超声场及电磁场作用下水平连铸制备金属线材的研究
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摘要
水平连铸近年来发展极为迅速,由于工艺设备简单等诸多优势,被广泛应用于铸造行业制备高质量铸件。随着国民经济的不断发展,对金属线材的需求量日益增加,同时对其质量及生产率提出了更高的要求。目前,超声场及电磁场以其独特的性能在材料改性及新材料制备中的应用研究越来越广泛。作者参与了国家自然科学基金“复合场作用下液体金属的运动行为及控制”这一重大研究课题,研究了超声场及电磁场作用下金属线材的制备及其改性,取得科研成果如下:
     改进优化了水平连铸装置,成功将超声场及电磁场引入到水平连铸制备金属线材的过程中。为了提高铸坯质量及生产效率,在超声场作用下探索出一套制备Al-Si合金线材最佳的工艺参数,此时合金铸坯的微观组织均匀细小,力学性能最佳。采用静态模拟实验,研究了超声场对Al-Si合金除气净化及晶粒细化的影响。超声场对铝熔体产生显著的除气净化效果,且超声处理时间存在最佳值;初步分析超声场作用下晶粒的球化、细化可能是由于超声空化泡破碎产生的过冷生核所引起。
     分析了不同励磁电流条件下,电磁场对Al-Si合金水平连铸冷却曲线、凝固组织及成分偏析的影响规律。在电磁场作用下,洛仑兹力作用于凝固区域的金属,对其产生搅拌及软接触两种作用,从而对金属的凝固过程产生影响。施加电磁场后,Al-Si合金的开始结晶温度上升,同时凝固速度加快结晶温度间隔变小;当励磁电流为100A时,电磁场对凝固区域合金的作用效果最好,铸坯晶粒均匀细小且成分偏析得到了抑制。
     研究了AZ31镁合金的熔炼工艺并探索了不同材质的结晶器AZ31镁合金的水平连铸。采用RJ-2熔剂对镁熔体进行保护及精炼,同时利用Ar气体保护法阻止镁液的燃烧。探索了石墨及不锈钢两种材质的结晶器下镁合金的水平连铸。
Horizontal continuous casting is widely applied and researched for advantages such as simple facilities, etc. In recent years, with the development of industry and national economy, the needs of high quality metal wire increase quickly. Nowadays, ultrasonic field and electromagnetic field are successfully applied in material modification and new material preparation. The writer takes part in one project, which is "The dynamics and control of metal liquid with multi-field" supported by the National Natural Science Foundation. The preparation and modification of metal wire with ultrasonic field and electromagnetic field are researched. Main research results are as the following:
     Experimental apparatus of horizontal continuous casting is improved. The ultrasonic field and electromagnetic field are successfully conducted to prepare metal wire under horizontal continuous casting. In order to enhance the quality and production efficiency of Al-Si alloy ingots, the best technical parameters of horizontal continuous casting combined with ultrasonic field are established. The microstructures are uniform, fine and the mechanical properties are the best of all under these parameters. With ultrasonic field, the degassing effect and the grain refinement of Al-Si alloy are investigated using static experiment. The value of porosity volume of Al-Si alloy decreases obviously when the metal liquid is treated by ultrasonic field and the treatment time can be optimized. The expansion and collapse of cavities which results in the formation of nuclei may play the dominant important role in the formation of fine and globular grains.
     The influence of electromagnetic field on the cooling curve, solidification structure and solute segregation of horizontal continuously cast Al-Si alloy have been theoretically interpreted. Under electromagnetic field, Lorentz force acted on metal liquid can produce two effects: soft contact and electromagnetic stirring. The cooling curve shows that when the electromagnetic field is imposed during horizontal continuous casting, the nucleation temperature of the alloy increases and the solidification interval is shortened. When current is 100A, grains are refined and solute segregation is suppressed.
     To prevent the combustion of Mg, Mg melting is studied. The RJ-2 flux and Ar gas are used for protection and smelting. Based on experimental apparatus of horizontal continuously cast Al-Si alloy, the mold of graphite and stainless steel is respectively researched.
引文
[1] Andrew J G, Strandjord, Scott Popelar et al. Interconnecting to Aluminum- and Copper-Based. Semiconductors (Electroless-Nickle/Gold for Solder Bumping and Wire Bonding). Microelectronics Reliability, 2002,42:265-283.
    [2] S. Ramminger, N. Seliger, G. Wachutka. Reliability Model for Al Wire Bonds Subjected to Heel Crack. Failkures. Microelectronics Reliability, 2000, 40:1521-1525.
