金属热处理 ›› 2020, Vol. 45 ›› Issue (9): 46-49.DOI: 10.13251/j.issn.0254-6051.2020.09.007

• 工艺研究 • 上一篇    下一篇

冷挤压对高合金化7000系铝合金抗腐蚀性能的影响

韦宏博1, 许晓静1, 朱亮亮2, 汪洋2, 吴华锋2, 朱劲松3   

  1. 1.江苏大学 先进制造与现代装备技术工程研究院,江苏 镇江 212013;
    2.江苏汤臣汽车零部件有限公司,江苏 南通 226534;
    3.南通奥里斯特机械有限公司,江苏 南通 226600
  • 收稿日期:2020-03-23 出版日期:2020-09-25 发布日期:2020-12-29
  • 通讯作者: 许晓静,教授,E-mail:xjxu67@126.com
  • 作者简介:韦宏博(1996—),男,硕士研究生,主要研究方向为铝合金、铝基复合材料,E-mail:whb960315@163.com

Effect of cold extrusion on corrosion resistance of high alloyed 7000 series aluminum alloy

Wei Hongbo1, Xu Xiaojing1, Zhu Liangliang2, Wang Yang2, Wu Huafeng2, Zhu Jingsong3   

  1. 1. Engineering Institute of Advanced Manufacturing and Modern Equipment Technology,Jiangsu University,Zhenjiang Jiangsu 212013,China;
    2. Jiangsu Townsun Auto Parts Co.,Ltd.,Nantong Jiangsu 226534,China;
    3. Nantong Honest Machinery Co.,Ltd.,Nantong Jiangsu 226600,China
  • Received:2020-03-23 Online:2020-09-25 Published:2020-12-29

摘要: 研究了经固溶-时效和固溶-冷挤压-时效处理的高合金化Al-12.3Zn-3Mg-2.5Cu-0.18Zr-0.07Sr铝合金的微观组织与抗腐蚀性能。结果表明:固溶-时效和固溶-冷挤压-时效状态下高合金化铝合金的晶粒都呈现明显的带状分布,但固溶-冷挤压-时效状态下合金内部亚晶比例明显上升;相比固溶-时效,固溶-冷挤压-时效状态下高合金化铝合金的抗腐蚀性能(剥落腐蚀和晶间腐蚀)有明显的提高,可见冷挤压变形是提高7000系铝合金腐蚀性能的有效手段。

关键词: 高合金化7000系铝合金, 冷挤压, 微观组织, 晶间腐蚀, 剥落腐蚀

Abstract: Microstructure and corrosion resistance of high alloyed Al-12.3Zn-3Mg-2.5Cu-0.18Zr-0.07Sr aluminum alloy treated by solution-aging and solution-cold extrusion-aging were studied.The results show that the grains of the high alloyed aluminum alloy treated by solution-aging and solution-cold extrusion-aging show obvious zonal distribution,but the proportion of sub-grains in the solution-cold extrusion-aging treated alloy increases obviously.Compared with the solution-aging treatment,the solution-cold extrusion-aging treatment can obviously improve the corrosion resistance (exfoliation corrosion and intergranular corrosion) of the alloy,which means that cold extrusion can effectively improve the corrosion resistance of 7000 series aluminum alloy.

Key words: high alloyed 7000 series aluminum alloy, cold extrusion, microstructure, intergranular corrosion, exfoliation corrosion

中图分类号: