OXIDE DISPERSION STRENGTHENING TYPE NICKEL-BASED SUPERALLOY

摘要

PROBLEM TO BE SOLVED: To provide an oxide dispersion strengthening type nickel-based superalloy improved in high-temperature strength by effectively achieving refinement of oxide particles and reducing dispersion interval of the oxide particles, in a gammer prime (γ') precipitation strengthening type Ni-based ODS superalloy having an Al content of 2% or more.SOLUTION: This oxide dispersion strengthening type nickel-based superalloy contains 2-6% of Al and yttrium oxide, and further contains hafnium of 1-4 times the yttrium oxide in mass ratio.