简介:BaosteelTechnicalResearch,aquarterlyjournal,whichisissueddomesticallyandabroad,isrunandsponsoredbyBaosteelGroupCorporation.BaosteelTechnicalResearchmainlyreportstheachievementsintechnologicalinnovation,academicresearch,newproductdevelopmentandindustrialequipmentimprovementbyBaosteel.Itwillcontinuetofollowuponhottopicsandservethecompany'stechnologicaldevelopmentand
简介:Owingtothedevelopmentofnewproductsandhigherrequirementofproductproperties,thecurrentexistinginductionheatingtechnologyofBaosteelcannolongersatisfythenewrequirementsoftheproductline.Controloftheinductionheatingtemperaturetoanappropriatevalueisakeyconsiderationininductionheatingtechnology.Toobtainacculturatedtemperatures,investigationswerefocusedontheparametersofaninductionheatingsystem,includingthoseofinductionheatingequipmentandheatingprocesses.Intheseinvestigations,computersimulationwasusedtomodeltheinductionheatingprocess,followedbyphysicalexperimentationtoverifyandimprovethesimulationmodel;finally,optimizedinductionheatingparametersweresuggested.Theuseofcomputersimulationsdramaticallydecreasedphysicalexperimentaltimes,andthecomputedheatingparameterswereusedtoguidethephysicalexperimentationanddesignoftheproductline;thisincreasedtheefficiencyofsubsequentinvestigations.ThisstudyfocusesonthedevelopmentofinductionheatingtechnologyinBaosteel,whichincludestheoverallinductionheatingtechnologyusedinmanufacturingbackuprollersandinthethermomechanicalcontrolprocess.
简介:BaosteelTechnicalResearch,aquarterlyjournal,whichisissueddomesticallyandabroad,isrunandsponsoredbyBaosteelGroupCorporation.BaosteelTechnicalResearchmainlyreportstheachievementsintechnologicalinnovation,academicresearch,newproductdevelopmentandindustrialequipmentimprovementbyBaosteel.
简介:BaosteelTechnicalResearch,aquarterlyjournal,whichisissueddomesticallyandabroad,isrunandsponsoredbyBaosteelGroupCorporation.BaosteelTechnicalResearchmainlyreportstheachievementsintechnologicalinnovation,academicresearch,newproductdevelopmentandindustrialequipmentimprovementbyBaosteel.Itwillcontinuetofollowup
简介:BaosteelTechnicalResearch,aquarterlyjournal,whichisissueddomesticallyandabroad,isrunandsponsoredbyBaosteelGroupCorporation.BaosteelTechnicalResearchmainlyreportstheachievementsintechnologicalinnovation,academicresearch,newproductdevelopmentandindustrialequipmentimprovementbyBaosteel.Itwillcontinuetofollowuponhottopicsandservethecompany'stechnologicaldevelopmentandprogress.Itsreadersincludeexpertsinsteelmetallurgyandrelatedfields,technicians,managementstaff,professorsandstudentsinuniversitiesandcolleges.It
简介:BaosteelTechnicalResearch,aquarterlyjournal,whichisissueddomesticallyandabroad,isrunandsponsoredbyBaosteelGroupCorporation.BaosteelTechnicalResearchmainlyreportstheachievementsintechnologicalinnovation,academicresearch,newproductdevelopmentandindustrialequipmentimprovementbyBaosteel.
简介:HitachiInformationSystemsstarteduptheRFIDbusinessfrom2002andprovidesvarietiessolutions,especiallydevotedtheenergiesontheresearchofmetallictagandthedevelopmentofitsappliedarea.Themetallictagwasdevelopedtowithstandtheharshenvironmentlikevibration,shock,high-pressurewaterinjection,highvoltage,andultravioletirradiation.Becausethemetallictagthatdifferentwiththemetaltagcreatedbefore,isprotectedbythemetallicmaterialthatmadeitverystrongtobeusedintheenvironmentlistedabove.June,2006,ourcompanysuccessfullydevelopedthemetallictagwitharmor-cladstainlesssteel.Therefore,comparingwiththeresintag,themetallictagwithremarkablemechanicalstrengthwassufficientattentiontowithstandtheoutdooruse,eventoresistUV.Bythemethodofscrewfixing,rivettightening,solderingornailstriking,theinstallationprocedurecanbecompleted.Becausethevariousinstallationmethodsweresupported,themetallictagcanbeappliedtomanyindustryareas.Themanagementmarketslikeconstructionmachinery,substationequipment,molds,tools,andmetalliccontainerthatneedtheverystrongtagcanbedeveloped,becauseofthemetallictag.Inthisthesis,itwillbedescribedabouttheresearchbackgroundandtheresearchresultsofmetallictag,thecommercializedmetallictag’sfeaturesandapplicationfields,aswellastheresearchsubjectsinthefutureandrecentdevelopmentsituation.
