A105钢双丝埋弧焊厚板对接试验及测量系统

:2005-06-20A1051,1,2,2(11,200030;21,200092):,A105,,,,,,:;;;:TG434.4:A:0253-360X(2006)08-095-040,,:(1):,(2):,(3):,;,,(4):,,,:,A105(44mm52mm),:52mm,44mm;,,,,,,,,,1,,60,[13],[47],;;,,,27820068TRANSACTIONSOFTHECHINAWELDINGINSTITUTIONVol.27No.8August2006,,A1051;;1Fig.1Schematicdiagramofweldingexperimentalprogramme22.175mVP1000A,1P10,;TektronixTDS220TEKVISA2.252mm,44mm,,,,(NI)Lab2VIEW;TESAGT21AD698NI6013,LabVIEW,PCLabVIEWNI6013,,,200kHz()2.3,,SPIAPDTLC2543,APD20kHz,PRT,VisualC++,8,25mm,,(),,,,2.4,(D=2.0mm,H=2.0mm),,,,,459627,,,3200mm450mm(44mm52mm),U;,H08MnA,2mm,SH250G1:1415,34mm:,,22Fig.2Weldbeadafterwelding1Table1WeldingparametersIPAUPVvP(mmin-1)LPmmv1P(mmin-1)T0P55070044450.60.7452.63.970080045460.50.7453.94.880090047480.50.7454.85.68070080044450.50.6453.94.844.13,;,,3Fig13Waveformsofcurrentandvoltage4.2,4,,,;,,,,,,,,,4Fig.4Measureddisplacementofeverypass8,:A105974.3525mm,,,,,,,,,,525mmFig.5Temperaturedistributionat25mmfromweldcentre4.4,(6)6,,,6Fig.6Distributionofresidualstress5(1),,A105,,(2),(3),,,:[1]HinkelJE,ForsthoefelHingW.Currentdensitysubmergedarcweld2ingwithtwinelectrodes[J]1WeldingJournal,1976,55(5):175-180.[2]PavolBlaskovie,EvaMalinvska,ViliamPavelska.Comparisonofal2ternativemethodsofsubmergedarcweldingandsurfacing[J].WeldingResearchAbroad,1992,38(2):36-44.[3]TusekJ.Metal2powdertwin2wiresubmergedarcwelding[J].Welding&MetalFabrication,1998,66(7):21-241[4].[M].:,19911[5].[M].:,1996.[6].[M].:,19981[7],,,.[J].,2004,5():156-1601:,,19799,,10Email:[e-mail]9827ADSP2basedcontrollerdesignforthree2levelflyingcapacitorinvertweldingsupplyconverterBAIZhifan,YUFanhui,SHENyue,YANGYanjun(CollegeofMaterialsScienceandEngineering,JilinUniversity,Changchun130025,China).p79-82Abstract:Three2level(TL)Pulse2Width2Modulate(PWM)convertershasanumberofapplicationsanddigitalcontrolenhancestheirperformance.AZeroVoltageandZeroCurrentSwitch(ZVZCS)TLDC\DCconverterwasproposedbyusingphase2shiftcontrolwiththeflyingcapacitorintheprimarysidetoachieveZVSfortheouterswitches.Thevoltagevalueoftheswitchesofthethree2levellegisthehalfoftheinputvoltage.Comparedwithotherthree2leveltopologies,theFlyingCapacitorVoltage2SourceConverter(FC2VSC)topologyhasanumberofuniquecharacteristicssuchastheCascadedConverterandtheNeutral2Point2Clampedone.APWMcontrollersuitableforthree2levelflyingcapacitorconverterswasde2signedbyusingapopularTMS320LF2407ADSPboardforimple2mentation.Keywords:three2levelinvertweldingsupplyconverter;zero2voltageandzero2current;flyingcapacitorconverter;DSPJointoptimizationanditsreliabilityanalysisofhanddiskmag2neticheadLIUXiaokang1,YANGShengwen1,JANGChuanwen2(1.CollegeofMechanicalEngineering,SouthChinaUniversityofTechnology,Guangzhou510640,Cnina;2.XinkeDongguancityGuangdongProvince,Dongguan523087,China).p83-87Abstract:Thesolderedjointflawswerestudiedandtheopti2mumsolutionsweregivenonthebaseofclassifyingtheflawsintotwokinds1Forthefirstflaw,theenergycontrolequationwasestablishedtostimulatetheeffectofballsizeandtherelativepositiontothefor2mationofsolderedjointusingtheSurfaceEvolversoftware1There2sultshowsthattheoptimumballsizeis120m5m,andlengthoftheslideredpadtothesuspensionpadDM2Sis2155.0m,thedis2tanceofthesuspensionpadtotheslideredpadDS2Mis2040m1Forthesecondflaw,theAulayerisoptimizedfrom5mto23mandtheleadingwirewasshortentoavoidtheformationofintermetal2licsdepositflaws1Theoptimumresultshowsthatthesolderedjointundergo700circletestcirculate,thepercentofflawsinthesolderjointwasshortenfrom7%8%to0163%1Keywords:SBB(stannumballbonding2SBB);solderedjoint;flaw;sliderpad;ballsizeEffectofrare2earthonmicrostrctureandperformanceofFepowdercoveredelectrodeweldedjointHanYongquan,LiJian2guo,YaoQinghu(CollegeofMaterialsScienceandEngineering,InnerMongoliaUniversityofTechnology,Huhehaote10062,China).p88-90Abstract:AnewtypeofhighefficiencyFepowdercoveredelectrodecontentedrare2earthwasresearched.Byanalysisoffracturesurfaceandmetallicimpurityinweldmetalandimpactcharpytestinlowtemperature,itwasconfirmedthatproperrare2earthcanfinedthecrystallinegrainandpurifiedtheweldmetal.Thecoveredelec2trodecanbeusedtoweldtheimportantstructureandhasgoodtech2nologicalproperties.Keywords:rare2earth;highefficiencyFepowdercoveredelec2trode;mechanicspropertyBondingoftitaniumalloysheetandstainlesssteelwebWANGXiaojun1,2,LIUTianzuo1,2,HEChengdan3(11LaboratoryofNon2ferrousMetalAlloys,theMinistryofEducation,LanzhouUniversityofTechnology,Lanzhou730050,China;2.StateKeyLaboratoryofGansuAdvancedNon2ferrousMetalMaterials,LanzhouUniversityofTechnology,Lanzhou730050,China;3.Lanzhouphysicalinstitute,Lanzhou730000,China).p91-94Abstract:TheseamresistanceweldingandvacuumdiffusionweldingofTi6Al4Vtitaniumalloyand00Cr18Ni13stainlesssteelwithdifferentweldingparameterwereinvestigatedandthemicro2structureofjointswereanalyzedbyscanningelectronmicroscopeandX2rayenergydispersiveanalysis.Theresultsshowedthattheoccur2renceoftensionstressandbrittleintermetallicsphaseareinevitableinjointsandmicrocrackswillbeobserved.Seamresistanceweldingandlowparametercannoteliminatetheweldingdefectsbutdecreasethe