    [3] 郭大琦.提高陶瓷外壳封装集成电路自动铝丝楔焊键合质量的途径.微电子技术,1994,23(3):42-47.
    [4] 李自学,王凤生,张承军.不同状态的Si-Al丝对键合点根部损伤的影响.电子元件与材料,2001,9:1-5.
    [5] Kashiwabara M, Hattori S. Formation of Al-Au Intermettalic Compounds and Resistance Increase for Ultrasonic Al Wire Bonding. Review of the Electrical Communication Laboratory, 1996,17(6): 1001-1013.
    [6] 陈宇.集成电路封装用新型Al-1%Si键合线的研制:(硕士学位论文).兰州:兰州理工大学,2004.
    [7] 许小忠,刘强,程军.镁合金在工业及国防中的应用.华北工学院学报,2002,23(3):190-192.
    [8] 陈晓阳,曾大本.镁合金铸件的应用现状及发展前景.铸造,1999,(11):53-55.
    [9] 董长富.镁合金填丝TIG焊接工艺及组织性能分析:(硕士学位论文).大连:大连理工大学,2005.
    [10] 李克.金属熔体预处理及其组织细化技术的研究:(博士后论文).上海:上海交通大学,2004.
    [11] 李新涛.管线坯水平连铸工艺及外场改性研究:(博士学位论文).大连:大连理工大学,2006.
    [12] 薄希辉.Mg及退火对连续定向凝固铝硅合金键合线材料组织和性能的影响:(硕士学位论文).北京:北京科技大学,2005.
    [13] 陈琦.真空熔炼连续定向凝固铝硅合金的组织及变形行为研究:(硕士学位论文).北京:北京科技大学,2004.
    [14] 金文中,刘顺华.镁合金焊丝的热挤压-拉拔工艺及其变形机理.材料科学与工程,2005,13(5):466-469.
    [15] 顾曾迪,陈根宝,金心溥.有色金属焊接.北京:机械工业出版社,1995:314-320.
    [16] Takahashi H, oishi Y, Wakamatsu K and Kawabe N. Tensile properties and bending formability of drawn magnesium alloy pipes. Materials Science Forum, 2003: 419-422.
    [17] 陈振华.变形镁合金.北京:化学工业出版社,2005:10-14.
    [18] 董长富,刘黎明,苗玉刚.镁合金焊丝挤压成形过程挤压力的研究.塑性工程学报,2004,11(3):35-38.
    [19] 郭戈,乔俊飞.连铸过程控制理论与技术.北京:冶金工业出版社,2003.
    [20] 翁宇庆.最近五年(2002~2006)我国钢材品种的变化趋势.2007中国钢铁年会论文集,2007,11:1-5.
    [21] 曾昭昭.特种铸造.杭州:浙江大学出版社.1990.
    [22] 章仲禹.我国水平连铸技术发展的若干意见.南方钢铁,1997,97:1-7.
    [23] 顾维.水平连续铸钢的设备与工艺.铸造设备研究,1995,4:6-11.
    [24] 吴月华.水平连铸发展现状和展望.炼钢,1989,2:45-59.
    [25] 吴智文,倪满森,唐仲和.水平连铸结晶器内凝固传热数学模型.钢铁研究学报,1990,2:9-16.
    [26] 郭廷杰.大力推广水平连铸促进小钢厂节能.节能,1994,3:3-5.
    [27] 杨志强.我国水平连铸圆管坯生产现状.重庆钢铁高等专科学校校报,1993,8(3):31-35.
    [28] 王海生.铸铁水平连铸机凝固端及牵引控制设计研究与实验:(硕士学位论文).西安:西安理工大学,2004.
    [29] Ohno A. Continuous casting of single crystal ingots by the O.C. C process. Journals of Metals, 1986(38): 14-16.
    [30] 范新会,李建国,傅恒志.单晶连铸技术研究评述.材料导报,1996,3:1-61.
    [31] 黎沃光.热型连续铸造法的原理及应用.铸造.1996,12:39-44.
    [32] 李新涛,李丘林,李廷举等.电磁场对水平连铸紫铜管表面质量及组织性能的影响.中国有色金属学报,2004,14(12):2060-2065.
    [33] 李丘林,李新涛,李廷举等.空心铜管坯水平电磁连铸过程的电磁效应研究.西安交通大学学报,2005,39(9):1003-1006.
