【9A文】机械类英语论文翻译

【9A文】机械类英语论文翻译

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时间:2019-07-26

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1、【MeiWei_81-优质适用文档】InfluenceofHotPressFormingTechniquesonPropertiesofVehicleHighStrengthSteels(SchoolofAutomotiveEngineering,StateKeyLaboratoryofStructuralAnalysisforIndustrialEquipment,DalianUniversityofTechnology,Dalian116024,Liaoning,China)Abstract:Basedonthecombinationofmaterialssciencea

2、ndmechanicalengineering,hotpressformingprocessofthevehiclehighstrengthsteelswasanalyzed.Thehotformingprocessinclud-ed:heatingalloysrapidlytoaustenitemicrostructures,stampingandcoolingtimely,maintainingpressureandquenching.Theresultsshowedthatmostofaustenitemicrostructurewaschangedintounifor

3、mmartensitebythehotpressformingwhilethesampleswereheatedat900。Candquenched.Theoptimaltensilestrengthandyieldstrengthwereupto1530MPaand1000MPa,respectively,andtheshapedeformationreachedabout23%.Andspringbackdefectdidnothapp-eninthesamples.Keywords:highstrengthsteel;lightweight;hotforming;mar

4、tensiteAsaneffectiveeconomicalenergymeasure,thelightweightdevelopmentdirectionofautomo-bilehasbecomeoneofthemostimportantresearchsubjectsintheautomotiveindustry.Therearethreemajorwaystoachieveautomobilelightweight:optimizingvehicleframesandstruc-tures;makingvehiclebodyorframeofnewandalterna

5、tivematerialstoreducethevehiclemass(Thehighandultrahighstrengthsteelcanbeusedasalternativematerialsbecauseofitsthinnerthickness);adoptingadvancedmanufacturingtechniquesforthesakeofautomobilelightwei-ght,suchasthickness-gradienthighstrengthsteel(HSS)ormetalbasedcompoundplatesbycon-tinuouspre

6、ssingorhotpressforming[1].AlthoughHSShasbeenappliedinsomedomestictopgradevehicles,thekeyproducingtechnologieshavealwaysbeendominatedbyforeigncompan-ies,suchasAcelorCompany,soastoraisetheproductcostobviously.Bydomesticself-designedhotpressformingtechniquesandwater-coolingmould,theautomobileH

7、SScanbeproducedtosubstituteforeignvehicleparts.Ingeneral,withtheenhancementofsteelblank,smechanicalstrength,itsformabilityisworseneddramatically.ItisdifficulttoapplythetraditionalcoldstampingtechnologyintothefieldofpressingHSS.Thus,thehotstampingtechnolo

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