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采用高频感应真空熔覆技术,制备钴基合金涂层。使用扫描电子显微镜观察涂层在不同深度的组织结构,用X射线能谱仪(EDS)探测涂层的化学元素组成,用显微硬度计测量涂层不同深度的显微硬度值。试验结果表明,熔烧状态的不同对涂层和基体化学元素之间扩散程度有显著的影响。熔烧时间越长,扩散程度越大。钴基合金涂层的硬度显著高于Q235钢基体,其显微硬度随着熔烧时间的延长而略有降低,但其硬度更均匀。
High-frequency induction vacuum cladding technology, preparation of cobalt-based alloy coating. Scanning electron microscope (SEM) was used to observe the microstructure of the coating at different depths. The chemical composition of the coating was detected by X-ray EDS (EDS) and the microhardness of the coating was measured by microhardness tester. The experimental results show that the different sintering conditions have a significant influence on the degree of diffusion between the coating and the matrix chemical elements. The longer the melting time, the greater the degree of diffusion. The hardness of cobalt-based alloy coating is significantly higher than the Q235 steel substrate, the microhardness decreases slightly with the increase of sintering time, but its hardness is more uniform.