硼微合金化对CSP生产低碳铝镇静钢带性能的影响

16720067ChinaMetallurgyVol.16,No.7July2006:(19652),,,;E2mail:[e-mail];:2006204213CSP1,2,2,1(1.,243000;2.,100081):,BN,,CSP,w(B)=(1050)10-6:;;SPHC;:TG142.1:A:100629356(2006)0720027205EffectofBoronMicroalloyingonMechanicalPropertiesofLowCarbonAlkilledSteelStripProducedinCSPRouteWANGXiao2yan1,XIAOLi2jun2,QIUSheng2tao2,WUWen2lin1(1.TechnologyCenterofMaanshanIronandSteelCo.,Ltd.,Maanshan243000,Anhui,China;2.CentralIronandSteelResearchInstitute,Beijing100081,China)Abstract:Bylaboratoryresearchandmechanismanalysis,itisfoundthatthereductionoffreeN,resultingfromgraincoarseningandBNformationduetoaustenitegrainboundaryconentrationofboronandcoarseprecipitates,isthemainreasonfordecreasingyieldstrengthofthissteel.Basedontheresults,industrialtestwascarriedoutinCSPproductionlineofMagang.Resultsshowthattheyieldstrengthofhotrollingstripwith(1050)10-6bo2ronsuffersasignificantloss.Keywords:boronmicroalloying;thinslab;continuouscastingandrolling;SPHC;mechanicalproperty,,NUCOR-CORUSIJmuiden,,,,,,(ReL),CSP,SPHC11CSP,30kg90mm50mm300mm,12,,ReL;1Fig.1Processflowoflabexperiment©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(C)w(Si)w(Mn)w(P)w(S)w(Als)w(B)0.070.070.050.050.150.300.150.300.020.020.010.010.020.050.020.050.0010.005-2Table2ComparisonofmechanicalpropertiesbetweenB2bearingandB2freesteelsReL/MPaRm/MPaA/%//mm23132137.5782.1532542535.89102.152Fig.2ComparisonofopticalmicrostructuresofB2bearingandB2freehotstrips78,910,,25m90%,222.1120t2LF2CSP,SPHCSPHC,LF3:ReL,w(B)(1050)10-6SPHC,,w(T.O)3010-6w(N)6010-62.22.2.1,,3,2.2.2,48h4,ReL19MPa,Rm21MPa;48h,ReL29MPa,Rm9MPa;19,ReL13MPa,Rm7MPaReL3SPHCTable3ChemicalcompositionofB2bearingSPHCsteel%w(C)w(Si)w(Mn)w(P)w(S)w(Als)0.0280.0500.0150.0580.160.220.0040.0140.0020.0120.0240.0510.0380.0320.190.0090.00690.0348216©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(B)4,w(B)=(2535)10-6ReL4ReLw(B)Fig.4RelationshipbetweenyieldstrengthandBcontentofhotrollingcoilafteraging2.2.35(a),78,23.3m,(5(b))910,13.8m,,2.2.45,5SPHCFig.5MetallographcomparisonbetweenB2bearingandB2freestripsinindustrialexperiment5Table5InclusionlevelevaluationofB2bearingsteel/0.501.00000.500.501.50.5001.00.50.501.51.0001.002.2.5,:(1.87.6m)(6),,,,,,(7),,,CSP1100,927:CSP©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(B)=(2535)10-6r2.2.8,9,,,;,,B/N,3ReLReL,ReL,Hall-PetchReL=121.74+5000Nfree+18.37/da1/2MPa[1]/ReL,,SPHC,,SPHCReL3.1,w(B)=0.003%,1280,9800316©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[2],N.Takahashi[3]w(B)=0.003%,1000,1min,50%,,100min30%,Gladman[4]2,,,3.2Masatoshisudo[5],,,(515)10-6w(B),,,[6],Ar3(1):Ar3=910-730[C]-73[Mn]-16000[B](1)(1),Ar3,Ar3,w(B)3010-6Ar33040,3.3Hall2PetchReL,ReL,2010-6ReL10MPa,ReL2Fe[7]:BN=B+NLog[B][N]=-13970/T+5.24(2)AlN=Al+NLog[Al][N]=-6770/T+1.03(3),,,,ReL4(1),CSPSPHCw(B)=(1050)10-6,,ReL,,,CSP(2),,,;,ReL,,ReL(3),(44)137:CSP©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(Cu)/%/mm/%/%A01.00-43400.20.347B0.221.141.486151758C0.161.111.1750.30.2685,,,,,:[1],,,.[P].:32090518,1991204216.[2],,,.[P].:32115527,1991205216.[3],,.[P].:42157118,1992205229.[4],.[P].:42304315,1992210227.[5],,,.[P].:52140650,1993206208.(31):[1]ChoquetP,FebregueJ,GiustiB,Chamont,JN.PezantandF.Blanchet,ModelingofForce,StructureandFinalPropertiesDuringTheHotRollingProcessontheHotStripRollingMill[J].Intl.Symp.OnMathematicalModelingofHotRollingofSteel,1990,Canada:33244.[2]SmithellesCJ.MetalReferenceBook[M].Butterworths:1967.[3]TakahashiNT,ShibataM.Proc.onTechnologyofContinu2ousAnnealedCold2RolledSheetSteel[J].TMS2AIME,War2rendale,PA,1984,133.[4]ManoharPA.FiveDecadesoftheZenerEquation[J].ISIJIn2ternational,1998,38.[5]SudoM,TsukataniI:Conf.Proc.onTechnologyofContinu2ousAnnealedCold2RolledSheetSteel[J].TMS2AIME,War2rendale,PA,1984,203.[6],,,.[J].R.D,1990,36(3):61264.[7]R.W.,.[M].:,1999.4416©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.