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首页> 外文会议>Annual Casting Congress >Preparation and Characterization of Al-B and B-Rich Al-Ti-B Master Alloys for the Grain Refinement of Al-7Si Alloy
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Preparation and Characterization of Al-B and B-Rich Al-Ti-B Master Alloys for the Grain Refinement of Al-7Si Alloy

机译：Al-B和B富含Al-B-富含Al-Ti-B主合金的制备与表征Al-7Si合金晶粒细化

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The present paper reports on the preparation and characterization of Al-B and B-rich Al-Ti-B master alloys and their performance in the grain refinement of Al-7Si alloy. The grain refining efficiency of Al-7Si alloy has been studied in detail with these indigenously prepared binary (Al-Ti, Al-B) and ternary (Al-Ti-B) master alloys with conventional as well as higher addition levels. Binary Al-3B and ternary Al-1Ti-3B master alloys have been made by the reaction of halide salts (K_2TiF_6 and KBF_4) with molten Al. a number of master alloys have been prepared by varying the process parameters such as reaction temperature and reaction time. After optimizing the reaction temperature and time various binary Al-3Ti, Al-3, 5, 7B and ternary Al-3Ti-1B, Al-1Ti-3B, Al-3Ti-3B, Al-5Ti-1B and Al-1Ti-5B master alloys have been prepared and characterized by chemical analysis, particle size analysis, XRD and SEM/EDX microanalysis. The present results suggest that, a minimum of reaction time of 60min was found to be essential in order to reach the completion of the reaction within the experimental conditions studied in the present investigation. Similarly, the optimum reaction temperature was found to be 800 deg C. Results also suggest that, the reaction between molten Al and K_2TiF_6 is quite intense and as a result high Ti recovery with large Al_3Ti particles within the reaction time studied at a reaction temperature of 800 deg C. Under similar conditions the reaction of molten Al and KBF_4 is rather sluggish and is more so in presence of K_2TiF_6 and results in low B recovery and formation of comparatively small AlB_2/AlB_(12) particles. In addition, the present results suggest that, high B containing (Al-3B and Al-1Ti-3B) master alloys are more efficient grain refiners for Al-7Si alloy, both at short and long holding times, when compared to conventional grain refiners (Al-5Ti-1B) and high Ti containing (Al-3Ti and Al-3Ti-1B) master alloys.
机译：对Al-B的制备和表征和富B的Al-Ti-B母合金和它们的以Al-7SI合金的晶粒细化的性能本文件报告。的Al-7SI合金的晶粒细化的效率已被详细研究与这些本国准备二进制（的Al-Ti，AL-B）和三元（的Al-Ti-B）母合金与常规的以及更高的添加水平。二元Al-3B和三元的Al-TI-3B中间合金已通过卤化物盐（K_2TiF_6和KBF_4）与熔融Al的反应制备。许多母合金的已制备通过改变工艺参数如反应温度和反应时间。优化反应温度和时间的各种二元Al-3Ti，AL-3，图5，图7B和三元的Al-3Ti-1B，铝 - TI-3B，铝 - 3Ti-3B，铝 - 5TI-1B和Al-1Ti-后图5B母合​​金已被制备和表征通过化学分析，粒度分析，X射线衍射和SEM / EDX微量分析。目前的结果表明，至少60分钟的反应时间被认为是为了达到在本次调查研究的实验条件，在反应的完成至关重要。类似地，适宜的反应温度被认为是800℃。结果还表明，熔融Al和K_2TiF_6之间的反应是相当激烈，结果与高曾在的反应温度下的反应时间内大Al_3Ti颗粒的Ti回收800℃。在类似条件下的熔融Al和KBF_4的反应是相当缓慢的，更所以在低硼的回收和形成相对较小的AlB_2 / AlB_（12）颗粒K_2TiF_6和结果的存在。此外，本发明的结果表明含（铝-3B和Al-TI-3B）的是，高乙相对于传统的晶粒细化剂时的母合金是铝7SI合金，无论是在短期和长期的保持时间，更有效的晶粒细化（铝5TI-1B）和高含Ti（铝3Ti和Al-3Ti-1B）的母合金。

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