超超临界电站锅炉小径管焊缝超声波探伤

2011333(福建省第一电力建设公司金属试验室,福州350001):对T91材质的电站锅炉小径管焊缝进行了超声波检测,使用常规探头以及试块来调节扫描声速:电站;锅炉;小径管;T91材质;超声波检测:TG115.28:B:10006656(2011)03006303UltrasonicTestingoftheWeldsofSmallCaliberTubeintheUltraSupercriticalPowerStationBoilerZHUJian(FujianNo.1ElectricPowerConstructionCo,Fuzhou350001,China)Abstract:TheultrasonictestingwasdonetotheweldsofsmallcalibertubeofT91materialinthepowerstationboiler,andthescanspeedwasadaptedbynormalprobe.Keywords:Powerstation;Boiler;Smallcalibertube;T91material;Ultrasonictesting660MW,100%T91,38.1mm7.5mm;63.5mm10mm,57mm9mm;51mm8mm,57mm9mm;45mm6.5mm,45mm10mm;45mm6mm,50.8mm7mm,45mm9.8mm90%,,,,,,,,DL/T82020024~14mm,32mm159mm32~89mm,4~14mm:20100312:(1970-),,,1EPOCH4,:K=3,=71.6,5mm,5MHz,DL1(T91),,2DAC6mm,,5mm1mm,80%,,4dB6mm,1mmDAC3,,,63朱健:超超临界电站锅炉小径管焊缝超声波探伤2011333CG98,0~4dB,,,,,3dBDAC10dB,,,,,,,,;,,,,,,,,;,,,,,,:,,;,,,,,,,,4T91T91/P9110%,,,,,T91,,,T91,,,T91,,T91,6087m/s,3310m/sT91,T91,(1),:sincL=sincS=sinT91cST91(1);cL;;cS;T91T91;cST91T911h,T91,h,:t=2hcoscStT91=2hcosT91cST91tT91t=coscScosT91cST91(2)t;64朱健:超超临界电站锅炉小径管焊缝超声波探伤2011333tT91T91,h(),(2):hT91h=coscScosT91cST91(3),l:lT91l=sinT91cST91sincS(4):lT91l=1.05h;hT91tT91;l;lT91tT91,T91,5,,,,,,,,:[1],,.[M].:,2008.[2]DL/T8202002[S].(上接第62页)11)ACFMACFMPOD:1):[1].[J].,2001,23(1):2-6.[2].NDT[J].,2008,30(4):208-210.[3].[J].,2002,24(4):626-628.[4],.[J].,2007,25(z1):50-51.[5]HornD,MayorWR.NDEreliabilitygainsfromcombiningeddycurrentandultrasonictesting[J].NDT&EInternational,2000(33):351-362.[6]RezaK,MaryamR,HesamSH,etal.UsingACfieldmeasurementdataatanarbitraryliftoffdistancetosizelongsurfacebreakingcracksinferrousmetals[J].NDT&Einternational,2008(41):169-177.[7]ZainalAI,CatalinM,GuiYT.Pulsededdycurrenttestingwithvariabledutycycleonrivetjoints[J].NDT&EInternational,2009(42):599-605.[8],,,.[J].,2001,23(12):514-517.65