CAJ | 학술논문

采用富镧混合稀土对Al-Si-Mg系A357合金进行了变质处理，研究了稀土变质对合金铸态、热处理态的组织、力学性能及含氢量的影响，并与锶变质处理进行了比较。富镧混合稀土比锶有更强的变质A357合金中共晶硅的能力，更好的除氢效果和综合力学性能。稀土变质可获得高强韧性的Al-Si-Mg合金。
채용부란혼합희토대Al-Si-Mg계A357합금진행료변질처리， 연구료희토변질대합금주태 、 열처리태적조직、 역학성능급함경량적영향， 병여송변질처리진행료비교。 부란혼합 희토비송유경강적변질A357합금중공정규적능력， 경호적제경효과화종합역학성능。 희토 변질가획득고강인성적Al-Si-Mg합금。
A357 alloy, one of Al-Si-Mg system alloys, was modified with La-rich mischmet al, and modification effect of the mischmetal on its as-cast and heattrea ted structures, mechanical properties and hydrogen content were investigated and compared with that of strontium metal. It is shown that modification effect of La-rich mischmetal is better than that of strontium in the aspects of refining eutectic silicon, ejecting hyodrogen from the melt and improving comprehensive m echanical properties of the alloy, and therefore, Al-Si-Mg system alloy with h igh strength and improved toughness can be obtained using La-rich mischmetal mo difier.