研究了铸造Al-4.5Cu合金的准固态力学行为及几种合金元素对其凝固行为的影响.结果表明:Si,Ce,La,Ti及Zr元素可有效减小Al-4.5Cu合金的结晶范围,从而使其热裂倾向性降低;La元素的加入可提高Al-4.5Cu合金的热裂抗力;并研制了一种新型Al-4.5Cu合金,该合金具有良好的室温与高温综合性能.
The effect of alloying elements on the quasi-solid mechanical properties and on the solidification behavior of alloy Al-4.5Cu have been studied in the present paper. The results indicated that Si, Ce, La, Ti and Zr elements can effectively narrow the gap of crystallization range and reduce the hot cracking tendency of Al-4.5Cu, and the addition of La can increase hot crack resistance properties of Al-4.5Cu alloy. A new type of casting Al-4.5Cu alloy has been successfully developed based on the results of the study, which has been used in some areas for its good comprehensive properties at both ambient and elevated temperatures.
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