C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 1/04 (2006.01) B22F 7/02 (2006.01) B22F 7/06 (2006.01) F02F 3/00 (2006.01)
Patent
CA 2382104
A preliminarily formed article (10) which is manufactured by subjecting two or more types of aluminum alloy powders which comprise 1 to 15 wt. % of one or more of transition metals selected from among Fe, Cr, Ni, Zr, Mn and Mo, 10 to 30 wt. % of Si, 0.5 to 5 wt % of Cu, 1 to 5 wt. % of Mg, the balance being substantially Al, have a crystal grain diameter of 0.05 µm to 2 µm, have a power particle diameter of 30 µm to 1000 µm, and are different from one type to another with respect to the contents of transition metals to solidificating forming into a single-piece construction, wherein at least part (1) of the outer surface of the article is a functionally graded layer containing a transition metal in an amount greater than those in other parts (2) thereof; and a formed article (100), such as a part for an internal combustion engine, which is manufactured by the plastic working of the preliminarily formed article.
L'invention porte sur un article préformé (10) obtenu par frittage en une seule pièce d'une ou plusieurs poudres d'alliage d'aluminium comportant: de 1 à 15 % en poids d'un ou plusieurs métaux de transition choisis parmi Fe, Cr, Ni, Zr, Mn et Mo, de 10 à 30 % en poids de Si; de 0,5 à 5 % en poids de Cu, de 1 à 5 % en poids de Mg, le reliquat étant essentiellement de l'Al, dont le diamètre du grain des cristaux est de 0,05 à 2 µm, et le diamètre des particules de poudre, de 30 à 1000 µm, et qui diffèrent les unes des autres quant à la teneur en métaux de transition, une partie (1) au moins de la surface dudit article consistant en une couche graduelle dont la teneur en métaux de transition dépasse celle des autres parties (2), et sur un article formé (100) tel qu'une pièce de moteur à combustion interne, obtenu par déformation plastique du susdit article préformé.
Fujino Setsuo
Kuroishi Noushi
Yasu Eiji
Kubota Corporation
Marks & Clerk
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