焊接工艺对厚壁核压力容器焊接残余应力的影响

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DOICNKI:33-1331/TJ.20110318.1315.0362011-3-1813:15:18准2287准6180准1565准2466准570067321001276R32502401Fig.1Geometricmodel“”,、。、、,,。,。[1-3],,。,,、,、“”。11.1(5700mm;24895mm;240mm),,,,,1(:mm)。1.2。,IU。,,,(,710048),“”,,,“”。:UI;“”U。;;;;TG407A1004-244X(2011)02-0016-04Influenceofweldingprocedureontheresidualstressoftheweldedthick鄄wallnuclearpressurevesselZHANGMin,CHENLuyang,LIJihong,ZHANGMeili(SchoolofMaterialScienceandEngineering,Xi′anUniversityofTechnology,Xi′an710048,China)AbstractBasedonthethermalelastic鄄plasticfinite鄄elementtheory,thispaperadoptedthetechnologyofElementBirthandDeathtosimulatethedistributionregularityoftheweldingresidualstressatthesaddle鄄shapedweldbetweenthethick鄄wallnuclearpressurevesselandtheconnectiontube,andfocusedontheeffectsofthegroovetypeandtheweldinglayersemployedincalculationontheresidualstress.Theresultsshowthatitisofmorehelpinreducingequivalentresidualstresstoadoptthedouble鄄UgroovethantouseIgroove,anddifferentweldinglayersadoptedincalculationhavecertaineffectsontheweldingresidualstressofthedouble鄄Ugroove.Keywordsfiniteelement;elementbirthanddeath;pressurevessel;residualstress;groove:2010-10-12;:2010-12-03:(00k904);(00X901):,,,,;、。E-mail:zhmmn@xaut.edu.cn。ORDNANCEMATERIALSCIENCEANDENGINEERINGVol.34No.2Mar.,201134220113C:\DocumentsandSettings\MWY\\2011-2.psPage16of1122011-03-1615:3124Fig.4Propertyparameterofmaterial3Fig.3Meshgeneration2Fig.2Weldingsequence1Table1Grooveandweldinglayer/mmI30612U30612386—,“”,“”。:550A;35V;400mm/min;0.78;200℃;≤350℃。1,2。1.3,,,,。,B.BrickstadB.L.Josefson[4],,:q=U·I·ηVU;I;η;V。1.4,,,,(solid70),(solid45)。,Ⅰ(30mm)43144,15027;Ⅰ(38mm)40052,14119;U(30mm)65026,14811。3。[5-6],,SA508Gr.3Cl.1。4,cp100J/(·K),κ10W/(m·K),α10-5K-1,σs100MPa,E104MPa,G105MPa,[8]7800kg/m3,17W/(m2·K),0.3。1.5“”,,,,,ANSYS“”。,“”“”,,,。22.1,30240a—I624030b—U120246810121416/℃731G50246cpσsEκα(×102):17C:\DocumentsandSettings\MWY\\2011-2.psPage17of1122011-03-1615:3134σ/MPa612/mm0100-600-200200-800-40040040030080060002005Fig.5Temperatureprofileofdifferentlocationsatweldinglinelowersurface020406080/s1000161284/℃(×102)(×103)a—I,6,1400℃020406080/s1000161284/℃(×102)(×103)b—I,12,1400℃020406080/s0161284/℃(×102)(×103)c—U,6,1400℃020406080/s1000161284/℃(×102)(×103)d—U,12,1460℃,、。,、“”。5“”。2。I,。5a、b,,。,。U,U。5c、d,U,。,,,。5d,12,UU,,。5,,,,。,,。2.26I(30mm)“”。,,“”,413.97MPa,。,。7U(30mm)“”。,,;“”,384.88MPa。126I(30mm)Fig.6PostweldingequivalentstressdistributioncurveofI鄄formgroove(30mm)18C:\DocumentsandSettings\MWY\\2011-2.psPage18of1122011-03-1615:312912Fig.9Equivalentstressdistributioncurveoftwogrooveafter12passwelding7U(30mm)Fig.7PostweldingequivalentstressdistributioncurveofdoubleU鄄formgroove(30mm)836Fig.8Equivalentstressdistributioncurveofthreegrooveafter6passwelding6。2.383“”(6)。,:I(38mm),453.23MPa;I(30mm),413.97MPa;U(30mm),367.26MPa。3,;,:I,U。9“”(12)。,,I,412.37MPa;;IU,UI。31),,。2),UI。3)“”,U。4[1],,.[J].,1997,14(3):213-217.[2],.[J].,2006,33(3):156-162.[3].[J].:,2009,17(4):1-3.[4]BrickstadB,JosefsonBL.Aparametricstudyofresidualstressesinmulti鄄passbut鄄weldedstainlesssteelpipes[J].In鄄ternationalJournalofPressureVesselsandPiping,1998,75:11-25.[5]ZhuXK,ChaoYJ.Effectoftemperature鄄dipendentmaterialpropertiesonweldingsimulation[J].ComputersandStructures,2002,80(11):967-976.[6]GoldakJ,ChakravartiA,BibbyM.Anewfinitemodelforweldingheatsource[J].MetallurgualTransactions,1984,15B(2):299-305.[7]IwadateT,TanakaY,TakemateH.PredictionoffracturetoughnessKICtransitioncurvesofpressurevesselsteelfromcharpyV鄄Notchimpact[J].TestResultstheJapanSteelWorksLTD,1992,47:6.:0100-600-200200400400300800600σ/MPa612/mm0200-800-40015025035050σ/MPaⅠ(30mm)Ⅰ(38mm)U(30mm)/mm0-600-200200-800-4004004003008006000200100500σ/MPa/mmⅠU-800-600-400-2000200200400600800010040030019C:\DocumentsandSettings\MWY\\2011-2.psPage19of1122011-03-1615:31

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