自蔓延燃烧合成Al-Ti-C晶粒细化剂的稀释及其效果  

Dilution and Refining Results of Al-Ti-C Grain Refiner Prepared by SHS

作　　者：赵文军[1] 郑丽[2] 夏天东[1] 刘天佐[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室 [2]天水师范学院工学院,甘肃天水741000

出　　处：《有色金属》2006年第2期18-21,共4页Nonferrous Metals

基　　金：国家"863"计划资助项目(2003AA33X050)

摘　　要：研究自蔓延燃烧合成(SHS)法制备的Al-Ti-C铝合金晶粒细化剂的稀释过程以及晶粒细化效果。结果表明,用自蔓延燃烧合成(SHS)技术制备出的Al-Ti-C合金中含有大量可以作为细化相的Al3Ti和TiC颗粒,可以作为铝及铝合金的新型晶粒细化剂。SHS直接合成Al-Ti-C中大量的Al3Ti和TiC颗粒会发生团聚现象,为获得分散且细小的粒子使其细化性能优异,必须对其进行稀释处理。考虑粒子存在的形态以及工业生产的影响,稀释的温度选择在1073K左右,保温时间为15min为宜。稀释后的Al-Ti-C晶粒细化剂具有良好的细化性能。The dilution process of Al-Ti-C alloy as Al-alloy grain refiner and its refining effects are investigated. The results show that there are the Al3Ti and TiC particles as grain refining phrases in Al-Ti-C alloy synthesized by SHS, so the Al＋Ti-C alloy can be used as the grain refiner for Al and N-alloy. However, the serious agglomeration of the Al3Ti and TiC particles occurs in the Synthesized alloy, it must be diluted in order to disperse the fine particles for the excellent refining performance. With the consideration of the particles status and commercial production conditions, the operation temperature is about 1073K and the retention time is 15min for the dilution treatment process. The good grain refinement can be achieved with the diluted Al-Ti-C grain refiner.

关 键 词：金属材料 AL-TI-C晶粒细化剂 自蔓延燃烧合成 稀释处理 晶粒细化 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG113.12[金属学及工艺—金属材料]