淬火速率和锆含量对7055型铝合金晶间腐蚀的影响  

Influence of quench rate and zirconium content on intergranular corrosion of 7055 type aluminum alloy

作　　者：张新明[1] 刘胜胆[1] 刘瑛[1] 张小艳[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2007年第2期181-185,共5页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金重点资助项目(50230310);国家教育部博士点基金资助项目(2004053304)

摘　　要：研究淬火速率和锆含量对7055型铝合金晶间腐蚀的影响,并结合金相显微镜和透射电镜对其机理进行分析和讨论。结果表明:淬火速率和锆含量的增加都可提高合金的抗晶间腐蚀能力,当锆含量大于0.1%时,合金晶间腐蚀的淬火敏感性明显减小;微量锆的添加阻碍了再结晶,细化了晶粒;淬火速率的提高减小了晶界无沉淀析出带的宽度,因而提高了合金抗晶间腐蚀能力。The influence of quench rate and zirconium content on the intergranular corrosion of 7055 type aluminum alloy was investigated by optical microscopy （OM） and transmission electron microscopy （TEM）. The results show that the increase of zirconium content and quench rate can improve the resistance to intergranualr corrosion. The zirconium content more than 0.1% results in the significant decrease of quench sensitivity relative to intergranular corrosion. The addition of zirconium inhibits recrystallization and refines grains, and the increase of quench rate decreases grain boundary precipitate free zone, which improves intergranular corrosion resistance.

关 键 词：7055型铝合金 淬火速率 锆 晶间腐蚀 

分 类 号：TG142.71[一般工业技术—材料科学与工程]