杨承志,龙思远,王朋,杨怀德,黄彦彦

• 1:重庆大学材料科学与工程学院
• 2:重庆大学国家镁合金材料工程技术研究中心
• 3:株洲南车奇宏散热技术有限公司

摘要(Abstract)：

为了研究硼化物(KBF4)和锶(Sr)对再生Al-Si合金中富铁相的影响,分别采用X射线荧光光谱分析仪(XRF)对试样进行成分分析,应用光学显微镜(OM)、扫描电镜(SEM)和能谱仪(EDS)对试样显微组织进行形貌观察和相成分分析。结果表明,KBF4不能起到降铁作用,但促使β-Fe相向初生α-Fe相转变,当B加入量达到0.75%时,初生α-Fe相周围出现了汉字状α-Fe相;Sr会促使β-Fe相向汉字状α-Fe相转变,当Sr加入量为0.3%时,β-Fe相几乎消失,同时,Sr对针状β-Fe相有溶解碎裂作用。

关键词(KeyWords)： 再生Al-Si合金;富铁相;硼化物;Sr

Abstract:

Keywords:

基金项目(Foundation): 汽车轻量化构件精确铸造关键技术及产业化集群示范(1020808720130103);; 大型仪器设备开放基金(201412150094)

作者(Author): 杨承志,龙思远,王朋,杨怀德,黄彦彦

DOI: 10.13289/j.issn.1009-6264.2016.01.007

参考文献(References)：

• [1]De Moraes H L,Oliveira J R,Espinosa D C R.Removal of iron from molten recycled aluminum through intermediate phase filtration[J].Materials Transactions,2006,47(7):1731-1736.
• [2]杨怀德,龙思远,吴明放,等.硼化物、锰去除再生Al-Si合金中铁元素机理研究[J].稀有金属材料与工程,2015,44(3):621-627.YANG Huai-de,LONG Si-yuan,WU Ming-fang,et al.Mechanism of iron removal from secondary Al-Si melt by boron compounds and Mn[J].Rare Metal Materials and Engineering,2015,44(3):621-627.
• [3]周敬恩,冉广.A356铸造铝合金的疲劳裂纹萌生及短裂纹扩展研究[J].金属热处理,2008,33(1):34-42.ZHOU Jing-en,RAN Guang.Study on fatigue crack intiation and propagation of cast aluminum alloy A356[J].Heat Treatment of Metals,2008,33(1):34-42.
• [4]Mahta M,Emamy M,Daman A,et al.Precipitation of Fe rich intermetallics in Cr-and Co-modified A413 alloy[J].International Journal of Cast Metals Research,2005,18(2):73-79.
• [5]李海,史志欣,王芝秀.Mn和Cr对Al-Mg-Si-Cu合金组织及性能的影响[J].材料热处理学报,2011,32(10):100-105.LI Hai,SHI Zhi-xin,WANG Zhi-xiu.Effects of Mn and Cr on microstructure and properties of Al-Mg-Si-Cu alloys[J].Transactions of Materials and Heat Treatment,2011,32(10):100-105.
• [6]Shabestari S G.The effect of iron and manganese on the formation of intermetallic compounds in aluminum-silicon alloys[J].Materials Science and Engineering A,2004,(383):289-298.
• [7]Gao J W,Shu D,Wang J,et al.Effects of Na2B4O7on the elimination of iron from aluminum melt[J].Scripta Materialia,2007,57(3):197-200.
• [8]Samuel F H,Samuel A M,Ouellet P,et al.Effect of Mg and Sr additions on the formation of intermetallics in Al-6 Wt pct Si-3.5 Wt pct Cu-(0.45)to(0.8)Wt pct Fe 319-type alloys[J].Metallurgical and Materials Transactions A,1998,29(12):2871-2884.
• [9]Sammel A M,Sammel F H,Doty H W.Observations on the formation ofβ-Al5Fe Si phase in 319 type Al-Si alloys[J].Journal of Materials Science,1996(31):5529-5539.
• [10]Cao X,Campbell J.The nucleation of Fe-Rich phases on oxide films in Al-11.5Si-0.4Mg cast alloys[J].Metallurgical and Materials Transactions A,2003,34(7):1409-1420.
• [11]范超,龙思远,杨怀德,等.Mn和Ce对再生Al-Si合金富铁相的影响[J].稀有金属材料与工程,2014,43(3):660-664.FAN Chao,LONG Si-yuan,YANG Huai-de,et al.Effect of Ce-rich mischmetal addition on microstructure and tensile properties of secondary Al-Si alloys[J].Rare Metal Materials and Engineering,2014,43(3):660-664.
• [12]陆文华.铸造合金及其熔炼[M].北京:机械工业出版社,2002.
• [13]Gao J W,Xie M X,Xia M X.Effects of boron and lanthanum on the impurity iron in aluminium melts[J].Mineral Processing and Extractive Metallurgy,2011,120(3):172-176.
• [14]Cao X,Campbell J.Morphology ofβ-Al5Fe Si phase in Al-Si cast alloys[J].Materials Transactions,2006,47(5):1303-1312.
• [15]Zhang L,Gao J,Damoah L N W,et al.Removal of iron from aluminum:a review[J].Mineral Processing and Extractive Metallurgy Review,2012,33(2):99-157.
• [16]于金,将建清,方峰,等.真空铝热还原法制备金属Sr的热力学分析及实验研究[J].金属学报,2005:41(8):824-828.YU Jin,JIANG Jian-qing,FANG Feng,et al.Thermodynamic analysis and experimental research on production of Sr using vacuum aluminothermic reduction[J].Acta Metallurgica Sinca,2005,41(8):824-828.
• [17]葛学元,李建国,谭红艳,等.A356合金熔体中Al2O3夹杂对变质剂Sr的影响[J].铸造,2008:57(1):49-52.GE Xue-yuan,LI Jian-guo,TAN Hong-yan,et al.Influence of alumina on modifier strontium in A356 alloy melt[J].Foundry,2008,57(1):49-52.
• [18]范学义,董允,林晓娉,等.A356铝合金Al-5Ti-1B和Al-Sr熔体处理遗传效应[J].材料热处理学报,2010:31(2):90-94.FAN Xue-yi,DONG Xun,LIN Xiao-ping,et al.Heredity of modified A356 alloy by addition of Al-5Ti-1B and Al-10Sr master alloys after remelting treatment[J].Transactions of Materials and Heat Treatment,2010:31(2):90-94.
• [19]Shabestari S G,Gruzleski J E.Modification of iron intermetallics by strontium in 413 aluminum alloys[J].AFS Transactions,1995:285-293.

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