    [34] LI XT, LI TJ, LI XM et al. Study of ultrasonic melt treatment on the quality of horizontal continuously cast Al-1%Si alloy. Ultrasonics Sonochemistry, 2006,13:121-125.
    [35] 冯若.超声手册.南京:南京大学出版社,1999.
    [36] 程存弟,贺西平.功率超声振动系统研究进展.声学技术,1994,13(4):154-155.
    [37] W.P. Mason. Electromechanical Transducer and Wave filter. VanNostrand, New York, 1948.
    [38] 冯伟骏.功率超生对Pb-Sn合金凝固行为的影响:(硕士学位论文).大连:大连理工大学,2004.
    [39] E. Mori. Ultrasonics International 1977 Conference Proceedings, 1977: 262.
    [40] E. Mori. Ultrasonics International 1989 Conference Proceedings, 1989: 256.
    [41] 程存第.超声技术-功率超声及其应用.陕西:陕西师范大学出版社,1993:64-71.
    [42] 翟伟翔.智能化大功率超声电源的研制:(硕士学位论文).北京:华北电力大学,2002.
    [43] 汪承浩.“一种新型的超声加工深小孔的工具系统”一文讨论:非半波长变幅器.应用声学,1982,4:48-49.
    [44] 侯立琪,林仲茂,应崇福.半穿孔结构宽频带夹心换能器的理论分析.声学学报,1979,4:271-278.
    [45] Lin ZhongMao etal. A Novel, high Efficiency Ultrasonic Emulsification Device and its Applications. Ultrasonic Technology 1987, (Editor: KohjiToda), Toyohashi International Conferenceon Ultrasonic Technology, MY Tokyo, 1987,309-312.
    [46] 林书玉.纵-扭复合振动模式指数型复合超声变幅杆的研究.应用声学,1997,16(5):42-46.
    [47] 阮世勋.扭振超声变幅杆谐振参数测定方法的研究.应用声学,1996,15(2):27-33.
    [48] 阮世勋.几种扭振复合超声变幅杆的研究.应用声学,1998,17(1):21-27.
    [49] 林仲茂.20世纪功率超声在国内外的发展.声学技术,2000,19(2):101-105.
    [50] 应崇福.超声学.北京:科学出版社,1990.
    [51] 冯若,李化茂.声化学及其应用.合肥:安徽科技出版社,1990.
    [52] Campbell J. Effect of vibration during Solidification. Int Met Rev, 1981,2:71-104.
    [53] Eskin G I. Ultrasonic Treatment of Molten Aluminum. Metallurgia, Moscow: 1985,4:105-110.
    [54] J. SEIFERT, F. FISCHER. Horizontal Continuous Casting of Metals with Mould Excited by Ultrasonic Waves. Ulrasonics, 1977,15(4):154-158.
    [55] J. Pan, M. Yoshida, G. Sasaki et al. Ultrasonic Insert Casting of Aluminum Alloy. Scripta mater, 2000,43: 155-159.
    [56] Abramov O V. Action of high Intensity Ultrasound on Solidifying Metals. Ultrasonics, 1987,25(3):73.
    [57] V.O. Abramov, O.V. Abramov, F. Sommer et al. Properties of Al-Pb base alloys applying electromagnetic forces and ultrasonic vibration during casting. Materials Letters, 1995, 23:17-20.
    [58] V.O. Abramov, O.V. Abramov, F. Sommer et al. Influence of Si addition on the microstructure and the properties of Al-Pb base alloys prepared under quasi-weightlessness condition. Materials Letters, 1996, 29:67-71.
    [59] V.O. Abramov, O.V. Abramov, B.B. Straumal et al. Hypereutectic Al-Si based alloys with a thixotropic microstructure produced by ultrasonic treatment. Materials & Design, 1997, 18(4/6):323-326.
    [60] Abramov V, Abramov O, Bulgakov V et al. Solidification of aluminium alloys under ultrasonic irradiation using water-cooled resonator. Materials Letters, 1998, 37(9):27-34.
    [61] Dobatkin V I, Eskin G I. The Elect of High Intensity Ultrasound on the Phase Interface in Metals. Nauka, Moscow, 1986,3: 87-93.
    [62] Eskin G I. Ultrasonic Treatment of Melts in Shape Casting and Continuous Casting of Light Alloys. Mashinostroenie, Moscow, 19?5,3:65-69.
    [63] 何德坪,陈锋,舒光冀等.振动凝固细化晶粒新进展.兵器材料科学与工程,1989,(6):4-11.
