电焊机2011，Vol.41Issue(11)：15-19,43,6.
高速列车A7N01S-T5铝合金焊接接头晶间腐蚀性能研究
Research on the intergranular corrosion of welding joint of A7N01S-T5 Al-Alloy for high-speed train
摘要
Abstract
This paper studied the intergranular corrosion property of A7N01-T5 Al-alloy and its welding joint.The weight loss, hardness change and morphology of section and surface after corrosion were tested.The result showed that the corrosion rate of welding joint was higher than that of the base,the heat affected zone(HAZ) was corroded severely and the corrosion extended along grain boundary and connected as network.Zn2Mg strengthening phase of HAZ segregated continuously along grain boundary under the affected of heat-input of welding.This zinc-rich phase was anode in corrosion cell for its low potential and this made it dissolve preferentially thus forming active corrosion route along grain boundary,which made further corrosion develop into inner alloy.关键词
高速列车/A7N01 S-T5铝合金/焊接接头/晶间腐蚀Key words
high speed train/A7N01S-T5 aluminum alloy/welded joint/intergranular corrosion分类
矿业与冶金引用本文复制引用
王晓敏,苟国庆,刘艳,陈辉,孟立春..高速列车A7N01S-T5铝合金焊接接头晶间腐蚀性能研究[J].电焊机,2011,41(11):15-19,43,6.基金项目
国家科学支撑计划资助项目(2009BAG12A07) （2009BAG12A07）
