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研究了不同固溶处理温度和时间对A357合金组织及力学性能的影响规律。结果表明，在同样时效条件下，随固溶时间的延长，合金的δ均增加，δb先增加，后又有所下降。经545℃固溶的合金，其δb和δ均比535℃时稍有增加。随固溶温度的提高或时间的延长。Si相变得更加圆整和粗大；Fe相形态明显改善；Mg2Si的固溶量提高，对于含铁量较高的合金，采用高温固溶处理工艺，可以明显改善合金的强塑性。
The effects of different solution treatment temperature and time on the microstructure and mechanical properties of A357 alloy were studied. The results show that under the same aging condition, the δ of the alloy increases with the increase of solution time, and δb increases first and then decreases. After 545 ℃ solid solution alloy, its δb and δ slightly increased than 535 ℃. With the solution temperature increase or prolongation of time. Si phase becomes more round and coarse; Fe phase morphology improved significantly; Mg2Si solid solution increased, for high iron content alloy, high temperature solution treatment process, can significantly improve the alloy’s ductility.