简介：Non-metallicinclusionisthemainreasonforthepresenceofsurfacedefectsincold-rolledsteelstrip.Inthisstudy,thecomposition,morphology,andsizeofthenon-metallicinclusioninhot-rolled304stainlesssteelstripsareanalyzed.Cold-rolled304stainlesssteelstripswithdifferentcold-rollingreductionhavebeenprepared,andthemorphologyandsizeofinclusioninthesecold-rolledstripsarealsoanalyzed.Furthermore,thedeformationbehaviorofanon-metallicinclusionduringthecold-rollingprocessisstudied.TheresultsshowthatCaO-SiO2-MgO-Al2O3,akindofbrittlecompoundoxide,isthemaintypeofinclusioninhot-rolled304stainlesssteelstrips.Duringthecold-rollingprocess,ductiledeformationofthistypeofinclusionisnotobvious,wherelargeinclusionsarecrushed,andtheaveragesizeofinclusionsincold-rolledstripsdecreasedwhilethecold-rollingreductionincreased.

简介：SUS304stainlesssteelistypicalofausteniticstainlesssteel,whichorganizationismetastableaustenite,easilyappearsworkhardeningincoldrolling.Accordingtothecommonprocess,themaxreductionofcoldrollinginonestageisbelow80%,wetrytorasiethemaxreductionto90%inonestage(wecalledthat'greatreduction')fromtheviewofcutingcost.Duetotheworkhardening,greatreductionbringslotsofproblem(thedifficultyofflatnesscontrol,stripbreak..etc)。ThisarticleanalyzedthegreatreductionfromproperityofSUS304steel,milltypes,flatnesscontrol,rollingtechnicsetc,suppliedthecorrespondingsolutions,andformedasophisticatedgreatreductiontheory.Thisarticlefocusesontheunusualthermalcrownofrawmaterials(ie,abnormaldistributionofhorizontalthickness)andtherollingforcefluctuationsin'greatreduction'rolling.First,the'distortion'phenomenonwhichcausedbyunusualthermalcrownofrawmaterialsisexplained,wedge-shapedstripIncoiling,becauseofabigdifferenceinthicknessonbothsides,leadstodifferentcompressivestressonbothsidesofflatnessroll,sothattheflatnessmeasurementisdistorted;Second,the'stripshifting'phenomenoncausedbywedgeshapeofstripisexplained,weanalysisthestressonbothsidesofthestrip,concludedthatthewedge-shapedstriponthecoilerwillshifttothethicksideofthedeviation,theamountofstripshiftingisrelatedtothewedgelevel;BecauseofthecharacteristicsofSUS304,thestripisdifficulttoberolledinthelastfewpasses.sothestripbreakingiseasilyoccurred,wefoundthereasonableparameters(rollingspeed,coolingoil,tension,etc)tosolutethatproblem;Thedeviationofrollingforcewillcausetheshapeoftherollgap,thusaffectingtheshapecontrol,especiallyintheheadandtailpartofthestrip,Itisimportanttominimizethedeviationofrollingforce;The'greatreduction'processprovidethefavorableflatness(<8I-unit)andthicknessdeviationwhichlessthan±3um,withnosi

简介：对1号高炉炉体状况做了阐述．并提出了解办法。利用2006年8月份高炉检修时机，实施了喷补造衬、钢砖灌浆、炉皮挖补、安装铜冷却柱、铁口压力灌浆等技术。由于停、开炉及施工方案制定合理．实现了安全停炉和快速恢复的目的，为今后酒钢高炉新技术的应用进行了有益的尝试。

简介：针对冷轧304不锈钢表面微裂纹缺陷,通过系列分析和工艺试验表明,裂纹内不铜含量相比正常不为升高,调查发现热轧精轧机采用的铜导卫是铜的主要来源,也是导致微裂纹的主要原因。

简介：对304不锈钢2B板表面边鳞缺陷进行扫描电镜和能谱分析,并结合其整个生产工艺参数分析,得出铁素体当量高是导致边鳞缺陷发生的主要原因。根据上述原因提出了相应的改进建议。

简介：Twothermo-mechanicalcontrolledprocesses(TMCP)includingcontrolledrollingandacceleratedcoolingareproposedfortheproductionofheavygaugeSUS304Lausteniticstainlesssteelplateswithdifferentstrengthsandothercharacteristics.BasedontherecrystallizationmechanismandcarbideprecipitationbehaviorofSUS304Lausteniticstainlesssteel,TMCPprovidesapowerfulmeanstocontrolthemicrostructureandprecipitationofthehotrolledsteelplatebythecontrolledrollingandacceleratedcoolingprocess.Thedislocationdensityandgrainsizearethemainfactorsindeterminingthestrengthofthestainlesssteelplates.Therefore,itisnecessarytostrictlycontrolthehotrollingparameters,includingparameterssuchasthefinishhotrollingtemperatureintherecrystallizationtemperatureregionandthetotalreductioninthenon-recrystallizationregion.Furthermore,inordertoavoidcarbideprecipitationandguaranteetheintergranularcorrosionresistanceofTMCPSUS304Lausteniticstainlesssteel,acriticalcoolingrateafterrollingisdetermined.

简介：Toavoidintergranularcorrosionandobtainmicrostructuralhomogenization,theconventionalSUS304austeniticstainlesssteelneedstobesolutionannealedafterhotrolling.Thisstudyinvestigatesthethermal-mechanicalcontrolledprocess(TMCP)ofSUS304steel,especiallythecontrolledrollingandonlineacceleratedcoolingprocedures.Theobjectiveofthisresearchistoreduceorevenpreventcarbideprecipitationbasedonthedescriptionofthetime-temperature-precipitation(TTP)curve.Thedynamicandpost-dynamicrecrystallizationbehaviorsofthissteelensuredthehomogenizationofgrainsinthisprocessdueto,whichwasstudiedbythehotcompressiontests.ThemicrostructureandthepropertiesoftheTMCP-producedSUS304steelstripwerecomparedwiththeconventionalmethodofsolutionannealing.Basedontheaboveresults,thenewlydevelopedTMCP-producedSUS304hot-rolledausteniticstainlesssteelstriphasbeensuccessfullyproducedanditcanbedirectlyutilizedinthecoldrollingprocesswithoutsolutionannealing.

简介：尽管欧洲中部地区的用户对不断上涨的合金附加费不满，但对不锈钢薄板的需求却持续增长。

简介：Theeffectsofthesubstratetemperatureonthedepositionandmicrostructureofthe304stainlesssteel(SS)coldgasdynamicspraying(CGDS)coatingswereinvestigated.Itwasfoundthatthehighersubstratetemperaturecouldincreasethedepositionrateofthe304SSparticles,eventheoxidefilmsexistedattheinterface.Therewasacriticaloxidefilmwithathicknessof3-4μmwhichcouldbedestroyedbytheimpactedparticles.Themicro-hardnessandmicrostructureofthe304SScoatingsunderdifferentsubstratepreheatingtemperatureswerealmostthesame.

简介：本文通过将SUS304、SUH409L、06Cr13三种不锈钢在35℃,6%FeCl3＋HCl的混合溶液中进行点腐蚀试验,将腐蚀后腐蚀速率、宏观特征、微观组织特征、形貌特征等进行了阐述及对比,并根据化学成分、微观组织结构、腐蚀后的形貌特征等进行了腐蚀原因分析。