T91钢管TIG焊接接头力学性能与显微组织分析

ElectricWeldingMachineT91TIGT91。T91TIGTIG。T91TIG。T91TIG。T91TIGTG454A1001－2303(2010)09－0092－0340920109Vol．40No．9Sept．2010ElectricWeldingMachine(646005)AnalysisonmicrostructuresandmechanicalbehaviorunderhightemperatureofT91steelTIGjointYANGXing-quan(DepartmentofMechanicalEngineering，SichuanCollegeofChemicalTechnology，Luzhou646005，China)Abstract：WeldingT91steelpipeisusuallyusedTIGweldingmechanicalbehaviorunderhightemperatureofweldedjointsplayedanimportantrole．MechanicalpropertyandmicrostructureofT91steelpipejointwithTIGweldingondifferenthigh-temperaturetestprocesswasresearched．TheresultshowedthatT91steelafterhightemperaturetestingthemechanicalpropertiesofTIGweldedjointschangedlittle．Martensitewasincreasedandcarbidewasappeared．Thecarbideplayedanimportantroleonmechanicalbehaviorunderhightemperatureofjointstability．Keywords：T91steel；TIGwelding；mechanicalbehaviorunderhightemperature；microstructure；carbide：2010－08－18：(1975—)。0、、600℃12Cr1MoV、。T91、。T91600℃F11F1270％[1－3]。T91。[4]。。TIGT91T91TIG。11．1T91φ63．5mm×T91TIG92··ElectricWeldingMachine5mm1、2。φ1．6mmTGS－9cb3ZX7IGBT。1．2TIGφ1．6mmTGS－9cb150℃85～95A20～25V70～80mm／min65～75mm／minV0．5mm30°～35°2～3mm1760℃2h150℃／h。ab1630℃650℃500h30MPa。GBT2651－2008《》、GB2653－2008《》GB／T2650－2008《》WES－600W、。OLYMPUS－CK40M。22．1T91TIG2。605MPa590MPa630℃500h603MPa587MPa650℃500h608MPa585MPa。T91TIG、630℃500h650℃500hT91TIGT91TIG。2T91TIGT91TIG180°630℃500h150°～165°650℃500h90°。T91TIG。、630℃500h650℃500hAKV42J、45J37J630℃500hAKVAKV。2．23aT91TIG。、。3bT91TIG630℃500h。。3cσb／MPa5902T91σ0．2／MPa421δ／％18AKV／J41w(C)0．10w(S)≤0．01w(P)≤0．02w(Si)0．36w(Mn)0．47w(Ni)0．24w(Cr)8．56w(Mo)0．96w(V)0．21w(Nb)0．08w(N)0．06w(Fe)1T91％w(C)0．080w(Si)0．200w(Mn)0．950w(P)0．0063TGS－9Cb％w(S)0．006w(Ni)0．690w(Cr)9．020T91TIG993··ElectricWeldingMachineT91TIG650℃500h。630℃500h。3a、3b、3cT91TIGTIGTIG。3b3cTIG。ab630℃500hc650℃500h3T91TIG33T91TIGT91T91TIG。T91。T911050℃Ni、Mn、Cu、Co、CNCr、Si、Me、W、VNbCr、MeV、NbNM23C6M23C6600℃[4]。4(1)T91TIGM23C6。(2)T91TIG650℃。[1]．T91／P91[J]．1991(2)6－31．[2]．T91[J]．1999(2)12－16．[3]．T91TLP[J]．200838(11)18－21．[4]．T91TIG＋MIG[J]．200526(12)59－62．(Si、V、Ti、Mn、Mo、Nb、Cu、B、Re)5％、、、。。。!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!4094··