Method for manufacturing aluminum alloy by permeating molten aluminum alloy containing silicon through preform containing metallic oxide and more finely divided substance

摘要: In this method for manufacturing an aluminum alloy, a porous preform is manufactured from mixture of finely divided oxide (26) metallic element which has weaker tendency to form than does aluminum, and additional substance (28) substantially more that oxide. Then alloy containing substantial quantity silicon permeated in the molten state through preform. This causes be reduced by thermite reaction, leave metal it included as alloyed with alloy. At time, not tend crystallize out upon particles oxide, would interfere such reduction reaction forming crystalline shells around lead poor final product, because instead tends substance. alloying effective even if average particle diameter on assumption globular particles, less about 10 microns. The melting point should desirably higher content may freely greater 1.65% weight. Desirably, further contain reinforcing fibrous material (30). And, particularly, A1203.