固溶时效对7050铝合金线材组织性能的影响  

Effect of solution aging on microstructure and properties of 7050 aluminum alloy wire

作　　者：高新宇 高冠军[1,3] 韩明明 付金来 GAO Xin-yu;GAO Guan-jun;HAN Ming-ming;FU Jin-lai(General Research Institute for Nonferrous Metals,Beijing 101407,China;Northeast Light Alloy Co.,Ltd.,Beijing 101407,China;GRIMAT Engineering Institute Co.,Ltd.,Harbin 150060,China)

机构地区：[1]北京有色金属研究总院,北京101407 [2]东北轻合金有限责任公司,北京101407 [3]有研工程技术研究院有限公司,黑龙江哈尔滨150060

出　　处：《轻合金加工技术》2022年第11期28-32,共5页Light Alloy Fabrication Technology

摘　　要：试验研究了固溶时效工艺对7050铝合金线材组织性能的影响。结果表明:在固溶温度为465℃~485℃范围内,配以适当的时效工艺,合金线材性能较好且波动不大。单级时效温度为100℃~140℃,时效时间为12 h~36 h时,合金线材强度超出指标要求;晶界上分布不连续细小的析出相,晶内形成大量细小η′相。合金线材经475℃1 h固溶处理和121℃7 h+177℃双级时效处理后,晶界析出相呈断续状,存在明显的PFZ,晶内的η′相急剧粗化;随着二级时效时间的延长,析出相粗化程度加剧,合金线材强度降低,第二级时效时间在6 h~10 h之间时,合金强度符合性能指标要求。The effect of solution aging process on the microstructure and properties of 7050 aluminum alloy wire was studied.The results show that the alloy wire has good properties with little fluctuation when the solution temperature range is 465℃-485℃and the appropriate aging process is used.When the single stage aging temperature is 100℃-140℃and the aging time is 12 h-36 h,the strength of the alloy wire exceeds the index requirements;discontinuous fine precipitates are distributed on the grain boundary,and a large number of fineη′phase particles are formed in the crystal.After solution at 475℃for 1 h and the two-stage aging at 121℃for 7 h and at 177℃,the precipitates at the grain boundary of the alloy are discontinuous,with obvious PFZ and rapidly-coarsenedη′phase;The coarsening degree of precipitates increases with the extension of secondary aging time and the strength of the alloy wire decreases.When the second aging time is between 6 h and 10 h,the strength of the alloy meets the performance requirements.

关 键 词：7050铝合金 固溶处理 时效处理 析出相 

分 类 号：TG375.4[金属学及工艺—金属压力加工]