Effects of Laser Cladding Fe-WC Gradient Composite Coating on Wear Resistance of 40Cr Alloy Steel
WC-reinforced Fe matrix composite coatings on 40Cr steel were prepared by ND-YAG laser device.The wear resistance of the single-layer,the multi-layer and the gradient coatings was also tested respectively.Composite coatings for comparison are:single layer 50%WC/Fe cladding coating,three layers 50%WC/Fe cladding coating,10%WC/Fe+30%WC/Fe+50%WC/Fe gradient coating.The microstructure,micro-hardness and wear resistance of the coating materials were also analyzed.The formation and growth mechanism of different grains were discussed,and the influence mechanism of WC particles on the wear resistance of the coating was expounded.The results show that,compared with the single-layer Fe matrix WC cladding coating,the multilayer Fe matrix WC cladding coating shows excellent wear resistance.The gradient coating has higher hardness,wear resistance and higher friction coefficient.
laser claddingFe based coatingWC particleswear resistancemicro-hardness
NETL
NSTL
万方数据
