Co - Cr - Mo alloy has excellent corrosion resistance and abrasion resistance, and it is widely used as a biomaterial such as an artificial hip joint. This alloy’s hardness, scratch resistance, and light weight will be merits when used for watch exteriors. However, the alloy has poor plasticity and difficulty in hot forging. These shortcomings must be overcome to satisfy the high aesthetic demand for watch exteriors. This paper reports optimum forging conditions and process design guidelines obtained by forging simulation. The simulation enabled us to evaluate the forging processes and allowed us to fabricate the fine features of watch exteriors.
