摘要
The18Ni300gradecobalt-freemaragingsteelT300wassuccessfullymanufacturedonanindustrialscalebyapplicationofvacuuminductionmelting(VIM)andvacuumarcremelting(VAR)processatBaosteel.WiththecontentofOandNlessthan15ppmand10ppmrespectively(1ppm=10-6),theT300steelproducedbyBaosteelobtainedahighdegreeofpurityandagoodcombinationofultra-highstrengthandfracturetoughness.Theeffectsofsolutiontemperatureandageingtemperatureontensilepropertyofsolution-treatedandagedT300steelwereinvestigated.Theresultsshowthatthesolutiontemperatureslightlyinfluencesthestrengthofthesolution-treatedsteel,indicatingthatthesolutionstrengtheningratherthanthegrainboundarystrengtheningismoreimportanttothesolution-treatedsteel.Forthesolution-treatedT300,theelongationandreductionofareadon'tchangemuchwitharisingsolutiontemperature,andremainabove17%and70%respectivelyatthesolutiontemperaturerangingfrom800℃to1200℃.FortheagedT300steel,thestrengthandelongationarereducedwithanincreasingsolutiontemperature,andthesolutiontemperaturehasagreatereffectonthereductionofareathanthatontheelongation.Thereductionofareaoftheagedsteelreachesahighpeakwhenthesolutiontemperaturereaches920℃.Theexperimentaldataindicatesthatprecipitationstrengtheningmakesacontributionof1100MPatothetensilestrengthoftheagedsteel.Theageingtemperatureexertsagreatereffectonthestrengththanontheelongationandreductionofarea.Thesteelachievesabettercombinationofstrengthandtoughnessatthepeakageingtemperatureof500℃.
出版日期
2011年04月14日（中国期刊网平台首次上网日期，不代表论文的发表时间）
