Production method for Fe-Ni based heat-resistant superalloy

摘要

A production method for an Fe—Ni based heat-resistant superalloy inhibits abnormal grain growth and yields a fine crystal grain structure having an ASTM crystal grain size number of 9 or greater. The production method comprises at least a hot working step in which a material having a prescribed composition is subjected to hot working, wherein the hot working step includes at least a step in which the above material of 930 to 1010° C. is subjected to hot working so that the relation of (effective strain)≥0.139×(effective strain rate(/sec))^−0.30 is satisfied in the entirety of the above material.