铸造流程提示建议.doc

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1、FMOptimizedcastingprocessworkinstructionsforfullrangeofcurrentbrakedrums&rotorsScope:Thisworkinstructionisapplicableforthefullrangeofrotors&brakedrumscastingsprocuredbyFederalMogul.BasedonextensiveprocessoptimizationworkcarriedoutbyFederalMoguloncastingparametersreq

2、uiredforconsistentqualityofcastingsforrotorsandbrakedrumsandforensuringhighprocesscapabilityfortensilestrengthandhardness,theCarbonEquivalenthasbeenidentifiedasoneofthecriticalparameterscloselyrelatedtotheweightrangeofthecasting.TheentirerangeofFMrotorsandbrakedrumc

3、astingsarethereforedividedintoweightgroupswithspecifiedchemistriesofthecriticalelementsinfluencingthemechanicalproperties・Recommendedchemistriesofcriticalelementsandmeltandpourtemperaturestobevariedaccordingtotheweightgroupofthecastings:WeightGroupsTargetChemistries

4、MetalTemp.°CCarbonSiliconChromiumCECopper1-5Kg15401440FurnaceLadle3.35-3.453.25-3.501.63-1.731.88-1.980.15-0.25Max4.1430.18-0.225-11Kg15301430FurnaceLadle3.30-3.403.20-3.451.63-1.731.88-1.980.20-0.300.18-0.2211-17Kg15201420FurnaceLadle3.25-3.353.15-3.401.63-1.731.88

5、-1.980.20-0.300.20-0.2517-30Kg15101410FurnaceLadle3.20-3.303.05-3.351.58-1.681.83-1.930.25-0.350.20-0.25Over30KgPlusALLDuallies15101410FurnaceLadle3.20-3.303.05-3.351.58-1.681.83-1.930.25-0.35Min3.5770.25-0.30Thetarget%forallotherelementsinthiscastironarethesamefora

6、llweightGroupsandareasbelow:Manganese:0.62-0.68Phosphorus:<0.15Sulfur:0.06-0.10Molybdenum:<0.1Nickel:0.02-0.15Titanium:<0.03NOTE:CarbonandSulfurarebasedonThermalAnalysisfortheFurnaceChemistryandonLECOTypedeterminatorforthefinalLadleandCastingchemistryAllotherelement

7、sarebasedonSpectrometerreadingsChargemakeupScrapChips:60%(nochipscanbeusedinCupolamelting,andhencethepigironandsolidscrapmustbeincreased)SolidReturns:15%ScrapSteel:10%PigIron:15%SiC(Si:55%,C:38%):0.2%FeCr&Cu:CalculatedformeantargetpercentageingroupFerrosilicon&Ferro

8、manganese:SettheweightaccordingtotherawmaterialandadditionsintheChargemake-up.Inoculants:0.4%(inladle)+45gmantimony(Sb)ifrequired(Sncanals