热带轧机轧辊表面氧化膜疲劳脱落的有限元分析

:2001212207:(59904003):(1964-),,,,;(1953-),,,,;(1945-),,,,20029239()JournalofNortheasternUniversity(NaturalScience)Sep.2002Vol123,No.9:100523026(2002)09208622041,1,1,2(1.,110004;2.(),201900):,,ANSYS,,X,Y,XXY,:;;;;;:TG331:A,,,,,,[1,2],,[37],[8,9],ANSYS,,,11.1:,;;;1,PLANE42,408,467Y,X,4,X,1©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:;;X,Y22Fig.2Loadanddisplacementonthemodel1.3,,(1)2050mmF226199mm16172mm,0,min=-257MPa(2),[10]0,min=-605MPa(3)[10],max=-250MPa,max=1412MPa1.4,331;2;33121:1,Sy11=0MPa,2,Sy12=-257MPa;2:1,Sy21=0MPa,2,Sy22=-605MPa;3:1,Sx31=1412MPa,2,Sx32=-250MPa;123,N5000,100002000022.11125,5000,1000020000XSxYSySxy331Fig.3Thefatiguestressinposition1(a)X;(b)Y;(c)XY3a3b,XY14263689:©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(a)X;(b)Y;(c)XY4,N,SxSy,5000Sxy=819893MPa,Sxy=-819818MPa;10000Sxy=191312MPa,Sxy=-191306MPa;20000Sxy=147146MPa,Sxy=-147146MPa,,,X,,,YX,3(1)(2)50001000020000,X91191MPa10710MPa32812MPaY,XXY,(3):[1]WerquinJC,CailaudJC.Rollforthemetalworkingindustries[M].Pittsburgh:IronandSteelSociety,1990.12-189.[2]HisashiHIRAOKA.Applicationofahighchromiumsteeltoroughingworkrollsforhotstripmills[J].ISIJInternational,1992,32(11):1177-1183.[3],,,[J],1997,32(11):32-35(HuangCQ,ZhaoK,FangMQ,etal.Themechanismandcontrolofscaleinhotstriprolling[J].IronSteel,1997,32(11):32-35.)[4]HSSÍ-Ë[J],1997,83(6):37(HwangKeunchul.Formationandfallingmechanismofblackoxidelayersinhighspeedsteelrollsduringhotstriprolling[J].TETSU2TO2HAGANE,1997,83(6):37.)[5]Yoshikazu.Characteristicsofhigh2carbonhighspeedsteelrollsforhotstripmill[J].ISIJInternational,1992,32(11):1194-1201.[6]OsamuKATO.Mechanismsofsurfacedeteriorationofrollforhotstriprolling[J].ISIJInternational,1992,32(11):1216-1220.[7]PetersonCE.Causeandpreventionofhotstripworkrollbanding[J].IronandSteelEng,1956,33(12):98-101.[8]LiCS,XuJZ,HeXM,etal.Blackoxidelayersformationandbandinginhighchromiumrolls[J].MaterialScienceandTechnology,2000,16(5):501-505.[9]LiCS,XuJZ,HeXM,etal.Formationandcontrolfor468()23©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[J].MaterialsProcessingTechnology,2001,116(2-3):201-204.[10][D]:,2001(LiCS.Investigationoncharacteristicsofrollssurfaceinhotstripmill[D].Shenyang:NortheasternUniversity,2001.)FiniteElementAnalysisofFatigueDeteriorationattheBlackOxideLayersonRollSurfaceLIChang2sheng1,LIUXiang2hua1,WANGGuo2dong1,YANGGuang2(1.TheStateKeyLaboratoryofRollingandAutomation,NortheasternUniversity,Shenyang110004,China;2.ShanghaiBaosteelGroupCo.,Shanghai201900,China.Correspondent:LIChang2sheng,associateprofessor,E2mail:[e-mail])Abstract:ThefatiguedeteriorationofblackoxidelayeronrollsurfacewasanalyzedbyANSYSFEMsoftwareusingthedataofcontactstressbetweenworkrollandbackuproll,andthethermalstressoftheworkrollduringhotstriprolling.Itisshownthatwiththeincreasingofloadcycle,thefatiguestressinXdirectionnearrollmicrocrackisincreased.ThestresswillresultinfatiguecracknucleationnearthemicrocrackoftherollsurfaceinYdirection.Intheinterfacebetweenblackoxidelayerandrollmatrix,fatiguecrackinXdirectionisgraduallyformedwithincreasingoftheshearstress.ThepropagationofthecracksresultsinthecoalescenceofthembothinXdirectionandYdirection.Then,apieceofblackoxidelayermaybefalledofffromtherollsurfaceduringhotstriprolling.Keywords:hotstripmill;roll;blackoxidelayer;fatiguecrack;oxidelayerdeterioration;FEM(ReceivedDecember7,2001),,,:,,,,,,,,,,,,,5689:©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.