简介:Inthispaper,aspiralmagneticfieldelectromagneticstirrer,whichcanseparatelyinducetwodifferentmagneticfields,isintroduced.Thecorrespondingcentralmagneticfluxcurvesofthestirrerweremeasuredbytwodif
简介:Thisstudyinvestigatesthecorrosionpropertiesof0Cr11Tiand0Cr11NbTiferriticstainlesssteels(FSS)forautomotiveexhaustsystems.Theresultsindicatethatthebasemetalandweldseamof0Cr11NbTisteelexhibitbetterintergranularandcondensatecorrosionresistantpropertiesbecausecarbonandnitrogenarestabilizedbyNbandTi,andtheprecipitationofCrcarbideisretardedingrainboundaries.
简介:Inthisstudy,metallographicanalysisandnanoindentationcharacterizationwereusedtoanalyzethepropertiesandmicrostructuresofas-castnitrogenalloyed27Cr-7Ni-4Mosuperduplexstainlesssteel(super-DSS).Theas-castmicrostructureofthesuper-DSSwascharacterizedbyitsferriteandisland-likeaustenitephases.Duringthesolutionannealingprocess,theaustenitevolumepercentageofthesteeldecreasedgraduallywithincreasedannealingtemperature.Asamainelement,thechromiumcontentintheferriticandausteniticphaseselevatedslightlyatfirstthendecreasedwithincreasedannealingtemperature.Thechromiumpartitioncoefficientinthesteelvariedbyaround1.0.Thecontentsofnickel,anothermainalloyelement,alsoincreasedintheferriticandausteniticphaseswithincreasedannealingtemperature,asdidthenickelpartitioncoefficientinthesteel,whichtendedtobecloseto1.0.Thenanoindentationcharacterizationresultsindicatethatthehardnessoftheaustenitephaseisslightlygreaterthanthatoftheferritephase.Theyweresimilartoeachotherwithinacertaintemperaturerangefrom1050℃to1100℃.Thistemperaturerangewasconsistentwiththetemperaturerangeinwhichthecontentratioofthetwophaseswascloseto1∶1.WefoundtheYoung'smodulusoftheferritephasetobegreaterthanthatoftheaustenitephase.Withincreasedannealingtemperature,theYoung'smodulusoftheferritephasedecreasedwhilethatoftheaustenitephaseremainedalmostunchanged.