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:20021114:(1977),,,:CN311508(2003)040025051,2,2,2,1(1.,200030;2.,310027):;;;;LarsonMiller:Larson-Miller,,:TK225:A1,,,,,,4[1],;2[2],,;3[35],LarsonMiller;4,3,,,2,1105h[6],:tr=A-B(1):,MPa;tr,h;AB(1),:logtr=logA-Blog(2)(2),,(2),,2(1)logtmin105=log(0.8t105/zs)log(t104/t105)(3)logtmin2105=0.301log(0.8t2105/zs)log(t104/t2105)(4)(2)logt105=log(t105/zs)log(t104/t105)(5)logt2105=0.301log(t2105/zs)log(t104/t2105)(6):tmin,h;t,h;zs(),,nzs,n1.52.5t104t105t2105t110411052105h34420037BOILERTECHNOLOGYVol.34,No.4Jul.,2003©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,MPa,(),,,h[7],1105h2105h,,,,,36,22[8],,,[910],,da/dt,da/dt,,dN/dt,Nf,,,,,(ttr),A,:A=attr-b(7):A;t/tr;a,btrem:trem=ttrt-1(8)(7)(8)Atrem:trem=taA-b-1(9)CanAt/tr:A=1-1-ttr(-1)/n(10):=r-s;r;s;n(4)(2),:trem=t11-(1-A)n/(-1)-1(11)(11):A,(11):,4,,,:h=p(D2x-0.5)(12):h,MPa;p,MPa;D,mm;x,mm,,(TTP):6234©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.TTP=f(h)(13)TTP:MansonHarferd:MHP=logtr-logtATK-TA(14)MansonSuccop:MSP=logtr+BTK(15)LarsonMiller:LMP=TK(C+logtr)(16)OrrSherbyDorn:OSDP=logtr-Q4.57293TK(17):TK=T+273.15,K;T,;tr,h;TABCQ,,Man2sonHaferdMansonSuccop,TKlogtr,,,TK-logtr,,LarsonMillerOrrSherbyDorn,,1/TKlogtr,,1/TKlogtr,,,,LarsonMiller[45]LarsonMiller(LMP):LMP=T(C+logtr)=a0+a1(log)+a2(log)2++am(log)m(18):,MPa;m;C(20)ma1a2a3,LMP,:ASSE=(Y-Y)2/n(19):n,,,,5LarsonMiller,,,:c=t-0=1(1-e-2t)+3t+4e(t-t)5(20):c;t;0;i(i=15);t2EvansWilshire3,2,:c=t-0=1(1-e-2t)+3(e4t-1)(21):1234i:logi=ai+biT+ci+diT(22)aibicidi4,,,logii,,,,,6724,:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.6.1,2:(1):,,(2):,,,,,,,,,,[11],,,,6.2,,,,,,:x2=Kpt(23):t,h;Kp,mm2/h;x,mm,(x),(h),,,:h=hox0x(1+2ab)(24):ab,a=b;h,MPa;x0,mm,:ho=prx(25):r,mm;p,MPa,a=b=3,(24):h=3h0x0x(26),,,VonMises:(1-2)2+(2-3)2+(3-1)2=220(27):1=h,2=h/2,3=0;h,h=1.150,,[12],,6.3,,,[13]:=tfts2(28)8234©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.=cs1.00(29):ts;tfs;s;c,,,7(1),;,,,(2),LarsonMiller,,,,,,,(3)4,,,(4),,,:[1]Klok.J.VGB2Conf.Residuallifeasseasment[M].Mannheim,1992.[2]N.K.Mukhopauhyay.S.G.Chowdhury.Remaininglifeesti2mationofaserviceexposedeconomisertube[J].EngineeringFailureAnalysis,1999,(6).[3]A.Iseda,Y.Sawaragi.K.YoshiKawa.ISIJInternation[M].1990.[4]A.K.Ray.Y.N.Tiwari.Residuallifepredictionofserviceex2posedmainsteampipeofboilersinathermalpowerplant[J].EngineeringFailureAnalysis,2000,(7).[5]A.K.Ray.etc.S.Chaudhuri.Evaluationofmechanicalproper2tiesandassessmentofresiduallifeofaservice2exposedWaterwalltube[J].EngineeringFailureAnalsis,2000,(7).[6],.[J].,1997,125(1).[7].()[J].,1995,(3).[8],.[J].,1998,31(10).[9].[J].,1997,(8).[10].[J].,1990,(3).[11].[J].,1995,(5).[12].[J].,2000,19(1).[13].[J].,1998,(1).CalculationMethodsandApplicationsforRemainingLifeofBoilerHighTemperaturePartZHENGXiao2hong1,ZHAOXiang2,CAOXin2yu2,ZHOUJun2hu2,WANGRu2zhu1(1.InstituteofRefrigerationandCryogenics,ShanghaiJiaotongUniversity,Shanghai200030,China;2.InstituteforThermalPowerEngineering,ZhejiangUniversity,Hangzhou310027,China)Keywords:remaininglife;hightemperaturecomponent;persistentstrength;creepdam2age;LarsonMillerparameterAbstract:Theboilerhightemperaturepartsareimportantcomponentsoftheboiler,andtheirworkingconditionaffectstheeconomyandsafetyofthewholeunit.Thispaperdiscussesfourcal2culationmethods,includingpersistentstrengthmethod,creeplaw,Larson2Millerparameter,andmethod,forremaininglifeofboilerhigh2temperatureparttoforecasttheremaininglifeofthesecomponents.924,:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.