稀土Ce对改善含Fe的A356合金组织作用机理  

Effect of Ce Addition on Microstructure of Low-Fe A356 Aluminium Alloys

作　　者：周丽 李雯 罗亚君 徐胤翱 赵昱磊 黄宇 缪丝羽 邓晓翔 王灿 ZHOU Li;LI Wen;LUO Yajun;XU Yinao;ZHAO Yulei;HUANG Yu;MIU Siyu;DENG Xiaoxiang;WANG Can(College of Mechanical Engineering,Hunan Institute of Engineering,Xiangtan 411104,China)

机构地区：[1]湖南工程学院机械工程学院,湘潭411104

出　　处：《湖南工程学院学报（自然科学版）》2022年第3期32-35,共4页Journal of Hunan Institute of Engineering(Natural Science Edition)

基　　金：湖南省自然科学基金资助项目(2022JJ50123).

摘　　要：采用光学显微镜、ZEISS MA10扫描电镜及Oxford能谱仪研究了Ce对不同铁含量A356合金组织的影响.结果表明:在不同铁含量的A356铝合金中,未加入稀土Ce时,其共晶Si呈现为粗大的板条状;在添加0.2%Ce后,合金中的共晶体中的Si得到了明显细化,呈网状分布,Fe相由粗大针状转变为短棒状,其组织形貌得到改善.Optical microscope,ZEISS MA10 scanning electron microscope and Oxford EDS are used to study the effect of Ce on the microstructure of A356 alloy with different iron content.The results show that the eutectic Si is coarse and lath-shaped when the Ce is not added.As 0.2wt%Ce is added,the eutectic Si in the A356 alloy is greatly refined and distributed in a network shape.The Fe phase has changed from a thick needle shape to a short rod shape,and the microstructure of A356 alloy is improved.

关 键 词：A356合金 Fe相 稀土Ce 共晶Si 

分 类 号：TG146.2[一般工业技术—材料科学与工程]