搜索
,,,(,100083):,,,,:;;;;:TG44:A:0253-360X(2003)03-87-040,,,,,:;;,,,,,[1]:2002-07-15:(59875003),120,2050,WatanabeMSatohK[2],,2070,TaniguchiC[3],PatteeFM,1976,SatohK[4],KarlssonL[5]MasubuchiK[6]McDillJMJ[7],,TengTL[8]T,,,24320036TRANSACTIONSOFTHECHINAWELDINGINSTITUTIONVol.24No.3June2003,,UedaY[9]DaniewiczSR[10],,,LuoY[11],,,,MyoungSH[12],,,2080,[13,14],,[15],[16]2,,GoglioL[17],,2.1,,,,,2.1.1(1),,,Lagrange,[18]:dij=deij+dpij+dTij(1)(2),,(3),,(4),,,2.1.2(1),,,(2),:{d}=[Dep]{d}-[Cth][M][T],(2):[Dep];[Cth];[M]2.1.3,8824,,2.2,,,,,,,,,,,,,,,:,{X}=[x,y,z]T,{}=[x,yxy]TV,{e3x,e3ye3xy}{X},:{}={R3(V,{e3},{X})},(3)[19]2.3,,,2.3.1MichalerisP[20],(di,1),2.3.21Fig.1OptimizeforthermaltensioningprocessTsaiCL[21],,,T,R(2)R=m/,(4):m;2Fig.2Definitionofjointrigidity,,,,,,2.4,,,,BP(backpropa2gation),,[22],,3,:89462BP,3,ITSW,6,2,3Fig.3ModelofANN,,3,,,,,,:[1]MurakawaH.Computationalweldingmechanicsanditsinterfacewithindustrialapplication[A].InternationalSymposiumonTheoreti2calPredicationinJoiningandWelding[C].JWRI,1996,231244.[2]WatanabeM,SatohK.Fundamentalstudyonbucklingofthinsteelplateduetobead-welding[J].JournalofJapanWeldingSoci2ety,1959,27(6):1320.[3]TaniguchiC.Out2of2planedistortioncausedbyfilletweldsinalu2minum[D].Mastersthesis.MIT,Cambridge,Mass,1972.[4]SatohK,TerasakiT.Effectofweldingconditionsonresidualstressdistributionsandweldingdeformationinweldedstructuresmaterials[J].JournalofJapanWeldingSociety,1976,45(1):4253.[5]KarlssonL,JonssonM,LindgrenLE,etal.Residualstressesanddeformationsinaweldedthin-walledpipe[J].PressureVesselsandPipingDivision,1989,173(7):2327.[6]MasubuchiK.Predictionandcontrolofresidualstressesanddistortioninweldedstructures[J].WeldingResearchAbroad,1997,43(6-7):216.[7]McDillJMJ,OddyAS,ReedRC.Predictingresidualstressanddis2tortionwhenweldingaeroenginealloys[J].CanadianAeronauticsandSpaceJournal,1998,44(2):6872.[8]TengTL.AnalysisofresidualstressesanddistortionsinT2jointfilletwelds[J].InternationalJournalofPressureVesselsandPiping,2001,78(8):523538.[9]UedaY,MaNX.Expressionofinherentstraininformoffunctionanditsestimation[J].JournaloftheJapanWeldingSociety,1993,11(1):189198.[10]DaniewiczSR,McAninchMD,McFarlandB.Applicationofdistor2tioncontroltechnologyduringfabricationoflargeoffshorestructures[C].Proc.ofAWS/ORNLInternationalConferenceonModelingandControlofJoiningProcesses,1993.[11]LuoY.MulakawaH,UedaY.PredictionofweldingdeformationandresidualstressbyelasticFEMbasedoninherentstrain(Report)[J].Trans.JWRI,1997,26(2):4957.[12]MyoungSH.Fundamentalstudiesonweldinginduceddistortioninthinplates[D].Ph.D.Thesis,OhioStateUniversity,Columbus,O2hio,USA,2002.[13],,.[J].,1996,18(1):5056.[14],,,.[J].,1994,28(6):5965.[15].[C].:,1998.3138.[16],,,.[J].,2000,11(2):201205.[17]GoglioL,GugliottaA,pasquinoD.Weldingdistortionofaluminiumstructuralmembers[C].MaterialScienceForum,1996,217-222:17391744.[18]JeongKH.Studyofnumericalmethodologiesformulti2passweldinganalysis[D].Ph.D.Thesis,OhioStateUniversity,Colum2bus,Ohio,USA,1996.[19]KarlssonL.Modelinginwelding,hotpowderformingandcasting[M].ASMInternational,MaterialsPark,Ohio:1997.[20]MichalerisP,DantzigJ,TortorelliD.MinimizationofweldingresidualstressanddistortioninlargeStructure[J].SupplementtotheWeldingJournal,1999,78(11):361366.[21]TsaiCL,ParkSC,ChengWT.Weldingdistortionofathin2platepanelstructure[J].WeldingJournal,1999,78(5):156165.[22],,,.[J].,2002,23(1):2729.:,,1971,CAE8Email:xuezming@vip.sina.com9024Keywords:weldingsolidificationcrack;temperaturefield;numericalsimulation;posttreatmentSulfidestresscrackingofX70pipelinesteelsLIYun2tao,DUZe2yu,TAOYong2yin,XIONGLin2yu(SchoolofMaterialScienceandEngineering,TianjinUniversity,Tianjin300072,China).p7678,86Abstract:TheX70pipelinesteelswithdifferentchemicalcompositionsandweldswerediscussedinthispaper,theeffectofstressrelievingbyan2nealingonresistanceofSSCC(SulfideStressCorrosionCracking)wasalsostudied.TestingresultsrevealedthatthepropertiesofSSCCforpipelinesteelsaremainlyinfluencedbyMnP,notbyC.ItsuggestedthatMnPplayakeyroleinresistanceofSSCCproperties.WiththeincreaseofMnandPcontents,notonlythemicrostructureformedatlowtemperatureandinclusionswillin2creasebutalsotheintegrationofhydrogenatomswillbeinhibited,leadingtohydrogenembitterment.AllthesefactorswilldecreasetheresistanceofSSCCofthepipelinesteelsinmediumincludingH2S.Moreover,stressrelievingbyannealingcanimprovetheresistanceofSSCCforpipelinesteels.Keywords:X70pipelinesteels;weld;SSCC;inclusionsPWMwirefeedertimingsysteminCO2arcweldingmachineYEZhen2zhong,WANGYun,YANGYu,ZHAOBin(Mechano2electronicFacto2ry,TianjinUniversity,Tiaojin300072,China).p7981Abstract:TakingadvantageoftheSG3524chipasortofwirefeedertimingcircuitoftheCO2arcweldingmachinewasdesigned.TheSG3524isakindofspecialPWMchipwithfineperformanceandmostincommonuse.Throughitwecancontroltheon2offofthewirefeeder,negativefeedbackofthearmaturevoltageandadjustthespeed.Comparedwiththetraditionalsili2concontrolledrectifiertimingcircuit,thiscircuithasmoresimplestructureandbettertimingperformance.Bytheexperimentsofelectric2networkvoltagefluctuatiuon