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利用等离子熔覆技术在Q235钢板上制备Al Co Cr Cu Fe Ni Mn V0.2Cx(x=0,0.02,0.05,0.1,0.2,摩尔比)高熵合金熔覆层,采用XRF、OM、SEM、XRD、显微硬度计等分析了熔覆层的合金成分、微观组织、物相结构以及显微硬度。结果表明,熔覆层基体组织均为典型的树枝晶结构,由FCC+BCC固溶体组成,枝晶为BCC相,枝晶间为FCC相。当x为0.05~0.2时,熔覆层组织中有大量VC相在枝晶内析出,其形态多呈十字状和多边形颗粒状。由于碳的固溶强化作用和VC的析出相强化作用,随着碳含量的增加,熔覆层显微硬度呈增大的趋势,当x=0.2时,显微硬度达到572.4 HV。
The high-entropy alloy cladding layer of Al Co Cr Cu Fe Ni Mn V0.2Cx (x = 0,0.02,0.05,0.1,0.2, molar ratio) was prepared on Q235 steel plate by plasma cladding technique. XRD, OM, SEM, XRD, microhardness and other analysis of the alloy coating composition, microstructure, phase structure and microhardness. The results show that the matrix structure of the coating is a typical dendrite structure composed of FCC + BCC solid solution, the dendrite is BCC phase and the dendrite is FCC phase. When x is between 0.05 and 0.2, a large amount of VC phase precipitates in the dendrite within the cladding layer, and its morphology is mostly cruciform and polygonal granular. With the increase of carbon content, the microhardness of the coating tends to increase due to the solid solution strengthening effect of carbon and the precipitation strengthening phase of VC. When x = 0.2, the microhardness reaches 572.4 HV.