Nickel-chromium-tungsten base superalloy

Details Nickel-chromium-tungsten base superalloy Nickel-chromium-tungsten base superalloy

1994-09-06

1995-09-12

Simmons, David A.

Alloys or metallic compositions

Nickel base

Chromium containing

420448, 148428, C22C 1905

Patent

active

054494907

ABSTRACT:
The improved superalloy that possesses all the characteristics required of the high-temperature structural material of high-temperature gas-cooled reactors (i.e., high-temperature strength, corrosion resistance, good producibility, good hot workability and resistance to embrittlement due to thermal aging) consists essentially of 16-28% Cr, 15-24% W (provided that Cr+W=39-44%), 0.01-0.1% Zr, 0.001-0.015% Y, 0.0005-0.01% B, up to 0.05% C, up to 0.1% Si, up to 0.1% Mn (provided that Si+Mn.ltoreq.0.1%), up to 0.1% Ti, up to 0.1% Al and up to 0.1% Nb (provided that Ti+Al.ltoreq.0.1% and Ti+Al+Nb.ltoreq.0.15%), with the balance being Ni and inevitable impurities and all percentages being on a weight basis.

REFERENCES:
patent: 4006015 (1977-02-01), Watanabe et al.
patent: 4194909 (1980-03-01), Ohmura et al.
patent: 4227925 (1980-10-01), Hosoi et al.
patent: 4464210 (1984-08-01), Watanabe

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