Patent ID: 6447624
Filing Date: 2002-09-10
Classification: C22C,C22F

Abstract:
A manufacturing method of a Ni-based alloy having improved hot sulfidation-corrosion resistance which alloy consists essentially of, in mass percentage, 0.005 to 0.1% C, 18 to 21% Cr, 12 to 15% Co, 3.5 to 5.0% Mo, not more than 3.25% Ti, and 1.2 to 4.0% Al with the balance substantially comprising Ni, wherein the alloy is, after solution heat treatment, subjected to stabilizing treatment at a temperature not lower than 860Â° C. and not higher than 920Â° C. for 1 to 16 hours, and aging treatment at a temperature not lower than 680Â° C. and not higher than 760Â° C. for 4 to 48 hours.