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通过试验系统地研究了LD7铝合金的单级和两级时效工艺、结果表明，与传统的单级时效相比，两级时效在不降低室温强度、硬度的前提下，可显著提高合金的电导率及高温性能。
The single-stage and two-stage aging process of LD7 aluminum alloy was systematically investigated through experiments. The results show that the two-stage aging can significantly improve the electrical conductivity of the alloy without reducing the strength and hardness at room temperature Rate and high temperature performance.