KONG Dejun*, ZHOU Chaozheng1
(1. College of Mechanical Engineering, Changzhou University, Changzhou 213016, China 2. Digital Design Key Laboratory of Changzhou City, Changzhou 213164, China)
Abstract: By using borax salt and vanadium as the main materials, the VC (Vanadium Carbide) coating was prepared on the surface of Cr12MoV steel with a TD (thermal diffusion) process. The micro-structures of the coating were observed with SEM and EDS. The reciprocating friction and wear of Cr12MoV steel disk against a steel ball under unlubricated condition at room temperature were evaluated and wear mechanism were analyzed. The results show that VC coating was composed of flocculent aggregate VC grains and had a uniform structure. The metallurgical bonding was found at the coating/substrate interface. VC coating showed excellent resistance to wear under the unlubricated condition. The wear mechanism of VC coating was a combination of fatigue wear and abrasive wear.
Key words: TD process; VC coating; wear property; friction coefficient
E-mail: kong-dejun@163.com
Tribology, Vol. 31, Issue 4, 2011, 335~339
