固溶温度对Mg-3Zn-1Mn-1Y合金组织和腐蚀性能的影响  

Effects of Solution Temperature on Microstructure and Corrosion Properties of Mg-3Zn-1Mn-1Y Alloy

作　　者：武晋翔 张正卫 许春香[1] 张金山[1] WU Jinxiang;ZHANG Zhengwei;XU Chunxiang;ZHANG Jinshan(School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《热加工工艺》2025年第2期68-71,75,共5页Hot Working Technology

基　　金：国家自然科学基金资助项目(51574175,51474153)。

摘　　要：采用OM、XRD、浸泡法和电化学工作站研究了固溶温度对Mg-3Zn-1Mn-1Y合金微观组织和腐蚀性能的影响。结果表明,经固溶处理之后,合金中第二相逐渐溶入到基体中且伴随晶粒的长大。随着固溶温度(390、420、450、480℃)的升高,合金耐腐蚀性能先增加后降低,在450℃×24 h固溶下,合金表现出最佳耐腐蚀性能,其腐蚀速率为(0.4127±0.024)mm/y。合金耐腐蚀性能提高的原因归因于固溶之后组织均匀和第二相的溶入导致微电偶腐蚀减弱。The effects of solution temperature on the microstructure and corrosion properties of Mg-3Zn-1Mn-1Y alloy were studied by OM,XRD,immersion method and electrochemical workstation.The results show that after solution treatment,the second phase in the alloy gradually dissolves into the matrix and grows with the grouth of the grain growth.With the increase of solution temperature(390℃,420℃,450℃,480℃),the corrosion resistance of the alloy first increases and then decreases.At 450℃×24 h,the alloy shows the best corrosion resistance,and its corrosion rate is(0.4127±0.024)mm/y.The reason for improving the corrosion resistance of the alloy is that the microstructure is uniform after solid solution and the dissolution of the second phase leads to the weakening of micro galvanic corrosion.

关 键 词：Mg-3Zn-1Mn-1Y合金 固溶温度 显微组织 耐腐蚀性能 

分 类 号：TG166.4[金属学及工艺—热处理] TG174.3[金属学及工艺—金属学]