简介：Optimizationofscraputilization,throughmaintainingareasonableheavyscrapratio,determinationofscrapyield,developmentofsubstitutesforscrap,recyclingofhigh-alloyscrapandoptimizationofscraputilizationtechnology,wasinvestigatedinthispaper,intermsofthesupplyofmetalmaterials,productioncost,productionqualityandenvironmentprotection.Then,recyclingofsolidwasteresourceswasdiscussed,andtheutilizationconditionsandmethodsofslag-steel,slag-iron,steel-slag,etc.weredetermined.Finally,themanagementsystemforcomprehensiveresourceutilizationwasintroduced.

简介：ThistalkwillsummarizetherecentworkrelatedtoakindofnewnanomaterialsproducedbytheSMAT(surfacemechanicalattritiontreatment).Theconceptofsurfacenanocrystallizationofmaterialswillbepresented.Intermsofthegrainrefinementmechanisminducedbyplasticdeformation,anovelsurfacemechanicalattrition(SMA)techniquewasdevelopedforsynthesizingananostructuredsurfacelayeronmetallicmaterialsinordertoupgradetheoverallpropertiesandperformance.ThegrainrefinementmechanismofthesurfacelayerduringtheSMAtreatmentwillbeanalyzedintermsofthenanostructureobservationsinseveraltypicalmaterials.Veryhighyieldstress(5timesofthebasematerial)onthesurfacelayerofthematerialobtainedbytheSMAThasbeenobserved.Theeffectofsurfacenanostructuresonthemechanicalbehaviorandonthefailuremechanismofmetallicmaterialshowsthepossibilitytodevelopanewstrengthgradientcompositeusingco-rollingandnitriding.Theroleofresidualstressinducedduringthetreatmentwillbeinvestigatedanddiscussed.Thedevelopedmaterialsarealsoporosityfreematerialswhichcanbeusedasreferencematerialforthelocalmechanicalbehaviorinvestigationtechniquesuchasthenanoindentation.Ageneralconceptforobtaininghighstrengthandhighductilitynanostructuredmaterialswillbepresented.Theexceptionalhighstrengthandhighductilitysteelshavedeveloped.Thesimulationofthemechanismsforimprovingductilityofhighstrengthnanostructuredmaterialswillbepresented.Thepotentialapplicationsforthelandtransportationvehicles(car,bus,train)andwindenergyhavebeeninvestigated.Someexamplesofconceptdesignfortheintegrationoftheadvancednanostructuredsteelswillbepresented.

简介：Supercriticalwaterreactor(SCWR)wasproposedasaGenerationⅣconceptforbuildinglargecapacitynuclearpowerplants.ComparingwiththepresentGenerationⅡandⅢlightwaterreactors,SCWRpossessesgreatadvantagesof10%higherefficiency,simplersystemdesign,bettersustainability,andsoon.However,theselectionofmaterialsforfuelcladdingandreactorinternalsofSCWRisfacingagreatchallenge.Corrosioninsupercriticalsteamisofthefirstimportantissuetobesolvedtomeetthestringentrequirementofthereactorinternalcomponents.Corrosionscreeningtestswereconductedoncandidatematerialsfornuclearfuelcladdingandreactorinternalsofsupercriticalwaterreactor(SCWR)instaticandre-circulatingautoclaveatthetemperaturesof550,600and650℃,pressureofabout25MPa,deaeratedorsaturateddissolvedhydrogen(STP).NickelbasealloytypeHastelloyC276,austeniticstainlesssteelstype304NG,AL-6XN,HR3C.NF709andSAVE25,ferritic/martensitic(F/M)steeltypeP92,P122and410,andoxidedispersionstrengthenedsteelMA956,aretested.Thispaperpresentscorrosionrate,andfocusesontheformationandbreakdownofcorrosionoxidefilm,andproposesthefuturetrendforthedevelopmentofSCWRinternalstructurematerials.

简介：TheapplicationtechnologyusingBaosteelsteelslagpowderasanadmixtureofconcreteisthedevelopmentaldirectionofsteelslagrecyclingtreatmentandutilization,whichfullyreflectsthebasicfeaturesandgoodcompatibilityoftheover-calcinedclinkerofsteelslagresources.Itisbeneficialtofullyexploitthewaterhardeningcharacteristicandpotentialactivityofsteelslag,toreduceandcontroltheunstablefactors,suchasfreecalciumoxideandmagnesiumoxide,andtorealizehighvalue-addedapplicationsandexplorenewapplicationfields.

简介：Suggestionshavebeenputforwardspeedingupthedevelopmentofhigh-leveltoolsteelandmoldsteelinChinabasedontheanalysisofproductsanddevelopmentstatusofspecialsteelhomeandabroad.Feasibilityandnecessitytoproducehigh-leveltoolsteelandmoldsteelbyapplyingthesprayformingmethodinfuturehavebeenputforward.

简介：Oneofthepathwaysforachievingthegoalofincreasingtheefficiencyofcoal-firedpowerplantsandreducingtheemissionofpollutantsandCO2isbyimprovingthesteamtemperatureandpressure.Buttheincreaseofsteamparametersdependonthedevelopmentofnewhigh-temperaturemetalmaterials.ThispaperpresentedtheconstructivesuggestionsoncriticalmaterialsselectionforChina’snewgenerationof700℃cleanandhigh-efficiencycoal-firedboilerbysummarizingtheresearchanddevelopmentsituationofcriticalmaterialsforcoal-firedboilersoperatingat700℃/35MPaoftheEurope,JapanandUSA.