Gas turbine disk fuel and heat treatment process therefor

摘要

A gas turbine disk material according to the present invention contains: C: from 0.05 to 0.15%; Ni: from 0.25 to 1.50%; Cr: from 9.0 to 12.0%; Mo: from 0.50 to 0.90%; W: from 1.0 to 2.0%; V: from 0.10 to 0.30%; Nb: from 0.01 to 0.10%; Co: from 0.01 to 4.0%; B: from 0.0005 to 0.010%; N: from 0.01 to 0.05%; Mn: 0.40% or less; Si: 0.10% or less; and Al: 0.020% or less. The rest consists of Fe and unavoidable foreign substances. In addition, as a heat treatment method, a quenching temperature of a forged material having the constituent composition is set within a range of 1050 to 1150 ° C.