简介：Fromtheviewofthedomesticandinternationalenergy,environmentandoperationsituation,thepaperanalysestheconfrontedproblemsofironandsteelindustry,answerswhybaosteelhasbeenfulfillingenvironmentoperationstrategy,andproceedtotheintroductionofitsenvironmentmanagementpracticeandfutureoutlooks.Theenvironmentmanagementisessentiallyagreenvaluecreation,whichemergestheenvironmentalprotectionintothewholebusinessenterpriseoperatesprocessinordertocreateitsvalue.Theenvironmentmanagementisakindofmanagementcreation,isakindofactiveenvironmentmanagement,whichpromotesthemainsenseofenergyconservationandemissionmitigation.

简介：Precipitationstrengtheningaswellassolutionstrengtheningiskeymechanismforheatresistantsteels.Itisveryimportanttocharacterizetheprecipitatesin9%Crferriteheatresistantsteels,especiallytoshowthenanometer-sizedparticles.Bytransmissionelectronicmicroscopeattachedwithanenergydispersivespectrometeraswellasopticalmicroscope,scanningelectronicmicroscope,themicrostructureandchemicalcompositionofprecipitatesina9%Crheatresistantsteelafterdifferentheattreatmentswereinvestigated.ItwasfoundthatthemicrostructureofnormalizedsamplewasmartensitewithfineNbCandFe3C.Themicrostructureoftemperedsampleistemperedmartensite,andtheremainlyweretwotypesofprecipitates,M23C6withthesizerangeof50-300nmandMXwiththesizeof10-100nm.SuperfineM23C6precipitatedpreferablyonpriorausteniticgrainboundariesandmartensiticlathboundaries,whilenanometer-sizedMXprecipitatesweredistributedrandomly.Aftershort-termcreep,Lavesphaseformedalonggrainboundariesofthe9%Crsteel,andM23C6andMXprecipitateswerefoundtobecomecoarser.Moreinformationaboutprecipitatesinthe9%Crsteelhadbeenexhibitedbyatomicforcemicroscopy.Thereby,distribution,sizeandshapeoftheprecipitatesaswellastheircompositionsandstructureswererevealed.

简介：Sincetheexcessivecapacityinsteelmakingandcontinuouscastingatpresent,andthelimiteddevelopmentmarginofCCtechnologyandequipmentinscale,thefurtherdevelopmentmustbemadeinaprofoundanddetailizedway.ThispaperenumeratestheitemsofCCtechnologyandequipment,whichneedtobedetailizedfromseveralaspectssuchasrollarrangementdesign,equipmentdesignandproductionoperation,anditpointsoutthatdetailizationisthefuturedirectionofCCtechnologyandequipment.Theitemsinrollarrangementdesignincludeeliminatingperiodicmeniscusfluctuationbyadjustingspacebetweenrollsreasonably;takingspecialmeasurestoavoiddangerousregionsofcastingspeed,inordertoreducethecenterporosityandcenterlinecrackofslab;optimizingthemajorradiusandthelengthofouterarcofcasterbeforestraighteningpointtoavoiddangerousregionofcastingspeed.Theitemsinequipmentdesignincludechoosingasuitablestructureofsupportandguidingrollaccordingtotheconcreteconditionsofcaster;accordingtobulgingshapeofslab,thinkingmoreaboutrestrictionofshelltobulgingforce,discussingtheforceonrollers,optimizingsplitrolltosupportslab;safetyfactorshouldbeconsideredtogetherwithcalculationmethodofthebearingnominalstaticload.Theitemsinaspectsofcontinuouscastingoperationincludethedelicacydivisionandthefunction-positioningofoperationmodesforCCmachineduetotheconsiderationofdynamicsoftreduction;monitoringandcontrollingsystemofCCmachinemustbefurtherdetailizedtoimprovethestabilityofproductionoperationandslabquality.Inadditiontothethreeaspectsmentionedabove,thisarticlepointsoutmanyotheritemsalso,suchashomogenizationofsecondarycoolingofslab,qualitycontrolofsurfaceandinternalofslab,andsoon.Thisarticleemphasizes,somekeytechnologiesneedtoberesearchedalso,andalltheseresearcheswillneverstop.

