会员注册 | 登录 | 微信快捷登录 支付宝快捷登录 QQ登录 微博登录 | 帮助中心 人人文库renrendoc.com美如初恋!
站内搜索 百度文库

热门搜索: 直缝焊接机 矿井提升机 循环球式转向器图纸 机器人手爪发展史 管道机器人dwg 动平衡试验台设计

外文翻译--船舶焊接.doc外文翻译--船舶焊接.doc -- 5 元

宽屏显示 收藏 分享

资源预览需要最新版本的Flash Player支持。
您尚未安装或版本过低,建议您

Weldingistoensurethattheshipoftheshipandthestrengthofthekey.Thispaperdescribestheshipintheweldingofseveralcommonreasonsfortheshortcomingsandproposepreventivemeasures.Weldingistoensurethattheshipoftheshipandthestrengthofthekeyistoensurethatthekeytothequalityoftheship,istoensurethesafetyofshipsnavigatingandoperatinganimportantconditionfor.Ifthereisaweldingdefect,itmaycausestructuralfaults,leakage,orevencausetheshipsank.Accordingtotheshipbrittlefractureaccidentinvestigationshowedthat40percentofbrittlefracturefromtheaccidentwasthebeginningofthewelddefects.Shipsinthetownshipinshipbuilding,shiptheweldingqualityisparticularlyprominent.Intheinspectionofshipsintheprocessofweldingthetestisparticularlyimportant.Therefore,shouldtheearlydetectionofdefects,theweldingdefectsrestrictedtoacertainextent,toensurenavigationalsafety.Manytypesofshipweldingdefects,accordingtotheirdifferentpositions,thedefectscanbedividedintoexternalandinternaldefects.Defectshavepores,slag,weldingcracks,lackofpenetration,notfusion,weldandshapeofDimensionarenotmet,thebitingedge,ofwelding,suchasarcpit.firststomatalporestomatalporemeansthatthewelding,bubblebathinthesolidificationofthefailedescapetheholeformed.Themainreasontherehavestomatagrooveedgeofdirty,water,oilandXiujielectrodeornotprovisionsofcuringflux,solderorrustcoreskindegeneration,suchasspalling.Inaddition,lowhydrogenweldingelectrode,thearcistoolong,weldingtoofastsubmergedarcweldingvoltagetoohigh,areeasilygeneratedintheprocessofweldingstomata.Becausethepresenceofporositysothattheseamofeffectivecrosssectiondecreased,toolargeporeswillreducethestrengthofwelds,thedestructionoftheweldmetaldensity.PreventionistohaveastomachoosetherightweldingcurrentAndweldingspeedandgrooveedgetocleanupwater,oilandXiuji.Strictlyinaccordancewiththeregulationscustody,clearingandcuringweldingmaterials.Nottousedegenerateelectrode,whentheskindegenerationdrugdiscoveryelectrode,spallingorweldingcorecorrosion,shouldstrictlycontroltheuseof.SAW,shouldusetheappropriateweldingprocessparameters,particularlytheplateautomaticwelding,weldingspeedshouldbeassmallaspossiblemore.Sendcent,slagSlagistheresidueoftheweldslag.Weldslagwillalsoreducetheintensityanddensity.AslagisthemainreasonforWeldaerobiccuttingedgeofgasorcarbonarcshaverresidualslaggrooveangleorweldingcurrentistoosmall,toofastorwelding.Acidintheuseofelectrode,thecurrentistoosmallorbecauseofimpropertransportofapasteresiduetousealkalineelectrode,thearcistoolongorbecauseofincorrectpolaritywillcausetheslag.ASAWbackcover,fromweldingwirecenter,butalsoeasytoslagformation.PreventionSlagproducedthemeasuresareselecttherightgroovesize,tocleanupgrooveedge,choosetherightweldingcurrentandweldingspeed,andtransportoftheswingshouldbeappropriate.Multiwelding,shouldbecarefullyobservedgrooveonbothsidesofmelting,eachlayermustbeweldedtocleanupweldingslag.Backcoverweldingslagshouldbethoroughlyremoved,SAWattentionshouldbepaidtopreventthesolderside.Third,bite–WeldleftedgeoftheDepression,knownasthebitingedge.Abitingedgebecausetheweldingcurrentistoolarge,Yunofthespeedandarcweldingrodstretchedtoolongorinappropriateangle.SAWweldingspeedtoofastorwelderorbitcausesofinequality,willcausethemeltingofweldingtoacertaindepth,andfilledwithmetalalsofailedtofilltheresultingbitingedge.Reducethebitingedgeofthebasemetaljointcrosssectionofwork,therebyresultinginthebitingedgeofstressconcentration,itwasimportanttothestructureorstructureofthedynamicload,isgenerallynotallowedtobiteWhilethere,ortobitedepthlimit.BitepreventionapproachisChoosetherightoftheweldingcurrentandtransportpractices,theattentionofcontrolatanytimearcweldingrodangleandlengthSAWprocessparameterstobeappropriate,withspecialattentiontoweldingspeedshouldnotbetoohigh,weldingmachinetotrackformation.Fourth,lackofpenetration,nofusionWelding,thejointswerenotfullyrootpenetrationofthephenomenon,knownasthelackofpenetrationintheweldingpiecesofmetalandweldseamorapartiallayerofpenetrationphenomenon,knownasFusiondidnot.Lackofpenetrationorfusionisamoreseriousflaw,sincelackofpenetrationorfusion,Weldwillappearintermittentormutation,weldstrengthgreatlyreduced,orevencausecracks.Therefore,inthehulloftheimportantpartsofthestructuredoesnotallowexistenceoflackofpenetration,thesituationisnotfusion.LackofpenetrationandfusionisnotthecauseoftheweldingassemblyspaceorslopeargumentOfsmall,bluntthick,toomuchelectrodediameter,thecurrentistoosmall,toofastandtoolongarc,andsoon.Weldmentgroovesurfaceoxidefilm,oil,andsodidnotremoveclean,orwhenitflowsintheweldingofmetalslaghinderthetransportofthefusionorimproperpractices,thearcinthegroovewhilepartialandotherreasons,willnotcausetheedgefusion.Preventthelackofpenetrationorfusionapproachistherightsizeselectedgroove,areasonablechoiceofweldingcurrentandspeed,grooveandthesurfaceofskintoremoveoilpollutioncleanbackcoverweldingrootsthoroughly,andtransportoftheswingshouldbeappropriate,paycloseattentiontoslopeIfusiononbothsidesofthesituation.fifth,weldingcracksWeldingCrackisaveryseriousshortcomings.Morefromthedestructionofthecracks,intheprocessofweldingtotakeallnecessarymeasurestopreventtheemergenceofcrackintheweldingusedvariousmethodstocheckforcracks.Foundacrack,shouldberemoved,andthentorepair.Weldingcrackahotcrack,crackcold.Weldmetalfromliquidtosolidinthecrystallizationprocessknownasthecrackofcrack,itscharacteristicisthatimmediatelyafterthewelding,andmoreinthecenterseamalongtheseamlengthofthedistribution.Heatcracksthesurfacethroughoutmostofthegap,showingofcolor,slightlycracktheendofround.AhotcrackintheweldpoolbecausetherearelowmeltingpointimpuritiessuchasFeS,etc..Asaresultoftheseimpuritieslowmeltingpoint,crystalsolidifiedthelatest,afterthesolidificationofplasticandintensityisverylow.BecauseThis,inthestructureofbindingstressenoughtheoutsideworldandthesolidificationoftheweldmetalcontraction,thepooloflowmeltingpointoftheseimpuritiesinthesolidificationprocesswasstarted,orshortlyafterbeingopenedcoagulation,resultingincracksbetweenthecrystal.Weldingelectrode,andpiecesofsulphur,copperandotherimpuritiesinalongtime,butalsoeasytoproducethermalcracks.Preventhotcrackthemeasuresareasfollows1tostrictlycontroltheweldingprocessparameters,slowdownthecoolingrate,toincreaseweldshapefactor,asfaraspossible,usingsmallcurrentmultichannelmultiwelding,inordertoavoidweldcracksCentreandtheotherisseriouslyTheimplementationofapointoforder,selectareasonableweldingprocess,weldingtoreducestress.Weldmetalinthecoolingprocessorcooling,thebasemetalorinthebasemetalandweldthejunctionofthefusionlineknownasthecoldcrackcrack.Suchcracksarelikelytoariseimmediatelyaftertheweldingisalsopossibleinafewhoursafterwelding,afewdaysorevenlongerbeforethere.Coldcrackthemainreasonfor1theroleofheatcycle,theheataffectedzonegeneratedHardenedorganizations,2aweldintheexcessiveproliferationofhydrogen,andhasaconcentrationoftheconditions3jointbearBindingagreaterstress.PreventThecoldcrackmeasuresare1choiceoflowhydrogenelectrode,intheweldtoreducethespreadofthecontentofhydrogen,2strictlyabidebytheweldingmaterialselectrode,Fluxcustody,baking,usethesystem,guardagainstexposedtomoisture,3carefullycleaningupslopeIedgeoftheoilpollution,waterandXiuji,toreducethesourcesofhydrogen,4Accordingtomaterialgradesofcarbonequivalent,componentthickness,theenvironment,suchaswelding,areasonablechoiceoftheweldingprocessparametersandenergylines,suchasweldingbeforepreheating,solderAfterthecoldease,takingmultichannelmultiwelding,acertainlevelofcontroltemperature,5aftertheheatemergencyTreatmenttodehydrogenase,toeliminatethestressandtemperhardenedorganizations,toimprovejointtoughness6thereasonableuseofweldingprocedures,theuseofsubretreatlaw,suchaswelding,andweldingtoreducestress.sixth,otherflawsWeldingisalsocommontoanumberofwelding,arcweldingpitandontheexternaldimensionsandshapeofthedefect.Aweldingofthemainreasonsistheunevendistributionoftransport,resultingpooltemperatureistoohigh,theliquidmetalsolidifiedslowlyfalling,thusformedonthesurfaceoftheweldmetalaneurysm.Li,Yangwelding,theuseoftoomuchcurrentandarcwelding,butalsolikelytobeofwelding.Hanggeneratedarcisputoutthereasonsforthearcoftimeistooshort,orweldingsuddenlyinterruptedorwhenthecurrentweldingplatetoomuch,andsoon.Weldingseamsurfaceappearanceofinfluence,andeasytocreatefolderssurfaceJavaarcpitsandcracksareoftenaccompaniedpores,seriouslyweakenedweldingstrength.Preventweldingofthemainmeasurestostrictlycontrolthepooltemperature,Li,Yangwelding,weldingcurrentratioshouldbe1015percentofsmallwelding,theuseofalkalineelectrode,shouldbeusedshortarcwelding,andmaintainuniformityoftransport.Hangpreventarcisthemainmeasuresinhandtoarcwelding,weldingrodshouldstayforashortperiodoftimeorforseveraloftheringshipped.Someshortcomingsoftheexistenceofthesafetyofshipsnavigatingisverydangerous,oncediscovereddefectsshouldbepromptlyamended.Theporosityoftheamendments,particularlyforinternalpores,toconfirmlocation,applicationofwindspadeorcarbonarcshaverclearalltheporositydeficienciesandtoacorrespondinggroove,andthencarryoutweldingtheslag,thelackofpenetration,Fusionisnotthedefect,butalsohavetousethesamemethodofremovingdefects,andtheninaccordancewiththeregulationsforwelding.Forcrack,shouldbecarefullyexaminedbeforethecrack,crackandtheendofThedepth,andtheneliminatedefects.Windshovelusedtoeliminatedefects,cracks,shouldfirstcrackatbothendsofthedrillholeonlytopreventtheextensionofcrack.Boredat812mmbybit,thedepthshouldbemorethancrackdepth23mm.Carbonarcgasplaningtoeliminatecracks,theyshouldfirstcrackatbothendsofarouting,untilthecrackeliminated,thenthewholecrackPaochu.Nomatterwhatmethodtoeliminatedefectscracks,itshouldbeacorrespondinggroove,inaccordancewiththeregulationsforwelding.Welddefectthattheattentionshouldbepaid1Weldingdefects,shouldadoptthesmallcurrent,donotswing,multimultichannelwelding,usedtoprohibitthecurrentWelding2oftherigidstructureoftheWelding,Inadditiontothefirstlayerandthefinallayerofwelding,weldingcanbecarriedoutunderheatafterhammering.Eachfloorfromthearcweldingandarcshouldtrytostagger3requirepreheatingof
编号:201311171702427599    大小:47.00KB    格式:DOC    上传时间:2013-11-17
  【编辑】
5
关 键 词:
教育专区 外文翻译 精品文档 外文翻译
温馨提示:
1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
2: 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
3.本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 人人文库网仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
  人人文库网所有资源均是用户自行上传分享,仅供网友学习交流,未经上传用户书面授权,请勿作他用。
0条评论

还可以输入200字符

暂无评论,赶快抢占沙发吧。

当前资源信息

4.0
 
(2人评价)
浏览:19次
英文资料库上传于2013-11-17

官方联系方式

客服手机:13961746681   
2:不支持迅雷下载,请使用浏览器下载   
3:不支持QQ浏览器下载,请用其他浏览器   
4:下载后的文档和图纸-无水印   
5:文档经过压缩,下载后原文更清晰   

相关资源

相关资源

相关搜索

教育专区   外文翻译   精品文档   外文翻译  
关于我们 - 网站声明 - 网站地图 - 友情链接 - 网站客服客服 - 联系我们
copyright@ 2015-2017 人人文库网网站版权所有
苏ICP备12009002号-5