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采用正交设计法确定７０２０８合金Ｔ６及Ｔ６５１状态板材新的时效制度（８０±５℃／８ｈ＋１２０±５℃／２４ｈ），使这种材料的力学性能完全达到了法国国家标准《ＮＦＡ０３—２５１》。
Orthogonal design method was used to determine the new aging system of T20 and T651 alloy plates (80 ± 5 ℃ / 8h + 120 ± 5 ℃ / 24h). The mechanical properties of this material completely met the French national standard “NFA03-251”.