| 摘要 |
A method of increasing the hardness of an aluminumsilicon composite comprising aluminum as the principal metal, with silicon, magnesium and copper in substantial amounts, iron, titanium, manganese and zinc in lesser amounts and a substantial amount of a non-metal filler such as zircon, alumina, zirconia or aluminum silicates, wherein the composite is subjected to a three-stage heat treatment comprising a solution heat treatment followed by a first and second precipitation heat treatment.
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