激光熔化沉积CrNiV系低合金钢的组织及性能  

Microstructures and properties of CrNiV series low alloy steels by laser melting deposition

作　　者：张春华[1] 赵超越 谭兵[1] 张松[1] 陈江[2] ZHANG Chun-hua;ZHAO Chao-yue;TAN Bing;ZHANG Song;CHEN Jiang(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China;Shenyang Dalu Laser Technology Company,Shenyang 110136,China)

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870 [2]沈阳大陆激光技术有限公司,沈阳110136

出　　处：《沈阳工业大学学报》2022年第1期26-31,共6页Journal of Shenyang University of Technology

基　　金：国家重点研发计划项目(2016YFB1100204);辽宁省重点研发计划项目(2018106004);沈阳市科技局计划项目(19-109-1-03).

摘　　要：为了提高核电应急凸轮轴的使用寿命,利用激光增材制造技术成功制备了不同含碳量的CrNiV系低合金钢.采用SEM、EDS、XRD、EBSD、显微硬度计和摩擦磨损实验机分析了CrNiV系低合金钢的显微组织、相组成、晶粒尺寸、显微硬度和摩擦磨损性能.结果表明:CrNiV系低合金钢的组成相为马氏体,随着C含量的增加,出现少量碳化物,马氏体平均晶粒尺寸减小;当碳含量由0.084%提高到0.26%时,低合金钢显微硬度提高,磨损体积由8.97×10^(6)μm 3减小到3.48×10^(6)μm 3,耐磨性明显提高.In order to improve the service life of nuclear power emergency camshaft,CrNiV series low alloy steels with different carbon contents were successfully prepared by using laser additive manufacturing technology.SEM,EDS,XRD,EBSD,microhardness tester and friction and wear tester were used to analyze the microstructure,phase composition,grain size,microhardness as well as friction and wear properties of CrNiV series low alloy steels.The results show that the phase composition of CrNiV series low alloy steels is martensite,a small quantity of carbides will appear with the increase of C content,and the average grain size of martensite decreases.When the carbon content increases from 0.084%to 0.26%,the microhardness of low alloy steels increases,the abrasion volume reduces from 8.97×10^(6)μm 3 to 3.48×10^(6)μm 3,and the wear resistance gets enhanced obviously.

关 键 词：激光熔化沉积 低合金钢 合金元素 晶粒尺寸 马氏体 磨损机制 比磨损率 显微硬度 

分 类 号：TG142[一般工业技术—材料科学与工程]