| Formation of （Ca n-x, Na x）Pm Compounds in Eutectic Al--Si Piston Alloys and Invalidation of Phosphorus Modification Effect |
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| 引用本文： | 刘相法,乔进国,张希华,刘相俊,边秀房.Formation of （Ca n-x, Na x）Pm Compounds in Eutectic Al--Si Piston Alloys and Invalidation of Phosphorus Modification Effect[J].金属学报,2004,40(3):245-250. |
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| 作者姓名： | 刘相法 乔进国 张希华 刘相俊 边秀房 |
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| 作者单位： | 山东大学材料液态结构及其遗传性教育部重点实验室,济南,250061 |
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| 基金项目： | 国家自然科学基金项目50171037和教育部科学技术研究重点项目01105资助 |
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| 摘 要： | 利用金相和电子探针微量分析仪(EPMA)等手段研究了共晶型Al-Si(ZL109)合金熔体中Ca或(和)Na对Al-P中间合金变质效果的影响，含磷化合物的组成与磷变质的关系．结果表明，合金中Ca或(和)Na能使磷变质失效，甚至出现反常的Na变质效果；Ca或(和)Na促使AlP分解，并与磷形成比AlP更稳定的(Can-x，Nax)Pm化合物，从而抑制了磷变质作用的发挥；C2C16精炼可使(Can-x，Nax)Pm化合物的组成和结构发生转化，形成了能作为初晶Si结晶核心的(Al5，Mg0．85，Ca0．15)P3．4化合物，从而使磷变质效果得以恢复．
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| 关 键 词： | 共晶Al-Si合金 磷变质处理 Ca和Na的影响 |
| 文章编号： | 0412-1961(2004)03-0245-06 |
| 收稿时间： | 2003-02-26 |
| 修稿时间： | 2003-06-02 |
FORMATION OF (Can-x,Nax)Pm COMPOUNDS IN EUTECTIC Al-Si PISTON ALLOYS AND INVALIDATION OF PHOSPHORUS MODIFICATION EFFECT |
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| LIU Xiangfa,QIAO Jinguo,ZHANG Xihua,LIU Xiangjun,BIAN Xiufang.FORMATION OF (Can-x,Nax)Pm COMPOUNDS IN EUTECTIC Al-Si PISTON ALLOYS AND INVALIDATION OF PHOSPHORUS MODIFICATION EFFECT[J].Acta Metallurgica Sinica,2004,40(3):245-250. |
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| Authors: | LIU Xiangfa QIAO Jinguo ZHANG Xihua LIU Xiangjun BIAN Xiufang |
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| Affiliation: | Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education |
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| Abstract: | The influence of Ca and Na on phosphorus modification performance, the relation between constitution of compounds containing-phosphorus and modification performance in eutectic Al-Si piston alloys were investigated by optical microscopy and electron probe microanalyzers (EPMA). It has been shown that Ca or (and) Na can make phosphorus modification inefficiency and even Na modification efficiency appears, the abnormal phenomena is due to the formation of (Can-x, Nax)Pm compounds which is more stable than A1P phases in the melt. However, the phosphorus modification efficiency can recover after refining treatment by C2Cl6, because of (Can-x, Nax)Pm changing to (Al5, Mg0.85, Ca0.15) P3.4 which can serve as the nuclei of primary Si phases. |
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| Keywords: | eutectic Al-Si alloy phosphorus modification treatment effect of Ca and Na |
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