简介：ThispaperintroducesACvariable-speeddrivingcontroltechnologyapplicationinthecontinuousannealingline,includingthedrivesystemconfiguration,thedrivingcontrolcharacteristicsofCALandthemaincontrolfunctionsofthedrivesystem.Firstlyintroducesthemainprocessofthecontinuousannealingline,thefeaturesofthe6SE70seriescommonDCbusdrivesystemandtheG150seriesdrivesystem.Secondly,forthecontinuousannealingline,therearemorestrictrequirementsforthecontinuityofproductionandmorespecialrequirementsforthedrivecontrolcharacteristics.Wedoalotofimprovementandstandardizationforthedrivingcontrolfunctionsandtheinterfacesofthelineautomationcontrolsystem.Thispaperdiscussesthecommunicationinterfacespecificationsandthedimensiontransformationmethodsbetweenthedriveandthebasicautomationsystem.Thedetaildimensiontransformationmethodsandcalculationmethodaboutthelinespeedsettingandtheactualrollerdimensionsettingaregiven,anddetaildescriptionforthecalculationmethodofthereferencespeedinthedrive.Articlealsoemphasizedillustratesrealizingandtestingmethodsofinertiacompensationofequipmentinthedrives,andstandardizethevalueoflineaccelerateanddeceleraterate,andtheinertiatestmethodandinertiacompensationcoefficientcalculationmethodisintroducedinthispaper.Forthebridgerollersandfurnacehelprollersloadbalancecontrol,thispaperpresentstwodifferentloadbalancecontrolstrategies,theloadbalancecontrolprincipleforbridgerollerswhichdatacommunicatesfrommainstationtoslavestationsbySimolink,andtheloadbalancecontrolprincipleforfurnacehelprollerswhichusedroopcontrol.Thedifferentcharacteristicsofthosetwomethodsarestatedindetail.

简介：Incontinuousannealinglines/hotgalvanizing,stripsareguidedbyupperandlowerrollsinanalternateupanddownverticalmotion.Thiskindofprocessconsistingofheating,soaking,andcoolingfurnaces（orzones）hasseveraladvantagesintermsofproductivityandproductquality.Mainproblemsencounteredincontinuousannealinglinesaremisguidingandformationofbuckling.Thestripbucklingcausesthestriptoberejectedand,intheworstcase,thestripbreaksandthecontinuousannealinglinesarecompelledtostop.Inthispapertheelastic-plasticmodelofthestriptravelingandthecorrespondingboundaryconditionwereconstructeddependantonthetheoryofmechanic.Simulationsareperformedintwosteps.First,ahomogeneouslongitudinaltensilestressisappliedatoneendofthestrip,theotherendofthestripandtherollarerestricted.Inthesecondstep,theappliedtensionremainsconstant.Auniformdisplacementisappliedtotheotherendofthestripandarotationtotheroll.Thetransversecompressivestress,thebucklingformationduringstriptravelingprocess,thelocationforthebucklingtakingplaceandthebucklingcriterionwereinvestigatedsystematically.Theresultshowsthatthetransversecompressivestressincreaseswiththeincreaseofthetensilestressandthecrownofthetaperedroll.Becausethecontactareabetweenthetaperedrollandthestripincreasewiththedecreaseofthecrown,thetensilestressdistributionismorehomogeneousinthetransversedirectionofthestrip.Anadditionaltransversecompressivestressiscreatedandabucklingisalsoobservedduetothefrictionduringthestripmotioninthesecondstep.Oncethebucklingisappearance,itisveryhardtoberemovedonlythroughdecreasingtheappliedlongitudinaltension,becausethestripwrinklestillkeepshighlevelduetotheeffectofthebuckledstrip,thewrinklewouldevolveintobucklingeventually.Thebucklingformationprocesspredictedbythefiniteelementmodelisverysimilartothose

简介：Anincreasingnumberofannealingfurnaceshaverecentlybeenusingcheaperandcleanernaturalgas(NG)insteadofliquefiedpetroleumgas(LPG)asfuelgas.However,thefuelgasofthefurnacesoftenneedstobechangedwhenNGsupplyisnotadequateorwhenLPGbecomescheaper.Usually,changingthefuelgasinvolveschangingvariousequipmentaswellascontrolparametersforinstrumentsandthecontrolsystemandhenceistimeconsuming.Therefore,itisimportanttodevelopaquickprocessforchangingfuelgas.Thisstudydiscussesthetechniquesforquicklychangingfuelgasinanannealingfurnace.Thesetechniquesdealwiththedesignofthepipe,valveandburner,theselectionoftheflowmeterandtheflowcontrolvalve,theswitchofthesoftwareandparametersforthecontrolsystem,aswellastheoperation,commissioningandhottestofthefurnacewhenthefuelgasischanged.Usingthesetechniques,itispossibletochangefuelgasin6h.

