摘要
采用等离子熔覆技术在挖泥船耙齿材料低碳马氏体铸钢表面制备了镍铬碳合金层,借助OM、SEM、EDS、XRD和显微硬度计等对熔覆层的显微组织、化学成分和显微硬度等进行了分析。结果表明:熔覆层与基体形成了冶金结合,主要由-γFe+(Cr,Fe)7C3共晶相和初生板条或块状硬质耐磨相(Cr,Fe)7C3组成;当熔覆电流为100 A、扫描速度为150 mm.min-1时,熔覆层的组织最致密,显微硬度高达1 053 HV。
Ni-Cr-C alloy coating was prepared by plasma cladding technique on the surface of scoop tooth of dredger material low carbon martensite cast steel. The microstructure, chemical composition and micro-hardness of the cladding coating were investigated with OM, SEM, EDS, XRD and micro-hardness tester. The results show that the coating had metallurgy combination with the matrix, which was composed of eutectic γ-Fe/（Cr,Fe）TC3 and primary hard wear resistant phase （Cr, Fe）TC3 with the forms of lath or block. The densest coating was obtained with the cladding current of 100 A and the scanning velocity of 150 mm· min-1 , and the micro-hardness reached up to 1 053 HV.
出处
《机械工程材料》
CAS
CSCD
北大核心
2011年第4期83-86,90,共5页
Materials For Mechanical Engineering
基金
江苏省科技成果转化项目(JHZD09-04)
关键词
等离子熔覆
镍铬碳合金层
耙齿
硬度
plasma cladding
Ni-Cr-C alloy coating
scoop tooth
hardness
