·196 工程科学学报，第44卷.第2期 [1]Wang Z H,Li S,Ge Y,et al.Research on microstructure and [11]Yokoya S,Takagi S,Iguchi M,et al.Swirling effect in immersion mechanical properties and fracture splitting properties of forged nozzle on flow and heat transport in billet continuous casting mold. connecting rod of C70S6 non-quenched and tempered steel.Hor ISIJ Int,1998,38(8):827 Working Technol,2015,44(19):39 [12]Li S X,Zhang X M,Li L,et al.Representation and effect of (王占花，李慎，葛宇，等.C70S6非调质钢锻造连杆的组织力学 mushy zone coefficient on coupled flow and solidification 性能和胀断性能研究.热加工工艺，2015,44(19)：39) simulation during continuous casting.Chin J Eng,2019,41(2): [2]Kang T,Liu X Y,Yang J H,et al.Analysis on cause of off- 199 qualified continuous-rolling products of steel C70S6 BY by (李少翔，张晓萌，李亮，等.连铸流动与凝固耦合模拟中糊状区 ultrasonic detection and process improvement.Special Steel,2019, 系数的表征及影响.工程科学学报，2019,41(2)：199) 40(2):21 [13]Sun H B,Li L J,Wu XX,et al.Effect of subsurface negative (康活，刘向艳，杨建华，等.胀断连杆用C7OS6BY钢连轧材探伤 segregation induced by M-EMS on componential homogeneity for 不合格原因分析和工艺改进.特殊钢，2019,40(2)：21) bloom continuous casting.Metall Res Technol,2018,115(6):603 [3]JiY,Tang H Y,Lan P.et al.Effect of dendritic morphology and [14]Zhang WJ,Luo S,Chen Y,et al.Numerical simulation of fluid central segregation of billet castings on the microstructure and flow,heat transfer,species transfer,and solidification in billet mechanical property of hot-rolled wire rods.Steel Res In,2017. continuous casting mold with M-EMS.Metals,2019,9(1):66 88(8):1600426 [15]Bridge M R,Rogers G D.Structural effects and band segregate [4]Li B.Zhang Z H,Liu H S,et al.Characteristics and evolution of formation during the electromagnetic stirring of strand-cast steel. the spot segregations and banded defects in high strength corrosion Metall Trans B,1984,15(3):581 resistant tube steel.Acta Metall Sin,2019,55(6):762 [16]Wu H J,Wei N,Bao Y P,et al.Effect of M-EMS on the (李博，张忠铧，刘华松，等.高强耐蚀管钢点状偏析及带状缺陷 solidification structure of a steel billet.Int J Miner Metall Mater. 的特征与演变.金属学报，2019,55(6)：762) 2011,18(2):159 [5]Raihle C M,Sivesson P,Tukiainen M,et al.Improving inner [17]Wang X C,Wang S Q,Zhang L F,et al.Analysis on the deflection quality in continuously cast billets:comparison between mould angle of columnar dendrites of continuous casting steel billets electromagnetic stirring and thermal soft reduction.Ironmaking under the influence of mold electromagnetic stirring.Metall Mater Steelmaking,1994,21(6):487 Trans A,2016,47(11):5496 [6]Oh K S,Shin Y K,Chang Y W.The role of combination stirring [18]Griffiths W D,McCartney D G.The effect of electromagnetic and final stirring pool thickness on center defects of continuous stirring during solidification on the structure of Al-Si alloys.Ma- cast high carbon steel blooms.Trans Iron Steel Soc,1994,21(4): ter Sci Eng A,1996,216(1-2:47 43 [19]Takahashi T,Ichikawa K,Kudou M,et al.The effect of fluid flow [7]Spitzer K H,Dubke M,Schwerdtfeger K.Rotational on the macrosegregation in steel ingot.Tetsu Hagane,1975,61: electromagnetic stirring in continuous casting of round strands 2198 Metall Trans B,1986,17(1):119 (高橘忠義，市川洌，工藤昌行，等.铜塊)凝固偏析二书上（寸 [8]Yu Z,Lei Z S,Jia HH,et al.Numerical simulation of flow field 溶渴流動)影缨.