Abstract:The effect of heating temperature and thermal-cold recycle times on microstructure and hardness of a W-Cr-Mn-Mo-V Ferro-based hardfacing layer was studied. The results show the surfacing layer has good high-temperature stability and ability to resist quench heat and heat softening. After thermal-cold recycle at 560 °C 18 °C for 120 times, the hardness of the hardfacing layer is HRC 57.5, its microstructure is mainly tempered martensite and a small amount of retained austenite, when thermal-cold recycled at 680 °C 18 °C for 120 times, the hardness of the hardfacing layer is HRC 44.5, martensite in the hardfacing layer has almost decomposed.