Property recovering method for ni-base heat resistant alloy

Details Property recovering method for ni-base heat resistant alloy Property recovering method for ni-base heat resistant alloy

C - Chemistry, Metallurgy

22

F

C22F 1/10 (2006.01)

Patent

CA 2262278

There is provided a property recovering method which can be applied to a high-temperature member whose properties such as strength and ductility have been deteriorated by the long-term use at a high temperature to recover its properties to those before the use, enable its reuse, and contribute to the effective use of resources and the conservation of environment. A Ni-base heat resistant alloy having a particular composition, whose properties have been deteriorated by heat history, is subjected to first-stage solution treatment, in which the alloy is held at a temperature of 1175 to 1225°C for 1 to 5 hours and then furnace-cooled, then subjected to second-stage solution treatment, in which the alloy is held at a temperature of 1115 to 1165°C for 1 to 5 hours and then air-cooled, and further subjected to aging treatment, in which the alloy is held at a temperature of 810 to 860°C for 22 to 26 hours.

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