简介:Basedontheprincipleofsimilarity,waterwasusedtosimulatetheflowofmoltensteeltoanalyzetheflowfieldinatundish.Severalschemesofthetundish’stracershapeweredesignedandcorrespondingwatermodelexperimentswereconducted.Duringtheexperiments,acomputerautomaticallycollecteddata.Thecomparisonoftheresidencetimedistribution(RTD)curvesdrawnaccordingtothecomputer-collecteddataoptimizedtheschemeandphotographsoriginatedfromtheexperimentswithinkasitstracer.Itindicatesthatthewatermodelcanoptimizetheflowfieldofthetundish.
简介:BaosteelTechnicalResearch,aquarterlyjournal,whichisissueddomesticallyandabroad,isrunandsponsoredbyBaosteelGroupCorporation.BaosteelTechnicalResearchmainlyreportstheachievementsintechnologicalinnovation,academicresearch,newproductdevelopmentandindustrialequipmentimprovementbyBaosteel.Itwillcontinuetofollowuponhottopicsandservethecompany’stechnologicaldevelopmentandprogress.Itsreadersincludeexpertsin
简介:Hot-tearingcracksusuallyformnearthesolidustemperature.Itiscausedbyacombinationoftensilestressandmetallurgicalembrittlement.Inordertoquantifyembrittlementandtoincorporateitinthethermal-stressanalysis,manydifferentcriteriahavebeendeveloped.Amongthem,thesubmergedsplit-chilltensile(SSCT)testisanefficientone.ThispapertriestouseSSCTtoestimatethecriticalstrainofhottearingforsomesteels.
简介:Sometimesmaindrivermotors’torqueexceedsthemaximumlimitinBaosteel’s5mheavyplatemill.Experienceshowedthattorqueoverloadedoccurredincasesofsomespecialrollingsequenceandspecialrollingplatedimension.Mostoftheoverloadedoccurredonlyinstantaneousatsometimepointduringtherollingpass,whichespeciallyeasilyhappenedatthebiteandmotoraccelerationtimeafterthebite.Thispaperanalyzestheimpactfactorsformotortorqueoverloadandcarefullystudiesthekeydetailsofthemillrollingspeedcontrol.Thesolutiontoimprovethespeedcontrolwasgivenatthepreconditionofkeepingproductionyield.Theimplementationofthesolutionsignificantlyreducedtheoccurrenceoftorqueoverloadedtimes.
简介:Anexperimentalapparatusandanumericalsimulationmodelwerebuiltforinvestigatingthedentresistanceoflightweightthree-piececans.Thedentresistanceofrawmaterials0.19mmT4and0.17mmDR7Mwascompared.Itwasfoundthatwhenthethicknessreducedfrom0.19to0.17mm,thedentresistancebecameabout80%ofthatbeforethinning.Thisprovidesaguidanceforthecontinuousthinningofthree-piececans.
简介:Samplesofthecrosssectionmicrostructuresofgalvannealedsteelsheetsthatlackalloyingwereanalyzed.X-raydiffraction(XRD)testswerecarriedout.Thestudydiscoversthatthedeficitofalloyingwashigheronbothsidesofthesteelsheetwhencomparedtothecenterandthethicknessofthecoatingonthesideswasalsohigherthanthecenter.TheresultsoftheXRDtestsdemonstratethatthemicrostructureofthecoatingwithalackofalloyismainlycomposedofzinc,ζandδ.Theyalsoindicatethatthelackofalloyingismainlyduetoalowergalvannealingtemperatureandthickercoating.Itisshownbytheopticalmicrographsofcoatingthattheδphaseformsfirstinadiscontinuousmannerattheinterfaceandthenrapidlypushestowardsthecoatingandenlarges.
简介:Duringtheingotcastingprocess,theparametricchangesofthemoltensteelpouringprocessoftencausebothingotsurfaceandinternalqualitydefects.Withtheincreasinglywideapplicationofcomputersinindustrialtechnology,numericalsimulationsofthemoltensteelpouringprocessenablepredictionsofthedefectsthatwillariseduringthepouringandsolidificationprocess,especiallyforthemoltensteelflowduringtheearlystagesofcasting.Inaddition,usingacomputertosimulatethecastingprocessofa40tingotandsolidificationcanpreventmanydefects.Thesimulationresultsindicatethatcontrollingthepouringspeedtolessthan80kg/s,hangingthecastingpowderinamoldwiththehangingheightmaintainedat100-150mm,andcontrollingthetaperangleofthemoldbrickoutlettoasuitablelevelcanreducetheprobabilityofslagentrapmentandimprovetheinternalandsurfacequalityoftheingot.
