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Abstract：
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In order to prevent the wear failure phenomenon of H13 hot die steel during use process and make it have self-lubricating ability in the working environment（200 ℃）, the composite coating of Stellite 6-Cr3C2-WS2 with self-lubricating ability was successfully prepared on the surface of H13 hot die steel by laser cladding, and the influences of composite coating Stellite 6-Cr3C2-WS2 on the surface properties of the cladding coating were studied. Then, the cladding coating was conducted by X-ray diffraction (XRD) analysis, scanning electron microscope (SEM) microstructure observation, energy spectrum (EDS) analysis, microhardness test and friction and wear test, and the phase composition, microstructure, microhardness and wear resistance of cladding coating were systematically analyzed. The results show that the main phases generated by the reaction of the cladding coating under the laser beam irradiation are γ-(Fe, Co), Cr7C3 hard phase, (Cr, W)C carbide and CrS self-lubrication phase, and the microstructure of the cladding coating is mainly composed of plane crystals and dendrites. In addition, the hardness of the cladding coating is two to three times the hardness of the substrate, and the surface friction coefficient is 65% of the surface friction coefficient of the substrate. Thus, the hardness and wear resistance of the cladding coating on the surface of H13 hot die steel have been greatly improved.
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Funds：
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江苏省重点研发计划项目（BE2019025）;江苏省研究生科研与实践创新计划项目（SJCX_0545）
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AuthorIntro：
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作者简介：刘博（1996-），男，硕士研究生，E-mail：574251263@qq.com；通信作者：陈炜(1965-），男，博士，教授，E-mail：chen_wei@ujs.edu.cn
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Reference：
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