通过添加富镧、富铈、富钇和富钕混合稀土,考察了不同混合稀土加入量、不同冷却条件及其他因素对铝硅合金变质效果和含氢量的影响。结果表明,富钇、富镧、富铈混合稀土的变质效果依次减弱,富钕无明显变质效果。富铈、富镧、富钇和富钕混合稀土都能降低铝硅合金的含氢量,其去氢作用依次递减。 The effects of different misch metals, different cooling conditions and other factors on the metamorphism and hydrogen content of Al-Si alloys were investigated by adding lanthanum-rich, cerium-rich, yttrium-rich and neodymium-rich rare earths. The results show that the metamorphism of yttrium-rich, lanthanum-rich and cerium-rich mixed rare earth are weakened in turn, while the neodymium-rich alloy has no obvious metamorphism. The cerium-rich, lanthanum-rich, rich yttrium-rich and neodymium-rich mixed rare earths can reduce the hydrogen content of Al-Si alloy, and its dehydrogenation effect decreases in turn.