轧辊的磨损优选ppt资料

轧辊(zhágǔn)的磨损第一页，共27页。WEARinHSM

CLASSIFICATIONofWEARABRASIVEWEARADHESIVEWEARFATIGUEWEARCHEMICALWEARICR&DDEPTLOSSofTOOLMATERIALduringDEFORMATIONSKETCHSofMECHANISMS第二页，共27页。WEARinHSM

ABRASIVEWEARICR&DDEPTREMOVALofMATERIALbyHARDASPERITY(2-bodywear)byPARTILESLOCATEDbetween2SURFACES(3-bodywear)MECHANISMAFFECTSbyROLLHARDNESSOXIDESCALECarbon(%)123第三页，共27页。WEARinHSM

ADHESIVEWEARICR&DDEPTJUNCTIONS(MICROWELDING)GENERATEDbyPLASTICDEFORMATIONofASPERITY

SEPARATIONorBREAKINGMAYLEADLOSSofMATERIAL

MECHANISMAFFECTSbyCONTACTCOMPATIBILITYofSURFACES第四页，共27页。WEARinHSM

FATIGUEWEARICR&DDEPTCYCLICALLOADINGMECHANICALmicrocracksdelamination(flatsheet-likeparticledetachment)THERMALcracksfirecrackpatternPITTING,SPALLING…第五页，共27页。WEARinHSM

CHEMICALWEARICR&DDEPTLOSSofMATERIALduetoTRIBOCHEMICALREACTIONSROLLSTRIPLUBRIFICANTENVIRONMENT第六页，共27页。WEARinHSM

ROLLWEARICR&DDEPTCOMPLEXPHENOMENONSEVERALMECHANISMACTINGattheSAMETIME…CORROSIONTHERMALFATIGUEABRASIONMECHANICALFATIGUE第七页，共27页。WEARinHSM

ROLLWEARICR&DDEPTROLLINGPARAMETERS第八页，共27页。WEARinHSM

FACTORSINFLUENCINGROLLWEARICR&DDEPTFRICTIONHOT-ROLLEDSTEELLOADS&STRESSESROLLMATERIALCOOLING&LUBRICATION第九页，共27页。WEARinHSM

HOT-ROLLEDSTEELICR&DDEPTCHEMISTRY&MECHANICALPROPERTIESHAVEaSTRONGEFFECTonWEARDEFORMATIONRESISTANCEWEARTEMPERATURECONTROLSGROWTH&TYPEofOXIDESCALE第十页，共27页。OXIDEFILMSTABILITYROLLINGPRESSURERANGE100-300MPaLOADS&STRESSESROLLINGSPEEDAFFECTSSTRAINHARDENINGWEARSHOWSaMAXIMUMat900-950°CROLLINGPRESSURERANGE100-300MPainROLLINGSPEEDCOOLING&LUBRICATIONCONTROLLINGSTRIPTEMEPERATURECONTROLLINGSTRIPTEMEPERATUREADHESIVEWEARCLASSIFICATIONofWEARJUNCTIONS(MICROWELDING)第二十四页，共27页。WEARinHSMNONUNIFORMWEARWEARinHSM

HOT-ROLLEDSTEELTERTIARYSCALEinFINISHINGGROUPICR&DDEPTCONTROLLINGSTRIPTEMEPERATUREbelow950°CIMPROVESROLLPERFORMANCEFeOACTSASALUBRIFICANTTHERMALFATIGUEOXIDEFILMSTABILITYonROLLSURFACE第十一页，共27页。WEARinHSM

ICR&DDEPTbutanothertheoryexistsalsoLOOKEDinLABORATORYTESTSWEARSHOWSaMAXIMUMat900-950°CAbove950°CSCALESHEARSINTERNALLY:WEAR&FRICTIONDECREASEBelow950°CWEARINCREASEwithTEMPERATURE:ROLLSOFTENING&HARDERSCALEHOT-ROLLEDSTEELTERTIARYSCALEinFINISHINGGROUP第十二页，共27页。WEARinHSM

LOADS&STRESSESICR&DDEPTWEARRATEisDIRECTLYPROPORTIONALtoNORMALPRESSUREonROLLSURFACEROLLINGPRESSURERANGE100-300MPaCYCLICSTRESSES(alsoTHERMAL)

±500MPaIRREGULARPRESSUREDISTRIBUTIONNONUNIFORMWEAR第十三页，共27页。WEARinHSM

FRICTIONICR&DDEPTNEEDFULtoROLLING

ESTABILISHtheROLLINGPOWERCONSUMPTIONIMPORTANTforSTRIPSURFACEQUALITY

REDUCTIONTEMPERATUREROLLINGSPEEDmROUGHNESS第十四页，共27页。WEARinHSM

FRICTION&REDUCTIONICR&DDEPTTHEREISaSLIGHTDIRECTCONNECTIONSURFACECONDITIONINFLUENCETHISRELATIONSHIPFRICTION&ROLLINGSPEEDGENERALLYmDECREASESwithanINCREASEinROLLINGSPEEDbutROLLINGSPEEDAFFECTSSTRAINHARDENINGofSTEELALSO第十五页，共27页。WEARinHSM

FRICTION&TEMPERATUREICR&DDEPTTHEREARERESULTSinDISAGREEMENTT[°C]aT[°C]bf[T]a-Speed=3m/sb-Speed=0.5m/sOXIDESCALEPLAYSAROLEVERYIMPORTANT第十六页，共27页。WEARinHSM

FRICTION&ROUGHNESSICR&DDEPT

mINCREASEwithROLLROUGHNESSFRICTIONISCORRELATEDtoDEFORMATIONWORKGENERATEDinASPERITYSMOOTHING第十七页，共27页。WEARinHSM

FRICTION&ROLLMATERIALSICR&DDEPTCARBIDESAMOUNTCARBIDESTYPEHARDNESSmCARBIDESSHAPE第十八页，共27页。WEARinHSM

FRICTION&ROLLMATERIALSICR&DDEPT

mDECREASESastheTOTALCARBIDEFRACTIONINCREASESMCCARBIDESMAYLEADHIGHERFRICTIONCOEFFICIENT(SPIKEEFFECT)第十九页，共27页。WEARinHSM

FRICTION&ROLLMATERIALSICR&DDEPTHSS–HCrIoftheseMATERIALSDIFFERGenarallyHSSshowsafrictionupto30%higherbut…第二十页，共27页。WEARinHSM

FRICTION&ROLLMATERIALSICR&DDEPT…thewaytoreducemofHSSexists50mmLowamountofMCCarbides10-11%ofCarbidesmainlyM2CMICROSTRUCTUREofLOWFRICTIONHSS第二十一页，共27页。WEARinHSM

FRICTION&ROLLMATERIALSICR&DDEPTLABORATORYRESULTS0.40-0.46第二十二页，共27页。WEARinHSM

COOLING&LUBRICATIONICR&DDEPTCOOLINGCONNECTEDwithTHERMALFATIGUEDAMAGESLUBRICATIONCONNECTEDwithaLOWERINGinFRICTIONForbothsystemsEFFICIENCY&WORKINGREGULARITYGIVEaLONGERROLLLIFE第二十三页，共27页。WEARinHSM

ROLLMATERIALSICR&DDEPTGOODWEARRESISTANCEHIGHHARDNESS(CARBIDES&MATRIX)LOWFRICTIONLOWSURFACEROUGHNESSLOWCRACKI