研究了固溶处理和时效处理对微量Mn、Zr作用下的高纯Al-Cu-Mg-Ag合金性能的影响,结果表明:合金在520~525 ℃时,可以得到较好的力学性能,固溶时间对性能的影响不大.合金在160 ℃下时效12 h可以达到峰时效,而在180 ℃下达到峰时效的时间仅需要4 h.向Al-Cu-Mg-Ag中添加微量Mn、Zr元素可以大幅度的提高合金的延伸率,但Mn元素的添加却降低合金的抗拉强度,而Zr元素则大幅度的提高了合金的抗拉强度.在合金的耐热性能方面,微量Mn、Zr元素的添加均显著提高Al-Cu-Mg-Ag合金的热稳定性.
Effects of solid solution heat treatment and aging heat treatment on high purity Al-Cu-Mg-Ag alloys with trace Mn and Zr were investigated. Results show that when the alloys are solid solution treated at 520-525 ℃, the mechanical properties reach up to a relatively high level, and the solid solution time has little effect on the properties. The time to reach peak aging is about 12 h at 160 ℃ but only 4 h at 180 ℃. Adding trace Mn and Zr could increase the elongation of Al-Cu-Mg-Ag alloys greatly. However, Mn element could decrease the tensile strength while Zr could increase it significantly. Both Mn and Zr elements can improve the heat resistance of Al-Cu-Mg-Ag alloys markedly.
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