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Heat treatment wi a hand, heat treatment workshop

Theseprovisionsshallapplytoguidetheheattreatmentworkshoponcarbonstructuralsteel,alloysteel,carbontoolsteelandalloytoolsteelheattreatmentcommonly.1.HeattreatmentfurnaceHeattreatmentfurnaceisakeylinktoensurethequalityofheattreatment.Withimproperfurnacewillmakeabigdifferencetothequalityofheattreatment,mustpayspecialattentionto.Usuallyshouldconsiderthefollowingfactors:1)firstofalltoconsiderthecategoryoftheheattreatment.Accordingtothechemicalcompositionofworkpiecechooseannealing,normalizing,quenching,tempering,matchwiththesameheattreatmentfurnace.Notsimilarwithheattreatmentfurnace,thenwemustanalysisthewholeprocessofthewholeheattreatmentofallmaterials,reasonableorganizationitssequenceofoperation,toseeifitcanandfurnace.2)withthefurnace,butalsowiththefurnaceheattreatmentofmaterials,quenching,normalizingthehighestmaximumheatingtemperaturedifferenceshouldbelessthan20℃,thetemperingtemperatureshallbewithinthescopeoftheunified,theheatingrateshouldchoosetheslowestone.Alsocanusethemethodofpartialoutcoordination.3)withthefurnace,alsowanttoconsiderheattreatmentofworkpiecesizedifferenceisnottoolarge,theaveragemaximumcrosssectionandtheratiooftheminimumcrosssectionshouldbecontrolledwithin2~2.5.Canalsotakethesizeofabatchoutcoordination.Thesameworkpiecesizeistoobig,shouldconsiderpackagecoverinsulatinglayertoprotectit.4)andthetype,andthefurnacesizeandstriveforabatchofproductstogetherwiththefurnaceheattreatment.Theseparatedsampleshouldalsobeinthesamefurnaceheattreatment.Furnacecharging,thesampleshouldbeplacedintherightplaceinthefurnace.2.Thepreparingworkbeforeheattreatmentfurnacecharging1)tocheckwhethertheequipmentisingoodconditionbeforeloadingfurnace,furnacebodyisdamaged.Allactivitiesofthecomponents(ovendoor,car,etc.)ifthemovementisnormal.Electriccircuitworkingconditionareingoodcondition.Carsurfaceisclean.2)checkwhetherthecoolingmediumisspare,circulatorysystemworkisnormal.3)checkthethermocoupletemperaturemeasurementrecordinginstrument,controlsystemsareingoodcondition.4)checktheauxiliaryequipmentiscomplete.Especiallyliftingequipment,steelwirerope,sling,fixturewhetheradaptation,isdamaged,issafe.5)checktheheattreatmentofworkpiecequality:checkthesteelgrade,sizeofworkpiece.Checkwhetherthereisanydefectonthesurface,cracking,andwillcauseheatcrackingpotentialdefects.Artifacts,withmoldcavitywithandwithoutoil,waterandwasteresidue,considerafterclean,whethertofillwithheat-resistantmaterial.Ifthereareanydefects,bending,shouldbecleaningandstraightening.3.Heattreatmentfurnace1)eachfurnacefurnacechargingamountshallnotexceedthemaximumnumberoffurnacechargingelectricregulation.Allthesizeoftheworkpieceshouldbeadaptedtothesizeoftheelectricfurnacestudio.2)thepositionoftheworkpieceloadingfurnaceshouldbewithinthefurnaceheatingzone.Beforeandaftertheupanddownorso,andkeepacertaindistancewithresistancewire.Shouldbepaddedunderiron,shouldbeseparatedwitha30mm,toensurethecirculationoftheheatflow.3)thepositionoftheworkpieceloadingfurnaceshouldbeaccordingtothedistributionoffurnaceanalysis,foravarietyofbrandandthesizeoftheworkpiecetoadapttoconsideroperationordercanbereleased.4)furnacecharging,theunderlyingblockshouldbeflat,artifactsinthecartobeuniform,frombottomtotoptoarrange,paperbackstableMATS,inordertoavoidfurnacecharging,causetheregionaltemperaturedifference,andpreventthecarmovesside,pourthecrib,impactfurnacewall.5)forultra-thinlongworkpiece,whenassemblingfurnace,allwanttoconsideritsstacklocationinthefurnace,adoptingtechnologymeasures,topreventagainstdeformationheatingandlifting.6)forartifactshavebeenfinishing,furnacechargingprotectionresponsetotheworkpiecesurfaceandtheedgesandcorners,topreventoxidationdecarburizationandbruised.Thepartsoftheworkpieceispronetocracking(concavecavity,thesharpcorners,thread,slots,etc.)applicationoftheinsulationtoprotectit.7)afterthecarintothefurnace,ifthereisheatfurnacedamagetocausemajorgapstobesealed.4.Normalizingheattreatment,quenching,tempering,annealingtemperatureandholdingtimecontrol1)thetemperatureofheattreatment,heatpreservationareimportantbasisforinstrumenttemperature.Intheheattreatmentprocess,mustcheckthetemperatureofthefurnaceandthetemperatureoftheworkpieceandtheinstrumentshows.Ifthereisaproblemtoinformelectriciantocheckrepairinstrumentation.2)heattreatmentindustrytodothreefrequently:regulartemperature,frequentlylookatmaterialtemperature,regularadjustmentcontrol,ensurethateachpartofthefurnacetemperatureuniformity,maintainpositivepressureinthefurnace.3)normalizing,quenching,tempering,annealingtemperatureandfurnaceintegratedandselectedinpracticestrictcontrol,accordingtotherequirementoftheinstructionistoensurethatthefirstconditionofheattreatmentquality.Organizationsbecauseoflowheatingtemperature,phaseshiftwillhappen;Andtheheatingtemperatureistoohigh,canmaketheausteniticgrainsizegrewuptoomuch,causeproblemsforcoolingphasetheorganizationchange.Somustbestrictlyinaccordancewiththerequirementsoftheworkinstruction,donotarbitrarilysethighsetlower.4)normalizing,quenching,tempering,annealing,heatpreservationtimeshouldalsobestrictlycon

