齒輪軸熱鍛組織與流動(dòng)形態(tài)模擬及模具磨損分析.pdf

1、山東大學(xué)碩士學(xué)位論文齒輪軸熱鍛組織與流動(dòng)形態(tài)模擬及模具磨損分析姓名：馮超申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料加工工程指導(dǎo)教師：王廣春20110420ABSTRACTABSTRACTGearshaftisasignificantcomponentwithhightransmissionefficiency，compactnessandlonglifeCurrentlythemachiningprcudingmethodhasbeengradual

2、lyreplacedbytheadvancedgearshaftpreciseforgingprocesswhichachievedgoodresultsToeffectivelysatisfytheworkrequirementofthegearshaft，mechanicalpropertiesanddimensionprecisionofforgingsshouldbeimprovedWiththeensuranceofthege

3、arshaftforgingformability，thefineandhomogeneousmicrostructurewouldimprovethemechanicalpropertieswhileimprovingtlledie—wearresistancepropertywouldincraesethedimensionprecisionAccordingtotheFEMsimulationofthegearshaftformi

4、ngprocess，thematerialflowing，temperature，stressandstrainfieldwerecalculatedCombinedwithvariousmodels，thedistributionsofmicrostructureevolutionanddieweal“wereobtainedThesinglestepandmultistephotforgingprocessesofgearshaft

5、weresimulatedusingtheDeform3DFEMsoftwareAccordingtorecrystallizationformulasofYadamodel，theinfluencesofinitialbillettemperature，frictionconditionandpunchspeedonthemicrostructuredistributionwereanalyzed，andthemicrostructu

6、reevolutionsoffourformingprocesseswerecomparedWiththeFlownetmoduleofDeform一3D，theshapesofforgingflowlineweresimulatedToimprovethematerialflowuniformity，localcoolingmethodwasproposed，andthematerialflowconditionsweresimula

7、tedBasedonthedevelopmenttheadvancedArchardmodelWasintroducedinDeform3DtOcalculatetlleinfluenceonthediewearofthedifferentprocessparameters，andthedieweardistributionoffloatingdieWascalculatedTosumup，themultiformingprocessW

8、aseffectiveinimprovingthemicrostructuredistribution，flowlineshapesanddie—weardecreaseHotforgingexperimentsofgearshaftwerecarriedout，metallographicalphotosandflowlinespecimenswerepresentedtoverifythereliabilityofsimulatio