Patent ID: 8529710

Claim:
A high-strength Co-based alloy produced by the steps of: dissolving a Co-based alloy having a composition that comprises, on the basis of mass percent, 3 to 13% of Al, and 0.01 to 60% of one or more workability enhancing elements selected from the group consisting of 0.01 to 50% of Ni, 0.01 to 40% of Fe and 0.01 to 30% of Mn; solidifying with an average cooling rate of 50 to 200 ° C/min in the range of 1500 to 600 ° C.; and performing cold working at a working ratio of 10% or more; wherein the high-strength Co-based alloy has a metallic structure having a lamellar structure wherein a f.c.c. structure a-phase and β(B2)-phase with an interlayer spacing of 100 μm or less are repeated in layers and the occupancy ratio is 30% by volume or more.