新一代控制轧制和控制冷却技术与创新的热轧过程

:2009205211:(2003AA33G010):(1942-),,,,,30720097()JournalofNortheasternUniversity(NaturalScience)Vol130,No.7Jul.2009(,110004):(TMCP),TMCP,TMCPTMCP,,,,TMCP,:;;;;:TG335:A:100523026(2009)0720913210NewGenerationTMCPandInnovativeHotRollingProcessWANGGuo2dong(TheStateKeyLaboratoryofRollingandAutomation,NortheasternUniversity,Shenyang110004,China.Correspondent:WANGGuo2dong,professor,E2mail:[e-mail])Abstract:Anew2generationTMCP(thermo2mechanicalcontrolprocess)withultrafastcoolingascoretechniquewassuggestedinsteadoftheconventionalTMCPinwhichsomeproblemsaretobesolved.Describestheultrafastcoolingtechniquetheoreticallyandrelevantequipmentdevelopedforcommercialapplicationsindetail.Withthegrainrefining,precipitationandphasetransformationstrengthening,thenew2generationTMCPwasverifiedavailabletomakefullusethepotentialofsteels,saveresourcesandenergyandoptimizeexistingrollingprocess,thusprovidingbeneficiallyasustainabledevelopmentforironandsteelindustry.Someexamplesaregiventoshowthecharacteristicsofthenew2generationTMCPintherollingprocessesofdifferentproductsespeciallyitsbroadprospectsinapplication.Keywords:steel;hotrolling;newgenerationTMCP;ultrafastcooling;strengthening1TMCP(NG2TMCP)1.1TMCP,TMCP,20TMCP,,[1],,,,,,,,,,;,Nb,,,(),,,,,,,,DQ(directquench),,,DQ,,,,,,,,,,,,,,Nb800950,,Nb,,,,,,,,1.2NG2TMCP,,,,,4R,[2]TMCP,,,TMCPTMCP,NG2TMCP[3]1.2.1HTP,,,,,,,,,TMCP(HTP),,TMCP,,,(),,,,,,,,,1.2.2,,,,,,,,,,,,,CRM(UFC)[4],4mm400/sJFESuperOLACH,,3mm700/s[5],419()30(RAL)RAL20mm,400/s,,RAL,,,1.2.3,,,,,,1.2.4,,,,,,,,,TMCP,,,TMCP2NG2TMCP2.1C,N,,,;Mn,Cu,Ni,Cr,,,,,,,,,C2Mn,2.2HSLA,,,,,,,,,Nb,800950,,HSLA,NG2TMCP,,,,,,,,2.3,,,,,HSLA,,GladmanOrowan2Ashby(1)[6]:=5.9f1/2…xln(…x/2.510-4)(1):,MPa;f;…x,…x=D(2/3)1/2,D,m(1),,,,HSLA,800950,,5197:,NG2TMCP,,,,,,,,,,NG2TMCP,,2.4,,,,,,,(AHSS),,,,,1AHSS,EPTRIP,(),,,,85%,(),,,,;300500,;,TRIP;,,,,,,1AHSSFig.1EffectofcoolingpathonmicrostructureofAHSSsteel,NG2TMCP,,,,,33.1,,,,,,,,,,(2)[7],619()30,20m,20m/s,13m,,,,10mm4,,,,,,,,2Fig.2Coolingdeviceforultrafastcoolingafterrolling,,,,,,,335MPa20MnSiHRB400,HRB500,,3.2,,,,,,3Q235[8],[3],,,3Fig.3SofteninginhotstriprollingprocessRAL,,,TMCPCSP(),550,600MPa,[9]1450,,Q235,Q345,2250+ACC,,,HSLA42250NG2TMCP10m,,,,,,,,,,,,,,,,,,2000mm7197:,42250Fig.4LayoutofcoolingcontrolsystemafterrollingonthehotstripmillinLianSteel,Hunan,China3.3,,,,TMCP,,1998,JFE(NKK)Super2OLAC(superon2lineacceleratedcooling)[10](5),,Super2OLAC,,,,,,,5JFESuper2OLACFig.5Super2OLACsysteminJFEplant20032004JFE()Super2