简介:摘要本文对新型奥氏体耐热钢Super304H(A213-S30432)进行简单介绍,分析了该钢种的焊接性及焊接技术要点,结合我公司的工程实例对焊接该钢种所采取的焊接工艺方法及所遇到的质量问题进行了总结。
简介:Toavoidintergranularcorrosionandobtainmicrostructuralhomogenization,theconventionalSUS304austeniticstainlesssteelneedstobesolutionannealedafterhotrolling.Thisstudyinvestigatesthethermal-mechanicalcontrolledprocess(TMCP)ofSUS304steel,especiallythecontrolledrollingandonlineacceleratedcoolingprocedures.Theobjectiveofthisresearchistoreduceorevenpreventcarbideprecipitationbasedonthedescriptionofthetime-temperature-precipitation(TTP)curve.Thedynamicandpost-dynamicrecrystallizationbehaviorsofthissteelensuredthehomogenizationofgrainsinthisprocessdueto,whichwasstudiedbythehotcompressiontests.ThemicrostructureandthepropertiesoftheTMCP-producedSUS304steelstripwerecomparedwiththeconventionalmethodofsolutionannealing.Basedontheaboveresults,thenewlydevelopedTMCP-producedSUS304hot-rolledausteniticstainlesssteelstriphasbeensuccessfullyproducedanditcanbedirectlyutilizedinthecoldrollingprocesswithoutsolutionannealing.
简介:1.IntroductionInthispaperweconsiderCauchyproblemforaclassofnonhomogeneousNavier-Stokesequationsintheinfinitecylinderwith.Givensatisfyinginthedistributionsensediv,weseekasolutionvectorandapressurefunctionP(t,x)suchthatwhereisanonlinearvector-valuedfun...
简介:银灰,典雅、金属,三大思想圈定了一款笔记本电脑,它像是商务的天使,也是休闲的玩伴。
简介:Inthispaper,asimplebutinherentrelationbetweentheL-integralandtheBueeknerworkconjugateintegralisprovedforcrackproblemsinisotropic,anisotropic,anddissimilarmateri-als,respectively.Itisfoundthat,intheabove-mentionedthreecases,theL-integral,fromthemath-ematicalpointofviewaswellasinprinciple,arisesfromBetti’sreciprocaltheorem.ThismeansthattheBuecknerworkconjugateintegralisamoregeneralpath-independentintegralthantheotherssinceanyotherpath-independentintegralscouldbederivedbyusin8theBuecknerintegralwhilechoosingadifferentsubsidiarystress-displacementfield.
简介:BriefIntroductiontoELTECS-Chi-LELTECS-Chi-LisaBritishCouncilChinainternetdiscussiongroupforChineseELT(Englishlanguageteaching)professionalswithaninterestintheteachingofEnglishasaforeignlanguage.LaunchedinForeignLanguageTeaching&ResearchPressbyHelenaKennedyQC,ChairoftheBritishCouncilon9thOctober1998,thenetworkhasnowover150subscribers,amongwhommorethan40arefromtheUK,Belgium,Japanandothercountries.
简介:L'enseignementdufrancaisniveauⅢYANGHaiyanDans1'enseignementdufrancaisniveauⅢ,nonsavonsprisunsoinparticulieraux3aspects:lechoi...
简介:RosalindBurford:IntroductiontoELTECS-Chi-LIamdelightedtowelcomeyoutoELTECS-Chi-L,anelectronicdiscussionforumforELTprofessionalsinChina.Bytheyear2,000itisestimatedthatonebillionpeoplewillbelearningEnglish.Itisthemainlanguageofbooks,newspapers,internationalbusiness,science,technology,travel,diplomacy,sport,musicandsoon.WhenEnglishissomuchindemanditmakessensetoshareideaswithcolleagues.That’swhytheBritishCouncildecidedtoestablishaninternationalEnglishLanguageContactsScheme-EL-TECSforshort.
简介:Aditerpenoid,neostellerin,wasisolatedfromtherootsofStellerachamaejasmeLtogetherwith4knowncompoundsidentifiedasβ-sitosterol,scopoletin,umbelliferoneanddaucosterol.Thestructureofneostellerin,whichwaselucidatedbyNMR,especially2DNMRanalysis,wasdifferentfromotherdaphnanetypediterpenesisolatedfromthisplant.