CAST NICKEL-IRON-BASE ALLOY COMPONENT AND PROCESS OF FORMING CAST NICKEL-IRON-BASE ALLOY COMPONENT

摘要

PROBLEM TO BE SOLVED: To secure oxidation resistance, thermomechanical fatigue resistance, creep strength at high temperature in a stator component that is a high-temperature gas flow channel component of a gas turbine.;SOLUTION: A cast nickel-iron-base alloy component includes, by weight, about 12.0% to about 16.5% Cr, about 1.0% to about 2.0% Al, about 2.0% to about 3.0% Ti, about 2.0% to about 3.0% W, about 3.0 to about 5.0% Mo, up to about 0.1% Nb, up to about 0.2% Mn, up to about 0.1% Si, about 0.05% to about 0.10% C, about 0.003 to about 0.010% B, about 35% to about 37% Fe, and balance essentially Ni and inevitable impurities. The nickel-iron-base alloy component has a creep rupture life greater than about 1,000 hours at about 25 ksi to about 30 ksi at about 1,400°F. A method for forming the cast nickel-iron-base alloy component is also disclosed.;COPYRIGHT: (C)2013,JPO&INPIT