[1]吴镇宇　熊新国　黄 霄　邓 希　张 鹏　梁素花　谭 崇 蒋 雯　郑 义　刘晗昱.浅谈DC铸造大规格铝合金铸锭宏观偏析的成因与控制方法[J].大众科技,2023,25(7):85-88.
　A Brief Discussion on the Causes and Control Methods of Macrosegregation in DC Casting of Large Size Aluminum Alloy Ingots[J].Popular Science & Technology,2023,25(7):85-88.
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浅谈DC铸造大规格铝合金铸锭宏观偏析的成因与控制方法()
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《大众科技》[ISSN:1008-1151/CN:45-1235/N]

卷:
25
期数:
2023年7
页码:
85-88
栏目:
轻工与化工
出版日期:
2023-07-20

文章信息/Info

Title:
A Brief Discussion on the Causes and Control Methods of Macrosegregation in DC Casting of Large Size Aluminum Alloy Ingots
作者:
吴镇宇1　熊新国2　黄 霄2　邓 希3　张 鹏2　梁素花1　谭 崇2 蒋 雯1　郑 义2　刘晗昱1
（1.广西产研院新型功能材料研究所有限公司，广西 南宁530200；2.南南铝业股份有限公司，广西 南宁 530031；3.广西壮族自治区产业技术研究院，广西 南宁530200）
关键词:
DC铸造; 铝合金; 大规格; 宏观偏析; 机理分析; 控制方法
Keywords:
DC casting;  aluminum alloy;  large size;  macrosegregation;  mechanism analysis;  control methods
文献标志码:
A
摘要:
宏观偏析是DC铸造大规格铝合金铸锭常见的一种冶金缺陷，严重时会恶化铸锭性能及成品质量。文章详细阐述了宏观偏析的形成机理，概括了影响宏观偏析的主要因素，针对性地提出了控制合金化元素及其含量、利用外场协助控制、优化铸造工艺参数、分流袋选用、晶粒细化剂的选用五项控制宏观偏析的具体措施，对实际生产有重要的指导意义。
Abstract:
Macrosegregation is a common metallurgical defect in DC casting of large size aluminum alloy, which can seriously deteriorate the performance of the ingot and the quality of the finished product. This article elaborates on the formation mechanism of macroscopic segregation, summarizes the main factors that affect macroscopic segregation, and proposes five specific measures to control macrosegregation, including controlling alloying elements and their content, utilizing external field assistance to control, optimizing casting process parameters, selecting diversion bags, and selecting grain refiners, which have important guiding significance for practical production.

参考文献/References:

[1]　NADELLA R, ESKIN D G, KATGERMN L, et.al. Effect of grain refinement on structure evolution, ‘‘Floating’’ gains, and centerline macrosegregation in direct-chill cast AA2024 alloy nillets[J]. Metallurgical and Materials Transactions A, 2007,(39A): 450-461.[2]　LIU X D, ZHU Q F LI Z M et al. Effect of casting speed on floating grains and macrosegregation of direct-chill cast 2024 alloy with intensive melt shearing[J]. Transactions of Nonferrous Metals Society of China, 2021, 31: 565-575.[3]　NADELLA R, ESKIN D, KATGERMAN L. Role of grain refining in hot cracking and macrosegregation in direct chill cast AA 7075 billets[J]. Materials Science and Technology, 2007, 23(11): 1327-1335．[4]　WENG Y Y, DING L P, ZHANG Z Z, et al. Effect of Ag addition on the precipitation evolution and interfacial segregation for Al-Mg-Si alloy[J]. Acta Materialia, 2019, 180: 301-316.[5]　李宝绵，夏军，张海涛，等. DC铸造5182铝合金大尺寸扁锭偏析及微观组织的试验研究[J]. 轻合金加工技术，2020，48(12): 25-31.[6]　ZUO Y B, CUI J Z, ZHAO Z H, et al. Effect of low frequency electromagnetic field on casting crack during DC casting superhigh strength aluminum alloy ingots[J]. Materials Science and Engineering: A, 2005, 406(1): 286-292.[7]　ROUSSET P, RAPPAZ M, HANNART B. Modeling of inverse segregation and porosity formation in directionally solidified aluminum alloys[J]. Metallurgical and Materials Transactions A,1995, 26: 2349-2358. [8]　SINGH A K, PARDESHI R, BASU B. Modelling of convection during solidification of metal and alloys[J]. Sadhana, 2001, 26: 139-162．[9]　THEVIK H J, MO A. The influence of micro-scale solute diffusion and dendrite coarsening upon surface macrosegregation[J]. International Journal of Heat and Mass Transfer, 1997, 40(9): 2055-2065. [10] 何志，徐学利，周好斌，等. 非平衡凝固过程中合金的溶质分凝和界面形态选择[J]. 铸造技术，2012，33(8): 907-909.[11] NADELLA R, ESKIN D G, DU Q, et al. Macrosegregation in direct-chill casting of aluminum alloy[J]. Progress in Materials Science, 2008, 53: 421-480.[12] ESKIN D G, NADELLA R, KATGERMAN L, et al. Effect of different grain structures on centerline macrosegregation during direct-chill casting[J]. Acta Materialia, 2008, 56: 1358-1365.[13] ASTON M A, GRANDIELD J F, JOHN D H, et al. The Effect of Grain Refinement and Cooling Rate on the Hot Tearing of Wrought Aluminium Alloys[C]. Materials Science Forum, 2006: 519-521.[14] 刘祥，REDRIKSSON H，ENGSTM G. 机械搅拌对Al及Al-Cu合金铸锭组织和宏观偏析的影响[J]. 东北大学学报: 自然科学版，1986，7(1): 1-8.[15] 杨林学，张立华，李瑞卿. 多源超声对2219铝合金铸锭凝固组织和成分偏析的影响[J]. 材料热处理学报，2019，40(3): 49-55.[16] 黄明哲. 超声外场对7085铝合金铸造微观偏析及第二相形成的影响[D]. 长沙: 中南大学，2014.[17] 张勤，崔建忠，路贵民，等. 电磁振荡法半连铸7075合金的微观组织及溶质元素分布[J]. 中国有色金属学报，2003(5): 1184-1191.[18] 郭世杰，薛冠霞，刘金炎，等. 电磁软接触铸造7050高强铝合金扁锭的组织和力学性能[J]. 中国有色金属学报，2010，20(7): 1282-1289.[19] ZALOZNIK M, ?RLER B. Modeling of macrosegregation in direct-chill casting of aluminum alloys: Estimating the influence of casting parameters[J]. Materials Science and Engineering: A, 2005(413-414): 85-91.20] ZHANG L L, ZHENG Q J, JIANG H X, et al. Jiang Interfacial energy between Al melt and TiB2 particles and efficiency of TiB2 particles to nucleate α-Al[J]. Scripta Materialia, 2019, 160: 25-28.[21] EASTON M, STJOHN D. Grain refinement of Aluminum alloys: PartⅡ. Confirmation of, and a mechanism for, the solute paradigm[J]. Metallurgical and Materials Transactions A , 1999, 30A: 1625-1633.

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备注/Memo

备注/Memo:
【收稿日期】2023-05-10【基金项目】广西壮族自治区产业技术研究院资助项目、南宁市新型功能材料技术创新中心能力建设（20221021）【作者简介】吴镇宇（1985－），男，广西产研院新型功能材料研究所有限公司工程师，从事金属材料研发工作。【通信作者】熊新国（1963－），男，南南铝业股份有限公司高级工程师，从事金属材料开发与设计工作。
更新日期/Last Update: 2023-08-16