FACTORS AFFECTING GRAIN REFINEMENT OF ALUMINUM USING TITANIUM AND BORON ADDITIVES
FACTORS AFFECTING GRAIN REFINEMENT OF ALUMINUM USING TITANIUM AND BORON ADDITIVES
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DOI：
10.1007/bf02654921
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发表时间：
1976-01-01
期刊：
影响因子：
--
通讯作者：
PEARSON, J
中科院分区：
文献类型：
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作者：
JONES, GP;PEARSON, J
本文简要介绍了铝合金铸造晶粒细化技术的发展及添加三元Al-Ti-B中间合金所取得的效果。给出了一个测试程序，用于评估这些母合金的相对有效性，结果与各种合金处理，包括那些成分“中毒”的晶粒细化剂。从热力学角度定量地研究了影响晶粒细化合金各组分行为的平衡条件。对铝在二硼化钛上形核机理的一种理论进行了检验，发现它不适用。本文用图解法给出了TiB_2、ZrB_2、TiC、ZrC、Cr_3C_2、CrB_2在铝液中溶解度的新数据。在定量数据的基础上，对晶粒细化实践中合金行为的实际方面进行了分析和讨论。
The development of grain-refining techniques for the casting of aluminum, and the results achieved using additions of ternary Al-Ti-B master-alloys, are briefly described. A test procedure is given for assessing the relative effectiveness of these master-alloys, and the results are related to the various kinds of alloy treated, including those with constituents which “poison” the grain-refining agent. The equilibrium conditions which affect the behavior of the constituents of the grain-refined alloys are examined quantitatively from a thermodynamic viewpoint. One theory about the mechanism of nucleation of aluminum on titanium diboride is examined and found inapplicable. New data on the solubility of TiB2, ZrB2, TiC, ZrC, Cr3C2, CrB2in liquid aluminum are presented graphically. Practical aspects of alloy behavior in grain-refining practice are analyzed and discussed on the basis of the quantitative data.