简介：Someofthemaincoolingprocessesandequipmentthatarecurrentlybeingusedinthecontinuousannealingprocessline(CAPL)atBaosteelareintroduced,aswellastheircoolingcontrolmodeltechniques,themodelingprincipiumandtheirapplicationresults.Withchartsindicatingthecontroltrendsinrealprocesses,thepowerfuladjustingabilityofthecontrolmodelswithprocessvariabledifferencesandtheirexcellentcontrolprecisionareshowninthisstudy.

简介：Theeffectofannealingtreatmentonthemicrostructuresandmechanicalpropertiesofcold-sprayedNicoatingwasinvestigatedbyconductingmicro-hardnessandtensiletestsandusinganormalopticalmicroscope(OM),ascanningelectronmicroscope(SEM),atransmissionelectronmicroscope(TEM)andanelectronprobeX-raymicroanalyzer(EPMA).Theresultsshowthatfollowingtheincreaseoftheannealingtemperature,themicro-hardnessofcold-sprayedNicoatingdecreasesandtheelongationafterfractureincreases,whilethetensilestrengthincreasesbeforedecreasing.Thetensiledeformationandfracturebehaviorchangefromatypicalbrittlefracturetoahybridbrittleandductilefracture,thentoatypicalductilefailure.Itisfoundthatwhenannealedatanelevatedtemperature(e.g.900℃),thegrainstendtogrowabnormallywiththeoxidesspheroidizingandthedefectsagglomeratingattheinterfaces,causingthetensilestrengthreductionofthecold-sprayednickelcoating.Itisalsopointedoutthatthetensilestrengthofthecold-sprayedNicoatingcanbesignificantlyimprovedbytheappropriateannealingprocedures,buttheelongationafterfracturecannotbeclearlyincreasedbecauseitisdifficulttoeliminatethemaindefectsinthecoatingbythefollowingheattreatments.

简介：Cold-rolledmartensiticsteelsheetsproducedoncontinuousannealinglineswithwaterquenchingfacility,haveadvantagesofhighstrengthandlowalloyingelementcontents.Theseareingoodaccordancewiththetrendoflight-weightingandfuelsavingforautomotivesteel.Inthisarticle,acold-rolledmartensiticsteelisstudiedtoinvestigatetheeffectofannealingparametersonitsmechanicalproperties.Itisfoundthatthequenchingtemperatureandtheslowcoolingspeedaswellastheoverageingtempe...

简介：Aseriesofnanocompositethinfilms,composedofNd2Fe14Bandα-Fe,hasbeenpreparedbyDC-magnetronsputteringcombinedionbeamsputteringontoSi(100)substrates.Theeffectsofpostannealingonthemicrostructureandmagneticpropertiesof[NdFeB/α-Fe/NdFeB]-typethinfilmshavebeeninvestigated.TheX-raydiffraction(XRD)studyshowedthatannealingofthefilmsfor30minattemperatures550,600,650,700℃resultedintheappearanceofdiffractionpeaks,characteristicforNd2Fe14Btetragonalstructure,α-FeandNd2O3phases.TheinvestigationusingtheVibratingSampleMagnetometer(VSM)withamaximumappliedfieldof2Tindicatedthatwiththeincreaseoftheannealingtemperature,themagneticpropertiesofthemultilayerfilmswereimprovedandreachedpeakvalueat650℃(Hci=41.72kA·m-1,Mr/Ms=0.4,(BH)max=30.35kJ·m-3),afterwhichthemagneticpropertiesweredecreasedgreatly.Alongwiththeincreaseofthethicknessofα-FelayerfromTα-Fe>16nm,thecoercivityHci,saturationmagnetizationMs,andremanenceratioMr/Msalldeclined.AstheAtomicForceMicroscope(AFM)indicated,afterbeingannealedat650℃for30min,thesamplewasshowedfinesurfacemorphologywithgrainsize60nm≤dα-Fe≤80nmand100nm≤dNdFeB≤150nm.