铁上鋼，1975,61：2198) using swirling flow nozzle in continuous casting billet mould / [20]Geng DQ,Lei H,He J C,et al.Effect of electromagnetic swirling Proceedings of 4th International Conference on Continuous flow in slide-gate SEN on flow field in square billet continuous Casting of Steel in Developing Countries.Beijing,2008:554 casting mold.Acta Metall Sin (Engl Lem),2012,25(5):347 [9]Sun H B,Li L J,Wu XX,et al.Control of segregation and [21]Xu Y,Xu X J,Li Z,et al.Dendrite growth characteristics and hardenability band width by optimizing M-EMS parameters for segregation control of bearing steel billet with rotational gear steel.Iron Steel,2018,53(8):55 electromagnetic stirring.High Temp Mater Processes,2007, (孙海波，李烈军，吴学兴，等.基于M-EMS工艺优化的齿轮钢偏 36(4):339 析及淬透性带宽控制.钢铁，2018,53(8)：55) [22]Niu L,Qiu S T,Zhao J X,et al.Effects of continuous casting [1]Li S X,Wang P,Lan P,et al.Melt flow and heat transfer at the process parameters on carbon segregation degree of 38CrMoAl crater end of round billet continuous casting using final steel big round billet.J Iron Steel Res,2018,30(5):359 electromagnetic stirring.Chin J Eng,2019,41(6):748 (牛亮，仇圣桃，赵俊学，等.连铸工艺参数对38CMoA大圆坯碳 (李少翔，王璞，兰鹏，等.圆坯凝固末端电磁搅拌作用下的流动 偏析的影响.钢铁研究学报，2018,30(5)：359) 与传热行为.工程科学学报，2019,41(6)：748) [23]Beckermann C,Diepers H J.Modeling melt convection in phaseWang  Z  H,  Li  S,  Ge  Y,  et  al.  Research  on  microstructure  and mechanical  properties  and  fracture  splitting  properties  of  forged connecting  rod  of  C70S6  non-quenched  and  tempered  steel. Hot Working Technol, 2015, 44（19）: 39 （王占花, 李慎, 葛宇, 等. C70S6非调质钢锻造连杆的组织力学 性能和胀断性能研究. 热加工工艺, 2015, 44（19）：39） [1] Kang  T,  Liu  X  Y,  Yang  J  H,  et  al.  Analysis  on  cause  of  off￾qualified  continuous-rolling  products  of  steel  C70S6  BY  by ultrasonic detection and process improvement. Special Steel, 2019, 40（2）: 21 （康湉, 刘向艳, 杨建华, 等. 胀断连杆用C70S6 BY钢连轧材探伤 不合格原因分析和工艺改进. 特殊钢, 2019, 40（2）：21） [2] Ji Y, Tang H Y, Lan P, et al. Effect of dendritic morphology and central  segregation  of  billet  castings  on  the  microstructure  and mechanical  property  of  hot-rolled  wire  rods. Steel Res Int,  2017, 88（8）: 1600426 [3] Li B, Zhang Z H, Liu H S, et al. Characteristics and evolution of the spot segregations and banded defects in high strength corrosion resistant tube steel. Acta Metall Sin, 2019, 55（6）: 762 （李博, 张忠铧, 刘华松, 等. 高强耐蚀管钢点状偏析及带状缺陷 的特征与演变. 金属学报, 2019, 55（6）：762） [4] Raihle  C  M,  Sivesson  P,  Tukiainen  M,  et  al.  Improving  inner quality  in  continuously  cast  billets:  comparison  between  mould electromagnetic  stirring  and  thermal  soft  reduction. Ironmaking Steelmaking, 1994, 21（6）: 487 [5] Oh K S, Shin Y K, Chang Y W. The role of combination stirring and  final  stirring  pool  thickness  on  center  defects  of  continuous cast high carbon steel blooms. Trans Iron Steel Soc, 1994, 21（4）: 43 [6] Spitzer  K  H,  Dubke  M,  Schwerdtfeger  K.  Rotational electromagnetic  stirring  in  continuous  casting  of  round  strands. Metall Trans B, 1986, 17（1）: 119 [7] Yu Z, Lei Z S, Jia H H, et al. Numerical simulation of flow field using  swirling  flow  nozzle  in  continuous  casting  billet  mould  // Proceedings of 4th International Conference on Continuous Casting of Steel in Developing Countries. Beijing, 2008: 554 [8] Sun  H  B,  Li  L  J,  Wu  X  X,  et  al.  