Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Post sintering operation
Patent
1996-01-22
1997-12-23
Jordan, Charles T.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Post sintering operation
419 41, 419 44, 148406, 148420, 75249, B22F 100
Patent
active
057015767
ABSTRACT:
The manufacturing method of plastically formed products prevents the generation of cracks at the time of plastic working, thereby increasing the productivity. It is also prevented that the metallic particles constituting the product become large and rough in structure. In the manufacturing method, only the compact treatment and the vacuum deaeration treatment are carried out prior to the extrusion treatment, without the pressure-heat treatment performed. Therefore, processing steps prior to the extrusion treatment are simplified, so that the productivity of the plastically formed products is improved and the metallic particles are prevented from being large and rough. The diffusion treatment between the extrusion treatment and the forging treatment enhances the adhesion at the inner part of the extruded material in the radial direction, whereby the generation of cracks at the time of plastic working is avoided.
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Fujita Makoto
Hirabara Shoji
Sakate Nobuo
Yamamoto Yukio
Chi Anthony R.
Jordan Charles T.
Mazda Motor Corporation
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