Nb微合金化对中碳耐磨钢组织及耐磨性能的影响  

Effect of Nb Micro-alloying on Microstructure and Wear Resistance of Medium-carbon Wear-resisting Steel

作　　者：李豪[1,2] 柳翊 安俊超 郝俊辉 张伟 LI Hao;LIU Yi;AN Junchao;HAO Junhui;ZHANG Wei(School of Materials Science and Engineering,Luoyang Institute of Science and Technology,Luoyang 471023;Henan Intelligent Manufacturing Engineering Technology Research Center for Building Profile,Luoyang 471023,China)

机构地区：[1]洛阳理工学院材料科学与工程学院,河南洛阳471023 [2]河南省建筑型材智能制造工程技术研究中心,河南洛阳471023

出　　处：《热加工工艺》2025年第6期142-146,共5页Hot Working Technology

基　　金：河南省高等学校重点科研项目(21B430012,16A430020);洛阳理工学院高层次人才科研启动项目(2017BZ05,2013BZ11)。

摘　　要：研究了盾构机盘形滚刀刀圈材料合金成分设计和热处理工艺优化,采用光学显微镜(OM)和扫描电镜(SEM)分析了刀圈的铸态、热处理态组织及摩擦磨损形貌,利用摩擦磨损设备进行了耐磨性能实验。结果表明:随着Nb元素的添加,铸态组织凝固偏析减少,组织明显细化;热处理后组织晶粒细化均匀,偏析现象基本消除;不含Nb的试样摩擦磨损形貌以犁沟磨损为主;含0.01wt%~0.02wt%Nb的试样摩擦磨损形貌以粘着磨损为主;含0.04wt%~0.05wt%Nb的试样摩擦磨损形貌既有犁沟磨损,又存在粘着磨损,其摩擦磨损后磨损量和深度尺寸变化均最少,其耐磨性能相对较好。The design of alloy composition and the optimization of heat treatment process for shield machine disc shaped hobring were studied.The as-cast and heat treatment state microstructure,and friction wear morphology of ring were analyzed by using optical microscope(OM)and scanning electron microscope(SEM).The wear resistance experiments were performed using friction wear equipment.The results show that with the addition of Nb element,the solidification segregation of the as-cast microstructure decreases and the microstructure is obviously refined.After heat treatment,the grain refinement is uniform and segregation is basically eliminated.The friction and wear morphology of the sample without Nb is dominated by furrow wear,and that of the sample with 0.01wt%-0.02wt%Nb is dominated by adhesive wear.The friction and wear morphology of the sample with 0.04wt%-0.05wt%Nb is both furrow wear and adhesive wear,and the wear amount and depth of 3 sample change the least after friction and wear,and the wear resistance is relatively good.

关 键 词：耐磨钢 热处理工艺 组织形貌 摩擦磨损形貌 耐磨性能 

分 类 号：TG161[金属学及工艺—热处理]