Iron-based powders for powder metallurgy

Details Iron-based powders for powder metallurgy Iron-based powders for powder metallurgy

C - Chemistry, Metallurgy

22

C

C22C 1/05 (2006.01) B22F 1/00 (2006.01) C22C 33/02 (2006.01)

Patent

CA 2352116

An iron-based mixed powder for use in powder metallurgy has an apparent density of at least about 3.1 Mg/m3, is excellent in die filling property and compressibility and without segregation, and includes an iron-based powder to which alloying powder is adhered at the surface by binder and free lubricant. The iron-based powder includes an atomized iron powder, or a mixed powder of an atomized iron powder and a reduced iron powder, wherein the iron-based powder has a maximum particle size of less than about 180 µm and has a particle size distribution comprising about 18.5 mass % or less of particles with a particle size of less than about 45 µm, at least about 46 mass % of particles with a particle size of from about 75 µm to about 150 µm, and less than 10 mass % of particles with a particle size of from about 150 µm to about 180 µm.

Mélange de poudre à base de fer pour utilisation en métallurgie des poudres, excellent pour l'alimentation de filière, doté d'une excellente compressibilité et sans ségrégation. Il comprend une poudre de fer atomisé ou un mélange d'une poudre de fer atomisé et d'une poudre de fer réduit, dans laquelle les particules ont un diamètre maximal de moins d'environ 180  m, et dont la composition granulométrique comprend environ 18,5 % ou moins en masse de particules dont le diamètre est inférieur à environ 45  m, au moins environ 46 % de particules dont le diamètre se situe entre environ 75 et environ 150  m, et moins de 10 % en masse de particules dont le diamètre se situe entre environ 150 et environ 180  m.

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