35CrMnSiA钢片状马氏体和贝氏体TEM研究

35CrMnSiATEM1,2,1,1,1(1.洛阳船舶材料研究所,河南洛阳471039;2.河南科技大学材料科学与工程学院,河南洛阳471003):35CrMnSiA,35CrMnSiA,(112),,,35CrMnSiA,:;;;:TG111.5;TG142.33:A:0254-6051(2008)09-0084-03TEManalysisofplatemartensitesandbainitesin35CrMnSiAsteelZHANGJin-min1,WENJiu-ba2,WANGJia-min1,ZHOUHao1,SHIXin1(1.LuoyangShipMaterialResearchInstitute,LuoyangHenan471039,China;2.SchoolofMaterialsScienceandEngineering,HenanUniversityofScienceandTechnology,LuoyangHenan471003,China)Abstract:Characteristicsofplatemartensitesandbainitesin35CrMnSiAsteelwerestudiedbytransmissionelectronmicroscopy(TEM).Theresultsshowthatthemartensitesin35CrMnSiAsteelareplatetwinmartensites.Itstwin-ningplaneis(112).Thefastsheartransformationofmartensitemedianridgeinducestheformationofbothsidesmartensites.Andmediummartensitewiththebothsidesmartensitesremainthetwinrelationshiptolowermartensitenucleationworkandthevolumestrainenergy.Theformationmechanismofparallelarrayedplatemartensiteswasanalyzed.TheSicontentinmartensitesishigherthanthatinbainites.Bainitestransformationbelongstodiffusiontransformation.Keywords:platemartensite;martensitephasetransformation;twin;bainitesphasetransformation:(1975.05),,,,,:0379-67256428E-mai:[e-mail]:2008-03-23,:,,[1-2],[3-5](AFM),{557}{225}[6](112),(112)35CrMnSiA1试验材料和方法35CrMnSiA,(,%)0.32~0.49C0.80~1.10Mn1.10~1.40Si1.10~1.40Cr0.025P0.025S030Ni0.25Cu0.15Mo8802903hCM2000.5mm,50m,2试验结果与分析135CrMnSiATEM35CrMnSiAMs310,290,,(1a),,842008339100nm,55~60,,,1,f,(112),[111],(112),1g[111],,[111][112]1/3[111]1/3[112],(111)*,[111],[100],1e(110),,,,,,1b,[7-9],135CrMnSiATEM(a)+(b)(c)(d)(e),g=(110)(f)[110]//[110]T(g)B=[111]Fig.1TEMimagesandSADPofplatemartensitesandbainitesin35CrMnSiAsteels(a)platemartensite+bainite(b)parallelplatemartensite(c)bothsidesplatemartensitesinducingnewtwinmartensite(d)platemartensite(e)thedarkfieldimageof(d),g=(110)(f)theSADP(selectedareadiffractionpattern)of(d)[110]//[110]T(g)theSADPof(d)B=[111]852008339,,,,Ms310,350,,,2,,,,,,,,,,,1b[1]2()Fig.2Formationschematicofthreeplatemartensites(thearrow-headsareshearorientationofmartensites),,EDAX,Si,,1c,,SiSi,Si,,,,,,,,,,,100nm,,,,,,,,,Si,,,,,3结论(1)35CrMnSiA,(2),,,:[1],,.[J].,2005,26(1):48-52.[2],,.[J].,2005,26(5):100-106.[3],,,,.[J].,2003,13(12):1286-1293.[4],,,.[J].,2004,16(2):50-57.[5],,,,.{225}fAFM[J].,2006,14(1):81-86.[6],,,.9Ni[J].,1989,17(1):39-43.[7]ShtanskyDV,NakaiK,OhmoriY.GrystallographyandstructuralevolutionduringreversetransformationinanFe-17Gr-0.5Ctempered[J].ActaMater,2000,48(8):1679-1689.[8]MoritoS,TanakaH,KonishiR.Themorphologyandcrysta-llographyoflathmartensiteinFe-Calloys[J].ActaMater,2003,51(6):1789-1799.[9]KellyPM,JostsansA,BlakeRG..Theorientationrelation-shipbetweenlathmartensiteandausteniteinlaocarbonlowalloysteels[J].ActaMetallMater,1990,38(6):1075-1081.862008339