简介：Thispaperintroducesworkingprincipleandtechnicalfeaturesofvacuumfilterinemulsionsystemfortandemcoldstripmill.Basedonspecificcases,thispaperanalysesandassessestheeffectbeforeandafterusingtheemulsionsystemwiththeusageofthevacuumfilterforstripmill.Comparewiththeeffectwhenusingthefirstgenerationvacuumfilter,theemulsionqualityisimprovedsignificantlybyusingthesecondgenerationvacuumfilter,whichatthesametimeensuressteadyoperationoftherollingmillandsurfacequalityofthemillproducts.Asaresult,investmentandrunningcostsarelowered,emissionsofthewasteemulsionarereduced,wastewatertreatmentcostsarereducedandsoastheenvironmentalpollution.Itcanbeseenthesecondgenerationvacuumfilterhasobviouseconomicandenvironmentalbenefits.Therefor,itsuggeststhatthefiltershouldbeusedwidelyinthefieldofautomotive,environmentalprotectionrollingsteelandnonferrousmetals.

简介：Basedonthecontinuoushot(aluminizing)galvanizinglinesandrelatednon-standardequipmentofMeishanSteel,thispaperpresentsthemaincontentsofsuchintegratedengineeringanddesigningofequipmentforthetwohot-dippedgalvanizinglines,aswellasinnovativetechniquesandtheirfeatures.LedbyColdRollingProjectDepartmentofMeishanSteel,BaosteelEngineeringandTechnologyGroupCo.,Ltd.,workingastheresponsibleunitofthisproject,developskeytechnologiesandintegratesthesystembycombiningtheequipmentdesignanddevelopmentcapacityofBaosteelEngineering,researchanddevelopmentcapacityofResearchInstituteofBaosteel,processproductionandequipmentmaintenanceexperienceofColdRollingPlant,EquipmentDepartmentandManufactureDepartmentofBaosteelCorporation.Coretechnologiesofthetwolinesaredevelopedanddesignedthroughoriginalandintegratedinnovationandinnovationafterdigestion,focusingoneightcoretechniquesinprocessequipment,annealingfurnace,fluidinstallationandEICsystem.Asaresultofintegrationinkeyprocessequipment,industrialfurnaceandEICcontrol,thecoldrollinghotdipped(aluminizing)galvanizinglinestakeonanewlookandreachanannualcapacityof200000tgalvanizedproductsand250000tgalvanizedaluminiumbasestripsrespectively.Thesetwoworldadvancedlinesareabletoproducehot-dippedgalvanizingproductswithhighqualitysurfaceandfineshape,suchashouseholdapplianceboardandseniorconstructionboard.Asaresult,theprocessandequipmenttechnologyofthelineshaveformeddomesticintellectualproperty.Thus,thetechnologyhasreferencevalueforself-integrationandequipmenttechnologyinnovationofsimilarlines.

简介：ThisstudysystematicallyreviewsandsummarizesrelocationandrevampingprojectofmediumandheavyplaterollingmillinBayiSteel.AfterdetailedanalysiswasmadeonthemaindeficiencyandproblemsoftheoriginalproductionlineofPudongSteel,systematicalintegrationandimprovementfortheprocessandequipmentwerecarriedoutaccordingly.Throughinnovativepracticeofintegration,BaosteelEngineeringhasgreatlyimprovedthetechnicalprocessandequipmentmake-up,aswellasthegradesandqualityoftheproducts.Theoriginalman-operatinglineisredesignedintoanautomaticsystemcontrolledbyLevel2computer,reachingtheadvancedtechnicallevelofhome-mademediumandheavyplateproductionlineinrecentyears.Theprojectisconstructedintwophases;TheoriginalproductmixofPudongSteelismaintainedasmuchaspossibleinPhaseI.After3500mmsinglestandfinishingmillisputintooperation,capacityofhot-rollingmediumandheavyplatereaches650000t/a,withthemaximumthicknessat40mm.Equipmentorfacilitiesarereservedforproductionofpipelinesteelandothergrades.Pipelinesteel,vesselplate,windpowerplateandotherTMCPandheattreatmentproductsareprojectedinPhaseⅡ.After4200mmroughingmillanditsmatchedfacilitiesareputintooperation,capacityofhot-rollingmediumandheavyplatewillreach120000t/a,withthemaximumthicknessat80mm.Throughtheoptimizationofprocessequipmentanditsfunction,therelocatedmediumandheavyplatemillproductionlinehasreachedadvancedlevelamongsimilardomesticmills.Theprominentachievementsoftheprojectaretherevampingofthicknesscontrolsystemofthefinishingmillandthenewlyinstalledshapecontrolsystem.Automationcontrolofthewholelineisrealized.