Control  of  segregation  and hardenability  band  width  by  optimizing  M-EMS  parameters  for gear steel. Iron Steel, 2018, 53（8）: 55 （孙海波, 李烈军, 吴学兴, 等. 基于M-EMS工艺优化的齿轮钢偏 析及淬透性带宽控制. 钢铁, 2018, 53（8）：55） [9] Li S X, Wang P, Lan P, et al. Melt flow and heat transfer at the crater  end  of  round  billet  continuous  casting  using  final electromagnetic stirring. Chin J Eng, 2019, 41（6）: 748 （李少翔, 王璞, 兰鹏, 等. 圆坯凝固末端电磁搅拌作用下的流动 与传热行为. 工程科学学报, 2019, 41（6）：748） [10] Yokoya S, Takagi S, Iguchi M, et al. Swirling effect in immersion nozzle on flow and heat transport in billet continuous casting mold. ISIJ Int, 1998, 38（8）: 827 [11] Li  S  X,  Zhang  X  M,  Li  L,  et  al.  Representation  and  effect  of mushy  zone  coefficient  on  coupled  flow  and  solidification simulation  during  continuous  casting. Chin J Eng,  2019,  41（2）: 199 （李少翔, 张晓萌, 李亮, 等. 连铸流动与凝固耦合模拟中糊状区 系数的表征及影响. 工程科学学报, 2019, 41（2）：199） [12] Sun  H  B,  Li  L  J,  Wu  X  X,  et  al.  Effect  of  subsurface  negative segregation induced by M-EMS on componential homogeneity for bloom continuous casting. Metall Res Technol, 2018, 115（6）: 603 [13] Zhang W J, Luo S, Chen Y, et al. Numerical simulation of fluid flow,  heat  transfer,  species  transfer,  and  solidification  in  billet continuous casting mold with M-EMS. Metals, 2019, 9（1）: 66 [14] Bridge  M  R,  Rogers  G  D.  Structural  effects  and  band  segregate formation  during  the  electromagnetic  stirring  of  strand-cast  steel. Metall Trans B, 1984, 15（3）: 581 [15] Wu  H  J,  Wei  N,  Bao  Y  P,  et  al.  Effect  of  M-EMS  on  the solidification structure of a steel billet. Int J Miner Metall Mater, 2011, 18（2）: 159 [16] Wang X C, Wang S Q, Zhang L F, et al. Analysis on the deflection angle  of  columnar  dendrites  of  continuous  casting  steel  billets under the influence of mold electromagnetic stirring. Metall Mater Trans A, 2016, 47（11）: 5496 [17] Griffiths  W  D,  McCartney  D  G.  The  effect  of  electromagnetic stirring during solidification on the structure of Al‒Si alloys. Ma￾ter Sci Eng A, 1996, 216（1-2）: 47 [18] Takahashi T, Ichikawa K, Kudou M, et al. The effect of fluid flow on  the  macrosegregation  in  steel  ingot. Tetsu Hagané,  1975,  61: 2198 （高橋忠義, 市川洌, 工藤昌行, 等. 鋼塊の凝固偏析におよぼす 溶湯流動の影響. 鉄と鋼, 1975, 61：2198） [19] Geng D Q, Lei H, He J C, et al. Effect of electromagnetic swirling flow  in  slide-gate  SEN  on  flow  field  in  square  billet  continuous casting mold. Acta Metall Sin (Engl Lett), 2012, 25（5）: 347 [20] Xu  Y,  Xu  X  J,  Li  Z,  et  al.  Dendrite  growth  characteristics  and segregation  control  of  bearing  steel  billet  with  rotational electromagnetic  stirring. High Temp Mater Processes,  2007, 36（4）: 339 [21] Niu  L,  Qiu  S  T,  Zhao  J  X,  et  al.  Effects  of  continuous  casting process  parameters  on  carbon  segregation  degree  of  38CrMoAl steel big round billet. J Iron Steel Res, 2018, 30（5）: 359 （牛亮, 仇圣桃, 赵俊学, 等. 连铸工艺参数对38CrMoAl大圆坯碳 偏析的影响. 钢铁研究学报, 2018, 30（5）：359） [22] [23] Beckermann  C,  Diepers  H  J.  Modeling  melt  convection  in  phase · 196 · 工程科学学报，第 44 卷，第 2 期