EP 0141350 B1 19880907 - METHOD OF PREPARING WORK PIECES FROM METAL POWDER
Title (en)
METHOD OF PREPARING WORK PIECES FROM METAL POWDER
Publication
Application
Priority
DE 3338369 A 19831021
Abstract (en)
[origin: US4565668A] 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.
IPC 1-7
IPC 8 full level
B22F 3/04 (2006.01); B22F 3/12 (2006.01); B22F 5/12 (2006.01); B28B 3/00 (2006.01); B30B 11/00 (2006.01); C04B 35/64 (2006.01); C04B 35/645 (2006.01)
CPC (source: EP KR US)
B22F 3/02 (2013.01 - KR); B22F 3/04 (2013.01 - EP US); B22F 3/1233 (2013.01 - EP US); B22F 3/1241 (2013.01 - EP US); Y10S 29/031 (2013.01 - EP US); Y10T 428/1359 (2015.01 - EP US); Y10T 428/2975 (2015.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0141350 A1 19850515; EP 0141350 B1 19880907; DE 3338369 C1 19850926; DE 3473840 D1 19881013; JP S60145303 A 19850731; JP S6340843 B2 19880812; KR 850004035 A 19850701; US 4565668 A 19860121
DOCDB simple family (application)
EP 84112605 A 19841018; DE 3338369 A 19831021; DE 3473840 T 19841018; JP 22029284 A 19841019; KR 840006581 A 19841020; US 66829684 A 19841105