高強度硼鋼板熱沖壓成形過程及數(shù)值模擬研究.pdf

1、南昌大學碩士學位論文高強度硼鋼板熱沖壓成形過程及數(shù)值模擬研究姓名：王麗敏申請學位級別：碩士專業(yè)：材料加工工程指導(dǎo)教師：周天瑞；王麗娟20110601ABSTRACTABSTRACTApplicationofadvancedhighstrengthsteelintheautomotivemanufacturingfieldisalleffectivevehicletoachievelightweightandimprovevehiclep

2、assivesafetyHotstampingisaadvancednewtechnology、)l，itllspecializedmanufactureforcomplexshapesofhigllstrengthsteelcomponents，andaverysmallbackspringProcessofthistechnologyissheetofthetemperaturerosetoatemperatureabovether

3、ecrystallizationtemperature，andthenmovedtheheatedsheettothemold，formingandquenching，andgettheparts塒mllighstrengthThisprocessisrelatedtothemoldandthesheetmetalheattransfersheetmetalformingandmicrostructurechange，SOtheproc

4、essparametersontherheologicalbehaviorofsheetdiscussestheimpactoflawformingpartofthehotstampingprocessofanalysis，todevelophotstampingprocessHotstampingtechnologythatwillbetterappliedtotheactualproductionisgreatsignificanc

5、eInthispaper，hi曲strengthboronsteelMn2285advancedistheresearchobjectUsingtheexperimentalresearch，theoreticalanalysisandnumericalsimulationmethodofcombining，highstrengthboronsteelinthehotstampingprocessisanalyzedbasedonthe

6、physicaldevelopmentofthermalsimulationexperimentProgram，thesheetisfullyaustenitized，thenthetemperaturedroppedtodifferenttemperature，differentstrainrateontheisothermalsheettensiletestobtainedthetruestressstraincurvesBased

7、onthiscurves，deformationtemperatureandstrainrateontherheologicalbehaviorofsheetmetalandtheregularityareanalyzedBasedontheexperimentalresults，flowstressmodelofhigh—strengthboronsteelinhotstampingisestablishedThehighstreng

8、thboronsteelUshapedpieceofhotstampingprocessWassimulatedbyfiniteelementnumericalsimulationBasedonexplicitABAQUSsoftwareenvironmentseveralkeyissues，suchassheetmetalcontactbetweenthetreatmentanddie，determinationofmaterialp