Study on microstructure and properties of high frequency induction cladding TiC/Ni coating after solution treatment

To improve the performance of the 35CrMo sucker rod during operation, the microstructure, microhardness and wear properties of the TiC/Ni-based composite coating prepared by induction high frequency cladding at different solution treatment temperatures were investigated. The results show that the coating consists mainly of γ-Ni, Ni₃Fe, Cr₂₃C₆, CrB, TiC, SiB₆, NiCr₂O4 and Fe₂O₃ phases after solution treatment. The average microhardness of the coating increased from 835.7 HV_0.2 before the heat treatment to a maximum of 890.3 HV_0.2, an increase of 6.5%. The wear resistance of the coating increases first and then decreases with the increase of solution treatment temperature. When the solution temperature is 950 °C, the wear resistance is best. The wear mechanism of the coating and friction pair is mainly adhesive wear and abrasive wear, and accompanied by brittle fracture. (paper)