简介：Inthispaper,theflatnesscontroltechnologyAnShaperTMforcold-rollingmillandindustryapplicationareintroduced.AnShaperTMincludes;partitioningpiezomagneticshapemeterforflatnessmeasurementforcold-rollingstrip;flatnessmeasuredsignalsprocessingsystembasedondigitalsignalprocessing（DSP）;flatnessfeedbackcontrolmodelsystembasedonthecontrolefficiencyofflatnesscontrolactuatorsandmodeladaptivefunction.TheapplicationverifiesthatstripflatnesscanmeettheneedofhighqualityproductbyusingAnShaperTM.Theaverageflatnessqualityisabout5Ⅰ-unitandthe0.18mmultrathinthicknessstripflatnessis10Ⅰ-unit.

简介：Manyadvancedtechnologieshavebeenappliedindevelopingtheautomaticmeasuringdevicefortestingtransversethicknessdifferenceofcold-rollingsteelsheet,suchasthetechnologiesofautomaticcontrol,sensormeasurement,markingidentification,photographiclocation,computerapplicationandinformationtransmission.Thismeasuringdevicecanmeasurethetransversethicknessdifferenceofthesteelplateaccuratelyandquickly,withahighdetectionlevelofautomation.Itisaneffectivedetectionequipmentfortransversethicknesscontrolofsteelplate.Horizontalwidthofsteelplatemeasuring0.8-1.4m,horizontalmeasurementpointpositioningaccuracy±0.02mm,thicknessrange0.2-2.0mm,measurementaccuracywithin±1μm.

简介：Inthispaper,therecentstateandproblemsofthesinkrollinCGLaredescribed.Severalmethodsofincreasingitsoperationallifespanareintroduced,suchassurfacecoatingtechnologyandsleevematerialtechnology.Fundamentallytheycannotsolvetheproblemsofsurfacequalitycausedbythecontactbetweenstripandroll.Onthisbasis,thenewlydevelopedprincipleandsolutionsforhotdipgalvanizingtechnologywithoutsinkrollarehighlyemphasized,theyareFloatTechnology,Electromagneticpumptechnology,Electromagneticenclosedslotbyhigh-frequencyAC,Electromagneticenclosedslotbyhigh-frequencyDC.Acomparisonamongtheirfunctionsandcharacteristicsismadeandthepossibilityofitsapplicationisalsodiscussed.Finallyitcomestoaconclusionthatelectromagneticenclosedslotrepresentsthedirectionofacontinuoushot-dipgalvanizingsteelstripinthethe21stcentury.Ithasaverybroadapplicationprospects.BaosteelTechnologyCenterisfocusedontheresearchanddevelopmentofthistechnology.Astechnologyadvances,industrialapplicationsispossible.

简介：DuetofastdevelopmentofChinesesteelindustry,continuousadjustmentofproduct,improvementofquality,researchofvalue-addedproduct,RHtechnologyissignificantlydeveloped.MoreandmoresteelplantsarecoveredwithRHfacilities.RHratioisgrowingrapidlyaswell.Overpastdecade,throughassimilatingadvancedforeigntechnologiesandfurtherrefiningthem,ChineselargescalesteelplantsmasterthetechnologyofRHproduction,operation,maintenanceandmakeitmorewidespread.RHfunctionsarewellappliedandimproved.RHismorewidelyeffectivelyputintouse.Throughindependentinnovation,RHcoredevicesandtechnology,suchasRHvacuumpump,oxygentoplance,vacuumvesselpreheatinglance,ladleliftingdeviceetc.haverealizedlocalization.Thedevelopmentofequipmentdesign,softwaredesign,equipmentmanufacturingtechnology,equipmentmounting,testtechnologyandEPCmanagementmakesequipmentconfigurationmoreflexible,equipmentmorefunctionalandstable,easiertooperateandmaintain.Italsoguaranteeshighlyeffectiveandlowenergyconsumptionproductionandqualityofsteel,reachesinternationaladvancedlevel,lowersthecostofRHconstructionandoperation,makesafter-sakeservicemoreconvenient.HowtocontinuouslyoptimizeanddevelopRHprocess,equipmentandcontroltechnology,inordertomeettheneedsofproductwithmorereasonableandeconomicprocess,exploitpotentialities,buildmoreeffective,lowercost,lowerenergyconsumption,protectingenvironmentRHfacilitieswillbethekeypointoffutureRHtechnologydevelopmentinChina.

