
赵锦龙
YANG Yan;ZHAO Jinglong(Department of Locomotive and Rolling Stock,Baotou Railway Vocational&Technical College,Baotou 014060,China;School of Materials Science and Engineering,Inner Mongolia University of Technology,Huhehot 01005l,China)
出处
《腐蚀与防护》
CAS
CSCD
北大核心
2023年第2期40-44,119,共6页
Corrosion & Protection
基金
内蒙古自治区教育科学研究“十三五”规划课题(NZJGH2019166)。
关键词
车轮钢
电渣重熔
合金元素
组织
性能
wheel steel
electroslag remelting
alloying element
microstructure
property
