摘要
以Ni60A粉、SiC粉为原料,利用氩弧熔覆技术在Q235钢基材表面制备出复合涂层,应用SEM和XRD方法分析了涂层的显微组织.结果表明,复合涂层与基材实现了良好的冶金结合,复合材料涂层无单独的SiC,而是由Ni3Si枝晶、M7C3和-γNi固溶体组成,Ni3Si枝晶均匀的分布-γNi固溶体基体上,涂层的显微硬度达到1 100HV0.2,涂层的耐磨性较基体提高近13倍.
A metal matrix composite coating was fabricated by means of argon arc cladding technique with the pre-alloyed powder of Ni60A and SiC.Scanning electron microscopy(SEM) and X-ray diffraction(XRD) were used to analyze the microstructure of coating.The results show that composite coating with excellent metallurgical bonding between the coating and substrate can be obtained by argon arc cladding,the main phases of coating are Ni3Si dendrite,M7C3 and γ-Ni,no SiC left,and Ni3Si dendrites distribute in the matrix of Ni-based alloy homogeneously.The maximum microhardness of the coating can up to 1100 HV0.2,and the wear resistance of the coating is about 13 times higher than that of Q235 steel substrate.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2009年第3期58-60,116,共3页
Transactions of The China Welding Institution
基金
黑龙江省教育厅基金资助项目(11511351)
黑龙江科技学院引进人才基金资助项目(07-57)
哈尔滨市青年科技创新基金资助项目(RC2009QN017080)
关键词
氩弧熔覆
复合涂层
原位合成
耐磨性
argon arc cladding
composite coating
in-situ synthesis
wear resistance
