【摘要】 共晶铝硅合金中的针状铁相经高温处理后,在金属型铸造条件下呈球状。含0.8％～1.8％Fe的Al-Si合金,针状铁相球化后,机械性能明显提高,其中含铁为1.8％的合金,室温抗拉强度提高83％,高温延伸率提高80％。球化后的铁相形貌具有重熔性。更多还原

【Abstract】 The needle form of iron compounds in an eutectic Al-Si alloy has been changed into spheroidal form after the alloy is heated to a high temperature and poured into a permanent mold. The mechanical properties of the alloy containing 0.8%~1.8% Fe have become much better obviously due to the spheroidization of needle iron compounds with spheroidized, iron compunds, the room-temperature tensile strengh of the alloy containing 1. 8%Fe is increased by 83% , the elongation at 300C is increased by 80% as compared with the alloy whose iron compounds were of needle form. The spheroidal form of the iron compounds could be remained after remelting.更多还原