La对AZ81镁合金_相组织及腐蚀性能的影响.pdf

Vol.32 No. 5 May 2011 FO NDRY TECHNOLOGY 673 La AZ81 1 1 2 3 王瑞权 , 陈云祥 , 贺 睿 , 武慧慧 ( 1., 310053; 2.,450001; 3. , 730050) : 利用金相显微镜和电化学工作站等方法,研究了不同La 添加量的 AZ81+ xLa(x= 0, 0. 1%,0. 3%, 0. 5%, 1.0%, 质量 分数) 镁合金的 态显微组织和腐蚀性能结果表明, AZ81 合金加入 La 后, 不但形成了条状的 Al La 强化相, 而且形成了 11 3 具有类网状结构的细化相,这类网状结构的相能有效地抑制腐蚀过程的进行, 从而提高了镁合金的耐蚀性 : AZ81镁合金;显微组织; La; 腐蚀性能 + :TG146. 2 2 : A 2011) Effect of La on Phase and Corrosion Resistance of AZ81 Magnesium Alloy 1 1 2 3 WANG Rui uan , CHEN Yunxiang , HE Rui , WU Huihui (1. Zhejiang Institute of Mechanical and Electrical Engineering, Hangzhou 310053, China; 2. Zhengzhou Siwei Mechanical Electrical E uipment Manufacturing Co. , Ltd. , Zhengzhou 450001, China; 3. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China) Abstract : The microst ruct ures and corrosion behavior of ascast AZ81+ xLa alloys( x= 0% , 0 1% , 0 3% , 0 5% , 1 0% , mass fraction) were investigated by OM and Electrochemical workstation With the addit ion of La in AZ8 1 alloys, not only rodlike Al11La3 Strengthening phase, but also small phase similar to netlike structure which could restrain t he corrosion at some extent were formed Key words: AZ81 magnesium alloy; Microst ruct ure; La; Corrosion resistance , [2] [3,4] , La , , ,