Ni based alloy, method for producing the same, and forging die

Details Ni based alloy, method for producing the same, and forging die Ni based alloy, method for producing the same, and forging die

C - Chemistry, Metallurgy

22

C

C22C 19/05 (2006.01) B21J 13/02 (2006.01) B21K 5/20 (2006.01) C21D 10/00 (2006.01) C22F 1/10 (2006.01)

Patent

CA 2403545

A solution treatment is firstly performed for a non-heat-treated Ni based alloy having a composition equivalent to that of Inconel 718 (registered trademark). Subsequently, a primary aging treatment is applied by holding the Ni based alloy at 610 to 660 °C for 5 to 10 hours. After that, a secondary aging treatment is performed by holding the Ni based alloy at 710 to 760 °C for 5 to 10 hours. There are 700 or more precipitates per µm2, in which each precipitate has a longer diameter of not less than 0.5 nm, in a metal microstructure of the Ni based alloy. Some of the precipitates are large precipitates having average diameters of 25 nm to 1 µm. There are 10 or more large precipitates per µm2. A forging die is produced with the Ni based alloy.

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