Patent ID: 6224695
Filing Date: 2001-05-01
Classification: C22C,C22F

Abstract:
A Ni-base directionally solidified alloy casting manufacturing method comprising:a process of producing a Ni-base directionally solidified alloy casting by casting a Ni-base directionally solidified alloy having a composition of 10 to 14 wt. % Co, 2 to 3 wt. % Cr, 1.5 to 2.5 wt. % Mo, 5 to 6.5 wt. % W, 5.7 to 6.5 wt. % Al, 5.5 to 6.5 wt. % Ta, 4.5 to 5.0 wt. % Re, 0.01 to 0.30 wt. % Hf, 0.01 to 0.30 wt. % C, 0.01 to 0.03 wt. % B, and the balance of Ni and inevitable impurities; anda process of subjecting the Ni-base directionally solidified alloy casting to a two-stage aging process comprising a first stage aging and a second stage aging, for aging, the Ni-base directionally solidified alloy casting at temperatures in the range of 750 to 1200.degree. C.