氟盐法制备Al-Ti-B中间合金的研究  

Research on Manufacture Process of Al-Ti-B Master Alloy by the Reaction of Complex Halide Salts with Molten Aluminum

作　　者：陈亚军[1] 许庆彦[1] 黄天佑[1] 冀树军[2] 梁再枝 

机构地区：[1]清华大学机械工程系先进材料成形制造重点实验室,北京100084 [2]包头铝业集团有限公司,内蒙古包头014010

出　　处：《铸造技术》2006年第6期601-604,共4页Foundry Technology

基　　金：国家重点基础研究发展规划(973)项目(2005CB724105)

摘　　要：介绍了一种采用氟盐与铝液在高温下反应,制取Al5Ti1B中间合金细化剂的方法.从Ti、B的回收率、反应生成物以及微观组织的角度,对加料工艺、作用时间、搅拌强度等工艺因素做了分析.另外,对制取产品的细化效果进行研究.结果表明,在Ti加入量为0.05%～0.10%之间细化效果最好,该合金细化有效时间约为6 h.还在Al-Ti-B基础上引入稀土元素制取Al-Ti-B-RE中间合金细化剂,可进一步提高细化效果和长效性.Al-Ti-B master alloy was prepared by the reaction of complex halide salts with molten aluminum at high temperature. Qualitative study was carried out to investigate the effects of addition process, interaction time and stirring intensity on the recovery of Ti and B, reaction products and microstructure. The refining experimental results showed that the optimum addition of Ti is 0.05 %-0.10% and effective refining time of the alloy is about 6 hours. With futher addition of of rare earth in Al-Ti-B, the Al-Ti-B-RE grain refiner was produced. This alloy shows futher improved refining effect and long refining time.

关 键 词：中间合金 晶粒细化剂 异质晶核 细化效果 

分 类 号：TG27[金属学及工艺—铸造]