简介：Owingtothedevelopmentofnewproductsandhigherrequirementofproductproperties,thecurrentexistinginductionheatingtechnologyofBaosteelcannolongersatisfythenewrequirementsoftheproductline.Controloftheinductionheatingtemperaturetoanappropriatevalueisakeyconsiderationininductionheatingtechnology.Toobtainacculturatedtemperatures,investigationswerefocusedontheparametersofaninductionheatingsystem,includingthoseofinductionheatingequipmentandheatingprocesses.Intheseinvestigations,computersimulationwasusedtomodeltheinductionheatingprocess,followedbyphysicalexperimentationtoverifyandimprovethesimulationmodel;finally,optimizedinductionheatingparametersweresuggested.Theuseofcomputersimulationsdramaticallydecreasedphysicalexperimentaltimes,andthecomputedheatingparameterswereusedtoguidethephysicalexperimentationanddesignoftheproductline;thisincreasedtheefficiencyofsubsequentinvestigations.ThisstudyfocusesonthedevelopmentofinductionheatingtechnologyinBaosteel,whichincludestheoverallinductionheatingtechnologyusedinmanufacturingbackuprollersandinthethermomechanicalcontrolprocess.

简介：Thetemperaturedistributionofsteelplatesisaffectedbyheatingratesandheatingcurvesintheprocessofinductionheating.Themagneticfluxdensityinsidetheinductionfurnacewasmeasured,thedistributionofmagneticfluxdensitywasanalyzedandtheuniformareaoftheinductionheatingtemperaturedistributionwasascertained.Thelocationsformeasuringtemperatureweresetandthetemperatureindifferentprocesseswasmeasured.Theinfluenceofheatingratesandheatingcurvesonthetemperature...

简介：Intheproductionofhotextrusionpipes,thebilletwillbeheatedinaninductionfurnace,beforepiercingorextrusion,toacertaintemperature.Theinductionheatingtemperaturefieldprofileinthebilletwillexertaninfluenceonthedeformationprocesses.ThestudyhasdevelopedandataconversionprogramtoconvertthetemperaturedatafrominductionheatingbyANSYStodeformationsimulationsoftwareDEFORM;therefore,notonlytherelativelyaccuratetemperaturefieldcanbemadeavailable,comparedwiththeusuallyassumeduniformtemperaturefield,butalsotheconnectionbetweeninductionheatinganddeformationcanbeestablished,whichisessentialtoevaluatetheprocessingparameters.Numericalsimulationofthepiercingprocessesofdifferenttemperaturefieldsbyinductionheatingwascarriedout,andtheresultshaveshownthatthedifferentinitialtemperaturefieldsinthebilletcanleadtodifferentdeformationcurves,whichindicatesthattheconversionprogramisnecessarytostudytheproductionprocessofhotextrusionpipes.

简介：Toaddressthephenomenonofsparkingduringtheedgeinductionheatingprocessinhotstripmills,thispaperusesnumericalsimulationtosystematicallyinvestigatethekeyfactorsinfluencingsparkingandtheireffects.Thedistributionofinducedcurrentdensityinthesteelplateaboverollerconveyortableduringtheheatingprocessiscalculatedandcomparedunderdifferentconditions,includingtherelativepositionsofthesteelplateandinductioncoil,thewidthofthesteelplate,andchangesinload.Theresultsshowthatwhenanarrowsteelplateisheatedorthesteelplateshiftstothesideoftheinductioncoil,sparkingbetweenthesteelplateandrollerconveyorismorelikelytooccur.

简介：Amagneticandtemperaturefield-coupledmathematicalmodelisproposedtocalculatetheinductionheatingprocessofadiscardsubstitutionblockforbillethotextrusionprocess.Themathematicalmodelisvalidatedbycomparingsimulationresultswithtemperaturemeasurementsrecordedduringphysicalmodeling.Basedonsystematicalanalysisofcalculationresults,aquantitativesawtoothinductionpowercurvewasproposedtorealizetheaimofachievingthebestdistributedtemperaturefieldintheblockwithintheshortestinductiontime.

简介：Expansionisanimportantoperationinthehotextrusionproductionlineofseamlesssteeltubes,whichistoproduceproperhollowbilletsforextrusion.Thebilletgoesthroughinductionheatingbeforeexpandedtoacquireapropertemperature.Inthisstudy,theeffectsofthreetypesofinhomogeneoustemperaturefieldson321stainlesstubesduringtheexpansionprocessweresimulated.Theresultshaveindicatedthatitwasanoptimumtemperaturefiledforexpansion,wherethetemperaturevariedlinearlyalongradialdirectionandthetemperaturewaslowerontheinnersurface.Thistemperaturefieldisbeneficialtoimprovingthestabilityofexpansionandensuringdimensionalaccuracyandincreasingtheutilizationrateoftubularbilletmaterial.

简介：Aself-developedelectromagneticinduction-heatingdevicewasusedtoinvestigatethevariationinthemicrostructureandpropertiesofX80pipelinesteelintherapidinductiontemperingprocessatdifferentprocessparameters.Theeffectsofthetemperingconditionontoughness,microstructure,sizeanddistributionofprecipitatesofX80pipelinesteelwereobservedusingametallographicmicroscopyandscanningelectronmicroscopy.Comparedwiththesamplespreparedviatraditionaltemperingtechniques,resultsshowthatthesamplespreparedviarapidinductiontemperinghadimprovedperformances.Whentheheatingtemperatureis590℃,ataholdingtimeof90s,itwasfoundthatacicularferritewasrefined,carboniteprecipitationwassmall,andprecipitateswereevenlydistributedinthematrix.Thelow-temperatureimpactenergy,alsoknownastheimpactabsorptionenergy,at-40℃wasfoundtobe430.5Jfortherapidinductiontemperingsamplesand323.2Jforthetraditionallytemperedsample.Thelow-temperatureimpactenergyat-60℃wasfoundtobe351.3Jfortherapidinductiontemperedsampleand312.1Jforthetraditiontemperingsample.

简介：Hydrogen,asatemporaryelementintitaniumalloys,isverygoodincontrollingmicrostructure.ThemicrostructureandphasetransformationofTi6A14ValloyareaffectedbytheamountofTiH,addedintothemeltofTi6A14Valloyduringtheinductionskullmelting（ISM）process.Thisprocess,calledmelthydrogenation,wasstudiedinthispaperthroughtheuseofopticalmicroscopy,scanningelectronmicroscopy（SEM）andtransmissionelectronmicroscopy（TEM）.Theresultsareasfollows:aftermelthydrogenation,boththesolidificationmacrostructureandmicrostructureofTi6A14Valloyarerefined;theαphaseprecipitatesinalamellarformwiththeresidualβphasefromthegrainboundaries;δ-hydridesprecipitateduringthesolidificationprocessasaresultoftheexistenceofhydrogen.TheSphasewithanF.C.C.structurecanbeobservedbyTEMintheαphaselaminaeofspecimenswith1.25%TiH2.Inaddition,thedependenceofthemicrohardnessofspecimensontheweightpercentageofTiH,addedtothemeltduringtheISMprocesswasalsostudied.