    [64] 马立群,舒光冀,陈锋.金属熔体在超声场中凝固的研究.材料科学与工程,1995,13(4):2-7.
    [65] 马立群,廖恒成.金属熔体中高强超声空化气泡运动的数值研究.东南大学学报,1998,28(4):145-149.
    [66] 陈锋,舒光冀,马立群等.高能超声作用下数种金属基复合材料的制备及机制.复合材料学报,1998,15(3):12-16.
    [67] 郄喜望.功率超声对水平连铸Al-1%Si合金凝固过程影响的研究:(本科生毕业设计论文).大连:大连理工大学,2005.
    [68] 高学鹏.外场作用下水平连铸制备Al-1%Si合金线材的研究:(硕士学位论文).大连:大连理工大学,2006.
    [69] 李英龙,李宝绵,刘永涛等.功率超声对Al-Si合金组织和性能的影响.中国有色金属学报,1999,9(4):719-722.
    [70] 赵忠兴.超声波对合金结晶过程的均匀化作用.热加工工艺,1999,5:10-11.
    [71] 赵忠兴,穆光华,黄金日等.超声波对铸造合金组织和性能的影响.铸造,1996,(3):21-25.
    [72] 黄金日,薛立勤,穆光华等.超声波对铸造合金组织和机械性能的影响.湖北工学院学报,1996,11(4):29-33.
    [73] 赵忠兴,毕鉴智,郑一等.铝合金超声铸造技术.特种铸造及有色合金,1999,(1):13-14.
    [74] 胡化文,陈康华,黄兰萍等.超声溶体处理对7055铝合金铸态组织和性能的影响.铝加工,2004,(3):1-3.
    [75] 胡化文,陈康华,黄兰萍等.超声波熔体处理对铝合金组织和性能的影响.特种铸造及有色合金,2004,(4):11-13.
    [76] 胡化文,陈康华,黄兰萍等.超声熔体处理对Al-Zn-Mg-Cu合金显微组织和性能的影响.金属热处理,2005,30(5):43-46.
    [77] 陈康华,黄兰萍,胡化文等.熔体超声波处理对超强铝合金组织和性能的作用.中南大学学报(自然科学版),2005,36(3):354-357.
    [78] 李军文,桃野正.超声波导入杆与振动子之间的共振度对铝合金铸锭组织的影响及其模拟试验.轻合金加工技术,2004,32(5):6-8.
    [79] 李军文,桃野正.超声波振动处理时间对铸锭组织的影响.铸造技术,2004,25(1):44-46.
    [80] 李军文,桃野正.铸型对超声波铸锭组织的影响.轻合金加工技术,2004,32(6):12-14.
    [81] 李军文,付莹,桃野正.金属超声铸锭细化机理的试验研究.特种铸造及有色合金,2006年会专刊,2006:70-71.
    [82] 李军文,付莹,包华博.利用超声波去除金属熔体内气体的研究.中国机械工程学会第十一届全国铸造年会论文集,西安,2006,9:334-342.
    [83] 戚飞鹏,高守雷,侯旭等.功率超声对锡锑合金凝固组织的影响.上海大学学报,2003,9(1):42-46.
    [84] 王俊,周尧和,舒光冀等.用高能超声制备金属基复合材料的现状与发展.铸造,1997,12:40-42.
    [85] 王俊,陈锋,孙宝德.高能超声在制备颗粒增强金属基复合材料中的作用.上海交通大学学报,1999,33(7):813-816.
    [86] 王俊,陈峰,张力宁等.高能超声制备Al_2O_3-ZA22复合材料与性能研究.铸造,1997,5:1-3.
    [87] 马立群,陈锋,舒光冀.用高能超声法制备微细颗粒增强金属基复合材料.材料研究学报,1995,9(4):372-375.
    [88] Yang Y, Lan I, Li X C. Study on Bulk Aluminum Matrix Nano-composite Fabricated by Ultrosonic Dispersion of Nano-sized SiC Particles in Molten Aluminum Alloy. Materials Science and Engineering, 2004, 380(1-2):378-383.
    [89] Sartor B, Staats H, Seemann JH. Untersachungen uber Ultraschall dispergierung Von AL-Oxid in Zinnschmelzen. Metall, 1974, 28:771-777.
    [90] 中西治通,恒川好树,奥宫正洋.生成发热反应应用粒子/溶汤系超声波溶浸.日本金属学会志,1993,57(1):81-87.
    [91] 李玲,龚克成.超声波在纳米材料合成中的应用.材料导报,1998,12(4):18.
