热处理对AZ91D和AM50合金组织和腐蚀行为的影响  

Effects of Heat Treatment on Microstructure and Corrosion Behavior of AZ91D and AM50 alloys

作　　者：霍宏伟[1] 李瑛[1] 王福会[1] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室

出　　处：《材料热处理学报》2003年第4期8-11,共4页Transactions of Materials and Heat Treatment

基　　金：国家杰出青年基金 (5962 51 0 3) ;国家自然科学基金资助项目 (50 0 0 1 0 1 3)

摘　　要：研究了固溶处理 (T4 )和固溶 +人工时效处理 (T6 )对AZ91D和AM5 0合金组织结构、成分分布以及在 3 5wt%NaCl溶液中腐蚀行为的影响。结果表明热处理可以改变两种合金的组织结构和成分分布 ,进而对合金的自腐蚀电位和抗腐蚀性能产生影响 ,β相的体积分数和分布状态对合金的腐蚀行为具有重要的影响。Effects of solution treatment (T4) and solution plus artificial aging treatments(T6) on microstructures and corrosion behavior of AZ91D and AM50 alloys were investigated. The results showed that both heat treatments changed the microstructures and composition distribution, and further influenced the rest corrosion potential and corrosion resistance of the alloys. In the case of T4 condition, the corrosion resistance of the alloys decreased due to dissolution of β phase. Compared with as cast and T4 treated alloys, the alloys in T6-50h condition exhibited higher corrosion resistance due to the barrier effect of β phase.

关 键 词：热处理 镁合金 AZ91D AM50 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]