摘要
Martensiticstainlesssteelcontaining12%-18%Crhavehighhardnessduetohighcarboncontent.Thesesteelsarecommonutilizedinquenchingandtemperingprocessesforknifeandcutlerysteel.Thepropertiesobtainedinthesematerialsaresignificantlyinfluencedbymatrixcompositionafterheattreatment,especiallyasCrandCcontent.Comprehensiveconsideredthehardnessandcorrosionresistance,anewtypemartensiticstainlesssteel6Cr15MoVhasbeendeveloped.Thisstudyemphaticresearchestheeffectofheattreatmentprocessesonmicrostructureandmechanicalpropertiesof6Cr15MoVmartensiticstainlesssteel.Thermo-Calcsoftwarehasbeencarriedouttothermodynamiccalculation;opticalmicroscope（OM）,scanningelectronicmicroscope（SEM）andtransmissionelectronmicroscope（TEM）havebeencarriedouttomicrostructureobservation;hardnessandimpacttoughnesstesthavebeencarriedouttoevaluatethemechanicalproperties.Resultsshowthattheequilibriumcarbidein6Cr15MoVsteelisM23,C6carbide,andfinelydistributedofM23C6carbidescanbeobservedonannealedmicrostructureof6Cr15MoVstainlesssteel.6Cr15MoVmartensiticstainlesssteelhasawiderquenchingtemperaturerange,thehardnessvalueofsteel6Cr15MoVcanreachto60.8-61.6HRCwhenquenchedat1060-1100℃.Finelydistributedcarbideswillexistinquenchedmicrostructure,andeffectivelyinhabitthegrowthofaustenitegrain.Withtheincreasingofquenchingtemperature,thevolumefractionofundissolvedcarbideswilldecrease.Theexcellentcomprehensivemechanicalpropertiescanbeobtainedbyquenchedat1060-1100℃withtemperedat100-150℃,anditismainlyduetothehighcarbonmartensiteandfinegrainsize.Atthesetemperatureranges,thehardnesswillretainabout59.2-61.6HRCandtheCharpyU-notchimpacttoughnesswillretainabout17.3-20J.Themorphologyofimpactfracturesurfaceoftestedsteelissmalldimpleswithasmallamountofcleavageplanes.Theareaofcleavageplanesincreaseswiththeincreas
出版日期
2010年02月23日（中国期刊网平台首次上网日期，不代表论文的发表时间）
