通过电导率、力学性能测试和高分辨电镜分析研究了自然时效对7N01合金组织和性能的影响.结果表明:在自然时效中,由于过饱和固溶体不均匀析出与基体共格的析出相,合金电导率随着自然时效时间的延长逐渐降低,时效20d后基本达到稳定状态.合金的强度随着时效时间的延长逐渐增大,在20d后达到稳定,抗拉强度在400MP以上,屈服强度在260 MPa以上,合金的延伸率在自然时效1d后达到稳定值(约为15.5％).稳定态合金的强化相主要为尺寸较小的GPⅡ区.此外,弯折试验表明合金具有良好的弯折性能,在自然时效10 ～60 d内未出现肉眼可见的裂纹.
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