| 摘要 |
<p>A strontium-silicon-aluminum master alloy for modifying the eutectic component of eutectic and hypo-eutictic aluminumsilicon casting alloys comprises 3 to 20 percent by weight strontium, 4 to 28 percent by weight silicon, each of said elements being present throughout the recited ranges, and the balance essentially aluminum. The master alloy is prepared by adding a strontium compound (e.g., a strontium silicide) to molten aluminum at a temperature of between about 1450.degree. and 2100.degree.F.</p> |