简介:Theutilizationofsteelslaghasbeenaworldwideissueforalongtime.Attentionisincreasinglybeingpaidtothetechnologicalinnovationanddevelopmentofsteelslag.Aimingatthedevelopmentofenvironmentallyfriendlysteelslagconcretematerialsandtheiruseinarecyclableeconomy,Baosteelhasrecentlybeenconductingresearchonandusingmanynewbuildingmaterials,includingsteelslagpowderconcrete,steelslagperviousconcrete,steelslagcounterweightconcreteandsoon.Inthisway,steelslaghasbeenturnedfromakindofsolidwasteintoavalue-addedmaterial.Thetechnologyofsteelslagutilizationhasbeenenrichedanddeveloped,whileanewmodelofusingBaosteelsteelslaginarecyclableeconomyhasalsobeenexploredandpractised.
简介:Steelhasbeenusedasatraditionalwheelmaterialsforalongtime.Before1980’s,over90%wheelsweremadeofsteels.Then,theyieldstrengthofwheelsteelsincreasedgraduallyfrom240-350MPato600MPaorhigher.Theadvancedhighstrengthsteelsbecomethemainwheelmaterials.Since1990’s,DP600hasbeenbroadlyappliedinsteelwheelsoversea.However,therewaslittleresearchofapplicationofhighstrengthsteelwheels(especiallywheeldisc)indomesticwheelindustrial.Inpresence,DP600steelwheelisonlydevelopedinFAWSHbyusingimportedCKD.OtherdomesticsteelwheelmanufacturersdidlittleworkonhighstrengthDP600wheeldiscs.BaosteelwheelsCo.Ltd.isthefirstdomesticcompanyproducingDP600steeldiscsandhasbecometheleadingcompanyinproductionofhighstrengthwheel.BecauseofthehighstrengthofDP600,itsformability,springback,andwrinklehavebecomethekeysofthesuccessfulapplicationofDP600steel.Inthispaper,themetallurgicalandmechanicalpropertiesarefirstlyintroducedandformationproblemsofDP600aredescribedcomparedtotraditionalsteels.Secondly,FLDanalysishasbeendone.Wrinkleandmorespringbackarerecognized.Tosolvetheseproblems,anoptimizedsolutionisdesignedandthegoodresultisobtained.ThetesthasshownthatthefatiguepropertyofsteelwheeldiscsmadebyDP600havebeengreatlyimproved.
简介:Usingmetallographicobservationandmechanicalmeasurement,themicrostructureandmechanicalpropertiesofGH4169Galloyhasbeeninvestigated.Theeffectofthephosphorus,borontraceelementsonmechanicalpropertiesoftheGH4169Galloyarecomparedandanalyzed.Theresultsshowedthatthehot-workabilityoftheGH4169Galloyisverygood.ThestressrupturespropertiesofGH4169Galloyisover3timesthanthetraditionalGH4169alloy.
简介:Thisstudyresearchescoldrolledultrahighstrengthmartensiticsteelprocessedbywaterquenching.Itisfoundthatboththequenchingandoverageingtemperaturesgreatlyinfluencethemechanicalpropertiesofmartensiticsteel.Atensilestrengthof1500MPacanbeobtainedfrom0.2%C-1.8%Mnsteelbysoakingat840℃,quenchingat700℃andoverageingat200℃forseveralminutes.Thecontinuouscoolingtransformation(CCT)diagramrevealsthatfullmartensitecanbeobtainedatacoolingrateof100℃/sorhigher;andatacoolingrateof3-10℃/s,austenitebarelydecomposesat700℃.Forsteelwith0.2%carbonandlessmanganese,austenitedecompositionoccursbeforeitiscooledto700℃atacoolingrateof3-10℃/s,whichleadstolowertensilestrength.Itispossibletoreducethemanganesecontentofthe1500MPamartensiticsteelbyincreasingthequenchingtemperature.Toincreasethequenchingtemperature,thecontrolofflatnessduringwaterquenchingbecomesamajorconcern.
简介:ThisstudyinvestigatesthepropertiesofBaosteelsteelslagandblastfurnace(BF)slaginordertodevelophigh-performancesteelslagandBFslagcompositeadmixturebyoptimizingthecompositemixingtechnique.BasedontheinvestigationofthestabilityofsteelslagpowderandtheperformanceofcementmortarindifferentmixingratiosanddifferentaddingamountsofsteelslagandBFslagcompositeadmixture,rationalmixingratiosandtheaddingamountrangeofsteelslagandBFslagcompositeadmixtureweredetermined.