热轧铸造高速钢工作辊表面氧化膜研究

200611,1,1,2,2(1.,201900;2.,110004):,,SEMXRD,,:;;;;:TG142.45:B:1008-0716(2006)01-0038-05ResearchonSurfaceOxideFilmofHSSCastRollsinHotStripMillSunDale1,FanQun1,YaoLisong1,ZhouLi2,LiuChangsheng2(1.BaoshanIron&SteelCo.,Ltd.,Shanghai201900;2.NortheasternUniversity,Shenyang110004,China)Abstract:Theappearanceandmajorfailurecharacteristicsofthesurfaceoxidefilmofhighspeedsteel(HSS)castrollsinhotstripmillareinvestigated,andeffectoftheoxidefilmfailureonroughnessandabrasionstateoftherollsurfaceisanalyzed.TheoxidationprocessofHSSisstudiedbasedonrollspecimenscontinuousdynamicheatoxidationexperiment,constanttemperatureoxidationexperimentandmoistheatoxidationexperiment.Variationrulesoftheoxidefilmsgrowthmechanism,distributionstateandcombinationformareanalyzedwithSEMandXRD.Waysofimprovingworkroll’swater2coolingeffectarealsoadvanced,whichhaslaidafoundationforcontrollingtheoxidefilmstateandamelioratingstripscross2sectionquality.Keywords:hotrolling;workroll;highspeedsteel(HSS);oxidefilm;cooling0,,,,,3,,,,VMoCrNbW,C,VMo,1965199526643663MCM2CM6CM7C3,,,,,,,,[1-6]V,,83©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(online)andhotrollsshape(offline)abnormaloxidefilm24%6%VMoCr,7,8XRDXRD:M8C77Fig.7MetallurgicalstructureoftheHSSroll8XRDFig.8XRDpatternoftheHSSstructureM7C3;M8C7V,M7C3CrMo;M8C7,M7C3;10%15%,,,,V9500800,500600,600750,7509Fig.9OxidationcurveofHSSatvariabletemperatures10575650575Cr,650,10Fig.10OxidationcurvesofHSSatconstanttemperature1114575650SEMM8C7,CrM7C3575,,1m,,650,M8C7,M7C3,,04©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(17),,Peeling,(18),,,4(1),,,,(2),,57565017Fig.17Comparisonoftemperaturedistributionontherollsurfacebeforeandafterimprovement18Fig.18Coolingwatervolumedistributionbeforeandafterimprovement(3),[1]TsujimotoY.HighPerformanceHighSpeedSteelRollwithFineMicrostructureforResistancetoSurfaceDeterioration[J].CAMP-ISIJ,2002,(l15):994.[2]KeenChulHuangl.EffectsofElementsonMicrostructureandFracturePropertiesofCastHighSpeedSteelRolls[J].Materi2alsScienceandEngineering,1998,A254:282-304.[3]GonzalazV.ModelingOxidationofHotRollingWorkRolls[J].IronmakingandSteelmaking,2001,(6):470-473.[4]MolinariA.OxidationBehaviourofLedeburiticSteelsforHotRolls[J].MaterialsScienceandEngineering,2000,A280:255-262.(55)24©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1),,();,,API(HRC37/HV347)(2),(3),,,55.12003127mm9.19mmS135,3111S135Table1StatisticaldataonweldseamsmechanicalpropertiesofBaosteelS135drillpipes/MPa/MPaCpk/J/JCpk85833.91.321068.63.18:(1)SY/T64071999:2,S135724MPa,24J;(2)Cpk,1.0,1.3,Cpk=()/(3)[2]5.2(1)S135,3.0,(2),,,(3),S1351.3,6(1),,(2),,(3),(4),,,(5)S135,,,3.0(6),S135[1]APISPEC7.1997:9-14.[2].()[M].:,2002:342-345.(:2004-12-30)(:2005-10-26)(42)[5]LiCS.BlackOxideLayerFormationandBandinginHighChromiumRolls[J].MaterialsScienceandTechnology,2000,(5):501-505.[6].HSSÍ-Ë[J].,1997,(6):37-42.(:2004-12-22)(:2005-10-26)55©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.