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研究了铈基混合稀土对砂型铸造ZnAl-12组织及冲击韧性的影响。稀土能够细化晶粒,改变组织形态,吸附有害杂质铁元素;稀土加入量约0.12wt%时可提高冲击韧性1倍左右。
The effect of cerium-based mischmetal on the microstructure and impact toughness of sand casting ZnAl-12 was studied. Rare earth can refine grains, change the morphology of the structure, adsorption of harmful impurities, iron; Rare earth added about 0.12wt% can improve the impact toughness about 1 times.