基于CA-FE法高溫合金鑄件成形質(zhì)量的CAE仿真.pdf

1、西北工業(yè)大學(xué)碩士學(xué)位論文基于CAFE法高溫合金鑄件成形質(zhì)量的CAE仿真姓名：閆欣申請學(xué)位級別：碩士專業(yè)：機械制造及自動化指導(dǎo)教師：趙志龍20060315ABSTRACTFoundryproductionisanimportantpartofthemachinemanufactureTheamountofcastingoccupiesveryhighProponioninthetotalamountofmachineequipmentsT

2、ogetperfectcastingsthemechanismandthecontroltechniqueofthemicrostructureofcastingsmustbestudiednecontrolofthegrainstructureisofprimaryimportanceinmanysolidificationprocessesofcastings，becausethegrainstructurehasinfluence

3、ontheirmechanicalpropertiesandoperatingperformancesThecorerlutersimulationmethodthatisrisingrecentlyhasbeenpaidmoreandmoreattentionbecauseitcallcounteracttheexperiment—basedmethod’sweaknessesIntllisthesisthephysicselemen

4、tsoftheCAEsimulationofthecastingsolidificationhavebeendiscussedFurthermore，thenucleationmodel，thegrowthkineticsmodelofthedendritictipandthepervasionmodelofsoluteforthemicrostructuresimulationhavebeendiscussedBesidestheme

5、thodofsimulatingthetemperaturefield，themodelcouplingthesimulationofmacroscopicandmicroscopicviewandthemethodcombiningthedeterministicmodelingandthestochasticmodelinghavebeendiscussedBasedontheCAFEmethodtheCAEsimulationof

6、thesolidificationhasbeendoneforsuperalloyK4169cylinderingotsandaeroenginesuperalloyK4169castingsThesolidificationtemperaturefieldandthegrainstructurefeaturesandthemicrostructurehavebeengetbycouplingthesimulationofmacrosc

7、opicandmicroscopicviewandcombiningthedeterministicmodelingandthestochasticmodelingUsingFDMmethod，thetemperaturevarietyonacrosssectionofsuperalloyK4169cylinderingotshasbeensimulatedandthetemperaturevarietycurvehasbeendisp

8、layedUsingthefiniteelementanalysissoftwareANSYS，thetemperaturefieldofsuperalloyK4169cylinderingotshasbeensimulatedandthetemperaturevarietycurvesofrandomthreepointsonthesectionhavebeendisplayedWjcallseethatthethreecurvesn

9、earlysuperposeandagreewellwiththecalculatedresultsbvtheFDMmethodAndthesimulatedresultsagreewellwiththemeasuredonesTheseresultsshowthatthetwomethodsarecorrectandattestthattheassumptionthatthetemperatureonthesectionofsuper

10、alloyK4169cylinderingotsishomogeneityThen，Usingthefractionofsolid，thesimulationoftemperaturefields，thenucleationmodelandgrowthkineticsmodelofthedendritictipwerecoupledtocalculategrainstructurefeaturesofsuperalloyK4169cyl

11、inderingotsThecalculatedresultsagrecwellwiththemeasuredonesBasedonatwodimensionalCellularAutomatontechniqueandthegrainstructurefeaturesofsuperalloyK4169cylinderingotsthemicrostructureofthestudiedsectionhasbeenachievedbyc

12、ombiningthedeterministicmodelingandthestochasticmodelingThesimulatedresultsagreewellwithexperimentalobservationUsingFEMmethod，thetemperaturefieldofaeroenginesuperalloyK4169castingshasbeensimulatedbythesoftwareANSYSandthe