ElectricWeldingMachine。12MnNiVR、、。12MnNiVRTG457.5B1001-2303(2008)11-0049-033811200811Vol.38No.11Nov.2008ElectricWeldingMachine(300270)Weldingofdomestichigh-strengthsteelalloy12MnNiVRon100000m3storagetankinwinterseasonsZHANGRui-huan(TheFourthConstructionCompanyofSINOPEC,Tianjin300270,China)Abstract:High-strengthsteelalloyiswidelyusedon100000m3storagetanks.Weldingofhigh-strengthsteelalloyisrelativelycomplicatedspeciallyinwinterseasons.Noweldingactivityshallbestartedunlesseffectiveprotectivemeasureshavebeentaken.Inordertoguaranteeweldingqualityofcrudestoragetanksinwinterseasonseffectiveweldingproceduresandmeasuressuchaspreheatingcontrolofweldingprocessparameterspostweldslowcoolingshallbetakenspecificallytothecharacteristicsofdomestichigh-strengthsteelalloy12MnNiVR.Keywords:high-strengthsteelalloy12MnNiVR;100,000m3storagetank;weldinginwinterseasons:2008-09-03:(1963—)。0、。。12MnNiVR。2006612MnNiVR。φ80000mm×21800mm。12MnNiVR20069120073。5℃0℃、12MnNiVR。12MnNiVR、、95%。1︱︱12MnNiVR49··ElectricWeldingMachinew(C)w(Si)w(Mn)w(P)w(S)w(Ni)w(Cr)w(Mo)≤0.1200.150~0.4001.200~1.600≤0.015≤0.0080.150~0.400≤0.300≤0.300112MnNiVR%σb/MPaσs/MPaA/%W/J(-15℃)610~730≥490≥17b=2a180°d=3a≥100≥70212MnNiVR。。212MnNiVR2.112MnNiVR12MnNiVR。、。12。(%)Ceq=C+Mn/6+Si/24+Ni/40+Cr/5+Mo/4+V/14≤0.45%(%)PCM=C+Mn/20+Si/30+Ni/60+Cr/20+Mo/15≤0.24%。2.2112MnNiVRS、PMn。2.3、。。12MnNiVRCeq≤0.45%PCM≤0.24%。。。12MnNiVR。3、。、。(1)。。、、。(2)。、。。(3)、、、、。、。44.14.1.1(1)、、。(2)、、。(3)、、、60%5℃。(4)。(5)。(6)︱︱3850··ElectricWeldingMachine。4.1.220mm、、。4.24.2.1(1)。(2)-15℃~-20℃δ=32mm12MnNiVRY100℃。δ=32mm12MnNiVRRT、UT、MT、。100℃~150℃。4.2.2(1)100℃~150℃。(2)1。0℃。100℃。1(3)。0℃-5℃。4.312MnNiVR。。4.4(1)。(2)。。(3)。1500mm×1500mm×18.5mm12MnNiVR(SAW)350~450mm/min4℃70℃~110℃。4~6min160℃~190℃2300mm。2500mm。4.5(1)。(2)40°。(3)UT、MT。(4)100kJ/cm。(5)100%UT100%MT。95%。︱︱12MnNiVR1151··