The production and practice of cold-rolled steel sheets for automobile

(整期优先)网络出版时间:2010-06-24
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ShougangGrouphascarriedoutastrategicstructureadjustmentinordertorealizethepromiseofChinesepeopletotheOlympicGames.Automotivesheetsarechosenasatypeofstrategicproductandanenginetoupgradeenterprisemanagement,technologyandoperationtoreachthetopinternationallevelduringthetransitionfromlongproductstosteelsheetsinShougangGroup.Since2006,ShougangGrouphasmadeanelaboratepreparationonsteelsheetculture,productionlineconstruction,technologyimport,pilotplantandtalentreserve.Itlaysthefoundationforthedevelopmentofautomotivesheets.Thedevelopinghistoryofcoldrolledautomotivesheetsisreviewedandtheresearchanddevelopmentofcoldrolledautomotivesheets,tacklingkeyproblemofdefectonsurfaceandthelatestprogressofautomotivesheetsconstructionaredescribedinthispaper.Themaincontentsweregivenasfollows:①TheproductsofautomotivesheetsrealizezerobreakthroughinShougangGroup.Monthlyoutputwas300toninJanuary,2009anditincreasedto48000toninJune,2010.TheratioofIFsteelsheetsincreasesto70%from40%.Theproportionofoutsidepanelinautomotivesheetsoccupysmorethan15%.②Ahighemulationalpilotplantisusedasaproductdevelopingplatformtodevelopsuccessfullyautomotivesheetswith1000MPaandbelow.ItguaranteesthattheindustrialdevelopmentofDPandTRIPsheetsgetssuccessatatime.Itcoverscontinuousannealingsheetswithtensilestrength≤780MPaandgalvanizingsheetswithtensilestrength≤590MPa.③Inpidualdesignisusedtomeetspecialrequirementofcustomer.Shougangowns23innerbrandsofLCAKandIFsteels.Itinsuresthatthegradesofyieldstrengthcoverwholerangefrom120to270MPa.Itkeepsthestabilizationofsteelperformancebymeansofchemicalcompositioncontrolandhighaccuracyrollingtechnology.Forexample,thestrengthofsoftsteelfluctuateswithin±15MPa.④ThesteelsheetswithsurfacegradeO5areproducedsteadilybysolvingformingstr