简介：Recrystallizationtextureofsteelplateisaffectedbysubstitutionsolidsolutionandinterstitialsolidsolution.Thisarticlefinishedtexturetestandstampingtestaboutlowcarbonaluminiumkilledsteel,IFsteel,phosphorusstrengthensteel,Si-Mn-Pstrengthensteel.Itcanbefoundthatallkindsofsteelhassimilarintensity{111}textureinpermanentφ=45°aboutlevel10.Interstitialsolidsolutionsteelhad{101}textureandsubstitutionsolidsolutionsteelhad{112}texture.Basedonrecysstallizationprincipleandstampingtest,theeffectofsolutiononrecrystallizationtextureisdiscussed.Itpointoutthatinterstitialsolidsolutionimpediment{111}textureformingandcausedto{101}textureremainedinsteel.Thephenomenonstrengthenanisotropicpropertyandreductionstampingproperty.Similartosubstitutionsolidsolution,itwouldimpediment{111}texturetoo,but{101}texturechangedto{112}texture.

简介：Superduplexstainlesssteels(SDSS)showcomplexprecipitationandtransformationbehaviorduringheattreatmentprocesses,whichaffectsbothmechanicalandcorrosionproperties.ThisreportpresentssomedataonthemicrostructuresthatdevelopafterfoldingandsubsequentprecipitationduringheattreatmentofUNSS32750SDSSsheetsamples.ThemicrostructuralandtexturalchangeshavebeenfollowedusingSEM/EBSDtechniques.Uponfolding,bothatextureandstraingradientforminthefolded/bentregion,subsequentheattreatmentat845℃resultsintheferritephasetotransformtosigma,austeniteandchiphases.Transformationwasfoundtobeacceleratedbystrain.Completetransformationoftheferritephaseoccurredwithinhalftheannealingtimerequiredintheunstrainedregions.Thelocalmis-orientationsintheferriteandaustenitephasesreducedduringannealing,however,thereductionintheaustenitewasnotveryhighandasignificantamountremainedevenafterthelongestannealingtime.Thetexturecomponentsthatdevelopedduringthefoldingprocessremainedunchangedevenafteronehourannealingat845℃.TheimplicationofthesefindingscouldhaveabearingontheformationofsigmaphaseduringweldingofSDSSthatmayhaveresidualstressesintroducedduringfinalprocessing.

简介：Inthisstudy,threekindsofdual-phase(DP)steelswereusedtoinvestigatetheinfluenceofsiliconcontentandintereriticalannealingtemperatureontheirmicrostructures,mechanicalproperties,andwork-hardeningbehaviors.Byaddingsiliconandmatchingthecriticalannealingtemperature,anewDPsteel(1.0Siandintercriticallyannealedat790℃)thatexhibitsanexcellentcombinationofultrahighstrengthandadequateductilitywasobtained.Variationsinthestrength,elongation,andfracturemechanismofthespecimenswithrespecttodifferentintercriticalannealingtemperatureswerecorrelatedtomicrostructuralfeatures.Withanincreaseinthesiliconcontent,thereisnosignificantchangeinthemartensiticbandstructureorferritemorphology.Atthesameannealingtemperature,theyieldstrengthandyieldstrengthratioofthespecimensdecreased,butatdifferentannealingtemperatures,thetensilestrengthwasreduced.TheHollomonanalysisresultsindicatethattheworkhardeningbehaviorobeysatwo-stagework-hardeningmechanism.Withanincreasingintercriticalannealingtemperature,the"transitionstrain"shiftstotheleft,andwithanincreasingsiliconcontent,the"transitionstrain"shiftstotheright.Thesurfaceexhibitsductilefracturescharacterizedbyahighdensityofmicrovoiddimples.Withanincreaseinthesiliconcontent,theaveragedimplesizeonthefracturesurfacedecreasesandtheplasticityofthematerialincreases.

简介：(Cu60Zr30Ti10)98Y2bulkmetallicglass(Φ4mm×70mm)wasobtainedsuccessfullybycoppermouldcoolingandspraying-casting,andsomesampleswereisothermallyannealedattemperaturesof473and623K,whichwaslowerthantheglasstransitiontemperature(Tg)for1h.Microstructureandpropertiesofas-castandannealedsampleswerestudied.Crystallizationphases(Cu10Zr7andCuZr)wereobservedinannealedsamples,andthespeciesandfractionofthesephasesincreasedwithincreasingannealingtemperature.Mic...