杨林学,张立华,李瑞卿

• 1:中南大学轻合金研究院
• 2:高性能复杂制造国家重点实验室

摘要(Abstract)：

为研究超声声源数量对2219铝合金铸锭凝固组织与成分分布的影响,在直径为630 mm半连续热顶铸造实验中,分别对熔体施加不同声源数量的超声处理,成功制备了4组不同工艺的高质量铸锭。并利用光学显微镜、直读光谱仪等仪器对铸锭横切面进行凝固组织与成分检测。结果表明:在熔体中施加超声处理能有效地细化组织,减小晶粒尺寸,并随着声源数量的增加,晶粒细化效果得到增强,但显微组织的均匀性减弱;对铝熔体施加超声处理,溶质元素的宏观偏析程度也得到显著改善,但这种效果随着声源数量的增加而减弱。

关键词(KeyWords)： 铝合金;超声铸造;声源数量;组织细化;成分偏析

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51575539,51475480,U1637601)

作者(Author): 杨林学,张立华,李瑞卿

DOI: 10.13289/j.issn.1009-6264.2018-0352

参考文献(References)：

• [1] 刘燕.贮箱用2219铝合金热处理工艺的研究[D].天津:天津大学,2014.LIU Yan.Study on heat treatment process of 2219 aluminum alloy for storage tank[D].Tianjin:Tianjin University,2014.
• [2] 阳代军,徐坤和,丁鹏飞,等.2219铝合金大直径圆锭铸造性能分析及其改进措施[J].航天制造技术,2014(6):1-5.YANG Dai-jun,XU Kun-he,DING Peng-fei,et al.Analysis and improvement measures on casting property of 2219 aluminium alloy large diameter round ingot[J].Aerospace Manufacturing Technology,2014 (6):1-5
• [3] 王喜文.中国制造2025:从工业大国到工业强国[J].物联网技术,2015,5(5):3-4.WANG Xi-wen.China made 2025:From industrial country to industrial power[J].Chinese Staff Education,2015,5(5):3-4
• [4] Eskin G I,Pimenov Y P,Makarov G S.Effect of cavitation melt treatment on the structure refinement and property improvement in cast and deformed hypereutectic Al-Si alloys[C]//Materials Science Forum.1997:65-70.
• [5] Eskin G I.Broad prospects for commercial application of the ultrasonic (cavitation) melt treatment of light alloys[J].Ultrasonics Sonochemistry,2001,8(3):319-325.
• [6] Eskin G I,Eskin D G.Ultrasonic Treatment of Light Alloy Melts[M].CRC Press/Taylor and Francis Group,1998.
• [7] Huang H J,Yi-Fan X U,Shu D,et al.Effect of ultrasonic melt treatment on structure refinement of solidified high purity aluminum[J].Transactions of Nonferrous Metals Society of China,2014,24(7):2414-2419.
• [8] Li X Q,Li R Q,Dong F,et al.Simulation and experimental study of cavitation region caused by longitudinal and transverse vibration of casting ultrasonic radiator[C]//Materials Science and Engineering Conference Series.Materials Science and Engineering Conference Series,2015:052052.
• [9] 李瑞卿,李晓谦,陈平虎,等.超声空化对大规格高强铝合金热顶铸造凝固组织的影响及作用机理[J].中南大学学报:自然科学版,2016,47(10):3354-3360.LI Rui-qing,LI Xiao-qian,CHEN Ping-hu,et al.Influence and mechanism of ultrasonic cavitation on the solid structure of hot top cast s in large size high strength aluminum alloy[J].Journal of Central South University:Natural Science Edition,2016,47(10):3354-3360.
• [10] 钟贞涛,李瑞卿,李晓谦,等.超声处理对2219大规格铝锭微观组织与宏观偏析的影响[J].工程科学学报,2017,39(9):1347-1354.ZHONG Zhen-tao,LI Rui-qing,LI Xiao-qian,et al.Effects of ultrasonic treatment on microstructures and macro segregation of 2219 large aluminum ingot[J].Engineering Science Journal,2017,39(9):1347-1354.
• [11] 蒋日鹏,李晓谦,李开烨,等.超声对铝合金凝固传热与组织形成的影响与作用机制[J].中南大学学报:自然科学版,2012,43(10):3807-3813.JIANG Ri-peng,LI Xiao-qian,LI Kai-ye,et al.Influence and mechanism of ultrasound on solidification,heat transfer and tissue formation of aluminum alloy[J].Journal of Central South University:Natural Science Edition,2012,43(10):3807-3813.
• [12] 刘荣光.超声波在铝熔体中的声场分布和空化效应及其对凝固过程影响[D].长沙:中南大学,2008.LIU Rong-guang.Sound field distribution and cavitation effect in aluminum melt and effect on solidification process and its effect on solidification process[D].Changsha:Central South University,2008.
• [13] 李新涛,赵建强.功率超声对水平连铸 Al-1%Si 合金凝固的影响[J].稀有金属材料与工程,2006,35(2):284-286.LI Xin-tao,ZHAO Jian-qiang.Effect of power ultrasound on solidification of Al-1%Si alloy in horizontal continuous casting[J].Rare Metal Materials and Engineering,2006,35(2):284-286.
• [14] 吴钰.超声振动对7050铝合金熔体凝固动力学过冷度的影响[D].长沙:中南大学,2009.WU Yu.Effect of ultrasonic vibration on kinetic undercooling of aluminum alloy melt during solidification[D].Changsha:Central South University,2009.
• [15] Jin F,Qi Z.Effects of physical fields on solidification structure of metals[J].Chinese Journal of Nonferrous Metals,2002(1):11-15
• [16] Aziz M J.Model for solute redistribution during rapid solidification[J].Journal of Applied Physics,1982,53(2):1158-1168.

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