    [92] 李革胜,李华基,彭晓东.冷冻干燥制备TiO_2超细粉体研究.重庆大学学报(自然科学版),1999,22(2):50.
    [93] Nagano M, Ichinose H, Mizoguchi H et al. Preparation of Thin-films and Ultrafine Powders of (LA, SR)(2)NIO4 by a Spray-ICP Technique. Materials Letters, 1994,21(5-6):387.
    [94] 赵铁民,郝云彦,常新春等.超声气体雾化Nd_Fe_B粉末的形貌及微观结构.材料研究学报,1997,11(5):483.
    [95] Yeh J W, Jong S H, Liu W P. The Improved Microstructures and Properties of 7075 Alloys Produced by a Water-Cooling Centrifugal Casting Method. Metall Trans, 1996,27A:1933—1938.
    [96] Vives C. Effects of electromagnetic vibration on the microstructure of continuously cast of aluminium. Materials Science and Engineering, 1993, A173,169—172.
    [97] Farrel D E. Effect of flow on morphological stability during directional solidification. Physical Review B, 1987, 36(7): 4025—4027.
    [98] Uhlmann D R, Seward T P, Chalmers B. The effect of magnetic fields on the structure of metal alloy castings. Trans Metall Soc AIME, 1966, 236(4): 527-535.
    [99] Tzavaras A A. Solidification control by electromagnetic stirring-state of the art. Steelmaking Conference, 1983, 66: 89-107.
    [100] El-kaddah N, Szekely J. The electromagnetic force field, fluid field and temperature prefiles in. levitated metal droplets. Metallurgical Transactions B, 1983, 1413:401-410.
    [101] Meyer J L, Szekely, Kaddan. A comprehensive study of the induced current, the electromagnetic force field, and the velocity field in a complex electromagnetically driven flow system. Metallurgical Transactions B, 1987, 1813:529-538.
    [102] Ilegbusi O J, Szekely. Mathematical modeling of the electromagnetic stirring of molten metal-solid suspensions. Transactions, 1988, 28:97-102.
    [103] 徐国兴,张琪渔.电磁搅拌技术在连铸机上的应用及其对铸坯质量的影响.五钢科技.1997,(1):5.
    [104] 矶部浩一,前出弘文,菅原健.连铸轻压下方法.特开平6-12.
    [105] Fujisaki K. In-mold electromagnetic stirring in continuous casting. IEEE Transactions on Industry Applications, 2001, 37(4): 1098-1104.
    [106] Oh K S, Chang Y W. Macrosegregation behavior in continuously cast high carbon steel blooms and billets at the final stage of solidification in combination stirring. ISIJ International, 1995, 35(7): 866-875.
    [107] Spitzer K H, Reiter G, Schwerdtfeger K. Multi-Frequency Electromagnetic Stirring of Liquid Metals. ISIJ International, 1996,36(5): 487-492.
    [108] 严珩志,钟掘,毛大恒等.电磁场作用下铝及其合金的凝固结晶行为.中国有色金属学报,1996,6(3):158-159.
    [109] 陈崇峰.一种新型的连铸电磁搅拌技术.钢铁研究.1997,3:53-56.
    [110] Ayata K, Mori H, Tanigunchik et al. Low superheat teeming with eletromagnetic stirring. ISIJ International, 1995, 35(6): 680-685.
    [111] Getselev Z Y. Casting in an electromagnetic field. Journal of Metals, 1971, 23(10): 38.
    [112] 李丘林.空心管坯电磁连铸技术研究:(博士学位论文).大连:大连理工大学,2003.
    [113] 小岛阳,古井光明.材料电磁电磁铸造法动向.轻金属(日文),1993,43(6):335-339.
    [114] 张志峰,李廷举,温斌等.复合电磁场对连铸结晶器弯月面金属液运动行为及铸坯质量的影响.钢铁研究学报,2000年9月,第12卷增刊:36-40.
    [115] Vives C. Electromagnetic refining of aluminum alloys by the CREM process: part 1. working principle and metallurgical results. Metallurgical Transactions B, 1989, 20B(10): 623-629.
    [116] Vives C. Electromagnetic refining of aluminum alloys by the CREM process: part 2. specific practical problems and their solutions. Metallurgical Transactions B, 1989, 20B(10): 631-643.
    [117] Vires C, Ricou R. Experimental study of continuous electromagnetic casting of aluminum alloy. Metallurgical Transactions, 1985, 16B: 377-384.
