Patent ID: 6409853
Filing Date: 2002-06-25
Classification: B21J,C22F

Abstract:
A process for forging a gas turbine component having a weight of at least 10,000 lbs. from Alloy 718 material so that the component does not exhibit any abnormal grain growth, comprising the steps of:a) providing a billet with an average grain size between ASTM 0 and ASTM 3; b) heating the billet to a temperature of between 1750Â° and 1800Â° F.; c) upsetting the billet to obtain a component part with a minimum strain of 0.125 in at least selected areas of the part; d) reheating the component part to a temperature between 1750Â° and 1800Â° F.; e) upsetting the component part to a final configuration such that no areas of the component part receive strains between 0.01 and 0.125; f) solution treating the selected areas of the component part at a temperature of between 1725Â° F. and 1750Â° F.; and g) aging the selected areas of the component part over predetermined times at different temperatures.