Columnar crystalline Ni-based heat-resistant alloy having high r

Details Columnar crystalline Ni-based heat-resistant alloy having high r Columnar crystalline Ni-based heat-resistant alloy having high r

1998-01-23

2000-03-14

Yee, Deborah

Metal treatment

Stock

Directionally solidified

148555, 148556, 148410, 148428, C22C 1905, C22F 110

Patent

active

060367911

ABSTRACT:
An Ni-base heat resistant alloy, has a composition which contains, by weight, Cr: from 12.0 to 14.3%, Co: from 8.5 to 11.0%, Mo: from 1.0 to 3.5%, W: from 3.5 to 6.2%, Ta: from 3.0 to 5.5%, Al: from 3.5 to 4.5%, Ti: from 2.0 to 3.2%, C: from 0.04 to 0.12%, B: from 0.005 to 0.05%, and the balance substantially Ni and inevitable impurities. A large-size casting, as well as a large-size turbine blade, having a columnar crystalline Ni-base heat-resistant alloy formed from the Ni-base heat-resistant alloy, have sound cast surfaces and a sound internal structure.

REFERENCES:
patent: 5100484 (1992-03-01), Wukusick et al.
patent: 5154884 (1992-10-01), Wukusick et al.
patent: 5516381 (1996-05-01), Kawai et al.

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