稳定化退火对5E61铝合金腐蚀性能的影响  

Effect of Stabilizing Annealing on Corrosion Properties of 5E61 Al Alloy

作　　者：苏美华 文胜平[1] 刘勇[1] 王为[1] 黄晖[1] 聂祚仁[1] SU Meihua;WEN Shengping;LIU Yong;WANG Wei;HUANG Hui;NIE Zuoren(School of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学材料科学与工程学院

出　　处：《热加工工艺》2019年第20期130-134,137,共6页Hot Working Technology

基　　金：北京市科技计划项目(Z161100002116004)

摘　　要：经冷作硬化的中高Al-Mg合金,由于Mg元素过饱和度较高,室温下长期放置会在晶界处析出连续分布的网状β相,严重影响合金的抗腐蚀性能。因此,需对中高镁Al-Mg合金进行稳定化退火处理,使β相在合金晶内和晶界处弥散析出,提高合金的腐蚀性能。通过对5E61铝合金进行不同温度和时间的稳定化退火处理,确定合金稳定化退火区间,并对稳定化退火后的5E61铝合金进行100℃/168 h的敏化处理,测试合金敏化处理后的腐蚀性能,分析合金中β相在敏化处理后的析出情况,确定合金最佳稳定化退火工艺。For the cold work hardening medium and high Al-Mg alloy, due to a high degree of supersaturation of Mg element, the mesh β phase is continuously distributed at grain boundary after a long time placement at room temperature,which seriously influence the corrosion resistance of the alloy. Therefore, it is necessary to stabilize and anneal the medium and high magnesium Al-Mg alloy, so that the β phase can be dispersively precipitated in the crystal and grain boundary of the alloy, and the corrosion resistance of the alloy cna be improved. The stabilizing annealing interval of 5 E61 alloy was determined by stabilizing annealing at different temperatures and time. The 5 E61 alloy after stabilizing annealing was sensitized at 100 ℃/168 h, and the corrosion resistance of the alloy was tested. The precipitation of β phase in the alloy after sensitization was analyzed, and the optimum stabilizing annealing process was determined.

关 键 词：5E61合金 微合金化 稳定化 

分 类 号：TG166.3[金属学及工艺—热处理] TG174.33[金属学及工艺—金属学]