    [118] 张勤.低频电磁场作用下铝合金半连续铸造工艺与理论的研究:(博士学位论文).沈阳:东北大学,2002.
    [119] 张勤,崔建忠.CREM法抑制7075铝合金半连铸坯中溶质元素宏观偏析的机制.稀有金属材料与工程,2005,34(4):627-631.
    [120] 张勤,班春燕,崔建忠等.CREM法半连铸Al合金过程中电磁场对溶质元素固溶的影响机理.物理学报,2003,52(10):2642-2648.
    [121] 左玉波,董杰,崔建忠.铸造工艺参数对超高强铝合金低频电磁半连续铸锭微观组织的影响.铸造,2005,54(5):455-458.
    [122] Naji Meidani AR, Hasan M. A study of hydrogen bubble growth during ultrasonic degassing of Al-Cu alloy melts. J. Mater. Process Tech, 2004,147:311-320.
    [123] Xu H, X Jian, T.T. Meek et al. Degassing of molten aluminum A356 using ultrasonic vibration. Materials letters, 2004,58:3669-3673.
    [124] 李军文,桃野正,田汤善章等.铸锭底部强制冷却的超声波除气效果.热加工工艺,2007,36(5):21-24.
    [125] 陈峰,何德坪,舒光冀.超声处理在金属及复合材料制备中的应用.材料导报,1994,5:13-15.
    [126] 大泽嘉昭,荒金吾郎,高森晋等.超声波振动对铝合金晶粒细化的影响.铸造工学,1999,71(2):98-103.
    [127] 高学鹏,李新涛,郄喜望等.超声场对Al-1%Si合金水平连铸坯显微组织及力学性能的影响.金属学报,2007,43(1):17-22.
    [128] 张勇,何德坪,陈群.超声振动细化Al-Fe合金的研究.兵器材料科学与工程,1992,15(9):1-5.
    [129] G.I. Eskin. Broad prospects for commercial application of the ultrasonic (cavitation) melt treatment of light alloys. Ultrasonics Sonochemistry, 2001, 8: 319-325.
    [130] X. Jian, H. Xu, T.T. Meek et al. Effect of power ultrasound on solidification of aluminum A356 alloy. Materials letters, 2005,19:190-193.
    [131] 胡汉起.金属凝固原理.北京:机械工业出版社,2000.
    [132] 大泽嘉昭,佐藤彰,生井亨,等.超声波振动向金属熔体的加入方法及对其凝固组织的影响.铸物,1993,65(4):288-293.
    [133] 石德珂.材料科学基础.北京:机械工业出版社,2000.
    [134] 贾非.电磁连续铸造过程工艺优化及组织性能研究:(博士学位论文).大连:大连理工大学,2002.
    [135] 王广厚.团簇物理的新进展.物理学进展,1994,14(2):121-136.
    [136] 李基永,刘让苏,周征谢等.液态金属铝及其凝固过程的微观结构转变特性.中国有色金属学报,1997,7(3):81-84.
    [137] 潘学民,边秀房,秦敬玉等.Cu-12%Al合金熔体内中程有序原子团簇.物理化学学报,2001,17(8):708-712.
    [138] 周尧和,胡壮麒,介万奇.凝固技术.北京:机械工业出版社,1998.
    [139] 班春燕,崔建忠,巴启先等.电磁场对7075铝合金液固相线温度的影响.特种铸造及有色合金,2004,1:26-27.
    [140] 田战峰,张志峰,徐骏等.电磁搅拌对AlSi7Mg合金显微组织的影响.热加工工艺,2006,35(9):46-49.
    [141] 赵志浩,崔建忠,左玉波等.低频电磁场对水平半连续铸造7075铝合金的影响.东北大学学报,2005,25(1):255-258.
    [142] 张津,章宗和.镁合金及应用.北京:化学工业出版社,2004.
    [143] 于延浩.镁合金电磁连铸成型技术研究:(硕士学位论文).大连:大连理工大学,2006.
    [144] 王冰.热挤压法制备镁合金焊丝及其焊接接头分析:(硕士学位论文).西安:西安理工大学,2007.
    [145] 常量.AZ31镁合金水平连铸板材轧制工艺研究:(硕士学位论文).上海:上海交通大学,2007.
    [146] 张诗昌,段汉桥,蔡启周等.镁合金的熔炼工艺现状及发展趋势.特种铸造及有色合金,2002年压铸专刊:310-313.
    [147] Couling S L. Melting Mg Under Air/SF6 Protective Atmospheres. Light Metal Age, 1977,10:12-14.

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