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研究了Al-10%Sr中间合金不同的加入量、加入温度、保温时间对A357合金变质效果的影响。结果表明:Al-Sr合金具有较好的变质作用,加入量为0.02%Sr为宜,加入温度740℃以上;与Na变质相比,Sr变质具有长效性。
The effect of different addition amount of Al-10% Sr master alloy, addition temperature and holding time on the modification of A357 alloy was studied. The results show that Al-Sr alloy has a good metamorphism, with addition of 0.02% Sr is advisable, and the addition temperature is above 740 ℃. Sr metamorphism has long-lasting effect compared with Na metamorphism.