Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1997-12-08
1999-08-10
Yee, Deborah
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148537, C21D 900
Patent
active
059353538
ABSTRACT:
A coated Ni base superalloy article is provided with improved microstuctural stability under a coating at least partially diffused into an article surface portion, by avoiding the formation, after exposure to elevated temperatures, of a constituent called SRZ which can affect detrimentally mechanical properties of the article. Such avoidance can result from neutralizing stress in the article surface portion prior to coating, for example by physically removing the stressed portion or by recrystallizing the stressed portion to a fine grained structure which subsequently can be consumed by diffusing elements in a coating method. Also, such avoidance can result from maintaining a Re segregation factor, Re.DELTA., between dendrite cores and interdendritic regions of the alloy cast structure at no greater than about 40%.
REFERENCES:
patent: 3802938 (1974-04-01), Collins et al.
patent: 3960647 (1976-06-01), Faure et al.
patent: 4116723 (1978-09-01), Gell et al.
patent: 4222794 (1980-09-01), Schweizer et al.
patent: 4318753 (1982-03-01), Anderson, Jr. et al.
patent: 4401480 (1983-08-01), Crombie, III
patent: 4643782 (1987-02-01), Harris et al.
patent: 4677035 (1987-06-01), Fiedler et al.
patent: 4717432 (1988-01-01), Ault
patent: 4721540 (1988-01-01), Harris et al.
patent: 4729799 (1988-03-01), Henricks et al.
patent: 4935072 (1990-06-01), Nguyen-Dinh
patent: 5077141 (1991-12-01), Naik et al.
patent: 5100484 (1992-03-01), Wukusick et al.
patent: 5151249 (1992-09-01), Austin et al.
patent: 5154884 (1992-10-01), Wukusick et al.
patent: 5173255 (1992-12-01), Ross et al.
patent: 5270123 (1993-12-01), Walston et al.
patent: 5366695 (1994-11-01), Erickson
patent: 5455120 (1995-10-01), Walston et al.
patent: 5482789 (1996-01-01), O'Hara et al.
patent: 5516380 (1996-05-01), Darolia et al.
patent: 5523170 (1996-06-01), Budinger et al.
patent: 5538796 (1996-07-01), Schaffer et al.
patent: 5562999 (1996-10-01), Grunke et al.
patent: 5598968 (1997-02-01), Schaeffer et al.
Murphy Wendy H.
Walston William S.
General Electric Company
Hess Andrew C.
Narciso David L.
Yee Deborah
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