丁海民,王同贺,张子寒,柳青

• 1:华北电力大学能源动力与机械工程学院
• 2:河北省电力机械装备健康维护与失效预防重点实验室

摘要(Abstract)：

通过计算流体仿真，结合保温沉淀试验研究了Al-5Ti-1B中间合金中的TiB_2颗粒在1070铝熔体内的沉淀过程及分布状态。结果表明：TiB_2颗粒在铝熔体内沉淀时，位于熔体中心区域的颗粒的沉淀速度更快，且大于Stokes计算的理论值；中心区域颗粒的快速沉降，导致四周区域的铝熔体产生扰动进而阻碍了四周区域内颗粒的沉淀，并且部分区域出现颗粒的上升运动；由于TiB_2颗粒不同的沉淀速度分布，造成其在底层中心区及壁面边界区的聚集情况更为严重，且在底部中心区域出现环状高密度分布区，并通过沉淀试验证实了这一分布状态的准确性。

关键词(KeyWords)： Al-5Ti-1B中间合金;TiB_2颗粒;沉淀;流体仿真

Abstract:

Keywords:

基金项目(Foundation): 北京市自然科学基金青年基金(2214079);; 国家自然科学基金(52071142);; 河北省自然科学基金(E2019502060);; 保定市科技计划项目(2172P005)

作者(Author): 丁海民,王同贺,张子寒,柳青

DOI: 10.13289/j.issn.1009-6264.2021-0528

参考文献(References)：

• [1] 胡谢君，张仁国，张晓燕，等.形变时效对不同Cu含量的稀土铝电工圆杆的影响[J].中国有色金属学报，2017,27(8):1597-1602.HU Xie-jun,ZHANG Ren-guo,ZHANG Xiao-yan,et al.Effect of strain aging on rare earth electrical round aluminum rods with different Cu contents[J].The Chinese Journal of Nonferrous Metals,2017,27(8):1597-1602.
• [2] 张强，韩钰，卢卫疆，等.高导电率硬铝导线综述[J].热加工工艺，2017,46(12):29-30.ZHANG Qiang,HAN Yu,LU Wei-jiang,et al.Review on hard aluminum alloy conductor wires with high conductivity[J].Hot Working Technology,2017,46(12):29-30.
• [3] Xu X X,Feng Y T,Yang P,et al.The influence of trace elements on the microstructures and properties of the aluminum conductors[J].Results in Physics,2018,11:1058-1063.
• [4] 黄元春，邵虹榜，肖政兵，等.Al-Ti-B合金中AlB2、TiB2和TiAl3的第一性原理研究[J].中国有色金属学报，2018,28(8):1491-1498.HUANG Yuan-chun,SHAO Hong-bang,XIAO Zheng-bing,et al.First principle study of AlB2,TiB2 and TiAl3 in Al-Ti-B alloy[J].The Chinese Journal of Nonferrous Metals,2018,28(8):1491-1498.
• [5] 刘蒙.铝合金晶粒细化剂发展概述[J].铸造技术，2018,39(10):2429-2432.LIU Meng.Development overview of grain refinement for aluminum alloys[J].Foundry Technology,2018,39(10):2429-2432.
• [6] Wang Q,Yang P,Zhang B R,et al.Microstructure and texture evolution of cold rolled 1070 Al alloy during the subsequent annealing treatment[J].Results in Physics,2019,13:102178.
• [7] 董衍蘅，贾志宏，温柏杨，等.稀土Sm对Al-7Si-0.3Mg合金微观组织的影响[J].中国有色金属学报，2020,30(3):479-488.DONG Yan-heng,JIA Zhi-hong,WEN Bai-yang,et al.Effect of rare earth Sm on microstructure of Al-7Si-0.3Mg aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2020,30(3):479-488.
• [8] 李红英，赵菲，阳慎兰.富Ce混合稀土加入量对铝合金组织与导电性能的影响[J].中国有色金属学报，2020,30(4):719-727.LI Hong-ying,ZHAO Fei,YANG Shen-lan.Effect of Ce-rich rare earth addition on microstructure and electrical conductivity of aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2020,30(4):719-727.
• [9] Emamy M,Mahta M,Rasizadeh J.Formation of TiB2 particles during dissolution of TiAl3 in Al-TiB2 metal matrix composite using an in situ technique[J].Composites Science Technology,2006,66(7):1063-1066.
• [10] Gan G S,Gao Q,Yang B,et al.Effect sedimentation of TiB2 particles on the microstructure of 7075 Al alloy[J].Advanced Materials Research,2014,904:50-53.
• [11] Zhang L L,Zheng Q J,Jiang H X,et al.Interfacial energy between Al melt and TiB2 particles and efficiency of TiB2 particles to nucleate α-Al[J].Scripta Materialia,2019,160:25-28.
• [12] Schaffer P L,Dahle A K.Settling behaviour of different grain refiners in aluminium[J].Materials Science Engineering A,2005,413:373-378.
• [13] 陈亚军，许庆彦，黄天佑.Al-Ti-B中间合金中第二相沉淀现象研究[J].北京科技大学学报，2007(5):465-469.CHEN Ya-jun,XU Qing-yan,HUANG Tian-you.Research on precipitation of second phases for Al-Ti-B master alloy refiner[J].Journal of University of Science and Technology Beijing,2007(5):465-469.
• [14] 于丽娜，刘相法，边秀房.钛化物在铝熔体中的沉淀现象[J].材料科学与工艺，2003(2):185-188.YU Li-na,LIU Xiang-fa,BIAN Xiu-fang.Deposition of compounds containing Ti in Al melts[J].Materials Science and Technology,2003(2):185-188.
• [15] Vinod K G,Murty B,Chakraborty M.Settling behaviour of TiAl3,TiB2,TiC and AlB2 particles in liquid Al during grain refinement[J].International Journal of Cast Metals Research,2010,23(4):193-204.
• [16] 熊莉芳，林源，李世武.k-ε湍流模型及其在FLUENT软件中的应用[J].工业加热，2007(4):13-15.XIONG Li-fang,LIN Yuan,LI Shi-wu.k-ε Turbulent model and its application to the FLUENT[J].Industrial Heating,2007(4):13-15.
• [17] Balogh M,Parente A,Benocci C.RANS simulation of ABL flow over complex terrains applying an Enhanced k-ε model and wall function formulation:Implementation and comparison for fluent and OpenFOAM[J].Journal of Wind Engineering and Industrial Aerodynamics,2012,104:360-368.
• [18] Shoev G V,Bondar Y A,Oblapenko G P,et al.Development and testing of a numerical simulation method for thermally nonequilibrium dissociating flows in ANSYS Fluent[J].Thermophysics and Aeromechanics,2016,23(2):151-163.
• [19] Li Y,Zhang J P,Fan L S.Numerical simulation of gas-liquid-solid fluidization systems using a combined CFD-VOF-DPM method:bubble wake behavior[J].Chemical Engineering Science,1999,54(21):5101-5107.
• [20] Lu L Q,Xu J,Ge W,et al.EMMS-based discrete particle method (EMMS-DPM) for simulation of gas-solid flows[J].Chemical Engineering Science,2014,120:67-87.
• [21] Rashidi S,Esfahani J A,Ellahi R.Convective heat transfer and particle motion in an obstructed duct with two side by side obstacles by means of DPM model[J].Applied Sciences,2017,7(4):431.
• [22] Xu X X,Feng Y T,Fan H,et al.The grain refinement of 1070 alloy by different Al-Ti-B mater alloys and its influence on the electrical conductivity[J].Results in Physics,2019,14(C):102482.

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