Abstract: The friction and wear behavior of Co-based alloy is researched based on pin-on-disc model in order to predict wear loss of large-size contact pair. A pin-on-disc experiment with self-designed device is done to get the law of wear loss of Stellite6 influenced by grinding-process, sliding speed and pressure. Based on experiment results, a sliding wear prediction model is established by combining the law and finite element method, while dynamic simulation of the whole wear process is achieved by moving boundary nodes and updating mesh automatically. A numerical simulation platform is established to automatically simulate and analyze wear process, and is applied to large-size trunnion-sleeve wear problem. Results demonstrate that finite element method is highly effective tool to simulate complex nonlinear wear process via series of discrete quasi static models based on experiment confirmed laws, and the prediction model proposed is reliable and effective.

Key words: Co-based alloy, Pin-on-disc model, Simulation of wear, Sliding wear