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Al-Ti-B-RE中間合金第二相的形態(tài)及分布對(duì)工業(yè)純鋁細(xì)化效果的影響
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江蘇省教育廳自然科學(xué)基金 (12KJD430002)；江蘇省高?！扒嗨{(lán)工程”優(yōu)秀青年骨干教師基金


Effect of the Morphology and Distribution of the Second Phases of Al-Ti-B-RE Master Alloys on Refining Commercially Pure Aluminum
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    摘要:

    為更好地優(yōu)化組織，提升細(xì)化性能，采用熔配—純金屬鈦法制備新型鋁晶粒細(xì)化劑—鋁鈦硼稀土Al-Ti-B-RE中間合金。試驗(yàn)結(jié)果表明：合成反應(yīng)溫度不同，所制備的Al-Ti-B-RE中間合金第二相所具有的形態(tài)分布及數(shù)量不同，低溫反應(yīng)合成中間合金第二相Al3Ti和Ti2A120RE稀土相為小塊狀，高溫度反應(yīng)合成則為長(zhǎng)片狀。借助X射線衍射（XRD）、掃描電鏡（SEM）、光學(xué)顯微鏡（OM）等技術(shù)對(duì)其第二相的微觀形貌分布、細(xì)化效果及形核能力等進(jìn)行表征分析。結(jié)果表明：第二相粒子形態(tài)分布及數(shù)量對(duì)細(xì)化效果有重要影響，第二相中的形核相與基底的錯(cuò)配度越小，越有利于非均質(zhì)形核，細(xì)化效果越好

    Abstract:

    To obtain better microstructures and improve refining performance, a new aluminum grain refiner Al-Ti-B-RE master alloy was prepared by a mix molten-pure titanium method. The results show that there are small blocks of Al3Ti and Ti2A120RE phases in the Al-Ti-B-RE master alloys prepared at optimal temperatures while there are large flakes at high temperature. The morphology, distribution and quantity of second phases of Al-Ti-B-RE master alloys and refining effects and nucleating potentials were studied by XRD, SEM and OM. It is indicated that the morphology, distribution and quantity of second phase particles of Al-Ti-B-RE master alloys have an important influence on the refining effects. A better refining effect could be obtained with the smaller disregistry between nucleation and the substrate in favor of promoting nucleation

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王正軍,司乃潮. Al-Ti-B-RE中間合金第二相的形態(tài)及分布對(duì)工業(yè)純鋁細(xì)化效果的影響[J].稀有金屬材料與工程,2015,44(6):1494~1498.[Wang Zhengjun, Si Naichao. Effect of the Morphology and Distribution of the Second Phases of Al-Ti-B-RE Master Alloys on Refining Commercially Pure Aluminum[J]. Rare Metal Materials and Engineering,2015,44(6):1494~1498.]
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  • 收稿日期:2014-06-14
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  • 在線發(fā)布日期: 2016-01-04
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