简介：Ultrafastcoolingisanewtechnologywhichusedtocontrolthehot-rollingstripcoolinginrecentyearsontheinternationaldeveloped.Ifsuitablycooperatedwithanumberofothernewcontrolledrollingtechnologies,canachievefastandaccuratetemperaturecontrolinthehot-rolledstripproductionprocesstoobtaincorrespondingtransformationmicrostructureandidealmechanicalproperties.Thisarticledescribesthetechnicalprincipleandlayoutofultrafastcoolinginhot-rolledaswellasapplicationprofilesinthemajorironandsteelenterpriseinChinaandabroad.Carriedoutthelayoutofultrafastcoolinganalysisontheadaptabilityofsteelthatinstallbetweenthefinishingmillandlaminarcooling,onthisbasis,proposedtheuseofultrafastcoolingtechnologyproposals.

简介：Ultrapureferriticstainlesssteelhasmoreadvantagesintheperformancethantheordinaryferriticstainlesssteelbecauseofultralowcarbonandnitrogencontent,suchascorrosionresistance,toughnessandweldability,etc.Suchsteelhasthereforebeenappliedinmanyfields,leadingtotheveryrapiddevelopmentoverthepast40years.Thisstudyfocusesonthesecondaryrefiningprocesswhichisthemostimportantstepofthewholesteelmakingprocessfortheultrapureferriticstainless.Firstly,somedifficultiesofthesecondaryrefiningprocessaredescribed,includingthehighpurificationintermsofbothcarbonandnitrogencontents,highefficientandstablecontrol.Secondly,thedevelopmentandprogressofthesecondaryrefiningtechnologyforultrapureferriticstainlessisintroducedintermsoftherefiningequipments,metallurgicalprocessandassistanttechnologies.Finally,theprospectwasmadeforthedevelopmentofsecondaryrefiningprocessforultrapureferriticstainlessinthefuture.