锻造及热处理工艺对耐磨钢组织及耐磨性能的影响  

Effect of forging and heat treatment on microstructure and wear resistance of wear-resistant steel

作　　者：张衡 张迪 刘馨宇 王晓东[1] 高占勇[1] 陈林[1] Zhang Heng;Zhang Di;Liu Xinyu;Wang Xiaodong;Gao Zhanyong;Chen Lin(School of Materials and Metallurgy(Rare Earth College),Inner Mongolia University of Science and Technology,Baotou Inner Mongolia 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院(稀土学院),内蒙古包头014010

出　　处：《金属热处理》2022年第7期138-143,共6页Heat Treatment of Metals

基　　金：包头市科技计划项目(2019Z3004—1)。

摘　　要：研究了锻造变形量与热处理工艺对一种新型耐磨钢显微组织、硬度和耐磨性的影响,并用彩色金相法定量分析了钢中马氏体+残留奥氏体含量。结果表明:不同变形量下耐磨钢组织均为贝马复合相,贝氏体板条厚度由30%变形量的524 nm降低到70%变形量的292 nm,马氏体+残留奥氏体体积分数由25.4%增加至41.1%;与直接进行260℃等温转变时相比,先在Ms点以上的330℃保温5 min,再进行260℃等温转变时的贝氏体板条厚度减少了357.2 nm,磨损量降低了0.02 g,且平均摩擦因数由0.311降至0.212。Effect of forging deformation and heat treatment process on microstructure,hardness and wear resistance of a new wear-resistant steel was studied,and the content of martensite+retained austenite in the steel was quantitatively analyzed by color metallography method.The results show that the wear-resistant steel microstructure under different deformations are all bainite/martensite multiphase,and the thickness of the bainitic lath is reduced from 524 nm to 292 nm as the deformation increases from 30%to 70%,while the volume fraction of martensite+retained austenite increases from 25.4%to 41.1%.After holding at 330℃(above the Ms)for 5 min and then 260℃isothermal transformation,and compared with that of direct 260℃isothermal transformation without 330℃holding,the thickness of bainite lath decreases by 357.2 nm,the wear loss decreases by 0.02 g,and the average friction factor decreases from 0.311 to 0.212.

关 键 词：锻造 热处理工艺 耐磨性能 贝马复相组织 

分 类 号：TG156.1[金属学及工艺—热处理]