富铈稀土在5182铝合金中的变质机制研究  

Research of metamorphism of Ce-rich in 5182 aluminum alloy

作　　者：巩天浩[1] 董俊慧[1] 袁洪伟[2] GONG Tian-hao;DONG Jun-hui;YUAN Hong-wei(Inner Mongolia University of Technology,Hohhot 010051,China;Northeast Light Alloy Co.,Ltd.,Harbin 150060,China)

机构地区：[1]内蒙古工业大学,内蒙古呼和浩特010051 [2]东北轻合金有限责任公司,黑龙江哈尔滨150060

出　　处：《轻合金加工技术》2020年第3期12-16,共5页Light Alloy Fabrication Technology

基　　金：内蒙古自治区高等学校科学研究项目(NJZY18096)。

摘　　要：采用偏光显微镜、场发射扫描电镜对富铈稀土变质的5182铝合金组织进行试验研究。研究结果表明:富铈稀土的变质作用在冷却速度较慢的空冷条件下较为明显,而在冷速较快的水冷、油冷条件下没有效果。空冷条件下,当添加w(Ce)=0.16%时,5182铝合金晶粒尺寸由变质前的90.96μm减小到43.95μm;但当w(Ce)增加到0.38%时,其变质效果大大减弱。The microstructure of 5182 aluminum alloy modified by Ce-rich mischmetal was analyzed by polarized light microscope and field emission scanning electron microscopy.The experimental results show that the metamorphism of rare earth is more obvious under the air cooling condition with slower cooling rate,but it has no effect under the condition of water cooling and oil cooling with faster cooling rate.Under air-cooling conditions,the addition of 0.16%Ce-rich rare earth can reduce the grain size of 5182 aluminum alloy from 90.96μm to 43.95μm.With the addition of rare earth increased to 0.38%,the metamorphism of rare earth is greatly reduced.

关 键 词：5182铝合金 富铈稀土 变质机制 晶粒尺寸 

分 类 号：TG292[金属学及工艺—铸造]