Al-Cu合金中合金元素的热力学计算与分析

Constituent optimization of Al-Cu alloy based on thermodynamic calculation method

利用Jmat-Por软件,模拟计算Al-Cu合金的凝固路径及合金中主要相DO22、DO23的生成温度、生成数量随Zr和Ti元素含量变化的规律。结果表明,合金的微观组织与计算机模拟结果基本一致。热力学计算结果显示：在固定Ti含量为0.3%的条件下,DO22和DO23相的生成数量随Zr含量的增加而增加,生成温度区间分别为852~860℃与756~820℃;在固定Zr含量为0.35%的条件下,DO22和DO23相的生成数量随Ti含量的增加而增加,生成温度区间分别为819~859℃与779~820℃。

The solidification paths of Al-Cu alloy and variation of DO22,DO23 phases amount and crystallization temperatures with Zr and Ti contents were studied by thermodynamic calculation software Jmat-Por.The microstructural analysis is in agreement with the thermodynamic prediction.The thermodynamic calculation results indicate that when the content of Ti is 0.3%,the phases amount of DO22 and DO23 increases with the content of Zr,the crystallization temperatures range is 852 to 860 ℃ and 756 to 820 ℃,respectively.When the content of Zr is 0.35%,the phases amount of DO22 and DO23 increases with the content of Ti,the crystallization temperatures range is 819 to 859 ℃ and 779 to 820 ℃,respectively.