Er对AlSi10Mg合金组织及性能的影响  

Effects of Rare Earth Er on Microstructure and Properties of AlSi10Mg Alloy

作　　者：单世杰 赵浩宇 王博 孙影 江鸿翔[2] 何杰[2] 张丽丽[2] 赵九洲[2] 陈慧琴[1] SHAN Shijie;ZHAO Haoyu;WANG Bo;SUN Ying;JIANG Hongxiang;HE Jie;ZHANG Lili;ZHAO Jiuzhou;CHEN Huiqin(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024;Shichangxu Advanced Materials Innovation Center,Institute of Metals Research,Chinese Academy of Sciences,Shenyang 110016;School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110027)

机构地区：[1]太原科技大学材料科学与工程学院,太原030024 [2]中国科学院金属研究所,师昌绪先进材料创新中心,沈阳110016 [3]沈阳工业大学材料科学与工程学院,沈阳110027

出　　处：《特种铸造及有色合金》2024年第9期1170-1175,共6页Special Casting & Nonferrous Alloys

基　　金：中国科学院国际合作局对外合作重点资助项目(172GJHZ2022038MI);国家自然科学基金资助项目(U21A2043,52174380);广西科技重大专项资助项目(AA23023032)。

摘　　要：利用金相显微镜、扫描电镜、电子探针以及硬度测试和电导率测试等手段,研究了Er对AlSi10Mg合金组织及性能的影响,分析了Er的影响规律及其作用机理。结果表明,Er的添加促使合金中α-Al晶粒的细化和共晶Si的变质。随着Er含量增加,合金显微硬度略微提升。当Er添加量小于0.6%(质量分数,下同)时,合金的热导率随Er添加量的增加而提高;当添加0.6%的Er时,合金的热导率达到峰值,为151.89 W/(m·K);进一步增加Er的含量,合金的热导率略微降低。分析认为,添加Er主要通过降低溶质元素在基体中的固溶度以及变质共晶Si来提高合金的热导率。The influence of rare earth Er on microstructure and properties of AlSi10Mg alloy was investigated using metallographic microscopy,scanning electron microscopy,electron probe,hardness testing,and conductivity testing,and the influence law and mechanism were analyzed.The results indicate that the addition of rare earth Er can promote the refinement ofα-Al grain and modification of eutectic Si in the alloy.With the increase of Er content,the microhardness is slightly improved.When Er content is less than 0.6%,the thermal conductivity is increased with the Er content.With 0.6%Er addition,the thermal conductivity reaches the peak value of 151.89 W/(m·K).With the further increase of Er,the thermal conductivity is decreased slightly.The addition of rare earth Er can improve the thermal conductivity of alloy by reducing solid solubility of solute elements in the matrix and modifying eutectic Si.

关 键 词：AlSi10Mg合金 ER 热导率 

分 类 号：TG146.21[一般工业技术—材料科学与工程]