热处理工艺对微量Mn、Zr作用下的高纯Al-Cu-Mg-Ag合金性能的影响

Effect of Heat Treatments on Properties of High Purity Al-Cu-Mg-Ag Alloy with Trace Mn and Zr

摘要:

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。

关键词:Al-Cu-Mg-Ag;峰时效;固溶处理;时效处理

Abstract:

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.

Key words:Al-Cu-Mg-Ag; peak ageing; solution treatment; ageing treatment