回火工艺对高强度管线钢组织性能的影响

,,,(,114009):,,,,,M/A;,,;58040min,,X120:;;;:TG156:A:1006-4613(2009)01-0018-04EffectofTemperingProcessontheStructurePropertyofHighStrengthPipelineSteelZhangShuai,RenYi,WangShuang,LiuWenyue(TechnologyCenterofAngangSteelCo.,Ltd.,Anshan114009,Liaoning,China)Abstract:Theheattreatmentexperimentforthehighstrengthpipelinesteeliscarriedoutusingthedifferenttemperingschedule,andtheinfluenceregularityofthetemperingprocessonthestructurepropertyofthetrialsteelisinvestigatedbythemicroscopedevicessuchasmetallographicmicro2scope,scanningelectronmicroscope,TEM,etc.TheresultsindicatethatfluctuatingphenomenoninsteelstrengthismainlyundertheinfluenceoftheM/Aislandandcarbidedecomposition,precipitati2onstrengthening,andthedecreaseofthedislocationdensity,etc.intherangeoftheexperimentalprocesswiththeincreaseofthetemperatureandtheelongationofthetempertime.Theelongationin2creasessharplyandtheimpactductilitydoesn’tdropaftertempering.ThecomprehensivepropertiesofthetrialsteelareexcellentandcanmeettheneedsofX120gradepipelinesteelundertheconditionoftemperingatthetemperatureof580for40minutes’incubation.Keywords:heattreatment;precipitationstrength;X120,,,,,2004,[1],X120,827MPaX1205%15%X120DQ(TMCP)+,,X120X120,8120091ANGANGTECHNOLOGY35511.1MnMoNbTiNiB,1,Ms,2,15mm1.21()%CSiMnPSNOCeqPcm0.050.271.680.00580.0020.0050.001CuNiMoNbTiB0.460.212Rt0.5/MPaRm/MPaA/%Rt0.5/RmAkv,-20/J845101060.842492382155,33//min1500202500403540304580205580405,15mm150mm35mm,112.7mm310mm10mm55mm,-20,,4%,,22.14,,,,;,,,4#5#5801#2#500;2#5#40min20min1#4#,,,4Rt0.5/MPaRm/MPaA/%Rt0.5/RmAkv,-20/J182091013.50.90268285094513.50.90255383092016.00.90265485092516.50.92216589094518.00.94239,X120[2](1),2#,,19120091ANGANGTECHNOLOGY355,,,,,,,,5#,,,,,2.22,M/A,,,,,,,,,,,,,,,M/A,,,5#(58040min)23PDAP=0.298(Gbl)ln(2/3db),d;l;b;G3,50150nm,3(a),,Nb(CN);,510nm,3(b),,,;,510nm,:D=BbG1/2,B,1;b;G;4,,,,,,,02:20091355,,,,,,,,,,,,,4(1),,,,(2)M/A,,,,(3),58040min,,X120[1].[J].,2004,27(6):1-11.[2],,,.X120DQ-T[J].,2007,32(10):44-47.():2008-08-221220091ANGANGTECHNOLOGY355