Microstructure and Properties of WC-Reinforced Inconel 718 Alloy Cladding Layer by TIG on Low Carbon Steel Surface

In order to improve wear resistance and the utilization rate of Q345 steel, the flux-cored wire was prepared by rolling method and IN718/WC cladding layer was prepared by TIG process. The effects of different contents of WC on the microstructure and properties of IN718 alloy cladding layer were studied. The results show that with the increase in WC content, the consumption and segregation of Mo and Nb elements are weakened, the harmful phase of Lave is reduced, and the microstructure of the cladding layer is refined. The phase of IN718/xWC cladding layer is mainly composed of Fe3Ni2, & gamma;(Ni, Fe), WC/W2C etc. The results of microhardness, wear tests show that the IN718/25wt.% WC cladding layer has the smallest wear loss and the highest microhardness, which is related to the combined action of fine crystal strengthening, dispersion strengthening and solid solution strengthening, so it shows the best wear resistance.