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ID:36640785
大小:2.26 MB
页数:59页
时间:2019-05-13
《高强度船体钢及其超细晶强化工艺研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、上海海事大学硕士学位论文高强度船体钢及其超细晶强化工艺研究姓名:芮孟暧申请学位级别:硕士专业:船舶与海洋工程指导教师:顾卓明;陈小虎20060801本不增加,少用台金资源和能源,塑性和韧性基本不降低条件下,强度翻番和馒用寿命翻番,箕核心理论籀技术就是实现钢材的越纲晶。本文奔绣了获取超细纯晶粒的方法,并对徽合金钢热机械加工结合再结黼处理的新工苗组合,生产的超细晶结构钢进行了分析和研究,其优良麓往大大超过提燕戏俊戆镞舍金镪。鼷诗在麓照、石漕平台等缎稳镊中壤发鬻重要俘爆。关键词:高强度船体结构钢,性能,微合金化,洁净化,超细晶ABSTRACTTherapiddevelopmento
2、fshippingindustry,especiallyship’stonnagebecomemoreandmorebig.therequirementofhighstrengthhullstructuraIsteeIhasbeenahugeincrease.whichmakesagoodmarketprospecttoresearchThispaperstudiesfhemicro-alloyedandgrainrefinementofhighstrengthhulIstructuraIsteeIasviewedfromstrengthandfoughnessmechani
3、smbesidedescribinglhepropertiesofhighstrengthhulIstructuraIsteeI.Intermsofcharacteristicofmicro—alloyedelements,suchasNi,VTi,itcansynthesizecarbidenitridesandcarbonitrides.TheactionofthesecompoundisasfoIlows,1.obstructoriginalaustenitegraintogrowup2,restrainrecrystallduringrolling3.1eadtopr
4、ecipitationstrengtheninginlowtemperature.Theprincipleofsteelstrengtheningi8duetofinegrains.precipitationstrengtheningandsolutionstrengtheningbyaddingalloyedelements.Thegrainrefinementstrengtheningnotonlyenhancesstrengtheningofsteel.butimprovestoughnessandplastic.Thispaperanalysisandsummariz
5、esfheinfluenceofimpuritye[emenfsformechanicalproperties.JtmostlydependsonchemicalcompositionandmechanicaItissuesofsteel.non。metallicimpurityandgas.whichdestroyfhecontinuityofbasemateriaIofsteelandmakeasymmetryjnmechanicaItissues.therebyreducingobdurabilityandfatigueofsteel.Thekeypointwhichi
6、nfluencesmechanicaIpropertiesjscleannessofsteel.Itisveryimportantroutetojmprovepropertiesofsteelthatthetechnologyisintroducedsuchaspretreatmentofmoltenironandrefinementoutsidefurnaceinsmeltprocess.ThispaperanalysisandstudieschemicaIcomposition.microstructure,mechanicalpropertiesofhighstreng
7、thhulfstructurafsteefwhichisfromBaosteel.Aflcharacteristicparametersofthetrial—productionaresatisfactorylomeefrequirementofcriterionorstandard.Itiswellknownthatweldabilityisveryimportanttohighstrengthhullstructuralsteel.Ascanbeseenfromtheresultsoftesting
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