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。
Microstructure and corrosion resistance of high alloyed Al-12.3Zn-3Mg-2.5Cu-0.18Zr-0.07Sr aluminum alloy treated by solutionaging and solution-cold extrusion-aging were studied.The results show that the grains of the high alloyed aluminum alloy treated by solutionaging 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.
作者
韦宏博
许晓静
朱亮亮
汪洋
吴华锋
朱劲松
Wei Hongbo;Xu Xiaojing;Zhu Liangliang;Wang Yang;Wu Huafeng;Zhu Jingsong(Engineering Institute of Advanced Manufacturing and Modem Equipment Technology,Jiangsu University,Zhenjiang Jiangsu 212013,China;Jiangsu Townsun Auto Parts Co.,Ltd.,Nantong Jiangsu 226534,China;Nantong Honest Machinery Co.,Ltd.,Nantong Jiangsu 226600,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第9期46-50,共5页
Heat Treatment of Metals
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
high alloyed 7000 series aluminum alloy
cold extrusion
microstructure
intergranular corrosion
exfoliation corrosion
