大型核電封頭用鋼20MnNiMo熱塑性變形行為的研究及應(yīng)用.pdf

1、重慶大學(xué)碩士學(xué)位論文大型核電封頭用鋼20MnNiMo熱塑性變形行為的研究及應(yīng)用姓名：王熠昕申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料加工工程指導(dǎo)教師：權(quán)國政20120528英文摘要ABSTRACTLagerforgingsusuallyusedtosigniflcantcarriera11dlargescalestructlJralcomponentsWiththerapiddeVelopmentofourcountr)，economy，electr

2、icpowercons眥ption鏟owthwitheachpaSsingdayNuclearpowerasakindofeconomic，clean，reliablesubstituteene昭yhaSbeenrecognizedintheworldLagerforgingsaLssignificantstmcturalcoInponentsusedinnuclearpowerequipment，tlledemandwillbeget

3、tingbiggerandbiggerButmanylagerfo略ingsusedinnuclearpowerdep9ndonimportation，forresearchesoflagerfo曜ingsbeginlateinourcountⅨthecapacityofequipmentmatmanufacture1agerfo略ingscan’tmeettherequirementInthis、Ⅳay，notoIllythecost

4、isve巧hi曲，butalsobecontrolledbyforeigIlers，eVenteHiblydelayedt量1edeVelopmentofourcount巧nuclearpowerTherefore，improVingmanufacturingc印abilityoflagerfo瑪ingswillbeoneofVer)，urgenta11dimpon肌tmissionstotlledeVelopmentofourcoun

5、tr)rnuclearpower，whichhaSimportantsigIlificallceInthisp印er，weinVestigatedtllenowstresscuⅣeof20MnNiMoatdi婦睹rentdefomationconditions，thesteelusedinlagernuclearpowerheadCombinedwithmethodsofmathematicalanalysis，establishedn

6、owstressmodelsinhightemperatureandmicrostmctureevolutionmodels，Whichcanpreciselyindicatematerial’sthemloplasticdefonIlingbehaViorMeanwhile，theworkabilityof20MI】NiMoindiflj：rentdefomationareaSisresearchedbasedondyn鋤icmate

7、rialmodelOnmebasisofresearch，weshowthen啪ericalsimulationthatcombinedlagernuclearpowerheadf0瑪ingdefomationaJldmicrostrIlctureeVolution，WIlichwillproVidereferenceValueauldspotguidanceforpracticalproductionoflager眥clearpowe

8、rheadT11etmestress—straincurVesof20MnNiMosteels鋤plesatdi行erentdefonllationconditionshaVebeenobtainedbyhightemperaturecompressiontestsontheGleeble1500theHnalsimulationmachine7IⅥodifrerentnowstressmodelshavebeenbuiltontheb

9、asisofSellarsmodel，meparametersVariation蛐eniusa11dLaasraoui謝mtwosegmentnowstressmodelsComparedthemodels，wefoundthat，mecuⅣecalculatedfromthemodelwitht、ⅣosegmentagreewellwiththoseofexperimentSThema)【imumrelatiVee玎0rislesst