再结晶组织对7N01铝合金型材应力腐蚀敏感性的影响  

Effect of Recrystallization Structure on Stress Corrosion Cracking Sensitivity of 7N01 Aluminum Alloy

作　　者：周文标 谢尚昇[2] 覃珊[2] 江鸿杰[2] 

机构地区：[1]北京工业大学,北京100022 [2]广西南南铝加工有限公司,广西南宁530031

出　　处：《热加工工艺》2015年第4期223-225,229,共4页Hot Working Technology

基　　金：南宁市科技计划经费支持项目(20121002)

摘　　要：采用不同温度对7N01铝合金型材进行固溶处理,通过光学显微镜和SEM分析型材的再结晶组织特征,结合室温拉伸、电导率测试、慢应变速率应力腐蚀试验,研究不同再结晶组织对合金应力腐蚀敏感性的影响。结果表明:固溶热处理使得再结晶体积分数增加,合金的力学性能降低,应力腐蚀呈晶间腐蚀特征,应力腐蚀敏感性随固溶温度的升高先减小后增大。Solution treatment at different temperature of 7N01 aluminum alloy was carried out. Recrystallization structure was investigated by OM and SEM. The effects of recrystallization on stress corrosion cracking were investigated by combination of mechanical test, electrical conductivity and slow stain rate test（SSRT）. The results show that the volume fraction of recrystallization increases with the increase of solution temperature. The mechanical properties decrease, and the stress corrosion cracking sensitivity decreases and then increases, the most significant effect is intergranular corrosion.

关 键 词：7N01铝合金 固溶热处理 再结晶 应力腐蚀开裂 

分 类 号：TG156.9[金属学及工艺—热处理]