铝熔体中热爆反应合成Al-10Ti中间合金  

Preparation Al-10Ti Master Alloys by Thermal Explosion Synthesis of Performs in Molten Aluminum

作　　者：侯运丰[1] 夏天东[2] 赵文军[2] 

机构地区：[1]兰州理工大学机电工程学院,兰州730050 [2]兰州理工大学甘肃省有色金属新材料省部共建善家重点实验室,兰州730050

出　　处：《有色金属》2008年第2期5-8,共4页Nonferrous Metals

基　　金：国家“863”计划项目(2003AA33X050);甘肃省自然科学基金资助项目(3ZS042-B25-011)

摘　　要：以Al和Ti粉末为原料,采用铝液中热爆反应技术制备Al-10Ti中间合金晶粒细化剂,通过X射线衍射(XRD)、扫描电镜(SEM)和差热分析仪(DSC)等手段研究铝液温度对反应过程和Al-10Ti中间合金组织形态的影响。结果表明,热爆反应合成的原始产物由Al和Al3Ti两相组成,铝液温度对中间合金中Al3Ti的尺寸、分布有重要影响,800℃铝液中合成的Al-10Ti中间合金具有良好的晶粒细化性能,通过控制铝液温度和原料Al/Ti比可有效控制Al3Ti的组织形态,对细化效果产生影响。The Al-10Ti master alloy as grain refiner is prepared by thermal explosion synthesis of performs in molten aluminum with Al, Ti and C as raw materials. The influences of molten aluminum temperature on synthesis parameters and the microstructures of Al-10Ti master alloy are investigated by using DTA, XRD, SEM. The results show that the synthesized Al-10Ti master alloy consists of Al and Al3Ti. The size and distribution of second phase particles in synthesized product are remarkably influenced by the temperature of molten aluminum. The Al-10Ti master alloys synthesized at 800℃ possesses excellent grain refining performance. The morphology of second phase particles Al3Ti in Al-10Ti master alloy can be controlled by adjusting molten aluminum temperature and Al/Ti ratio, so improves the grain refining performance of the refiner.

关 键 词：金属材料 晶粒细化剂 热爆反应 Al-Ti中间合金 

分 类 号：TG146.21[一般工业技术—材料科学与工程]