C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 33/02 (2006.01) B22F 3/02 (2006.01) B22F 3/03 (2006.01)
Patent
CA 2305136
A process for producing a sintered powder metal body is disclosed. A powdery mixture is prepared by blending a graphite powder in amount of not less than 0.3 % by weight with an iron based metal powder (51). The powdery mixture is compacted into a preform having a density of not less than 7.3 g/cm3 (52). The preform is sintered at a temperature of 800-1000 ~C to form the sintered powder metal body having a predetermined structure (53). The predetermined structure of the sintered powder metal body includes iron based metal particles and graphite particles retained between the iron based metal particles.
L'invention porte sur un procédé de fabrication de corps en poudre (51) de métal fritté consistant à préparer un mélange pulvérulent de poudre de graphite à raison d'au moins 0,3 % en poids, et de poudre métallique à base de fer. Ledit mélange est compacté en une préforme d'une densité d'au moins 7,3 g/cm?3¿ (52), puis la préforme est frittée à une température de 800-1000 ·C pour constituer un corps fritté d'une structure (53) prédéterminée laquelle comporte des particules métalliques à base de fer et des particules de graphite emprisonnées entre elles.
Amma Hiroyuki
Fujinaga Masashi
Yoshimura Takashi
Kawasaki Steel Corporation
Robic
Unisia Jecs Corporation
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