简介：Throughsummaryandextractionofcurrentsteelmakingdesign,processandequipmenttechnologiesandproductiontechnologiesfor300tgradeconvertersinBaosteel,thearticleanalyzesandelaboratesthesignificanceofindependentintegrationof300tgradeconvertersinZhanjiang,majortargetsoftheindependentintegrationinconverterprocesstechnologies,equipmentpackagesandcontrols,theinnovatedcriticaltechnologiesandcomparisonwithoverseasadvancedtechnologies,majortechnicaldifficultiesintheintegrationinBaosteelandtheirsolutions,aswellasgeneralmindsetandfinalobjectivesoftheproject.ThetotalintegrationoftechnologyforShanghaiNo.1SteelMakingPlantofBaosteelwasundertakenbyNipponSteel.AndKawasakiSteelwasresponsibleforthetotalintegrationoftechnologyfor4#and5#convertersofShanghaiNo.2SteelmakingPlantofBaosteel.Basedondigestion,absorptionandinnovationoftheintroducedtechnologies,Baosteelhasfirstlyachievedtheindependentintegrationof6#converter,5#RHand3#LFprojectsintheShanghaiNo.2SteelmakingPlantofBaosteel.Therefore,BaosteelshalltakeadvantagesofthefavorableconditionsandexperiencesandadvancedsteelmakingtechnologiesofBaosteeeltomastertheimportednewsteelmakingtechnologiesintheworldandthenformtheadvancedcompletesetsteelmakingtechnologiesandequipmentathomeandabroad.TheachievementofindependentintegrationofZhanjiangSteelMakingProjectwillmakethebreakthroughfortheconstructionoflarge-sizedsteelmakingplantinBaosteel.300tconvertertechnologyintegrationisundertakenbyBaosteelindependentlyininsteadofbytheforeignsideinthepast.

简介：ThispaperintroducesACvariable-speeddrivingcontroltechnologyapplicationinthecontinuousannealingline,includingthedrivesystemconfiguration,thedrivingcontrolcharacteristicsofCALandthemaincontrolfunctionsofthedrivesystem.Firstlyintroducesthemainprocessofthecontinuousannealingline,thefeaturesofthe6SE70seriescommonDCbusdrivesystemandtheG150seriesdrivesystem.Secondly,forthecontinuousannealingline,therearemorestrictrequirementsforthecontinuityofproductionandmorespecialrequirementsforthedrivecontrolcharacteristics.Wedoalotofimprovementandstandardizationforthedrivingcontrolfunctionsandtheinterfacesofthelineautomationcontrolsystem.Thispaperdiscussesthecommunicationinterfacespecificationsandthedimensiontransformationmethodsbetweenthedriveandthebasicautomationsystem.Thedetaildimensiontransformationmethodsandcalculationmethodaboutthelinespeedsettingandtheactualrollerdimensionsettingaregiven,anddetaildescriptionforthecalculationmethodofthereferencespeedinthedrive.Articlealsoemphasizedillustratesrealizingandtestingmethodsofinertiacompensationofequipmentinthedrives,andstandardizethevalueoflineaccelerateanddeceleraterate,andtheinertiatestmethodandinertiacompensationcoefficientcalculationmethodisintroducedinthispaper.Forthebridgerollersandfurnacehelprollersloadbalancecontrol,thispaperpresentstwodifferentloadbalancecontrolstrategies,theloadbalancecontrolprincipleforbridgerollerswhichdatacommunicatesfrommainstationtoslavestationsbySimolink,andtheloadbalancecontrolprincipleforfurnacehelprollerswhichusedroopcontrol.Thedifferentcharacteristicsofthosetwomethodsarestatedindetail.

