Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making composite or hollow article
Patent
1983-10-17
1985-10-01
Schofer, Joseph L.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Making composite or hollow article
419 49, 419 60, 428554, 425405H, 291567R, 29DIG31, 138140, 138143, 148 115P, 148 115Q, B21D 5300
Patent
active
045445230
ABSTRACT:
A method for producing an alloy article, such as a valve or valve component, and an assembly for use therewith. The article is produced by hot isostatic compacting wherein a lining of prealloyed powdered metal of an alloy composition different than that of the remainder of the article is confined on a surface of an internal passage or cavity in the article. A solid lining element is provided contiguous with at least a portion of the powdered metal lining the surface of said internal passage, the lining element is of an alloy also different from that of the remainder of the article. The powdered metal and solid lining element are heated and then hot isostatically pressed to densify and bond the powdered metal and the lining element to the surface of the internal passage of the article to provide a clad lining of dissimilar metal.
REFERENCES:
patent: 3499066 (1970-03-01), Murray
patent: 3552938 (1971-01-01), Draca
patent: 4016008 (1977-04-01), Forbes Jones et al.
patent: 4017576 (1977-04-01), Freed et al.
patent: 4065302 (1977-12-01), Turillon
patent: 4477955 (1984-10-01), Becker et al.
McCollough William L.
Wulczynski Frank J.
Crucible Materials Corporation
Mullen, Jr. Clair X.
Schofer Joseph L.
Teskin Fred M.
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