| 摘要 |
A mixture of a hypereutectic Al-Si-Cu-Mg first powder, a near eutectic Al-Si second powder containing 9-13 % by weight silicon, and a third powder which is pure aluminium or a hypoeutectic aluminium alloy containing alloying constituents other than silicon and less than 9 wt% silicon, with a sintering aid comprising a fourth zinc-containing powder is pressed and sintered form a component. The relative weight proportions of the first and second powders lie in the range 35:65 65:35 and the third powder comprises up to 35 % by weight of the first, second and third powders. The first second and third powders are non-annealed atomized powders. The mixture can also comprise a solid lubricant such as graphite. |