简介：Loadingdistributionforheavyplatemillistofindoptimalcontrolsolutionsunderthegrantedperformanceindicatorsandconstraintsincludingmillcapacityandhypothesisofrollingmodels.Thesolutionsarequitedifferentfordifferentperformanceindicators.Inthearticle,theperformanceindicatorsandsequentialquadraticprogramming(SQPforshortbelow)methodsemployedin5000mmheavyplatemillofBaoSteelarepenetratinglyanalyzed.Generally,theSQPmethodisaneffectiveandfastwaytosolvethenonlinearprogrammingproblemswithsmallormediumscaleconstraints.Earlyin1976,HanputforwardtheSQPmethodforthefirsttimeandPowellmadeitperfectandaccomplishedthealgorithmin1977.Infact,SQPmethodwastoturnanonlinearprogrammingproblemtoaseriesofsubsetofquadraticprogrammingproblems.Inthealgorithm,eachiterationstepistosolveonequadraticprogrammingproblem.Theoptimalsolutionswillbegraduallyapproachedafterquadraticprogrammingproblemsweretotallysolved.Whensolvingthequadraticprogrammingproblem,theactivesetstrategywereemployedwhichturnedtheconstrainedquadraticprogrammingproblemtounconstrainedquadraticprogrammingproblem.Theactivesetstrategymadethewholequadraticprogrammingproblembesolvedbyaleastsquareproblem.Andfinally,thematrixoftheleastsquareproblemwouldbedecomposedbyQmatrixandRmatrix.AfterQmatrixandRmatrixwereobtained,theoptimalsolutionswouldbefinallyfound.Forloadingdistribution,theperformanceindicatorswerecomposedbyplateshapeanddraftofeachpass.Plateshapeisrepresentedbyrollingforcegraduallyreducedpassbypasswithatunablefactor.Themillcapacityisanotherperformanceindicatorrepresentedbydraftofeachpass.Forheavyplatemill,themillcapacityhereisthemotormoment.Forheavydraft,themotorwouldbeoverloadedespeciallyforthefirstseveralpasses;forsmalldraft,themotorwouldbeloadedslightly.Allthesewouldnotbepermittedtohappenwhen

简介：Furnaceareaisregardedaslooperbetweencastingandhotrolling,whichisveryimportantformaterialflowbalanceandproductionorganizationaswellastemperatureregulationetc.Inparticular,whendealingwithenergysavingandemissionreductionandheatingqualityimproving,pre_heatingfurnaceispaidmoreattention.Theradicaltargetforpreheatingfurnaceistotransferheatingenergyattheleastcost.Asweknow,thepreheatingfurnaceisadissipationsystemtoobeyconservationofenergylaw,thatistosaythatinputenergyalwaysequalstooutputenergy,inthemeantime,thewholeenergyconsumingisnotreversible.Thereforeincreasingtheefficiencyofusingenergyisuppermost.Inthispaper,heatingtransferefficiencyisanalysedandmathematicalexpressionisgivenbasedonconservationofenergylaw.Typicaloptimalmethodstoimprovepreheatingfurnacetransferefficiencycomingfromforeignfactoriesarepresented.Accordingtothesemethods,everyfurnacezonetemperaturesascontrolvariable,targetdischargingtemperatureandtemperaturedifferenceinslabthicknessandthetemperaturebetweenneighbouringzonesaswellaszonetemporarytemperatureasrestrictions,minimalenergyconsumingasoptimizingtarget.Baosteelpreheatingfurnacemodelstructureandthecomplicatedmappingrelationofcontrolparametersetandstatesetandaimsetarepresented.Importantbasicmodelsinthepreheatingfurnacemodelsystemareanalysedincludingtemperaturetrackingmodelandtemperatureforecastingmodelanddischargingpacingmodelandslabheatingcurve.Firstslabtemperaturemodelstructureanditsperiphericparameterareintroduced;secondtwopacingmodelsaregivenincludingtimingpacingmodeusingfixeddischargingintervalandmillpacingcontrolmodeusingmillrollingpacingwhileBaosteelpacingforecastingmodelusinglongtermandshorttermforecastingmode)isgiven;thirdaheatingcurvemathematicalmodelconsideringheatingqualityandrollingpaceandenergyconsumingispresented;

简介：High-strengthsteelshavebeenattractingmoreandmoreattentionofpeople,Unfortunately.deteriorationofductilitylimitedtheirapplications.Tosolvethisproblem,anano-structuredstainlesssteelsheetisdevelopedtocombinehighstrengthandhighductility.Processingofthesurfacemechanicalattritiontreatment(SMAT)wasintroducedtoobtainanano-grainlayeronthedoublesurfaceofthestainlesssteelsheet.Themicrostructureofthenanostructuredsteelsheetischaracterizedbyanalternatedistributionofcoarsegrainedlayerandnanocrystallinelayer.Thenthedualsurfacenano-crystallizedstainlesssteelsheetswereco-warmrolledat500℃.Theexperimentalresultsrevealthatthemechanicalpropertiesofthenanostructuredsteelexhibithighyieldstrengthintherangeof700-950MPaandtensilestrengthhigherthan930MPa.Moreover,elongationtofracturereachesto15%-48%,togetherwithauniformelongationstabilizedto13%-45%.

