在轧制过程轧辊磨损热评价的新方法中英文翻译资料 大学大学论文Word格式文档下载.docx

在轧制过程轧辊磨损热评价的新方法中英文翻译资料 大学大学论文Word格式文档下载.docx

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Abstract：

Anewmethodwasdevelopedbyathermalwearmachinetoevaluatethethermalwearofrollsinsteelrollingprocess．Thestee1stripandrollsweresimulatedbyupperand1owerheatingdisks．Theupperheatingdiskcouldbekeptatatemperatureofover900℃byinductionheating．Thepressurebetweenthedisksashighas323.2MPacouldbeachievedandtheslippingratecouldbe12.7．Thethermalwearofhighspeedsteel（HSS）rollmaterial，thewearrateoftheHSSroll，andtheSEMmorphologyofawornHSSrollsurfacewereinvestigated．Thismethodwasusefulandcouldbeemployedtosimulatefrictionandwearbetweenstripandrollduringthestriproilingprocess．

Keywords：

therma1wear；

roll；

friction；

striprolling；

Inductionheating

Therollisoneofthemostimportanttoolsintherollingprocess．Itssurfacemaygetwornoutbecauseoftherelativeslipbetweentherollsurfaceandsteelsforthefastchangesinbothrollingforceandtemperature．Indesigningandcalculatingthewearcrownofrolls，therollwearisaveryimportantfactorandhastobetakenintoconsideration，asitcanreducethedifficultyincontrollingsteelshapeandincreasetheaccuracyinthecalculationmodeloftherollwearcrown．Furthermore，thewearoftherollsurfacewilldirectlyaffectthesurfacequalityofstee1．Therefore，itissignificanttodevelopanapproachmethodtoevaluatetherollwearandtostudythemechanismofrollwearbasedonfrictiontheory．

Todate，manystudieshavebeencarriedoutconcerningrollwear．Forexample，Katodevelopedathermalwearequipment．whichisadiskshapedmachine．However，itisdifficulttosimulatethewearbetweensteelandrollduringtherollingprocess，asthediskissmal1andthin，andtheloadisnotverylarge．GlottalEandLietalE.studiedthethermalwearattributionofwear-resistantmaterials9Cr2and3Cr2W8V，andthethermalwearequipmenttheyusedwasapindiskmachine，whichcouldnotbeusedtosimulatethethermalwearoftherol1．Liaousedasmal1mil1torollthewireandstudiedthethermalwearoftherollwithhighCrcastiron．However，thisequipmentwasamil1andtheworkpiecethatneededtobeheatedandrolledforstudringthefrictionalwear．Thus，forsomeworkpiecesitwasalmostimpossibletostudythewearunderdifferentslippingrateandloadforalongperiod．

Inthispaper,thethermalweartestmethodisdeveloped，whichisadisk-likemachine．Theupperandlowerdisksareusedtosimulatetheworkpieceandtheroll，respectively．Theupperdiskcanbeheatedupto900℃throughaninductioncoil．Theloadcanbeexertedashighas323.2MPabetweendisks，andthemaximumslippageratiois12.7．

1．Principle

Toevaluatethethermalwearofrolls,anewtestmachinewasdeveloped，whichwasdisk-likeonthebasisofthe2-high160mmmill．Thedisk，driveshaft，bearingblock，andforcingequipmentweredesignedandmanufactured。

andtheinductionheatingequipmentwasdesignedwithaspecialshapetoheattheupperdiskwherethetemperaturecouldreachhigherthan900℃．Theupperandlowerdiskscouldbeusedtosimulatetheworkpieceandtherollsduringhotrolling，respectively．Theratiooftheslipbetweendiskscouldbedeterminedbytheforwardslip．Thelowerdiskwithdifferentembeddedmaterialscouldbeemployedtostudythewearoftherollundersomerollingcondition.

Theoriginal2-high160mmmillconsistsofmotor-drivenequipment，areducer，andjunctor．Thedevicestobedesignedaredisk，shaft，bearingblock，forcingequipment，balancingspring，endcap，cushionring，junctionbox，backplate，andsoon．Thehighfrequencyinductionequipmentisdesignedasaspecialheatingmode．

（1）Thedimensionoftheupperdiskis160mm×

30mmandthatofthelowerdiskis160mm×

50mm．Thediskmaterialis45steelandthedimensionoftheexperimentalrollmaterialis10mm×

10mm，whichisembeddedontheperipheryofthe1owerdisk．

（2）Themateria1ofthedriveshaftis40Crsteelwhichishollowforwatercooling．Thebearingblock，theforcingequipment，andthebalancingspringarealsodesigned．

Forthispurpose．TheGP10-C1high-frequencyinductionapparatusisemployed，andtheinductionpowersourceandtheparametersarelistedinTable1．

ThesurfaceoftheinverseupperdiskisheatedbytheGP10-C1inductionpowersourceaccordingtothetheoryofskineffectofelectromagneticinductionheating．Theinductioncoilisspeciallydesignedasasemicircleforacontinuousheatingoftheinverseupperdisk．TheexperimentalsetupfortestingthermalwearincludingtheheaterandwatercoolingsystemofthedisksisschematicallyillustratedinFig．1．TheconductormaterialisT1orT2purecoppertubeandthedimensionis10mm×

1mm.

2Experimental

Totestthevalidityofthemachineperformance．rollmaterialofh