Viewmore Date: 2019-04-30

What is the difference between heat transfer coefficient and thermal conductivity?

Thecoefficientofheattransferinthepastthatthetotalheattransfercoefficient.Thecurrentnationalstandardspecificationunifiednamefortheheattransfercoefficient.HeattransfercoefficientKvalue,referstothesteadyheattransferconditions,thepalisadestructureonbothsidesoftheairtemperatureof1degrees(K,℃),1hoursby1squaremeterareaofheattransfer,theunitisthewattspersquaremetre,degrees(W/㎡,K,Kherecanbesubstitutedfor℃).Coefficientofthermalconductivityisreferstoundertheconditionofsteadyheattransfer,1mthickmaterial,thesurfacetemperatureonbothsidestoonedegree(K,℃),withinanhour,by1squaremeterareaofheattransfer,theunitforW/m,c(W/mK,hereforKcanbesubstitutedfor℃).Coefficientofthermalconductivityandmaterialcomposition,density,moisturecontent,temperatureandotherfactors.Amorphousstructure,thelowdensitymaterial,smallthermalconductivity.Themoisturecontentofmaterials,thetemperatureislower,smallerthermalconductivity.Thelowcoefficientofthermalconductivityofmaterialsusuallyreferredtoasthermalinsulationmaterial,andthecoefficientofthermalconductivityinthe0.05w/m,thefollowingmaterialiscalledtheefficientthermalinsulationmaterial.

Viewmore Date: 2019-04-30

Original high temperature heat treatment crush bamboo sticks a full set of production technology in our country

