Method of heat treating a Ni-based superalloy article and article made thereby

摘要

A method of heat treating (100) an Ni-base superalloy article (12) is disclosed. The method (100) includes hot-working an article (12) comprising an NiCrMoNbTi superalloy comprising, in weight percent, at least about 55 Ni to produce a hot-worked microstructure; solution treating (110) the article (12) at a temperature of about 871°C (1600°F) to about 954°C (1750°F) for about 1 to about 12 hours to form a partially recrystallized warm-worked microstructure; and cooling (120) the article (12). The method also includes precipitation aging (130) the article (12) at a first precipitation aging temperature of about 704°C (1300°F) to about 760°C (1400°F) for a first duration of about 4 hours to about 12 hours; cooling (140) the article (12) to a second precipitation aging temperature; precipitation aging the article at a second precipitation aging temperature of about 621°C (1150°F) to about 649°C (1200°F) for a second duration of about 4 hours to about 12 hours; and cooling (160) the article (12) from the second precipitation aging temperature to an ambient temperature.