Precipitation-strengthened nickel-iron-chromium alloy

Details Precipitation-strengthened nickel-iron-chromium alloy Precipitation-strengthened nickel-iron-chromium alloy

2006-10-10

2006-10-10

Sheehan, John P. (Department: 1742)

Metal treatment

Stock

Nickel base

C148S442000, C420S452000, C420S453000, C420S584100, C420S586100

Reexamination Certificate

active

07118636

ABSTRACT:
An Fe—Ni—Cr alloy formulated to contain a strengthening phase that is able to maintain a fine grain structure during forging and high temperature processing of the alloy. The alloy contains a sufficient amount of titanium, zirconium, carbon and nitrogen so that fine titanium and zirconium carbonitride precipitates formed thereby are near their solubility limit in the alloy when molten. In the production of an article from such an alloy by thermomechanical processing, a dispersion of the fine titanium and zirconium carbonitride precipitates form during solidification of the melt and remain present during subsequent elevated processing steps to prohibit austenitic grain growth.

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