"Wouldratherfeedwithouttheflesh,cannotjumozhu".AlthoughChinesepeoplehaveacertainculturalcomplexonbamboo,thereisnolackofourlifehasalsobeenbambooproducts,butmostpeoplestilldecayresistanceofbamboomaterialsremainsceptical,letaloneuseoutdoors.NanjingforestryuniversityprofessorLiYanjunwonthesecondprizeofnationalscientificandtechnologicalprogresshasproject"highperformanceofbamboofibercompositematerialsmanufacturingkeytechnologyandapplication"isabreakthroughintheapplicationofoutdoorbamboomaterialrestructuringmanydifficulties,createdanewfieldofbambooprocessingandutilization.InLiYanjunoffice,thereportersawtheproudofhisworks,outdoorbambooreorganizationmaterialseriesproducts,suchasoutdooruseofrecombinantbambooflooring,wallpanel,fence,gardenmaterial,etc.Fromtheappearance,almostdon'tseeanytracesofglue,thesurfacetexturealsolookslikearealwoodfloor,holdingtheweightisheavy,morethanthegeneralrealwoodfloor.So-calledreorganizationofoutdoorbambooflooristousebamboostickstocrushreliefmodification,bydippingadhesiveprocesssuchasagglutinationsuppressionofproducts.Thenewbamboofloornon-toxic,doesnotglue,andalsonoteasydeformation,andsuperinsect-resistanteatbymoth,andotherfunctions.Generalbambooflooringproductsaremostlyusedinindoor,inthesouth,withhighhumidityproductseasytomildewandrot;Inthenorth,itistheway.LiYanjunandhisteamsawrealizationofrecombinantbamboo"victorieswithbamboowood"isanoutdoormaterialsused,canrelievelargediameterimportedhigh-qualitytimber,supplyindustrydevelopmentprospects,asaresult,basedontheresourceutilizationofbambooplywoodindustryislow,lowproductionefficiency,producthomogeneityseriousproblems,suchasprojectteamcooperationwithseveralbambooproductionenterprises,intheprocessofdevelopment,combinedwiththeproductiontechnologyofbamboo"restructuring",threedifferentkindsoftechnicalroute,thebeginningof2007inMay2008completereorganizationofoutdoorbambooLABS."Thefindingsofourresearchanddevelopmentcannotonlystayinthelab,moreneedstobeextendedtotheactualproductionapplications."LiYanjunoutdoorrecombinantbamboomaterialhaveappearedinourside,the2010worldexpo,2014nanjingyouthOlympicGamesareareorganizationofoutdoorbambooflooring,wallpanel,fence,gardenmaterial,etc.Afternearly10yearsofproduction"jointly,LiYanjunandteambrokethroughthebamboo,bamboosticks,hightemperatureheattreatment,fineorganizationefficientrestructuring,thekeytechniquessuchasthecreationofarelief,keyequipment,suchashighheattreatmentandformingdevelopedfourserieshighperformanceofbamboofibercompositematerials,toovercomethedifficultyintheagglutination,bamboobamboogreenyelloweasyrottenbottlenecksrestrictingthedevelopmentofindustrialtechnology,anumberofinnovativeachievements.Wonthedomesticandforeignpatent14pieces,formulatedthe"outdoorrecombinantbamboo"nationalstandards;Establishedtheindustrializationdemonstrationproductionline6,realizethestableproduction.Theprojectimplementation,makeourcountrybecometheworld'sonlyhavemanufacturingoutdoorrestructuringforrawmaterialwithhightemperatureheattreatmentcrushbamboosplitbambooafullsetofproductiontechnologyandproduct.