简介：Intwin-rollstripcastingprocess,transportphenomenaoffluidinthemoltenpooldirectlyaffecttheprocessstabilityandthequalityofproducts.Inordertoelucidatethefundamentaltransportphenomenaintwin-rollcasting,acommercialsoftwarecalledProCASTwasemployedtosimulatethetransientfluidflowandlevelprofilebehaviorsduringtheearlystageoftheprocessinthisstudy.Thecoupledsetofgoverningdifferentialequationsformass,momentumandenergybalanceweresolvedwiththefiniteelementmethodandthetransientfreesurfaceproblemwastreatedwithavolumeoffluids(VOF)approach.Theeffectofdifferentdeliverysystemsconfigurationonflowpattern,levelprofileinthepoolwasstudiedandanalyzedinthispaper.Thenewwedgemetaldeliverysystemshavebeenoptimizedforthetwin-rollstripcaster.Itwasshownthatnewtypemetaldeliverysystemshadapreferableeffectontheuniformdistributionoffluidandlevelfluctuationinthepool.Thesimulationresultsalsoprovideavaluablebasisfortheoptimizationofdeliverysystemandprocessparametersduringtheinitialpouringstage.

简介：Thisarticleistrytoexplainoranalyzethekeytechnologiesofcontrollingthesurfacequalityoflowcarbonsteelascaststripthroughinvestigationofinterfaceheattransferbetweensolidifiedshellandliquidsteel.Theoneofthekeytechnologiesofcontrollingsurfacequalityoflowcarbonsteelascaststripisthroughthecastingrollsurfacetextureinordertoachievethehomogeneoussolidificationonthecastingroll.Anotheristhroughformingathinfilmonthecastingrollsurfaceinordertoachieveabalancebetweenrapidsolidificationandhomogeneoussolidification.Thisfilmformedbetweenthetwinrollandthemoltensteelcanbecontrolledbyadjustingthechemicalcompositionandinclusioninliquidsteelthroughcontrollingtheamountofall[O]andfree[O].

简介：Usingmetallographicobservationandmechanicalmeasurement,themicrostructureandmechanicalpropertiesofGH4169Galloyhasbeeninvestigated.Theeffectofthephosphorus,borontraceelementsonmechanicalpropertiesoftheGH4169Galloyarecomparedandanalyzed.Theresultsshowedthatthehot-workabilityoftheGH4169Galloyisverygood.ThestressrupturespropertiesofGH4169Galloyisover3timesthanthetraditionalGH4169alloy.

简介：SomenewNi-saving25Crduplexstainlesssteels(DSS)havebeendeveloped.Theresultsindicatethatthealloyhasabalancedferrite-austeniterelationafterhotforgeandsolidsolutiontreatmentat1000℃.TheelementsWandCuhaveamarkedeffectonthemicrostructureofthealloy.ThepittingpotentialofthesteeladdingWandCuelementsreachesthemaximumvalueof435mV.Thetensilestrengthandpercentageofareareductionofallsteelsinthispaperare800-900MPaand60%-70%,respectively.Thetensileelongationsofthealloysareallabove30%.Theexperimentalsteelshavegoodcorrosionandmechanicalproperty.

简介：DSShavehighstrength,highcorrosionresistanceandgoodweldingproperties.Comparingwiththesamecorrosionresistancelevelausteniticstainlesssteel,DSSdecreaselargelyNicontentandrealizethethinningofthicknessdesigntoperfectlyoptimizepropertiesanddecreasecosts.NowDSShavebeenwidelyusedinmanyfieldssuchaspetroleum,chemicalindustry,paperproduction,shipbuilding,nuclearpower,seawaterdesalting,vacuumsaltproductionandarchitecture.TiscohavebegantheprocessdevelopmentandproductapplicationresearchofDSSproductsfromlastcenturyandgraduallysolvedalotoftechnicalproblemssuchasAODnitrogenalloyingcontrolofvariouscontentDSS,hightemperaturedeformationmechanismofthermalprocess,largedeformationhotrollingprocessofcoils,theeffectofbadphaseprecipitatedduringhottreatmentprocessonpropertiesandhighefficiencypicklingofhighCr/MocontentDSSplates.ThevariousalloycontentDSSplatesandwidecoldrollingcoils(3Re60,S32101,S32304,S31803,S32205,S32750andSUS329J4L)weresuccessfullydevelopedandusedinnationalimportantconstructions,keyindustriesandabroadprojects.