(1. 燕山大學(xué) 國家冷軋板帶裝備及工藝工程技術(shù)研究中心，秦皇島 066004；
2. 包頭鋁業(yè)有限公司，包頭 014046；
3. 中國科學(xué)院 金屬研究所，沈陽 110016)
摘 要: 對(duì)具有不同硼化物分布情況的AlB2型鋁硼中間合金熔體(AlB2型中間合金熔體)進(jìn)行高溫處理制備AlB12型鋁硼中間合金(AlB12型中間合金)。結(jié)果表明：對(duì)于硼化物團(tuán)聚嚴(yán)重，含有大量尺寸較大硼化物團(tuán)聚的AlB2型中間合金熔體，當(dāng)在高溫處理過程中攪拌強(qiáng)度較低時(shí)，所形成的AlB12型中間合金中AlB12團(tuán)聚嚴(yán)重；高溫處理過程中，分布于熔體內(nèi)的硼化物團(tuán)聚中接觸較緊密的AlB2顆粒在轉(zhuǎn)變時(shí)會(huì)發(fā)生凝固，并形成尺寸較大的AlB12顆粒；在高溫處理過程中，快速攪拌可有效阻止AlB12團(tuán)聚的形成，還可對(duì)硼化物團(tuán)聚中AlB2顆粒的凝固起到一定的破壞作用，從而有效減小所得AlB12型中間合金中的AlB12顆粒尺寸及尺寸分布范圍。
關(guān)鍵字: 鋁硼中間合金；高溫處理；AlB12型；顯微組織
（1. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, China;
2. Baotou Aluminum Co., Ltd., Baotou 014046, China;
3. Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China）
Abstract:AlB12-type Al-B master alloys (AlB12-type master alloys) were prepared by high temperature treatment of AlB2-type Al-B master alloy melts (AlB2-type master alloy melts) with different boride distributions. The results show that, when the AlB2-type master alloy melt, in which the boride particles are severely segregated and some sizable boride agglomerations exist, is slowly agitated during the high temperature treatment. AlB12 particles are severely segregated in the produced AlB12-type master alloy. During the high temperature treatment, the coalescence phenomenon happens for the AlB2 particles in close contact with each other in boride agglomerations, resulting in the formation of large AlB12 particles. The high-speed stirring adopted during the high temperature treatment can effectively prohibit the formation of AlB12 agglomerations, and also has an effect of preventing the coalescence of AlB2 particles in boride agglomerations, thereby effectively reduce the size and size distribution range of AlB12 particles in the produced AlB12-type master alloys.
Key words: Al-B master alloy; high temperature treatment; AlB12-type; microstructure
