Study on tribological performances of in situ -boriding laser cladding FeCoCrNiMn layers and its implementation in gear repair

In high-speed and heavy-load mechanical operations, gears are susceptible to pitting, adhesion, and wear, which resulting tooth breakage and wear failure. In this paper, failed gears are subjected to repair experiments through the integration of laser cladding and boriding, and the tribological performances and post-repair vibration characteristics are also systematically investigated. In comparison to the base material, the average hardness of the boride surface exhibited an increase of up to 8.37 times, while the wear resistance increased to 15.60 times. The wear resistance of the repaired gear is 2.62 times that of the normal gear, and its vibration parameters are commensurate with that of the normal gear, which offers empirical substantiation for the enhancement of gear repair and remanufacturing strategies.