铸造技术2017，Vol.38Issue(12)：2854-2857,4.DOI:10.16410/j.issn1000-8365.2017.12.017
7075铝合金的热处理工艺与组织性能研究
Study on Heat Treatment Process and Microstructure Properties of 7075 Aluminum Alloy
韩静国 1焦中庆2
作者信息
- 1. 山西机电职业技术学院材料工程系,山西长治046011
- 2. 淮海工业集团有限公司,山西长治046012
- 折叠
摘要
Abstract
The effect of solid solution and aging heat treatment on microstmcture,hardness and tensile mechanical properties of wrought alloy 7075 were investigated,and the fracture morphology was observed.The results show that the main second phases in wrought 7075 alloy are Al7Cu2Fe,MgZn2 and Al2CuMg phase.After solid solution treatment at different temperatures,the MgZn2 phase at grain boundary solution to the matrix;and when the solution temperature is 480 ℃,only Al7Cu2Fe phase can be found in the alloy.With the increase of the solution temperature,the microhardness increases and then decreases,and get the maximum value when the solution temperature is 470 ℃.With the increase of solution time,the microhardness increases and then decreases,and obtain the maximum value when the holding time is 240 min.When the aging time extended from 12 h to 24 h and 36 h,the tensile strength and yield strength will increase,while the elongation decrease slightly.A good strength and plasticity can be obtained when the 7075 alloy is solution at 470 ℃ for 240 min and ageing at 125 ℃ for 24 h.关键词
7075合金/固溶/时效/组织/性能Key words
7075 alloy/solid solution/aging/microstructure/properties分类
矿业与冶金引用本文复制引用
韩静国,焦中庆..7075铝合金的热处理工艺与组织性能研究[J].铸造技术,2017,38(12):2854-2857,4.