Viewmore Date: 2019-04-30

Fire suddenly encountered in the process of vacuum heat treatment distortion

Inrecentyears,withtheautopartsheattreatmenttechnologyismoreandmoremature,thegeometryprecisionofworkpieceafterheattreatmentismoreandmoredemanding.Quenchingdeformationofworkpiecegeometryprecisionofdeclineinevitably.Quenchheatingto850~850℃,andhightemperaturetendstoproduceadverseeffect,forexample:producedistortion,etc.Mouldedtypevacuumquenchingalsocalledpressurequenching,istheeffectivemeasuretoreducethequenchingdistortionandwidelyappliedinautomobileindustry.Vacuumquenchingdistortionisthemostcommonproblemsintheprocessofheattreatment,forbatchproductionofbearingsandgears,controlofquenchingdistortionistoimprovetheinnerqualityandtheservicelifeoftheproduct.Formaterialsforcarburizingsteel(suchascarburizingbearingsteelG20CrNi2MoA)orgearwithlowalloysteel(18crmnti,etc.),finishedproductrequirementsmustbecarburizedlayerthickness,goodsurfacetoughnessofhighhardnessofthecorerequirements.Thediequenchingtechnologyistopreventquenchingdistortion,directandeffectivemeasuresforpromotingthevoltagequalificationrate.Againstdistortionofproblemsfacedintheprocessofvacuumquenching,thereisakindofeffectivecontrolofthedistortionofthediequenchingtechnologyandequipment,may,bywayofcontrolforcesize,cycleandadjustthestructureofthequenchingmouldandsize,controltheflowofcoolingfluid,flowpatternandflow,etc.,tocontrolthedistortionprocess,reducethedistortionoftheworkpiece,onthepremiseofmeettherequirementsofquenching,themoldandmachinetoolportfolioasawhole,providesthequenchingprocessofdiequenchingtechnologyandequipment,whileguaranteethehardnessandmetallographicrequirements,maintaintheconsistencyofthequenchingworkpiece,thequenchingqualitycontrolinthebestlevel,andputintoindustrialapplication,thecomprehensivereducethequenchingdistortion.Mouldedvacuumquenchingtechnologyof0cr17ni4cu4nbsteelintheprocessofimplementationinsolidsolutionandsolidsolutionplusagingunderthetwostatesoftwodifferentnitridingprocesstest,thispaperdiscussestheprocesstemperature,ammoniadecompositionrate,theoriginalorganizationlayerdepthofthematerial,theinfluenceofthemicrostructureandpropertiesafternitriding.Theresultsshowedthataftersolidsolutioneffect,0cr17ni4cu4nbsteelnitridingafternitridinglayerdepth,surfacehardnessandthecorehardnessisbasicallythesame,canconsidertousedirectlyaftersolidsolutionnitriding;540℃afternitridingisbetterthan480℃afternitridingperformance.

Viewmore Date: 2019-04-30

The 16th China International Exhibition industrial heat treatment furnace impressive breeze

BytheChinaassociationofautomobilemanufacturers,Chinanonferrousmetalsindustryassociation,chongqingeconomyandinformationtechnologycommission,sponsoredbythemediumassociationbranchofindustrialfurnacethe16thChinainternationalexhibitiononheattreatmentfurnaceisonMarch31-April2inchongqinginternationalexpocenter.ChinainternationalexhibitiononheattreatmentindustrialfurnaceisinwesternChinaheattreatmentindustry'smostinfluentialandfamousbrandofprofessionalexhibition.TheexhibitionsincelastSeptembertostarttheregistrationworkoftheindustryhighattentionandactivelyparticipateinmanyenterprisesathomeandabroad.Bytheorganizingcommitteeofthestatistics,asoftheendofDecember2015,theexhibitionhasattractedincreasinglyhuisen,ckwalker,shouldreachindustry,ridgethermal,FengDong,ishikawaisland,goodreputation,Swissalloybyvacuum,CLP,potential,SSI,constantelectricheating,tianyixing,esther,ITO,mechanicandbucket,panguautomation,pengfeng,junjinheatpreservationofscienceandtechnology,shanxigentlemenandbeauty,DLX,kawah58offivecountriesandregionssuchaswell-knownenterprises,greatachievementshavebeenmadeinChinamerchants!Comparedwiththepast,theheattreatmentofexhibitionheld"2016chongqingBBSandheattreatmenttechnologyinnovationnewproductnewtechnologyseminarbecomeamajorbrightspot.Ipsencompanywillhighlightsthelatestachievementsofscienceandtechnology-newATLASbox-typemulti-purposefurnaceandHybridCarbCirculationcarburizingnewapplication;Shenyangjiareputationvacuumtechnologyco.,LTDonhigh-pressuregasquenchingfurnaceintheapplicationofadvancedindustryreport;Heattreatmentinliaoningprovincetolearnonwindpowerequipmentheattreatmenttechnologyforlargecomponentstechnicalcommunicationreport;Bopotentialbusinessalsowillsharebopotentialcustomerstochongqingregioninthelatestdevelopmentsinthefieldofhardnesstesterandthelatesttechnologyproducts.

Viewmore Date: 2016-06-28
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