Al-Mg-Zn合金成分的正交优化分析

Orthogonal analysis for composition of Al-Mg-Zn alloy

为提高Al-Mg-Zn合金的力学性能,采用正交回归设计方法对Al-Mg-Zn合金的化学成分进行了调整和优化分析,研究了Al-Mg-Zn合金中Mg、Zn等元素含量及其交互作用对合金力学性能和组织的影响.经实验验证确定了最佳合金成分比:在铸造状态下,当Mg含量(质量分数)为3 5%～4 5%,Zn含量(质量分数)为3 0%～4 5%时,合金综合力学性能最好;而在热处理(T4)状态下,当Mg含量为5 0%～6 0%,Zn含量为3 5%～4 5%时,合金具有最佳的综合力学性能.

In order to improve the mechanical properties of casted Al-Mg-Zn alloy, the chemical composition of Al-Mg-Zn alloy was optimized by orthogonal regression and the interplaying influence of alloying element of Mg and Zn on the mechanical properties of Al-Mg-Zn alloy was analyzed. The optimum composition of the alloy was established through experiments. The experimental results show that the best mechanical properties of ascast Al-Mg-Zn alloy is obtained when Mg content is in the range of 35%～45% and Zn content is 30%～45%, and the best mechanical properties of astreated (T4)Al-Mg-Zn alloy is obtained when Mg content is in the range of 50%～60% and Zn content is in the range of 35%～45%.