(1. 燕山大学 国家冷轧板带装备及工艺工程技术研究中心，秦皇岛 066004；
2. 包头铝业有限公司，包头 014046；
3. 中国科学院 金属研究所，沈阳 110016)
摘 要: 对具有不同硼化物分布情况的AlB2型铝硼中间合金熔体(AlB2型中间合金熔体)进行高温处理制备AlB12型铝硼中间合金(AlB12型中间合金)。结果表明：对于硼化物团聚严重，含有大量尺寸较大硼化物团聚的AlB2型中间合金熔体，当在高温处理过程中搅拌强度较低时，所形成的AlB12型中间合金中AlB12团聚严重；高温处理过程中，分布于熔体内的硼化物团聚中接触较紧密的AlB2颗粒在转变时会发生凝固，并形成尺寸较大的AlB12颗粒；在高温处理过程中，快速搅拌可有效阻止AlB12团聚的形成，还可对硼化物团聚中AlB2颗粒的凝固起到一定的破坏作用，从而有效减小所得AlB12型中间合金中的AlB12颗粒尺寸及尺寸分布范围。
关键字: 铝硼中间合金；高温处理；AlB12型；显微组织
（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
