Patent ID: 6033498
Filing Date: 2000-03-07
Classification: C22C,C22F

Abstract:
A method for increasing mechanical properties of the improved Ni.sub.3 Al intermetallic alloys for use in a forging die, comprising the steps of:providing a nickel aluminide intermetallic alloy charge;melting said alloy charge to create a molten charge;alloying said molten charge with an additional of enough molybdenum to bring its concentration to at least 4.5 weight % and no more than 5.5 weight % to create a modified molten charge;casting a forging die from said modified molten charge;heat treating said die as-cast to a minimum of 2100.degree. F. and a maximum of 2282.degree. F. for between 2 hours and 48 hours; andaging said as-cast heat treated die at a minimum of 1150.degree. F. to a maximum of 1350.degree. F. for 2 hours to 12 hours.