The solidification behavior of A357 alloy was analyzed by the DTA at various cooling rates.
通过不同冷却速率下的DTA试验研究了A357合金的凝固行为；
The effect of counter-pressure casting parameters on secondary dendrite arm spacing (SDAS)of A357 alloy was studied.
研究了差压铸造不同工艺参数对A357合金二次枝晶间距的影响。
The results show that the compound modification can greatly improve the mechanical properties of the alloy, which can satisfy the demand of A357 alloy sand casting.
结果表明，采用复合变质法可大大提高A357合金的力学性能，处理后其能满足该合金砂型铸造的使用要求。
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