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Chongqing Fengdong Heat Treatment Engineering Co., Ltd. is a one-stop heat treatment service provider engaged in heat treatment processing, heat treatment
equipment maintenance, technology development, service and consultation. Chongqing Fengdong Heat Treatment Engineering Co., Ltd. was established in May 2007 with a registered capital of more than 22.6 million yuan. Founded by Jiangsu Fengdong Thermal Technology Co., Ltd.

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Heat treatment process

Processing Products: Automotive Gears, Shaft and Rod Products, etc.

 

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Installation, relocation, maintenance, spare parts sales of heat treatment equipment

 

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Chongqing Fengdong Heat Treatment Engineering Co., Ltd. has nine unicase series controllable atmosphere box multi-purpose furnace production lines, one nitriding furnace, five tempering furnace, two dual-station cleaning machines, three shot blasting machines and one strong shot blasting machine. A set of precision controlled atmosphere push rod continuous furnace can carry out carburizing, nitriding, carbonitriding, protective atmosphere quenching...

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Description of control system for well vacuum furnace
Description
Descriptionofoperationsystemofwellvacuumfurnace:Thewell-typevacuumfurnacecontrolsystemusestemperaturecontrolthermocoupleandShanghaiGuolongintelligentdigitaldisplaytemperaturecontrolinstrumenttocontroltemperature.Thetemperaturecontrolinstrumentcanbeoperatedaccordingtothesettemperature,andcandisplaytheoreticalandmeasuredvalues.Thetemperaturecontrolsystemalsohasthefunctionofover-temperatureacoustoopticalarm.ThetemperaturerecorderofthecontrolsystemusesShanghaiDahuaChangtutemperaturerecordertorecordthefurnacetemperature.ThethermocoupleisKtype.Thecompensatingwireforfurnacetemperaturemeasurementisconnectedfromtheinstrumentcabinettothethermocoupleofthefurnacebodyandsuppliedbythesupplier.High-powerthyristorzero-crossingtriggersystemwithradiatorandair-cooledsystemisselectedfortheoperationandexecutionsystem.Atthesametime,itisequippedwithautomaticairswitchandfastmelterforsecondarymaintenance.Theon-offinstructionsofammeters,voltmetersandelectrothermalelementsaresetforeachgroupofelectrothermalelements,whichhavethemeasuresofinterlockingmaintenanceandsafegrounding.
Precautions before and after use of trolley annealing furnace
Precautions
Inordertofacilitatetheheatingoflargeworkpieces,atrolleytypefurnacesuitableforheatingingotsandbilletsispresented,andawelltypefurnaceisalsopresentedforheatinglongrods.Sincethe1920s,variousmechanizedandactivefurnaceshaveemerged,whichcanimprovetheoutputrateoffurnacesandtheworkingconditions.Withthedevelopmentoffuelresourcesandtheadvancementoffuelconversiontechnology,thefueloftrolleyannealingfurnacehasgraduallychangedfromsolidfuelssuchaslumpcoal,cokeandpulverizedcoaltogaseousandliquidfuelssuchasproducergas,citygas,naturalgas,dieseloilandfueloil,andvariousincinerationscorrespondingtothefuelsusedhavebeendeveloped.Burningequipment.Thestructure,heatingtechnology,temperaturecontrolandatmosphereoftrolleyannealingfurnacewilldirectlyaffectthequalityofprocessedproducts.Intheheatingfurnaceofcasting,improvingtheheatingtemperatureofmetalscanreducethedeformationresistance,buttoohightemperaturecancausegraingrowth,oxidationoroverheating,whichseriouslyaffectsthequalityoftheworkpiece.Intheprocessofheattreatment,ifthesteelisheatedtoapointabovethecriticaltemperatureandthensuddenlycooled,thehardnessandstrengthofthesteelcanbeimproved;ifthesteelisheatedtoapointbelowthecriticaltemperatureandthenslowlycooled,thehardnessofthesteelcanbereducedandthetoughnesscanbeimproved.Inordertoobtainworkpieceswithaccuratescaleandsmoothappearance,ortoreducemetaloxidationinordertoachievethepurposeofprotectingdiesandreducingprocessingallowance,variouskindsoflessoxidation-freeheatingfurnacescanbeselected.Inanopenflamefurnacewithlittleornooxidation,therecoverygasisproducedbyincompleteincinerationoffuel,inwhichtheoxidationlossratecanbereducedtolessthan0.3%byheatingtheworkpiece.Controllableatmospherefurnaceismanuallypreparedatmosphere,whichcanbeusedforgascarburizing,carbonitriding,brightquenching,normalizing,annealingandotherheattreatmenttoachievethepurposeofchangingthemetallographicarrangementandimprovingthemechanicalpropertiesoftheworkpiece.Inthemovableparticlefurnace,theburninggasoffuelorotherfluidizersappliedexternallyareusedtoflowthroughthegraphiteparticlesorotherlazyparticlelayersonthebedforcibly.Theworkpieceburiedintheparticlelayersmaybeheatedintensively,andallkindsofnon-oxidizingheatingsuchascarburizingandnitridingcanalsobecarriedout.Inthesaltbathfurnace,moltensaltliquidisusedasheatingmediumtopreventoxidationanddecarbonizationoftheworkpiece.Castironsmeltingincupolaisusuallyinfluencedbycokequality,airsupplymethod,burdenconditionandairtemperature,whichmakesthesmeltingprocessdifficulttobestableandhighqualityhotmetaldifficulttobeobtained.Hotblastcupolacaneffectivelyimprovehotmetaltemperature,reducealloyburningloss,andreducetheoxidationrateofhotmetal,thusproducinghigh-gradecastiron.Withtheappearanceofcorelessinductionfurnace,cupolahasgraduallybeenreplaced.Thesmeltingoperationofthisinductionfurnaceisnotconstrainedbyanygradeofcastiron.Itcanquicklychangefromsmeltingonegradeofcastirontosmeltinganothergradeofcastiron,whichisconducivetoimprovingthequalityofmolteniron.Somespecialalloysteels,suchasultra-lowcarbonstainlesssteelandsteelsforrollsandsteamturbinerotors,needtomeltmoltensteelfromopen-hearthfurnaceorgeneralelectricarcfurnace,removeimpuritiesinrefiningfurnacethroughvacuumdegassingandargonagitation,andfurtherrefinehighpurityandlargecapacityofhigh-qualitymoltensteel.Flamefurnaceshaveawiderangeoffuelsandlowprices,whichmakeiteasytoadoptdifferentstructuresandreduceproductioncosts.However,flamefurnacesaredifficulttooperateaccurately,whichcausesevereenvironmentalpollutionandlowthermalefficiency.Thecharacteristicsoftheelectricfurnacearethatthefurnacetemperatureisuniformandeasytocompleteactivecontrol,andtheheatingqualityisgood.Accordingtothemethodofenergyconversion,electricfurnacecanbedividedintoresistancefurnace,inductionfurnaceandarcfurnace.Furnaceheatingcapacitycalculatedbyunittimeperunitareaoffurnacebottomiscalledfurnaceyield.Thefastertheheatingrateofthefurnaceandthelargertheloadofthefurnace,thehighertheproductivityofthefurnace.Ingeneral,thehigherthefurnaceyield,thelowertheunitheatconsumptionperkilogramofmaterial.Therefore,inordertoreduceenergyconsumption,full-loadproductionshouldbecarriedout,furnaceproductionrateshouldbeimprovedasfaraspossible,andtheactiveshareoffuelandcombustion-supportingairshouldbeadjustedforincinerationequipmenttopreventexcessorlackofair.Inaddition,thelossofheatstorageandheatdissipationoffurnacewall,heatlossofwatercoolingcomponents,radiationheatlossofvariousopenings,heatlossofoff-furnacefluegasandsoonshouldbereduced.Theratiooftheheatabsorbedbymetalsormaterialswhenheatedtotheheatsuppliedtothefurnaceiscalledfurnacethermalefficiency.Continuousfurnacesaremoreefficientthandiscontinuousfurnacesbecauseoftheirhighproductivityanduninterruptedoperation.Theheatsystemofthefurnaceisinastablestateandthereisnoperiodiclossofheatstorageonthewall.Thereisalsoasectionofpreheatingburdeninthefurnace,andsomewasteheatofthefluegasisduetoapreheatingfurnaceinsidethefurnace.Inthematerialsection,someresidualheatofthefluegasisabsorbedbythecoldworkpieceenteringthefurnac
Brief Introduction and Process Flow of Box Quenching Furnace
Brief
Boxquenchingfurnace,alsoknownasharddieforgingordurableforging,isthewaytoobtaincastingsbypouringmeltedaluminiumalloyintometalmold.Aluminumalloysolidmeltingfurnaceboxquenchingfurnacemostlyusesmetalcoreorsandcoreorshellcore.Comparedwithpressureforging,theremainingservicelifeofaluminiumalloysolidmeltingfurnaceislonger.2,forgingstrengths(1)strengthsThecoolingrateofthemetalmouldisfaster,thecastingstructureisfinerandcanbestrengthenedbyheattreatment.Themechanicalpropertiesofthemetalmouldare15%higherthanthatofthesandforging.Castingqualityisstableinboxquenchingfurnace,surfaceroughnessisbetterthansandforging,andwasterateislow.Goodworkingconditions,highproductivity,easyforworkerstomaster.(2)shortcomingsThethermalconductivityofmetalmoldislargeanditsfillingcapacityispoor.Metalwoodbodyhasnoairpermeability.Itisnecessarytoadoptcorrespondingmeasuresinordertoexhausteffectively.Metalmoldisnon-yieldingandeasytocrackanddeformduringsolidification.
Brief Introduction and Classification of Basic Structure of Box Quenching Furnace
Brief
Boxquenchingfurnaceisaperiodicoperationfurnace,whichissuitablefortheheattreatmentofrodandlongshaftparts.Thestructureoftheboxquenchingfurnaceisthatthefurnacebodyisadeepcylindricalwell,andtheworkpieceisheatedverticallybyaspecialcrane.Thefuelusedisusuallygasandfuel.Whenelectricityisusedasheatsource,itiscalledwellresistancefurnace.Boxquenchingfurnaceisgenerallyplacedbelowtheflooroftheworkshop,butalsoaboveorbelowhalfofthefloor.Thenamesofboxquenchingfurnaceincludeforcedconvectionboxquenchingfurnace,naturalconvectionboxquenchingfurnace,wellgascarburizingfurnace,etc.Theboxquenchingfurnacecanbeheatedeitherbygasorliquidfuelorbyelectricity.Whenusinggasfuel,thereareusuallyseveralsmallenergyburnersinstalledalongthetangentialdirectionoftheinnerwallofthefurnace.Theburnersareevenlyarrangedinlayersorspiralsinheighttoavoidthedirecterosionoftheworkpiecebytheflameandensuretheuniformtemperatureinthefurnace.Whenusedforlowtemperaturetemperingoroilastendermaterial,athinmufflewallisbuiltinthefurnacetoseparatethecombustionspacefromtheheatingspace,buttheboxquenchingfurnacewithmufflewallconsumesmorefuel.

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