Effects of Cu-Ni-Ti Interlayer on Microstructure and Wear Resistance around Gas Tungsten Arc Cladding Copper Matrix Composite Coatings on Steel

Due to the huge difference in thermophysical properties, it is difficult obtain a defect-free bonding interface between copper and steel. A Cu-Ni-Ti interlayer was added TiC-reinforced matrix composite coating Q235 steel this study improve its interfacial bond. The influence of on microstructure properties studied by characterizing microstructure, phase composition, wear resistance coatings. Both coatings were found consist α-Cu matrix, situ-generated TiC, Fe-rich phases. With addition interlayer, high-hardness unmixed zone at successfully eliminated due sufficient mixing molten pool. Even more importantly, liquid metal embrittlement cracks also restrained, resulting from solid solution band that reduced contact probability around atoms with grain boundaries formed. In addition, results showed microhardness improved loss 4.2% after adding which related combined action strengthening, second-phase strengthening grain-refinement mechanisms.