OLAC[11]Super2OLAC,,,,RAL,,20m,ACC,,810m;ACC,2007,(),3000UFC+ACC,(6),4300UFC+ACC,4300DQ,ACC,TMCP6Fig.6UltrafastcoolingsystemoftheplatemillinJingyecorporation,Hebei,China3.4H,,819()30,,H,H,RAL,,,H,H,H4NG2TMCP:4.1+:(),100m,,RAL,,CSP,540MPa590MPa,,C,,,,,,,,,,,,,4.2:GCr15,,GCr15700900,700850,RAL[12],,,,,(),,,,,,,,,,4.3HSLA:(),,,NG2TMCP,,,,,210nm,RALHSLATMCPNG2TMCP,(,%)01075C,0128Si,1178Mn,01079Mo,01060Ti,01055Nb7NG2TMCP8,NG2TMCP,9166nm,TMCP,33181nmNG2TMCP,7Fig.7Statisticalresultsofthesizeoftheprecipitation8Fig.8Comparisonofthesizeoftheprecipitationindifferenttechnologies9197:9NG2TMCPTMCP,9Fig.9Comparisonofmaterialstrengthbydifferenttreatmenttechnologies4.4:,RAL,,,,12,1,24UFC,877,,TMCP,,,101()Table1Chemicalcompositionofpipelinesteelspecimens(massfraction)%CSiMnSPAlNbVTiMoCuCrNi0.0470.221.890.0020.0040.040.100.0570.0220.230.220.260.252Table2ProcessparametersandmechanicalpropertiesUFCMPaMPa%-20J191979448255077718.70.71185292484067252563576216.20.83258392486476548062875516.70.83186492587780546057472317.70.7933910Fig.10Microstructuresofpipelinesteel(a)3;(b)24.5:(JFE),013%014%,,,JFE0135%C-0119%Si-0175%Mn,,,[13]11b,;11a,,11Fig.11Microstructuresofmedium2carbonsteel(a);(b)029()30,4.6UFC+DQ+OnlineT(HOP)UFC2DQDQ,OnlineTHOP(heattreatmenton2lineprocess),DQ[14]HOP,2003JFE,20045,415mHOP,,102104kW/m2,100,(12)Super2OLACHOP,,,,,,,6001100MPa12Fig.12Plateproductionlinewithon2lineheattreatmentHOPSuper2OLAC,,,-,,HOP,,JFEX65,X70610MPa,,,,780MPa,-40,,1100MPa,,,-,20,1/,[15]4.7UFC2DL2T:(0.75)Cu,Cr,Ni,Mo590MPa780MPaUFC2DL2T,:,(),,,,,,,,4.8UFC2F:,CCT,UFC2F,,,JFE,Super2OLAC,,[11],,JFESuper2OLAC,1297:,,,,385590MPa,,SM570TMC0102%,780MPa,-404.9UFC2B:CCT,UFC2B,,,,,,,UFC2B,,5NG2TMCP,,,,:[1][M],,:,2002[2]20[J],2001,24(1):1-10(XuKuang2di.The20thcenturyferrousmetallurgyadvancedtowardsengineeringsciencefromskill[J].ShanghaiMetals,2001,24(1):1-10.)[3]TMCP[J],2008,30(2):1-5(WangGuo2dong.ThenewgenerationTMCPwiththekeytechnologyofultrafastcooling[J].ShanghaiMetals,2008,30(2):1-5.)[4]HouyouxC,HermanJC,SimonP,etal.Metallurgicalaspectsofultrafastcoolingonahotstripmill[J].RevuedeMetallurgie,1997,97:58-59.[5]NKKSFukuyama.Super2OLACHintroducedathotstripmillforautomotivesteelsheetproduction[EB/OL].(2002-07-15).http:[6]GladmanT,DulieuD,MclvorID.Structure2propertyrelationshipsinhigh2strengthmicroalloyedsteel[C]ProcofSymponMicroalloying75.NewYork:UnionCarbideCorp,1976:32-55.[7],,TMCP,[C]2009,2009[8],,400MPaC2Mn-[J],2003,38(2):46-50(XuYun2bo,LiuXiang2hua,WangGuo2dong.Predictionofmicrostruc