高温预析出热处理工艺对7N01铝合金应力腐蚀的影响  

Effect of High Temperature Pre-Precipitation Heat Treatment Process on Stress Corrosion of 7N01Aluminum Alloy

作　　者：郑奇峰 徐飞 李安敏 孔德明 ZHENG Qifeng;XU Fei;LI Anmin;KONG Deming(Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured Materials,School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学资源环境与材料学院广西大学广西有色金属及特色材料加工重点实验室,南宁530004

出　　处：《腐蚀与防护》2020年第4期23-27,共5页Corrosion & Protection

摘　　要：对T4热处理态的7N01铝合金进行高温预析出热处理(470℃×1h+400℃×30min+120℃×24h)。采用慢应变速率试验(SSRT)研究了高温预析出热处理工艺对7N01铝合金抗应力腐蚀开裂(SCC)性能的影响。结果表明:高温预析出工艺可以明显提高T4热处理态7N01铝合金的抗SCC性能和塑性,同时保持较高的抗拉强度。A heat treatment process of high temperature pre-precipitation(470℃×1h+400℃×30min+120℃×24h)was conducted on 7N01aluminum alloy in T4heat treatment state.And slow strain rate testing(SSRT)was used to study the effects of high temperature pre-precipitation heat treatment on the stress corrosion cracking(SCC)resistance of 7N01aluminum alloy in T4heat treatment state.The results show that high temperature preprecipitation process could obviously improve the SCC resistance,ductility and could maintain high tensile strength for 7N01aluminum alloy in T4heat treatment state.

关 键 词：7N01铝合金 慢应变速率试验(SSRT) 热处理 应力腐蚀开裂(SCC) 

分 类 号：TG156.9[金属学及工艺—热处理]