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1、Weldingistoensurethattheshipoftheshipthestrengthofthekey.Thispaperdescribestheshipintheweldingofseveralcommonreasonsftheshtcomingsproposepreventivemeasures.Weldingistoensurethattheshipoftheshipthestrengthofthekeyistoensu

2、rethatthekeytothequalityoftheshipistoensurethesafetyofshipsnavigatingoperatinganimptantconditionf.Ifthereisaweldingdefectitmaycausestructuralfaultsleakageevencausetheshipsank.Accdingtotheshipbrittlefractureaccidentinvest

3、igationshowedthat40percentofbrittlefracturefromtheaccidentwasthebeginningofthewelddefects.Shipsinthetownshipinshipbuildingshiptheweldingqualityisparticularlyprominent.Intheinspectionofshipsintheprocessofweldingthetestisp

4、articularlyimptant.Therefeshouldtheearlydetectionofdefectstheweldingdefectsrestrictedtoacertainextenttoensurenavigationalsafety.Manytypesofshipweldingdefectsaccdingtotheirdifferentpositionsthedefectscanbedividedintoexter

5、nalinternaldefects.DefectshavepesslagweldingcrackslackofperationnotfusionweldshapeofDimensionarenotmetthebitingedgeofweldingsuchasarcpit.firststomatalpestomatalpemeansthattheweldingbubblebathinthesolidificationofthefaile

6、descapetheholefmed.Themainreasontherehavestomata:grooveedgeofdirtywateroilXiujielectrodenotprovisionsofcuringfluxsolderrustceskindegenerationsuchasspalling.Inadditionlowhydrogenweldingelectrodethearcistoolongweldingtoofa

7、stsubmergedarcweldingvoltagetoohighareeasilygeneratedintheprocessofweldingstomata.Becausethepresenceofpositysothattheseamofeffectivecrosssectiondecreasedtoolargepeswillreducethestrengthofweldsthedestructionoftheweldmetal

8、density.Preventionistohaveastoma:choosetherightweldingcurrentweldingspeedgrooveedgetocleanupwateroilXiuji.Strictlyinaccdancewiththeregulationscustodyclearingcuringweldingmaterials.Nottousedegenerateelectrodewhentheskinde

9、generationdrugdiscoveryelectrodespallingweldingcecrosionshouldstrictlycontroltheuseof.SAWshouldusetheappropriateweldingprocessparametersparticularlytheplateautomaticweldingweldingspeedshouldbeassmallaspossibleme.Sendcent

10、slagdiameterthecurrentistoosmalltoofasttoolongarcsoon.Weldmentgroovesurfaceoxidefilmoilsodidnotremovecleanwhenitflowsintheweldingofmetalslaghinderthetransptofthefusionimproperpracticesthearcinthegroovewhilepartialotherre

11、asonswillnotcausetheedgefusion.Preventthelackofperationfusionapproachistherightsizeedgrooveareasonablechoiceofweldingcurrentspeedgroovethesurfaceofskintoremoveoilpollutioncleanbackcoverweldingrootsthoughlytransptoftheswi

12、ngshouldbeappropriatepaycloseattentiontoslopeIfusiononbothsidesofthesituation.fifthweldingcracksWeldingCrackisaveryseriousshtcomings.Mefromthedestructionofthecracksintheprocessofweldingtotakeallnecessarymeasurestoprevent

13、theemergenceofcrackintheweldingusedvariousmethodstocheckfcracks.Foundacrackshouldberemovedthentorepair.Weldingcrackahotcrackcrackcold.Weldmetalfromliquidtosolidinthecrystallizationprocessknownasthecrackofcrackitsacterist

14、icisthatimmediatelyaftertheweldingmeinthecenterseamalongtheseamlengthofthedistribution.Heatcracksthesurfacethroughoutmostofthegapshowingofcolslightlycracktheendofround.Ahotcrackintheweldpoolbecausetherearelowmeltingpoint

15、impurities(suchasFeSetc.).Asaresultoftheseimpuritieslowmeltingpointcrystalsolidifiedthelatestafterthesolidificationofplasticintensityisverylow.BecauseThisinthestructureofbindingstressenoughtheoutsidewldthesolidificationo

16、ftheweldmetalcontractionthepooloflowmeltingpointoftheseimpuritiesinthesolidificationprocesswasstartedshtlyafterbeingopenedcoagulationresultingincracksbetweenthecrystal.Weldingelectrodepiecesofsulphurcopperotherimpurities

17、inalongtimebutalsoeasytoproducethermalcracks.Preventhotcrackthemeasuresareasfollows:1tostrictlycontroltheweldingprocessparametersslowdownthecoolingratetoincreaseweldshapefactasfaraspossibleusingsmallcurrentmultichannelmu

18、ltiweldingindertoavoidweldcracksCentretheotherisseriouslyTheimplementationofapointofderareasonableweldingprocessweldingtoreducestress.Weldmetalinthecoolingprocesscoolingthebasemetalinthebasemetalweldthejunctionofthefusio

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