SiC颗粒对激光熔覆镍基涂层的影响

Laser clad Ni based alloy coating with 2%、4%、6%、8%(wt%) SiC on 45 steel substrate has been obtained by 1500w CO2 continuous wave laser implement. Microstructure morphology, the hardness, the wear resistance and the corrosion resistance of the laser clad alloy coating have been studied compare with Ni60. The result shows that the hardness, the wear resistance and the corrosion resistance of the NiSiC coating are higher than that of the Ni60 coating. When the content of SiC in Ni based alloy coating is 8%(wt%), the HRA 80 is increased 13.2%, the wear resistance rate is 8.33 that is increased 88.9%, microhardness and the corrosion resistance is evidently increased that is compared to Ni60.