简介:Thepaperdescribestheimportanceofcleanproductionofsteelandtherelationshipsamongstsustainingdevelopmentofsteelindustry,environmentprotectionandtheroleofrefractoriesinthecleanproductionofsteel.ThemainachievementsandmainshortcomingsinthecleanproductionofChina′ssteelindustryhavebeenreviewedtogetherwiththeintroductionofthepolicysupportingsystemandthefuturedevelopmentofcleanproductioninChina′ssteelindustry.
简介:ProfessorYuZongsenofBeijingUniver-sityofScienceandTechnologyhassum-marizedtheworksconcerningREadditioninironandsteelinlastfourtofiveyearsandwroteapaperentitled“Re-searchontheApplicationofRareEarthsinIronandSteelinResentYears”,whichwaspresentedinJ.Chin.RESoc.Vol.8No.2(1990)(EnglishEdition).Theauthorshowedmanydataoffree
简介:Inthispaper,aphotoelectricdeviceisintroduced,whichisusedinde-tectingthequalityoninternalsurfaceofthinandlongsteelpipe.Inthisdevice,theCCTVlensisusedforextracttheflawinformationoninternalsurfaceofthepipe,andmakeIBM-PC/AT486computerascontrollingandimageprocessingsystem.Bythisinstrument,thefunctions,suchasthedigitalconversiongofinputinformation,imageprocessing,classificationofrecognitionandoutputdisplaycanbeobtained,Inthepetroleumandchemicalindustry,byusingthisapparatus,wecandetectthequalithoninternalsurfaceofvariousmetalpipeswithreal-timeautomatically.
简介:ItisreportedthattheoutputofREtreatedsteelreached340490tonsinChinain1990,whichwassharedbymetallurgicalindustrywiththeproductionof310089tons(21.6%increasefrom1989),machineryindustry23749.8tons,railwayindustry6665tonsandmilitaryindustry766.8tons.TheadditionofREelementsintosteelimprovesmorphotropy
简介:Theeffectsofrefractoriesofquartz-corundunconsistingof45mass%quartzand55mass%corundum,fusedcorundumandfusedmagnesiaonthetotalaxygencontent(TOC)andthecompositionofinclusionsininterstitialfree(IF)steelwerestudied.3mass%microsilicawasaddedintothethreerefractoriesasbinder.Therefractorieswereshapedasliningofthegraphitecruciblebycastablemethod.IFsteelwasplacedinthecrucibles,thentheywereheatedat1600℃for90minand45minrespectively.Oxygencontentsofthesteelsampleswereobtainedbyaxygendeterminator.InclutsionswereanalyzedbySEMandEDS.TheresultsshowthattheTOCofsteelincreasedwithincreaseofIndexofOxygenPotential(IOP)oftherefractories.ThesteelsamplecopedwithMgOrefractorieshavingthelowestIOPhasthelowestTOC.
简介:SinceChinabegantopursuethepoliciesofreformandopening,itsironandsteelindustryhasbeenfollowingthestrategicprincipleofmakinguseof"tworesources,twomarketsandtwokindsoffunds,"andhasmadeeyecatchingprogressinexpandingopeningtotheoutsideworldandinternationalcooperation.In1993,theindustryutilizedsomeUS$900millioninforeigncapital,
简介:Thesteelreinforcedplasticpipeisakindofgreenenvironmentalprotectionpipelineswithdouble-sidescorrosionresistingandbetterwithstandingtomediumworkingpressure.Thestructureandtechnicalprocessofthispipearedescribedbrieflyinthispaper,andthefiniteelementanalysishasbeendoneforthesakeofunderstandingthedistributionsofstressanddisplacementinsidethispipeunderhydrostaticpressure.Theanalysisresultsareveryimportantforsafetyapplicationofthesteelreinforcedplasticpipe.
简介:TheprocesspropertiesandinterfacebehaviorofCO2laserbrazingwithautomaticwirefeedforgalvanizedsteelsheetswereinvestigated,inwhichthebrazingfillermetalwasCuSi3andnofluxwasused.Astotheappearancequalityofthebrazingseams,therolesoftheprocessingparameters,suchasbrazingspeed,wirefeedingrate,inclinationandfeedingdirectionofthewire,laserpower,spotdiameterandheatingposition,wereassessed.ThefurtherinvestigationindicatesthatthebehavioroftheactiveelementsSi,MnandZnaresignificantlyinfluencedbyenergyinput.Attheinterface,themicrostructureofthebasemetalwascomposedofcolumnarcrystalsandtheacicalarαsolidsolutionwasfoundonthefillermetalside.
简介:Asimplifiedfatigue-lifemodelisproposedforassessingtheseismicinelasticrotationalcapacityofsteelconnections.Firstrelationsaredevelopedforrigidsteelconnectionsunderlateralloading.Nextthisisextendedtoaccountfortheeffectsoftheweldedsteelmomentframe(WSMF)connectionsoftheso-calledpre-Northridgetype.Theseismicfatiguetheoryisvalidatedagainstexperimentalresults.Theexperimentswereconductedunderincreasingductilityamplitudcsuntiltheonsetoffracture.Miner'rulewasusedtoconvertthetestresultstogivenanequivalentconstantamplitudecyclicfatiguelife.Satisfactoryagreementisobtainedwhencomparingtheexperimentalobservationswiththetheoreticalpredictions.
简介:Itisofgreatimportanceforobtainingtheperfectweldingpropertiestocontroltheacicularferrite(AF)transformationbehaviorreasonablyinsteelweld.AFcontinuoustransformationkineticsintheHSLAsteelweldwascalculatedandmodeledbasedonthedirectgrowthontheinclusionsinertinterface.Thesimulationresultsarecoincidentwiththeexperimentalvaluewell.
简介:Atwistedfiberopticsensorbasedonintensitymodulationisdescribed.Theprincipleandstructureofthesensorandthechoiceofsteelstrandmodulesareintroduced.Thesensorisusedtodeterminethetensilestrainanddistribution.Theexperimentalresultsshowthatthechangeofthetransferringlightpowerhasanapproximatelinearrelationwiththeouterforce.Theintelligentsteelstrandswiththiskindofsensorwillhaveagoodapplicationinmonitoringtheconcretecrackanddeformationdistributioninhugestructuressuchasdamsandbridges.
简介:
简介:RecentlyprocuredoutstandingachievementsinironandsteelindustryinChinaarepresentedbydataorfactsinsteeloutput,energyconsumption,technicalandeconomicalindicatorsandadvancedtechnologiesthatarebeingadopted.Thelatestachievementsinrefractonriesforthisbiggestuserindustryarereviewed,coveringnewrefractoriesforCDQcokeoven,BFhearth,AODLining,longlifetundish,SENforcleansteelmakingandregenerativereheatingfurnace.Thereciprocalrelationshipisobviousthattherapiddevelopmentofironandsteelindustryhasgivenanimpetustotheadvanceofrefractoriesindustry,whichinreturnhascontributedgreatlytotheformer.