利用Jmat-Pro热力学相图计算软件模拟Al-Zn-Mg-Cu合金的凝固路径以及该合金中MgZn2、Al2CuMg、Al2Cu和Al2Mg3Zn3相生成数量和生成温度随Zn、Mg和Cu含量变化的关系曲线;分析实验合金的微观组织.检测结果与热力学计算结果一致.热力学计算结果表明,在7150合金的成分优化过程中,当Zn、Mg和Cu元素的质量分数分别为6.4%～6.9%、2.3%～2.5%和2.0%～2.2%时,合金凝固组织中MgZn2相的生成数量可达4.5%～6.0%,同时,Al2CuMg相的生成数量可控制在0.5%以下.
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