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1、实用文案EffectofPulseElectricDischargingonSolidificationStructureofHighCarbonSteelTangYong WangJianzhong CangDaqiangUniversityofScienceandTechnologyBeijing Beijing 100083ABSTRACT:Pulseelectricdischarging(PED)wasappliedtohighcarbonsteelliquid,andsolidificationstructu
2、reswithdifferentPEDtreatingtimewereobserved.Itisfoundthatcolumnarcrystalareawasreducedanditsgrowthwashindered.Anewmethodtoimprovesolidificationwaspro-posed.ThecolumnarcrystalsweredifferentinlengthatdifferentintervalsandproblemlikefadingstillexistedafterPEDtreatmen
3、t.ThemechanismthatPEDcanimprovethesolidificationstructurewasdiscussedbutitisstillsubjecttoexperimentalproof.KEYWORDS:highcarbonsteel,pulseelectricdischarging,columnarcrystalIntroductionImprovingthe solidificationstructureof theingot, narrowingcolumnarcrystalarea,e
4、nlarging equiaxedcrystalarea and grainrefinement canimprove thequalityofingotsolidification. Therearetwoapproaches:onecategory isthe chemicalmethod, suchasadding inoculation agenttothemoltenmetal; anotherkindis thephysicalmethod, mainlyisthe oscillationmethod, suc
5、hastheuseof electromagneticstirring method, mechanicaloscillation byultrasonic oscillationand intheprocessofcontinuouscasting ofsteelingotmould. Inrecentyears, anewmethodthatPED isappliedtothe solidificationprocess ofliquidmetalto improvingthequalityofsolidificati
6、on, makingthesolidificationstructure refinement toimprovethe mechanicalpropertiesofmetals. Fromthereportsinthe literature,lowmeltingpoint alloy werestudiedbyresearchers[1 ~4], andthePED is applied duringsolidificationprocess. The effectofPED onsolidificationstruct
7、ureofsteel, hasnotbeenreported. UsingthePEDtothe liquidsteelof9Cr2MoV abovethe标准文档实用文案meltingpointisthebiggestdifferencebetween thisstudy and otherstudies, andstudytheinfluenceof thismethod onsolidificationstructureofsteel.1. experimentaldevice andexperimentalproc
8、essThisexperimentwasdoneintheintermediatefrequencyinductionfurnace(500kg)atafactory.9cr2movsteelcomposition(massfraction)isasfollows:C0.85%～0.95%,S≤0.02
