Patent ID: 6334912
Filing Date: 2002-01-01
Classification: C22F

Abstract:
A high strength, thermally stable Niâ€”Feâ€”Co alloy at room and elevated temperatures, the alloy being characterized as a pre-manufactured alloy bar or rod stock with a nominal composition consisting essentially by weight of 38% Ni, 42% Fe, 13% Co, 4.7% Nb, 1.5% Ti, 0.4% Si, 0.03% Al, 0.01% C and absent Cr, that has been treated thermomechanically with heat and rotoforging, and having an ultra-small grain size, a dispersoid strengthening mechanism related to the fragmentation of the grain boundary carbide phases of the alloy and a stress rupture rate that is about twice as long as the untreated alloy bar or rod stock.