火力发电厂高温过热器爆管分析

1420027()JOURNALOFGUANGZHOUUNIVERSITY(NaturalScienceEdition)Vol.1No14July2002:1671-4229(2002)04-0088-03(,510160):3,,.,,.:;;;:TM621.2:A3#,220th-1,1992.2001625,34,12Cr1MoV,425,53700h.11.1,73mm,4mm,,.,,,,,1.1Fig.1Theburstingcrackform1.2,1.1,GB5310-85.1Table1Theresultsoftubechemicalanalysiswt.%GB5310-85C0.130.080.15SiMnSPCrMoV0.250.540.0100.0161.050.270.260.170.370.400.700.0350.0350.901.200.250.350.150.301.3,2.,,.2Table2Theresultsoftubemechanicaltestingb/MPas/MPa(%)140529026244032028GB5310-85470.4637.0254.8211.4:2002-04-12;:2002-04-27:(1966-),,;:.,:+,8[1],3[1],4[1],234,,.5,.,,,.,,,.,,,,6,.2400Fig.2Theinnerarclocationstructure4003400Fig.3Theneutrallocationstructure4002,GB5310-85,.GB5310-85,,,,.4400Fig.4Thecreepcavitiesnearburstingcrack4005400Fig.5Nooperationoriginalstructure400640Fig.6Thecrackformnearburstingcrack40,,,,,,,.,,.984:,,,.33#,,,,,,.:[1].[M].:,1979.WUFei-wen.High-temperaturemetaloperationofthermalpowerplant[M].Beijing:WaterConservancyPowerPress,1979.[2],,,.[A].[C].:,2000.147-153.ZHAOYan-fen,YANGBai-xun,LIANGChang-qian,etal.Failureofhigh-temperaturepipingbendinpowerplant[A].Collectionoffailureanalysisandallprocessageofapersonadministration[C].Beijing:ChinaPowerPress,2000.147-153.AnalysisontheHigh-temperatureSuperheaterTubeBurstinginaThermalPowerPlantZENGCheng-guang(GuangzhouPowerPlant,Guangzhou510160,China)Abstract:Thetubeburstingreasonsforthehigh-temperaturesuperheaterofNO.3boilerintheplantwereanalyzedbymeansofchemicalanalysis,mechanicaltestingandmetallographicexamination,andthetestresultsshowedthattheo2riginaltubematerialsatisfiedthedesigndemand.Inthemetallographicexamination,manycreepcavitiesandmicro-crackswereobservedintheburstingtube,henceitwasconcludedthattheburstingwascausedbythecreepembrittle2mentresultingfromhightemperatureandbow-shapebestpullstress.Keywords:high-temperaturesuperheater;tubebursting;high-temperaturecreep;thermalpowerplant:09()1