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机械外文翻译--我国渗透铸造技术的发展.doc

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机械外文翻译--我国渗透铸造技术的发展.doc

ThedevelopmentofcastingpenetrationtechnologyinourcountryInfiltrationcastingissolidifiedinthecastingprocesstoachievesurfacealloyingofaproductiontechnology,becauseofthedepthofalloying,andproductionprocessissimple,lowcostadvantages,inmanyuniquesurfaceenhancementtechnology,moreandmorepeopleimportance.Thebasicideaistoallowliquidmetaltoinfiltratethroughtheporousalloycoating,thesiegeofalloyparticles,fluxandotheradditivesincommonunderthematerializedthroughaseriesofhightemperaturemetallurgicalreactionintheoriginallocationoftheformationofalloycoatinglayer,themodelThekeyisinsidethemetaltopenetratethecoating.AsaresultofinfiltrationofMöCinterfaceaftertherapidexpansionofalloyingelementsconducivetothespreadoftheliquidmetalhasacertaindepthandthestabilityofthealloylayer.Thisnewprocessappliestochromium,boron,tungsten,etc.asthemainalloyingelementsinsteel,castironoftheantiwear,heatresistantalloylayertoobtaingoodresults.However,thetechnologystillexistsasfollows1alloyingprocessgas,slag,etc.cannotbedischargedintime,inthealloylayergeneratedpores,inclusions,affectingthequalityofalloylayer,2theeffectofalloyingontheprocessmoresensitivetochangesinparameters,theequipmentmusthavegoodconditionsandstrictproductionprocessinordertobeinmassproductionthequalityofthesurfacealloyisstableandreliableproduct.Inresponsetotheseproblems,the20thcentury,sincethe90s,thedomesticmaterialinfiltrationcastingtechnologyworkerscarriedoutextensiveandindepthresearch,andhaveachievedgoodresults,andinmining,metallurgyandotherfieldsshowthatabroadapplicationprospects.1ThechoiceofmaterialsInordertoobtainspecialpropertiesofcastalloysurfaceinfiltration,usuallyagoodchoiceofabrasionresistance,highhardnessoftheantiwearalloyforinfiltrationcastingagents,metalmatrixcastironorsteelused.Kevinpermeabilitymaterialbetweenelementsofthematchingcoefficientofthermalexpansion,andwettingandphaseresponseaslowaspossibleisourfirstandforemosttheprincipleofselection.1.1castingagentdialysisoptionsInordertoobtainhighhardnessoftheantiwearalloylayer,alargenumberofstudiesusedbyWCHV2400,CrFe,BFeinfiltrationcastingagent,etc.,butalsojoinedtheTi,Nb,Co,Niandotherelementstoimprovethepermeabilityalloycastingandotherperformance..Infiltrationcastingagentaddedcosolvent.Itsroleistopromotethealloymelttoformthefunctionofreducingatmosphere,toensuretherapidformationofalloylayer,densewithoutdefects,allmaterialspreparedinaccordancewithaspecificformoftechnology,alargenumberofstudieshaveprovedInordertoreducethelayerofcastingporosityandfoldersJavaflaw,shouldminimizetheamountofbinder.WCcanbedescribedasthelargestnumberofpeoplecurrentlyusingacastingagentpermeability,comparedwiththeironandsteelmaterials,WChashighhardnessandhighredhardness,thecompressivestrengthofWCatthesametime,thermalconductivityandYoungsmodulusratioofhighsteelmaterial24timesthesamehighspeedsteelwithhighstrengthandhightoughness,WCowndecisionmanyadvantagesincuttingtools,wearpartsandhighspeedrollingmilltheextensiveapplication.1.2MetalMatrixSelectionInadditiontothemetalsubstrateshouldhavesufficientstrengthandtoughness,butmoreimportantly,istheWC,CrFe,BFealloy,suchascastingagentsdialysisagoodwettabilityandacertaindegreeofsolubilityinordertoensuretheformationofinterfacialenergyfortheirongroupofthesolidsolutionmatrix,thatistosaysothatmetallurgicalbondinginterfacewastoenhancethebondstrength.Researchisoftenusedforcastironsteelalloyormetalmatrix.Castironthansteel,itslowmeltingpoint,goodliquidity,whichisconducivetoinfiltration,butwithCandtheimpurityelementsinhightemperatureundertheintensereaction,thusaffectingtheinterfacialbonding,Practiceprovedthatcastironbasedinfiltrationresistanceofmaterialsusedtomakemorelowstressabrasivewearofthewearresistantconditionsweremoreappropriate,andtheoverallrequirementsforsomegoodcomprehensivemechanicalproperties,andaspecialperformanceoftheworksurfacesuchascorrosionresistance,heatresistance,wearresistanceoftheworkpiece,thematrixmetalmustbecaststeel,inordertomeetthetoughpartsintheperformanceofthehardwarerequirementsofsteelcastingswithahighsolidificationtemperature,rapidsolidification,thecharacteristicsofpoorliquidityandhencetheformationofqualifiedcastalloylayerinfiltrationdifficult.Ifthemetalcoatingorcastingmoldwiththenegativepressurevacuumsuction,totheformationof45mmdiffusionofalloyingelementsorthemotherliquortoinfiltrateintothesurfaceofalloysteelcastingtypelayer.XinjiangInstituteofTechnologydevelopedundertheconditionsinthegravitationalfield,throughthesuppressionofalloy粉膏fastermachines,areasonablechoiceofalloypowdercomposition,theuseofhotmoltensteelastrongroleinthesurfacelayerofsteelcastings78mmthicklayerofalloy,layerandbetterqualitycasting.2.InfiltrationcastingprocessInfiltrationcastingprocessstatusof2isprealloypowderwillbefixedinthemoldofaspecificlocationonthewall,throughthemethodofpouringacastingsurfacetoformawearresistant,corrosionresistance,hightemperatureandotherspecialpropertiesofthesurface,thecurrentprocessesusedmainlyusesthefollowingtechniquesbycastingagentinfiltrationintotheformationofdifferentcoatingmethod,plasterblockmethod,castinganegativepermeabilitybycastinggravityfieldcanbedividedintodifferentpouring,pouringhypergravityfield.3.domesticresearchandapplication20thcentury80s,TsinghuaUniversityandothervulnerablepeopleinthesouthandcastdialysiswerestudied.Themtohighchromiumwhiteironbased,adifferentnumberofembeddedWCparticlesasapercolationcastmaterial.Andsurfacelayercastingmaterialsthatmatchtheselectionofwearresistantsteelcastingmetal30NnSiTi,thesteelstrengthwithgoodtoughness,lowcontentofalloyingelements,thepricecheap,quenchingtemperaturethebasiclayerforthesurfaceofcastingrequirements.TheyusedthisprocessonthepermeabilityofhighchromiumwhitecastironcompositematerialimpactonthefanboardmillExperimentalresultsshowthatthewearresistanceofcompositematerialsthantheimpactofrawmaterialsZG50M2boardtoimprovethewearresistanceof28.WCpercolationofthesurfacewearresistancecasthighchromiumwhitecastironsurfacelayerofthewearresistanceincreased7times.Literature1ThestudyalsoshowedthatWCandagoodmetalwettingliquid,easytorestorethesurfaceoxides,thecasthasgoodpermeabilityproperties.WClayercanbeadjustedbecauseoftheirsize,distribution,highmicrohardness,ithasexcellentantiwearperformance.InfiltrationcastingWC,ductileironmaterialsselected,highmanganesesteel,carbonsteelcanbesatisfiedwiththelayer,tofacilitatetheproductionandapplicationofresearchresultsguidemill,cementshotcreteliningofthedevelopmentofrotatingmachines,andachievedgoodresults.90stothe20thcentury,castdialysistechnologyresearchanddevelopmenthasbeenfurtherdeveloped.ShenyangInstituteofcastingductileironwithWCand40Crstrengthenedtoincrease3.5times.BeijingUniversityofScienceandTechnologyinthegraycastironingotmoldsurfaceboronizing,FuxinMiningInstituteinthesurfaceofcastductileironhammerandtitaniumvanadizing.Haveincreasedthelifeoftheworkpiece,LiaoningInstituteofMechanicalEngineeringTechnologyXuZhimingandotherschoosetoCrFe,TiFe,VFe,MoFealloy,suchascastironasapercolationagent.Atthesametimeaddingasmallamountofrareearthalloy,canhammertheballthefirstpartoftheformationofthesurfacelayerofinfiltrationcastingalloywhitecastironlayerandcontrollayerofwhitecastironalloycarbidemorphologyanddistribution.Ironsurfaceintheballwas4mmthickwhiteironalloylayerenhancedbytheabrasiveweartestsconfirmedthatthesurfaceofthewearresistanceofductileironis2.01timesNeedtospecificallypointoutthatsincethe20thcentury,sincethe90s,XinjiangInstituteofTechnologypermeabilityofCrcastauseful,valuablediscussion,inordertofurtherimprovethecastlayerthicknessandlayertoretainmoreofthealloyparticlesasahardqualitativephase,withaviewtoimprovethewearresistance,theybothexperimentalandproductionblocksinplaceoftheuseofalloyalloycoatingpaste.Chromizinglayerforthecastiron,castironmadebythefusionlayerCrpermeabilitylayer,brazinglayerandthesinteredlayerconstitutethethreedifferentregions,eachdistinctregionoftheformationmechanismofthenewtheory,thestudyofpeoplewithlesssteelcastinginfiltrationprocessalsocarriedoutresearchchromizingsteellayerformedbyfusion,sinteringlayerconsistingofanewtheory.Theestablishmentoftheprocessfactorsontheimpactofcastalloylayerpermeabilityofonedimensionaldigitalmodel,andverifiedbytests.InadditiontothecastalloylayerpermeabilitycharacteristicsofCrdepthanalysisofthequalityofdialysisanditseffectscastasystematicstudyofthefactors.Theresultsoftheirresearchhasbeensuccessfullyusedforindustrialproduction,brickmakingmachineinthegraycastironmoldsurfaceCr,itsservicelifethantheoriginallifeofgraycastironmaterialisincreasedby810times.Inrecentyears,inordertoobtainthequalityofthecastlayerstability,theeliminationofslaglayerporosity,somescientificandtechnologicalworkerstoavarietyofnewtechnologycastinginfiltration.LeasingCo.,Ltd.ofChinaZhaoJianhuacastingcompaniescastinganegativepermeability.Kevindialysisasaresultofthisprocessdoesnotdependonthebinderalloyparticlesattachedtothemoldsurface,butbynegativepressureintheaboveadsorption,solidcastlayerandthequalityismuchhigherthanthetraditionalmethodofcastinginfiltration.Inadditiontheliterature6throughthevacuumofthetheoryofpercolationanalysisoftheimpactofnegativefactorscastinginfiltrationdepthandshadowlaw.WithWC,aluminaandnickelpackagesfordifferentparticlesizealuminaceramicparticles,heatresistantsteelforcastingnegativematrixpermeabilityexperimentsconductedbytheparticles,suchasNo.4LiuChinascastdialysisRecentresearchcomplexdistribution295materials,revealedandconfirmedthemetalparticlesandthewettingpropertiesbetweenliquidandparticlesontheimpactofthelawofinfiltrationcasting.HuazhongUniversityofScienceandTechnologyunderthegravityfieldfortheperformanceofcastalloyinfiltrationoftheproblems,thedevelopmentofoverweightpermeabilityfieldcastsurfacealloyingtechnology,successfullyusedforgraycastironcruciblesurfacewasdifficulttoobtaintraditionalcraftsofhighalumina,siliconcastlayer.Cruciblelifeandordinarygrayironcruciblematerial3times.Excessoffieldcastalloyhasapermeabilityofmacroandmicroinfiltrationoftheproliferationoftwowaymodelalloys,cansignificantlyenhancethepermeabilityintheprocessofcastingqualityandenergytransfertoovercomethetraditionalgravitycastalloyoftheeffectofinfiltrationofprocessparametersonthesensitivityofstomatalhardinclusionsfrom,AlSicoatingmoltenironofhighpermeabilitydifficultissuessuchas

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