METHOD FOR SUPERPLASTIC FORGING OF NICKEL-BASED ALLOY

摘要

PROBLEM TO BE SOLVED: To provide a superplastic forging method that can forge a nickel-based alloy in a comparatively low hot-forging temperature range of 800°C or lower, to achieve the near net shape and net shape of the nickel-based alloy.;SOLUTION: A method for superplastic forging of a nickel-based alloy includes a crystal grain refining step of refining crystal grains of the nickel-based alloy by clamping the nickel-based alloy between two anvils, and displacing one anvil relatively to the other anvil to impart a huge strain to the nickel-based alloy; and a strain rate control forging step of holding the temperature of the nickel-based alloy whose crystal grains are refined, to 800°C or lower, and controlling the strain rate to carry out superplastic forging.;COPYRIGHT: (C)2013,JPO&INPIT