田间触土部件用60Si2Mn钢激光熔敷硬质相增强耐磨层的组织性能  

Microstructure and properties of hard-phase reinforced wear-resistant layer on 60Si2Mn steel for soil-engaging component deposited by laser cladding

作　　者：陈登华 于洪海 刘海定 何曲波 张洁柯[5] 黄海堂 龚宇豪 Chen Denghua;Yu Honghai;Liu Haiding;He Qubo;Zhang Jieke;Huang Haitang;Gong Yuhao(Chongqing Materials Research Institute Co.,Ltd.,Chongqing 400707,China;Chongqing Key Laboratory of Corrosion Resistant Alloys,Chongqing 400707,China;National Instrument Functional Materials Engineering&Technology Research Center,Chongqing 400707,China;Guangzhou Bureau of Sea Decoration,Chongqing 400042,China;School of Materials Science and Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆材料研究院有限公司,重庆400707 [2]耐腐蚀合金重庆市重点实验室,重庆400707 [3]国家仪表功能材料工程技术研究中心,重庆400707 [4]海装广州局,重庆400042 [5]重庆大学材料科学与工程学院,重庆400044

出　　处：《金属热处理》2023年第12期213-221,共9页Heat Treatment of Metals

基　　金：中国机械工业集团有限公司重大科技专项(ZDZX2020-2);中国机械工业集团有限公司青年科技基金(QNJJ-ZD-2022-19)。

摘　　要：设计了3种不同成分(I、Ⅱ、Ⅲ)的高耐磨粉末材料,利用激光熔敷对犁铧用60Si2Mn钢进行了表面强化,结合淬火和回火来调控硬质相的形貌分布特点,提高入土工作部件的耐磨性能。结果表明,淬火态熔敷层中主要析出相包括VC碳化物、晶界富Fe和Cr网状碳化物和Fe_(2)O_(3)颗粒。500℃高温回火后,微观组织以回火马氏体和碳化物为主。XRD物相分析证明熔敷层中存在VC、MoC、Cr_(3)C_(2)等多种碳化物。成分Ⅲ的熔敷层具有最高的硬度值;回火试样的磨损率全部高于淬火试样,且回火态成分Ⅱ的熔敷层的磨损率最低。不同熔敷层的磨损机制包括磨粒磨损和氧化磨损。High wear-resistant powder materials with 3 different chemical compositions(I,Ⅱ,Ⅲ)were designed and used to reinforce the surface of the 60Si2Mn ploughshare steel by laser cladding,then combined with quenching and tempering treatment to control the morphology and distribution characteristics of hard phases to improve the wear resistance of the working components.The results show that the as-quenched deposited metal mainly contains precipitated phases including VC carbide,Fe-rich and Cr-rich networked carbides,and Fe_(2)O_(3)particles.After tempering at 500℃,the microstructure is dominated of tempered martensite and carbide,and the XRD phase analysis shows that the VC,MoC,Cr_(3)C_(2)and other carbides exist in the deposited metal.The deposited metal with compositionⅢhas the highest hardness value and the wear rate of tempered specimens is higher than that of the quenched,while the wear rate of deposited metal with compositionⅡis the lowest.The wear mechanisms for different deposited metals include abrasive wear and oxidation wear.

关 键 词：触土部件 激光熔敷 马氏体 碳化物 回火 耐磨性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]