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采用激光熔覆技术制备FeCoCrNiBx高熵合金涂层,用X射线衍射(XRD)、扫描电镜(SEM)、硬度和耐磨测试等方法,研究了B含量对激光熔覆FeCoCrNiBx高熵合金涂层的组织结构、硬度和耐磨性能的影响。结果表明,随B含量的增加,合金相结构逐渐由fcc固溶体结构转变为fcc固溶体和M3B相共存,M3B相主要为Cr、Fe硼化物。随B含量的增加,枝晶组织中析出颗粒状和短棒状的M3B相,且M3B相逐渐长大成长条状。B的增加显著提高合金涂层的硬度,由4470 MPa增加到8480 MPa,且磨损量随着B的增加而减少。
The FeCoCrNiBx high-entropy alloy coating was prepared by laser cladding. The effects of B content on the laser cladding of FeCoCrNiBx high-entropy alloy coating were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), hardness and wear resistance test. Tissue structure, hardness and wear resistance. The results show that with the increase of B content, the phase structure of the alloy gradually changes from fcc solid solution to fcc solid solution and M3B phase coexist. The main phase of M3B is Cr, Fe boride. With the increase of B content, the granular and short rod-like M3B phases were precipitated in the dendritic structure, and the M3B phase grew up in strips. The increase of B significantly increased the hardness of the alloy coating from 4470 MPa to 8480 MPa, and the wear loss decreased with the increase of B content.