超快冷却条件下温度场数值模拟

:2003208226:(50104004):(1975-),,,;(1953-),,,,;(1942-),,,,25420044()JournalofNortheasternUniversity(NaturalScience)Vol125,No.4Apr.2004:100523026(2004)0420360203,,(,110004):,:1200,6,3m/s,10kW/(m2)70/s;,,,:;;;;:TG33:AUFC(UltraFastCooling)[14],[5,6]UFC,,,11.14060mm,,,,k92T9x2=9T9t(1),k,[7]1.2Crank2Nicolson,Crank2Nicolson[8],,,,(2)(4),,,-Tl+1i-1+2(1+)Tl+1i-Tl+1i+1=Tli-1+2(1-)Tli+Tli+1,(2)(2+Bio+)Tl+10-Tl+11=(Tl1+2BioTw)+(2-Bio-)Tl0,(3)-Tl+1m+(2+BiD+)Tl+1m+1=(Tlm+2BiDTw)+(2-BiD-)Tlm+1(4),=kt(x)2,;Bio,BiD;T0,Tm+1;Tw2,0108%,[9]UFC32.12050mm©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[10],Hoogovens2UGB[1],11Fig.1LayoutofUFCsystem2.2,1200,180mm1200mm,6(180/154/128/102/76/55/40(mm)),40mm1200mm,:50;100;2500W/(m2K);0182121Fig.2TemperaturefieldofslabatpyrometerNo.12.3,,,,,9:40mm;39,41;0105s;1mm;27176W/(mK);66316J/(kgK);513310-6m2/s;0126653m/s,UFC,2,;;,,(316,10,1520kW/(m2))C++,Origion,33Fig.3Time2dependenttemperaturedistributionofthestripinintermediaterolling3(1),,,,h2kW/(m2),,(2),1634:©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(3),:[1]SimonP,FischbachJP,RicheP.Ultra2fastcoolingontherun2outtableofthehotstripmill[J].LaRevuedeMetallurgie,CahiersdpInformationsTechniques,1996,93(3):409-415.[2]SimonP,RichePH.Ultrafastcoolinginthehotstripmill[J].VereinDeutscherEisenhuttenleute,1994,(3):179-183.[3]LeeuwenYV,OninkM,SietsmaJ.Thegamma2alphatransformationkineticsoflowcarbonsteelsunderultra2fastcoolingconditions[J].ISIJInternational,2001,41(9):1037-1046.[4]HouyouxC,HermanJC,SimonP,etal.Metallurgicalaspectsofultrafastcoolingonahotstripmill[J].LaRevuedeMetallurgie,CahiersdpInformationsTechniques,1997,97:58-59.[5]CantinleauxP,NeutjensJ,RicheP.UltrafastcoolingontheCarlamhotstripmill[A].21esJourneesSiderurgiquesInternationales[C].Paris,2000.232-233.[6]BuzzichelliG,AnelliE.PresentstatusandperspectivesofEuropeanresearchinthefieldofadvancedstructuralsteels[J].ISIJ,2002,42(12):1355-1356.[7],[M]:,1998.85-87(YangSM,TaoWQ.Heattransfer[M].Beijing:HigherEducationPress,1998.85-87.)[8]ChapraSC,CanaleRP.Numericalmethodsforengineers(3rdedition)[M].NewYork:McGraw2HillInc,2000.832-844.[9][M],,,:,1990.195-196(IronandSteelInstituteofJapan.Platestriprollingtheoryandpractice[M].WangGD,WuGL,BiYW,etal.Beijing:ChineseRailwayPress,1990.195-196.)[10],2050mm[J],1999,(1):14(HuangCQ,ChenJR.IntroductionoflowertemperaturerollingtechnologyinBaogang2050mmhotstripmill[J].BaoGangTechnology,1999,(1):14.)SimulationonTemperatureFieldUnderUltraFastCoolingPENGLiang2gui,LIUXiang2hua,WANGGuo2dong(StateKeyLaboratoryofRolling&Automation,NortheasternUniversity,Shenyang110004,China.Correspondent:PENGLiang2gui,E2mail:[e-mail])Abstract:Temperaturefieldunderultrafastcooling(UFC)issimulatedbyfinite2differencemethod.Theresultsshowthatwhenaslabwhichwasrolledfrom180mmto40mmby6passesataninitialtemperature1200entersintoaUFCzonestandingbetweentheroughingmillandfinishingmillat3m/s,awatercoolingrate70/scanbeobtainediftheheat2exchangecoefficientisupto10kW/(m2).Atthesametime,theentrancefinishingtemperaturemustbecorrectedbecauseofthestrongtemperaturerecoveryafterUFC.Keywords:ultrafastcooling;temperaturefield;entrancefinishingtemperature;heatexchangecoefficient;hotstripmill(ReceivedAugust26,2003),,,(LMI);LMI,,;,,,,,,263()25©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.