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

2006-02-14

2006-02-14

Wyszomierski, George (Department: 1742)

Metal treatment

Stock

Age or precipitation hardened or strengthened

C420S448000

Reexamination Certificate

active

06997994

ABSTRACT:
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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“Precipitation in Alloy 718: a combined AEM and APFIM investigation,” Chemical Abstracts vol. 117, No. 2, abstract No. 12542, p. 341, paragraph 3, p. 342, paragraph 1; Figure 9, Burke, et al.Super alloys 718, 625 and Various Derivatives, The Minerals, Metals & Materials Society (1991)(XP009002251).

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