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1. WO1980001769 - A PROCESS FOR USE WHEN PRODUCING A PART BY POWDER METALLURGYMETHODS

Publication Number WO/1980/001769
Publication Date 04.09.1980
International Application No. PCT/SE1980/000051
International Filing Date 26.02.1980
IPC
B22F 3/14 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
12Both compacting and sintering
14simultaneously
B22F 3/15 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
12Both compacting and sintering
14simultaneously
15Hot isostatic pressing
C23C 16/00 2006.01
CCHEMISTRY; METALLURGY
23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
16Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition (CVD) processes
CPC
B22F 3/14
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; ; Presses and furnaces
12Both compacting and sintering
14simultaneously
B22F 3/15
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; ; Presses and furnaces
12Both compacting and sintering
14simultaneously
15Hot isostatic pressing
C23C 16/00
CCHEMISTRY; METALLURGY
23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
16Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
Applicants
Inventors
Priority Data
790167826.02.1979SE
Publication Language English (EN)
Filing Language English (EN)
Designated States
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
(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.
Also published as
DE3034325
NO19803152
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