大型工程鋼結(jié)構(gòu)焊接質(zhì)量控制因素研究.pdf

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3、ame：Instructor：Essentials’researchingofweldingqualitycontrolofthelarge—scalesteeIstructuremanufactureMechanicalEngineeringYuanzhao(s咖咖吶坦竺些XuXueli(signature)必巡d：BiZongyue(signature)甾i逝4Z吵AbstractWiththeeconomicconstructio

4、nofChinaturnsintoarapiddevelopmentphase，meanwhile，mostengineeringstructureshavebeingexperiencedcomplexandlarge—orienteddevelopmentTheweldingquali鑼becomesfocalpointwiththeextensiveapplicationofthesteelstructureObviouslyth

5、eweldingshallbehighquality；otherwise，largelosswouldbecausedbytheweldingdefectsduringtheservice。Althoughthemodemweldingtechnologycouldprovideagoodweldingqual塒inasignificantmeasure，butwecouldn’tgethundredpercentdefectfreew

6、eldingjointsduringtheconstructionprogressbecauseofthecomplicateddistributionofstressandmetallographicstructure；furthermore，wecouldn’tavoidDewdefectappearsduringtheserviceofthesteelstructureTheonlywayoutiscontroltheweldin

7、gprocessandprogressstrictlySOthatwecallgetqualifiedweldingjointsneweldingqualitycontrolsarecomposedofthreephases，iepreparationbeforeweldingcommencement，qualitycontrolduringweldingandqualityinspectionafterweldingcompletio

8、nEveryphaseincludesseveralworkingproceduresandbaseontherelativequalityrequirementsastothequalitycontrolduringwelding，thekeyfactorisallpeopleinvolved，allthesepeopleshallcarryoutallrelatedactivities，suchasweldingandinspect

9、ionaccordingtotherequirementsofqualitycontroldocumentsstrictly；atthelastphaseofweldingqualitycontrolisNDE(Non—DestructiveExamination)，thatisthecriticalpartoftheweldingqualitycontrol；meanwhile，thearticleintroducethecatalo

10、gsofweldingdefects，thereasonandpreventionmeaslesoftheweldingdefectsTheonlywaytodecreaseandterminatetheweldingdefectsisfullyunderstandwhatcausestheweldingdefects，SOthatwecanimprovetheweldingqualityItturnedoutthat、析t11thed

11、evelopmentofnewtechnologies，operators’skill，weldingprocess，eqmpment，weldingconsumablesandinspectiontools，peoplewillwell—knowhowtocontroltheweldingqualityeffectivelyandget11igh—qualityweldingproductsKeywords：SteelStructur