原位反应法制备Al-Ti-B-RE晶粒细化剂及其细化效果  

Preparation of Al-Ti-B-RE Grain Refiner by In-Situ Reaction Method and Its Refining Effect

作　　者：陈永禄[1] 傅高升[2] 陈文哲[1] 

机构地区：[1]福建工程学院材料科学与工程系,福建福州350014 [2]福建交通职业技术学院,福建福州350007

出　　处：《铸造》2007年第12期1324-1327,共4页Foundry

基　　金：福建省教育厅重点资助项目(JA04251);福建省科技厅青年人才项目(2006F3006);福建省科技厅重大专项(2006HZ0002-1)。

摘　　要：以K2TiF6、KBF4、Al-10RE为添加物,采用原位反应法制备了Al-Ti-B-RE中间合金,通过正交法优化出各合金元素的合理配比,即5%Ti、1%B、0.5%RE,Ti元素的吸收率达92.4%。RE元素进入TiAl3相,阻碍其生长,TiAl3相以小块状为主,分布较均匀,增强细化效果。利用该细化剂对A356铝合金进行细化处理,其晶粒尺寸仅为经Al-5Ti-B处理过的晶粒的42.2%,枝晶间距明显缩小。Take K2TiF6, KBF4, Al-10RE alloy as supplements, the AI-Ti-B-RE intermediate alloy has been prepared by adopting in-situ reaction. The blending ratio of alloying elements is optimized by means of orthogonal experiment, that is 5%Ti, 1%B, 0.5%RE, and the absorptivity of Ti can reach 92,4%. The RE elements enter the TiAI3 phase and hinder its growth. The TiAl3 phases in the：alloy are mainly small bulk and distributed evenly, so the refining effect is enhanced. The grain size of A356 aluminum alloy refined by adding the AI-5Ti-B-0.5RE refiner is reduced to 42.2% of the grain refined by adding the Al-5Ti-B refiner, and the dendrite spacing is also reduced obviously.

关 键 词：Al-Ti-B-RE合金 细化剂 晶粒细化 原位反应 

分 类 号：TG146.21[一般工业技术—材料科学与工程]