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Machine translation
1. (WO1980001769) A PROCESS FOR USE WHEN PRODUCING A PART BY POWDER METALLURGYMETHODS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/001769    International Application No.:    PCT/SE1980/000051
Publication Date: 04.09.1980 International Filing Date: 26.02.1980
IPC:
B22F 3/14 (2006.01), B22F 3/15 (2006.01), C23C 16/00 (2006.01)
Applicants:
Inventors:
Priority Data:
7901678 26.02.1979 SE
Title (EN) A PROCESS FOR USE WHEN PRODUCING A PART BY POWDER METALLURGYMETHODS
(FR) PROCEDE UTILISE POUR LA PRODUCTION D"UNE PIECE PAR DES PROCEDES RELEVANT DE LA METALLURGIE DES POUDRES
Abstract: front page image
(EN)When producing parts by powder metallurgy methods a metallic powder (3) is compressed to a basic porous blank or so called green preform, which by isostatic hot-pressing or forging in a tool is further compressed to the shape of the required part. In order to increase the wear resistance of the part the green preform is before hot-pressing or forging exposed to a gas mixture in a so called CVD-process (Chemical Vapour Deposition). During the exposure to the gas mixture a thin layer of hard material (6) is deposited on the surface and in the pores (4) of the green preform. The tool for hot-pressing or forging is protected from wear by depositing in the CVD-process an additional thin layer (7) on the top of the first layer of hard material (6). This additional layer is softer than the first layer and could preferably be of the same kind as the metallic powder.
(FR)Lors de la production de pieces par des procedes relevant de la metallurgie des poudres, une poudre metallique (3) est comprimee en un flan de base poreux ou preforme qui par estampage ou forgeage a chaud isostatique dans un outil, est comprime a nouveau pour prendre la forme de la piece requise. De maniere a augmenter la resistance a l"usure de la piece, la preforme est, avant l"estampage ou forgeage a chaud, exposee a un melange gazeux dans un procede CVD (depot par vapeur chimique). Pendant l"exposition au melange gazeux, une fine couche de materiau dur (6) est deposee sur la surface et dans les pores (4) de la preforme. L"outil d"estampage ou forgeage a chaud est protege contre l"usure par depot dans le procede CVD d"une fine couche supplementaire (7) par dessus la premiere couche de materiau dur (6). Cette couche supplementaire est plus molle que la premiere couche et pourrait etre, de preference, du meme genre que la poudre metallique.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)