摘要
通过金相、导电率、显微硬度和力学性能实验研究了Si和热处理制度对光伏支架用5005铝合金型材组织与性能的影响。结果表明,适当的增加Si含量可以有效提高5005铝合金的强度。当时效制度为185℃6h时高Si含量的5005铝合金的抗拉强度和屈服强度分别比低Si合金的增加55 N/mm^(2)和65 N/mm^(2),同时仍保留了较高的伸长率。高Si含量5005铝合金的强化包括第二相强化和固溶强化,强度性能最大提升为62%。合金的S曲线显示,Si元素的增加略微改变了合金的相变类型,有一部分的强化析出物是由片状物增厚变成了针状物增厚。
The effects of Si and heat treatment on the microstructure and properties of 5005 aluminum alloy profile for photovoltaic support were studied by metallographic,electrical conductivity,microhardness and mechanical properties experiments.The results show that the strength of 5005 aluminum alloy can be improved by increasing Si content accordingly.When aging system is 185℃6h,the tensile strength and yield strength of 5005 aluminum alloy with high Si content increase by 55 N/mm^(2)and 65 N/mm^(2)respectively compared with that of low Si alloy,while the higher elongation is still maintained.The strengthening mechanism of 5005 aluminum alloy with high Si content includes the second phase strengthening and solution strengthening,and the maximum strength property improved is 62%.The S-curve of the alloy shows that the increase of Si element slightly changes the phase transformation type of the alloy,and part of the strengthening precipitates are thickened from flakelike to needle-like.
作者
王岗
李进
郝菊萍
WANG Gang;LI Jin;HAO Ju-ping(Guangya Aluminum Co.,Ltd.,Foshan 528237,China)
出处
《轻合金加工技术》
CAS
2021年第6期54-59,共6页
Light Alloy Fabrication Technology
关键词
5005铝合金
SI含量
热处理
强化机制
析出动力学
5005 aluminum alloy
Si content
heat treatment
strengthening mechanism
precipitation kinetics
