摘要
采用自制Mo-Cr-Fe-B系药芯焊丝通过堆焊法在Q235钢基体表面制备覆层。借助光学显微镜、SEM、XRD、EDS、显微硬度计、磨损试验机等对覆层及结合界面的组织结构、物相、硬度分布及耐磨性进行了表征与分析,并研究了覆层堆焊成型的反应过程。结果表明,覆层主要由Mo_2FeB_2、M_3B_2(M:Mo、Cr、Fe)、Fe_2B、Fe(Cr、Mo)等相组成,覆层与钢基体结合良好,在覆层-钢基体界面结合处有元素的扩散,覆层硬度最高可达980HV0.5且耐磨性良好。
The coating was prepared on the surface of the Q235 steel by argon arc cladding using a selfmade Mo-Cr-Fe-B flux cored wire.The microstructure,phase,hardness,and wear resistance of the coating and the interface were analyzed by optical microscopy,SEM,XRD,EDS,microhardness tester and wear tester.The reaction process of surfacing coating was also studied.The results show that the coating consists of Mo_2FeB_2,M_3B_2（M：Mo,Cr,Fe）,Fe_2B,Fe（Cr,Mo）.It is well combined with the steel substrate,and the element diffusion occurs at the interface between the coating and the steel substrate.The hardness of the coating can reach 980 HV0.5 and shows a good wear resistance.
作者
李子豪
潘应君
柯德庆
黄辽
常智敏
Li Zihao;Pan Yingjun;Ke Deqing;Huang Liao;Chang Zhimin(College of Science and Metallurgical Engineering,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《武汉科技大学学报》
CAS
北大核心
2018年第4期252-256,共5页
Journal of Wuhan University of Science and Technology
基金
武汉科技大学省部共建耐火材料与冶金国家重点实验室青年基金资助项目(2016QN18)
武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室开放基金资助项目(FMRUlab17-7)
关键词
堆焊
合金覆层
Mo2FeB2
显微组织
显微硬度
耐磨性
surfacing
alloy coating
Mo_2FeB_2
microstructure
microhardness
wear resisting property
