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1、Usethanbyweldingmaterialsoflowmeltingpointmetalmeltingpointsolder,afterheatingthesoldertomelt,bycapillaryactionwillsolderinhaledintotheclearancejointinterface,wettingthemetalsurface,formedbetweenthesolidphaseliquiddiffusionbrazingweldinghead.(4)studweldingThestudendwiththepane
2、l(orpipe)electricarcsurfacecontact,afterwaitingforthecontactmelting,addsomepressureonstudweldingmethod.LNGtopmoistureprooflayerplatelateralpegtoweldingalotofconcrete.Adoptthemethodofstudweldingcanimproveefficacyofmorethantentimes.(5)otherweldingmethodsElectronbeamwelding,laser
3、welding,flashbuttwelding,ultrasonicwelding,frictionwelding,theexplosionwelding,electroslagwelding,highfrequencywelding,gaswelding,pressurewelding,coldwelding,diffusionwelding,etc.Second,theweldingprocedurequalification(a)weldingprocedurequalificationanditsfunctionInproducts:1.
4、Theweldingprocedurequalificationbeforewelding,theweldingprocessofpreliminarytoformulatedetailedrulesforthecardorotherdisciplinesintheweldingprocessforconfirmatorytest.Bypreparingtheweldingprocess,closetotheactualproductionconditions,madefrommaterials,processparametersandthesam
5、esimulationweldingtestplateproducts,andaccordingtotheproducttechnicalconditionsonthetestplates.2.Ifalltherelatedindexesaccordwithtechnicalrequirements,thenprovetoweldingprocessisfeasible,atthistimecanbeformalweldingprocessaccordingtotheweldingprocedurequalificationreportdetail
6、edrulesforthecard,toguidetheactualweldingproducts.3.Ifthereisaninspectionitemsindexofunqualified,suggeststhattheweldingprocesscannotbeusedinproduction,needtomakecorrespondingmodificationorrenegotiatedlater,againtodoweldingprocedurequalificationtest.4.Weldingprocedurequalificat
7、ion:usedtoverifyandassessthecorrectnessoftheweldingprocess,theassessmentreportisnotdirectproductiondirectly,isweldingprocessconditionssupportingdocuments(card),thesameweldingprocedurequalificationreportcanbeusedasthebasisofafewweldingprocesscard.7P059(2)theweldingprocedurequal
8、ificationAccordingtothespecificrequirementsofdifferentproduct
