UL7005锅炉焊缝裂纹产生的原因及其处理

:1999-10-08;:2000-01-03:(1963-),,,.:1001-2060(2000)05-0573-02UL7005锅炉焊缝裂纹产生的原因及其处理(,510080):分析了德国UL7005型蒸汽锅炉运行过程中焊缝产生裂纹的原因,制订出返修方案,并提出了防止裂纹产生的对策:;;;:TK228:A1UL7005(1),1998615,,,,400mm,220mm,180mm,5mm400mm,(130mm,170mm),2~3mm,700mm,22mm(1)1LOOSUL-7005198219837t/h1.00MPa0.88MPa2,,:(1),,(2),(3),,,,(4),,,,,,,,,,,,,33.1(1)[1996]276(2)(JB1613-83)(3)(JB4730-94)3.2,,,,1(a)15(89)20009:图1焊缝裂纹示意图(1),图2坡口及补板装配示意图(2)2!V∀30#(3)=165mm,H∃,H∃=18mm20g(4),2!V∀30#(5)2,(6),,:::H08Mn2Si,3mmI=70~80AV=12VL=7~9L/min:E5015(507),32mm;380%~400%,2I=100~120AV=23~25V(7)160%~200%,,,,(8),,(9),200mm,110V,,(300&10)%,15~20,,100%,DWK-A,(10)(11),137MPa,,4(1),,3,,图3冲压成型管板结构及对接焊缝示意图(2),,,,,(3),,,,,1999,,(复编辑)∋574∋2000ofthesteamguidepipesbetweentherearplatenandthefinalstageofthesuperheatershouldbechangedtoaparallellayout.Keywords:temperatureexcursionfactor,reheater,superheater,intermediateheader=ExperimentalStudyofHeatTransferIntensificationforaWatercooledShellandtubeOilCooler[,]/ZhangZhengguo,LinPeisen,WangShiping(SouthChinaUniversityofScienceandTechnology,Guangzhou,China,PostCode:510641),HisaoShibuya(KamuiCo.Ltd.,Japan)//JournalofEngineeringforThermalEnergy&Power.-2000,15(5).-564,566Onthebasisofanexperimentalstudyacomparisonwasmadeoftheheattransferandpressuredropperformanceofthefollowingtwotypesofoilcooler,thepetalshapedfinnedtubecoolerwithhelicalbafflesandlowfinnedtubecoolerwithhelicalbaffles.Theresultsofthestudyshowthatthetotalheattransfercoefficientofthefirstnamedoilcoolerishigherthanthatofthesecondnamedonebymorethan10%withthepressuredropoftheformerabout46%lowerthanthatofthelatter.Keywords:helicalbaffle,petalshapedfinnedtube,lowfinnedtube,oilcooler=TheApplicationofNewEnergysavingTechnologyonanIndustrialBoiler[,]/WangBaoming,DongAigou,XuGuoxiang(AnyangCigaretteFactory,Anyang,Henan,China,PostCode:455004)//JournalofEngineeringforThermalEnergy&Power.-2000,15(5).-565-566AnanalysiswasconductedofthecauseofhighenergyconsumptionSufferedbya10t/hindustrialboiler.Onthisbasis,technicalmodificationaimedatenergysavingswasdecidedonandcarriedout.Someeffectivemeasuresfortappingthefullpotentialofenergysavingshavebeenpinpointedforsmallandmediumsizedindustrialboilers.Inaddition,summarizedalsoaretheeconomicbenefitsfollowingtheimplementationofthetechnicalmodification.Keywords:newtechnology,energysavingtechnology,industrialboiler=MeasurementoftheWaterLevelofaNavalMainBoiler[,]/LiLaichun,ZhaiGuochen,WeiShaojie,etal(HarbinNo.703ResearchInstitute,Harbin,China,PostCode:150036)//JournalofEngineeringforThermalEnergy&Power.-2000,15(5).-567-570Duringtheoperationofanavalmainboilerthemeasurementoftheboilerdrumwaterlevelisdifferentfromthatofalandbasedboiler.Thiscomesaboutbecauseanavalboilerhastooperateundertheinfluenceofsuchfactorsasnavalvesselswingandpitching,etc.Moreover,theeffectofshipnavigationconditionsmustalsobetakenintoaccount.Toillustratethispoint,theauthorshaverecommendedamethodspeciallydevisedformeasuringthedrumwaterlevelofanavalboiler.Keywords:navalboiler,waterlevelmeasurement,nonlinearcorrection=RepairofaReinforcedribCrackinaMarineMainPropulsionGasTurbine[,]/LiuZhonghua,XueYankun(HarbinNo.703ResearchInstitute,Harbin,China,PostCode:150036)//JournalofEngineeringforThermalEnergy&Power.-2000,15(5).-571-572AfulllengthcrackhasoccurredonanimportedAmericanmademarinegasturbine.Withthestructuralfeaturesofthecracklocationandtheweldingtechnologyoftherepairprocessbeingfullytakenintoaccountaproperrepairschemewasadoptedalongwithallnecessaryprotectionmeasures.Thishasresultedintheachievementofasatisfactoryweldquality.Keywords:marinegasturbine,crack,hightemperaturealloy,gasshieldedweldingUL7005=TheCauseofWeldCrackFormationonaModelUL7005BoilerandItsSolution[,]/LiaoDiyu(GuangzhouCityMunicipalInspectionInstituteofBoilersandPressureVessels,Guangzhou,China,PostCode:510080)//JournalofEngineeringforThermalEnergy&Power.-2000,15(5).-573-574AnanalysiswasconductedofthecauseofweldcrackformationonaGermanmadeModelUL7005steamboilerduringitsoperation.Arepairschemehasbeenworkedoutwitheffectivemeasuresbeingproposedtopreventtheformationofanalogouscracksinthefuture.Keywords:weld,crack,analysisofcauses,weldrepairtechnology∋583∋5