Influence of Laser Cladding Coating on Wear Resistance Property of High Mn Steel
FeCrVSi and Ni/WC coatings were successfully prepared on high Mn steel substrate using laser cladding technology,and their microstructure,microhardness and wear resistance were investigated.The results demonstrated that the microhardness and wear resistance of high Mn steel were both improved,with the FeCrVSi coating exhibiting superior properties compared to the Ni/WC coating.The wear rate of FeCrVSi and Ni/WC coatings were respectively reduced by 9.5% and 6.3%,while their microhardness increased to 470-550 HV and 500-630 HV.Those improvements were attributed to synergistic effect of solid solution strengthening and chilling process during laser cladding.Under high stress loading,the coatings with higher hardness effectively resisted wear damage,serving as the first defense line for high Mn steel.Furthermore,the hardness of substrate was further improved due to its plastic deformation and strengthening,resulting in martensitic transformation and lath martensite hardening.Therefore,the wear resistance of high Mn steel was enhanced through synergistic hardening mechanism of coating and substrate.
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