HIGH-STRENGTH Co-BASED ALLOY WITH ENHANCED WORKABILITY AND PROCESS FOR PRODUCING THE SAME

摘要

A Co-based alloy being useful as a spiral spring, common spring, wire, cable guide, steel belt, build-up material, guide wire, stent, catheter, etc. There is provided a Co-based alloy having a composition of Co-Al binary system containing 3-13% Al loaded with at least one workability enhancing element selected from among 0.01-50% Ni, 0.01-40% Fe and 0.01-30% Mn and having a lamellar structure wherein f.c.c. structure a-phase and ß(B2)-phase are repeated in layers. The lamellar structure is so regulated that the occupancy ratio of the whole structure is 30 vol.% or above and the layer spacing is 100 µm or less. At least one optional component selected from among Ga, Cr, V, Ti, Mo, Nb, Zr, W, Ta, Hf, Si, Rh, Pd, Ir, Pt, Au, B, C and P may be added in a total amount of 0.01 to 60%.