周正,冯毅

• 1:重庆大学材料科学与工程学院

摘要(Abstract)：

对亚共晶、共晶及过共晶Al-Si合金经熔体温度处理后的凝固组织进行了研究。研究表明,在共晶Al-12wt%Si及过共晶Al-20wt%Si合金的过热处理凝固组织中出现了晕圈,而在亚共晶Al-7wt%Si合金的凝固组织中却没有出现晕圈组织,表明晕圈的形成与合金成分有关。高于一定温度进行熔体温度处理时,共晶(Al-12wt%Si)合金的晕圈现象将消失。晕圈现象消失的原因是过热温度改变Al-Si合金的共晶共生区的结果。熔体的过热状态是晕圈组织形成的重要条件。

关键词(KeyWords)： 共晶;凝固;显微结构;铝合金;晕圈结构

Abstract:

Keywords:

基金项目(Foundation): 重庆市自然科学基金(CSTC,2006BB4239)

作者(Author): 周正,冯毅

参考文献(References)：

• [1]Nave M D,Dahle A K,Stjone D H.Halo formation in directional solidification[J].Acta Materialia,2002,50:2837-2849.
• [2]Gigliotti Jr mfx,Colligan Ga,Powell Glf.Halo formation in eutectic alloy systems[J].Met Trans,1970,1(4-7):891-897.
• [3]曹丽云,刘兴江,杨晓平,等.冷却速度对共晶铝硅合金凝固组织形态的影响[J].辽宁工学院学报,2001,21(4):40-42.CAO Li-yun,LIU Xing-jiang,YANG Xiao-ping,et al.Influences of cooling velocity on eutectic aluminum-silicon alloy solidification organization shape[J].Journal of Liaoning Institute of Technology on Social Science,2001,21(4):40-42.
• [4]何树先,孙宝德,王俊,等.熔体温度处理工艺对A319合金组织和性能的影响[J].中国有色金属学报,2001,11(5):834-839.HE Shu-xian,SUN Bao-de,WANG Jun,et al.Effect of melt temperature treatment on solidification structure of A319 alloy[J].The Chinese Journal ofNonferrous Metals,2001,11(5):834-839.
• [5]何树先,王俊,孙宝德,等.熔体温度处理对不同成分铝合金凝固组织和性能的影响[J].中国有色金属学报,2002,12(4):769-773.HE Shu-xian,WANG Jun,SUN Bao-de,et al.Effect of composition on A356 alloy processed by melt temperature treatment[J].The Chinese Journal ofNonferrous Metals,2002,12(4):769-773.
• [6]何树先,王俊,孙宝德,等.熔体温度处理细化亚共晶Al-Si合金组织[J].上海交通大学学报,2002,36(1):51-54.HE Shu-xian,WANG Jun,SUN Bao-de,et al.Refinement of hypoeutectic Al-Si alloy through melt temperature treatment[J].Journal of Shanghai Universityof Communication,2002,36(1):51-54.
• [7]陈忠伟,介万奇.熔体过热对Al-7%Si-0.50%Mg合金的显微组织和力学性能的影响[J].铸造,2001,50(12):724-727.CHEN Zhong-wei,JIE Wan-qi.Effect of melt superheating on microstructure and mechanical properties of Al-7%Si-0.50%Mg alloy[J].Foundry,2001,50(12):724-727.
• [8]常芳娥,坚增运,严文.熔体温度处理对Al-25%Si合金显微组织的影响[J].西安工业学院学报,2000,20(1):39-42.CHANG Fang-e,JIAN Zeng-yun,YAN Wen.The effect of melt temperature treatment on the microstructure of Al-25%Si alloy[J].Journal of Xian Instituteof Technology,2000,20(1):39-42.
• [9]WANG Jun,HE Shu-xian,SUN Bao-de,et al.Effects of melt thermal treatment on hypoeutectic Al-Si alloys[J].Material Science and Engineering A,2002,338(1-2):101-107.
• [10]李顺朴,陈熙琛.Al-Si合金的共晶共生区及组织形成规律[J].金属学报,1995,31(2):47-55.LI Shun-pu,CHEN Xi-chen.Growth rules of eutectic symbiotic region and microstructure of Al-Si[J].Acta Metallurgica Sinica,1995,31(2):47-55.
• [11]李双明,马伯乐,李晓历,等.定向凝固下共晶合金中相的竞争生长[J].中国科学(E辑),2005,35(5):479-489.LI Shuang-ming,MA Bo-le,LI Xiao-li.The competitive growth of phase in eutectic alloys under directional solidification condition[J].Science in China(E),2005,35(5):479-489.
• [12]李顺朴,陈熙琛.Al-Si合金凝固过程中的生核与分枝[J].物理学报,1995,44(2):233-237.LI Shun-pu,CHEN Xi-chen.Nucleation and branching of Al-Si alloy in the process of solidification[J].Acta Physica Sinica,1995,44(2):233-237.

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