Patent ID: 8652400
Filing Date: 2014-02-18
Classification: B05D,B21D,B21J,C08G,C08J,C08K,C08L,C09D,C22C,C22F,F16L

Abstract:
1. A process comprising: a first heating step comprising heating a nickel-base alloy workpiece to a temperature in the range of 2000° F. to 2125° F.; a first forging step comprising rotary forging the heated nickel-base alloy workpiece to a reduction in area of 30% to 70%, wherein the nickel-base alloy workpiece is at a temperature in the range of 2000° F. to 2125° F. when the first forging step begins; a second heating step comprising heating the rotary-forged nickel-base alloy workpiece to a temperature in the range of 1750° F. to 1925° F., wherein the rotary-forged nickel-base alloy workpiece is maintained at elevated temperature and not permitted to cool to ambient temperature between completion of the first forging step and beginning of the second heating step; and a second forging step comprising rotary forging the heated nickel-base alloy workpiece to a reduction in area of 20% to 70%, wherein the nickel-base alloy workpiece is at a temperature in the range of 1750° F. to 1925° F. when the second forging step begins; wherein the nickel-base alloy workpiece comprises, by weight, up to 0.05% carbon, 27.0% to 31.0% chromium, up to 0.5% copper, 7.0% to 11.0% iron, up to 0.5% manganese, up to 0.015% sulfur, up to 0.5% silicon, at least 58% nickel, and incidental impurities.