Iron-based powder blend for use in powder metallurgy

Details Iron-based powder blend for use in powder metallurgy Iron-based powder blend for use in powder metallurgy

C - Chemistry, Metallurgy

22

C

C22C 33/02 (2006.01) B22F 7/00 (2006.01)

Patent

CA 2319830

An iron-based powder blend for use in powder metallurgy, which comprises an atomized alloy iron powder, 0.01 to 1.0 % in terms of B of one or more of compounds containing B, 1 to 10 % of Ni powder, 1 to 6 % of Cu powder and 1.3 to 3.0 % of graphite powder, each percentage being based on the total weight of the above materials; and 0.5 to 2.0 parts by weight of a lubricant based on 100 parts of the total weight of said materials, wherein the atomized alloy iron powder has the composition in wt %: Mn: 0.03 to 1.00 %, Cr: 0.5 to 4.0 %, S: 0.03 to 0.3 %, balance: Fe and inevitable impurities. The iron-based powder blend can be used for producing a sintered compact which has good sliding characteristics being small in variation and excellent impact resistance, and also capability of being reformed.

La présente invention concerne un mélange de poudre métallique destiné à être utilisé en métallurgie des poudres. Ce mélange comprend une poudre métallique d'alliage atomisé, 0,01 à 1,0 % de B d'un ou de plusieurs composés renfermant B, 1 à 10 % de poudre Ni, 1 à 6 % de poudre Cu et 1,3 à 3,0 % de poudre de graphite, chaque pourcentage étant basé sur la poids total des matériaux précités; 0,5 à 2,0 parties en poids d'un lubrifiant basé sur 100 parties du poids total de ces matériaux, la poudre métallique de l'alliage atomisé contenant % poids: Mn: 0,03 à 1,00 %, Cr:0,5 à 4,0 %, S: 0,03 à 0,3 %, moyenne: Fe et des impuretés inévitables. En outre, on peut utiliser le mélange de poudre métallique pour produire un compact fritté présentant de bonnes caractéristiques de glissement, une petite variation et une très bonne résistance aux chocs, ainsi qu'une aptitude à la remise en forme.

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