Method of making powder-metallurgical articles

Details Method of making powder-metallurgical articles Method of making powder-metallurgical articles

1984-11-05

1986-01-21

Lechert, Jr., Stephen J.

Powder metallurgy processes

Forming articles by uniting randomly associated metal particles

Consolidation of powders

419 42, 29DIG31, 75228, 264313, 428 35, 428398, B22F 100

Patent

active

045656681

ABSTRACT:
A method of making powder-metallurgical articles, in which powder of metal and/or metal alloys is filled into a thin-walled casing, whereupon the casing is closed and subjected to cold-isostatic pressure. Thereby the powder within the casing is compacted to form a strong or, respectively, dimensionally stable article. When the casing wall includes a joining weld seam, said casing wall is provided with an elastically expandable layer in the close vicinity of the weld seam in order to prevent formation of a fold, preferably in such a way that an approximately uniform prestress is applied to the wall surface.

REFERENCES:
patent: 1081618 (1913-12-01), Madden
patent: 3780418 (1973-12-01), Hurst
patent: 3862286 (1975-01-01), Couchman
patent: 3892030 (1975-07-01), DePierre et al.
patent: 4000235 (1976-12-01), Leemput

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