60焊管第24卷第3期2001年5月ABSTRACTSWELDELPIPEADTUBEVol.24No.3May.2001HuangJzngan(1)Strengthen,Intercourse,CoordinationandPromotetheDevelopmentTogetherLzangAzYu(11)TheProductionandtheDevelopmentoftheWatersupplypipeforCityConstructionFromtheaspectsoftheguality,appearance,environmentprotection,economicanalysisetc.,Thisarti-cleevaluatesthegalvanizedpipe,plasticsteelcomplexpipe,plasticaluminumpipe,stainlesspipeforcitywa-tersupply.Inaccordancewiththereguirementsofthecityconstructionprogramminganddevelopment,itisconsideredthattheplasticaluminumpipeandplasticsteelpipeinsteadofgalvanizationpipeisthetrendofthedevelopment.Theauthoralsogivessomeconstructiveproposalsforreference.SubjectTerms,galvanizedpipecomplexpipestainlesspipecitywatersupplyevaluationZhaoRongbzn,LzGuangjun(14)TheTIGweldingofProtectedTantalum-pipeforsheathedthermocouplesusedincorrosiveenvironmentTheprotectedTantalum-pipeweldingofsheathedtherocoupleswasinvestigatedbyTIG.Theweldingprocessanditskeyparameterswereintroduced.Weldinggualityinfluencedbyprocessingwasdiscussed.SubjectTerms,weldingprotectedTantalum-pipecorrosionHedefuetaZ(18)DesignandResearchforAnAutomaticMIGWeldingMachineofCatalystConverterofAutomobileTwodifferentschemesforautomaticMIGweldingofcatalystconverterofautomobilehavebeencom-paredandanalysed.AdesignofautomaticMIGweldingmachineusedforcatalystconverterofautomobilehasbeensuggestedinthispaper.SubjectTerms,environmentalprotectionautomobiletri-catalystconverterMIGweldingautomaticweldingPLCFangChuCaz(24)ColdCrackAnalysisofLowAlloyHighStrengthSteelWeldSeamHeatAffectedAreaDuringtheweldingoflowalloyhighstrength(X65andabove),thefinecrackoccursintheweld(espe-ciallyinnerweld)andthelowplastichardbricklestructureoccursinthe~eatAffectedArea(~A)some-time.Thisarticlemainlyanalysistheweldcharacterandthecrackproducingmechanism.SubjectTerms,lowalloysteelhighstrengthbrittlenesscrackweldseamHeHong,JzangXzuhan,LzLzng(27)TechnicalDevelopmentoftheInnerpipelineCorrosionInspectionAbroadThi