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LNG9%Ni,(,065000):9%NiSHCCTY,22.1mm9%Ni90%RH-10NiCrMo/,:75,100,1520kJ/cm:LNG;9%Ni;;:TG142.1:A:1001-3938(2010)08-0014-05WeldabilityResearchof9%NiSteelforLNGTankYINZhang2hua,ZHANGFeng(PipelineResearchInstituteofCNPC,Langfang065000,Hebei,China)Abstract:Inthispaper,combinedwithSHCCTchartof9%Nisteel,Y2groovecracktestandHAZperformacnetestre2sultsofweldingjoints.itpointedout,whentheenvironmenttemperatureishigherthan10andtheenvironmenthu2midityislowerthan90%,adoptingNiCrMoalloyedelectrode/wire,thefollowingrecommendedprocessesandlineren2ergywereusedinordertoobtainhighqualityweldingjoints:controllingpreheattemperatureisatabout75,inter2passtemperatureislessthan100,weldinglinerenergyisas1520kJ/cm.Keywords:LNGtank;9%Nisteel;weldability;HAZ0,,LNG(liquefiednaturalgas,LNG)9%Ni1944w(Ni)=9%,,,,,-196[1]1960,9%NiLNGLNG9%NiLNG,9%Ni,LNG9%NiLNG9%Ni,9%Ni,11.11.1.19%NiASTMA533,22.1mm,4133820108+(QT),(1),1219%Ni%w(C)w(Mn)w(P)w(S)w(Si)0.0360.5920.0030.00030.209(Cu)(Ni)(Cr)(Mo)(Nb)0.0429.1150.0420.0170.00229%NiRp/MPaRm/MPa/%-196/J70372724208:V10mm10mm55mm11.1.29%Ni,,,O,N,S,PA3089%Ni,,,,9%NiNi,Ni,,,,[2],9%NiNi-Cr-MoNi-Mo,LINCOLNNYLOID23.2mm,AWSA5.11M-97ENiCrMo-6,1.29%Ni,1.2.1Gleeble-3500XJP-6AHVA-10AQuantLab-MG,SHCCTAc1Ac3,3/min,tp800,10min,5/s,100/s,1350,1s,60/s750,1,,,,1.2.2YY9%Ni(HAZ),9%NiGB4675.11984YY,1.2.3,Gleeble-3500,(ICHAZ)(CGHAZ)(IRCGHAZ)(SRCGHAZ)4HAZ,,,9%Ni,51338:LNG9%Ni22.19%NiSHCCT2,29%Ni(22.1mm)SHCCT2,,c1040/s,22.1mm9%Ni,100%,HV10321334,(IIW),HV10350MS,,,3-196CharpyV,1525/s,,10/s25/s,,,,,c1525/s,t8/51220s2.2Y,3Y,3,LINCOLNNYLOID23.2mm3501h,ZX7-400ST,,120128A,2024V,(11010)mm/min3453//RH/%/%/%07590000757500075600007545004RH/%///%/%5075-1001.95075001.450751000.3507520005/RH/%//%/%256025011.725605008.5256075002560100003,,,,,45,,,,,,,,NYLOID23.2mm22.1mm9%Ni,90%RH,-10t07561201082.3,Sysweld,9%Ni,,,Gleeble-3500,HAZ4(ICHAZ,CGHAZ,SRCGHAZ,IRCGHAZ),9%NiAC1(620)AC3(730),4,66HAZTP1/TP2/ICHAZ650CGHAZ1350SRCGHAZ1350850IRCGHAZ13506502.3.1ICHAZ,CGHAZ,SRCGHAZ,IRCGHAZ477/(kJ/cm)/t8/5/s-196Cv/JICHAZCGHAZSRCGHAZIRCGHAZ2615020.12273044181015010.52274514445265014.022727772710508.021826105271810012.62272010228::10mm10mm55mm7,,HAZ5,ICHAZ,-196200J,,ICHAZ,CGHAZ,SRCGHAZCGHAZ,IRCGHAZ,,9%NiCGHAZ,SRCGHAZIRCGHAZ3,88-196/J/JT1T-1T0RT1T-1T0RCGHAZ37.526.52017.528.535.52015.5SRCGHAZ94911021160.5124.510264IRCGHAZ31.527284.522.5362813.5:T1;T-1;T0;R8:(1)SRCGHAZ,64J,,,,(2)CGHAZ,17.5J,CGHAZ(3)SRCGHAZ,,,(4),SRCGHAZIRCGHAZ,CGHAZ,,:9%Ni6,150,10kJ/cm71338:LNG9%Ni2.3.2ICHAZ,CGHAZ,SRCGHAZ,IRCGHAZHV1099/(kJ/cm)/t8/5/sHV10ICHAZCGHAZSRCGHAZIRCGHAZ2615020.1210.3236.7296.3224.31015010.5209.0300.3317.0222.0265014.0215.7252.7236.0248.010508.0202.0326.0289.7225.01810012.6234.0265.3279.3223.39,,,HV10=374.0563-0.2085X1-4.2781X2,(1):X1,;X2,kJ/cm(1),,,9,,t8/5,;,,,,9,,,,,,,,,,:(1),,;,,(2),9%NiSHCCT,100,100,150,,,,+,[2],,1520kJ/cm3LNG22.1mm9%Ni:9%Ni,90%RH-10,LINCOLNNYLOID23.2mm,,:(1)75;(2)100;(3)1520kJ/cm;(4)c1525/sNi-Cr-Mo/9%Ni:[1]ARMSTRONGTN,GROSSANDJH,BRIENRE.Prop2ertiesAffectingSuitabilityof9PercentNickelSteelforLow2temperatureService[J].WeldingJournal,1959,l38(2):57-70.[2].(2)[M].2.:,2001:437.:(1972-),,,:2010-02-21:8120108