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以设定比例的Fe、W、C等粉末为反应元素,通过激光和氩弧在Q235钢基体上熔覆原位反应合成WC颗粒增强铁基涂层。利用SEM和EDS分析熔敷层组织和成分,利用显微硬度仪测量熔敷层至基体的硬度。结果表明:激光和氩弧熔敷均得到成型良好的熔敷层,激光熔敷层的硬质相主要是枝晶Fe3W3C并含有少量WC颗粒,氩弧熔敷层内硬质相都是块状WC颗粒。激光熔敷层最大硬度达906 HV,氩弧熔敷层最大硬度达1108 HV。
A set proportion of Fe, W, C and other powders were used as reaction elements, and the WC particles reinforced Fe-based coatings were synthesized by laser cladding and argon arc reaction on the Q235 steel matrix. The structure and composition of the deposited layer were analyzed by SEM and EDS, and the hardness of the deposited layer to the substrate was measured by using a microhardness tester. The results show that both the laser cladding and the argon arc cladding have a well-formed cladding layer. The hard phase of the laser cladding layer is mainly dendritic Fe3W3C and contains a small amount of WC particles. The hard phases in the arc cladding layer are massive WC Granules. Laser cladding maximum hardness of 906 HV, argon arc cladding maximum hardness of 1108 HV.