热处理对3.5Ni钢低温韧性的作用

266200811PhysicsExaminationandTestingVol.26,No.6Nov.20083.5Ni1,2,2,1,2(1.,430081;2.,430080):3.5Ni,,315Ni,,850850+600:315Ni;;:TG111:A:100120777(2008)0620009204EffectofHeatTreatmentonLow2temperatureToughnessof315NiSteelLIJian2hua1,2,XITian2hui2,CHENXiao1,2[1.WuhanUniversityofScienceandTechnology,Wuhan430081,Hubei,China;2.ResearchandDevelopmentCenterofWuhanIronandSteel(Group)Corp,Wuhan430080,Hubei,China]Abstract:Theeffectofheattreatmentprocessonmechanicalperformanceandmicrostructureof3.5Nilow2tempera2turesteelwasintroducedinthispaper.Theresultshowsthattheheattreatmentofrolled315Nilow2temperaturesteelcanimprovethemechanicalperformancebyfininggrainsizeandadjustingmicrostructure.Excellentlow2tem2peraturetoughnesscanbegainedby850normalizedor850normalizingfollowedby600tempering.Keywords:3.5Nisteel;heattreatment;low2temperaturetoughness:(19662),,,;E2mail:[e-mail];:2008207218,,,,,-60;,,,,-196,,,[13]-7009MnNiDR,[4],,,315%9%,,,-100315Ni,,,,[5]2005315Ni,315Ni11.13.5Ni[68],CSiMnPSNi,MoTiNbCu,(,%)113.5NiTable1Chemicalcompositionof3.5Nisteel%CSiMnPSNiMoTiNbCu01040125016501010100531601.250kg©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[9]Ac3=910-203C12+4417Si-1512Ni+3115Mo+104V-30Mn+11Cr+20Cu-700P-400Al-120As-400Ti,315NiAc3797Thermecmastor2Z,YB/T5127293(),(0105/s),315NiAc3787,:830860,600630,GB/T22921994,-90-110-130,Quanta400EBSD22.1,223.5NiTable2Testedresultsofmechanicalpropertiesfor3.5NisteelReL/MPaRm/MPaA/%AKV/J20-90-110-13004806002413275149131437193/53183044055532103101329325117149171761515128604255503113320182972721923114209139333830+6004505553215295162432401678153141131334830+6304455503410320162952571518419241536535860+6004305403518300112962751923515193196236860+630430540331029912297282131571722193133:327J18J:;,;-110,-110,;860830212,JEM2100F,Quanta400EBSD,33315NiTable3Analysisonmicrostructureof315Nisteel(EBSD,m)0B+P+F(1)TiNb,100270nm,71921830B+F+PTiNb(1550nm)(50190nm),,51012860B+F+P(2)1,510nm1,51273830+600B+F+P2,(520nm),51134830+630B+F+P351095860+600F+B+P(3)351246860+630F+B+P(4)35132:FPBMS(FMS)01©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(a)0;(b)2;(c)5;(d)61Fig.1Microstructureofsamples:830,+,,,(860),,,,,3[10],SLT3N28(315Ni,AKV-101228J),,,,,+,(),(9501000),,,,+,,315Ni,+,+,,830(+),(7192m,51015113m),860(+)830(51015113m,51245132m),,,,,,,11©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1)315Ni,,100nm,(2)315Ni,850850+600:[1],.[M].:,2007.[2].()[M].:,1996.[3]ASMInternationalHandbookCommittee.MetalsHandbook[M].PropertiesandSelection:Iron,SteelsandHigh2Per2formanceAlloys,MaterialsPark,ASMPress,1990.[4],[M].:,1998.[5],[J].,2006,23(4):31.[6]JISG3127(1977)[S].[7]SA2203/SA2203M[S].[8]CCS1996[S].[9]AndrewsKW.EmpiricalFormulaeforSomeTransformationTemperatures[J].JournaloftheIronandSteelInstitute.1965,203(7):721.[10],.3.5Ni[J].,1999,16(3):11.(8),,,,(2),BHn,,r(3)3,{111}110,{111}110,r70%{111}110r;75%{111}110{111}112,r;80%,{111}110,{111}112,r,{111}112r:[1]Bo2YoungHur.EffectofDifferentAnnealingConditiononBakeHardenabilityforEnvironmentalAutomotivePanel[J].MaterialsScienceForum,2003,439:265.[2].[M].:,1999:167.[3],.ELC2BH[J].,1997,1(94):26.[4]GB/T20564.122007.2,B(BH)[S].[5].[M].:.2000.[6].rELC2BH[J].,1996,8(31):36.[7].ELC2BH[J].,1998,6(28):160.21©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.