简介：Understandingthetransformationofliquidsteeltosolidsteelisthemostfundamentalaspectofcontinuouscasting;however,itremainsacomplexsubjectwithanumberofunresolvedissues.Inthispaper,thefollowingaspectsofmoldoperationwhichgiverisetosub-surfacedefectswillbediscussed;meniscussolidification,surfaceandinterfacialenergies,effectsofgasbubbles,andthedynamicnatureoftheliquidslag-liquidsteelinterface.

简介：Thepaperintroducesrefractoriesforcontinuouscasting,especially,refractoriesforcontinuouscastingforcleansteelinbaosteel.Developingdirectionofrefractoriesforcontinuouscastinghasbeenpointedouttosatisfythenewmetallurgicaloperatingpractice.

简介：ZK60合金在下面的微观结构常规直接同样扔(DC)，扔的成双的转动(TRC)和扔由热压缩(TRC-HC)跟随了的成双的转动被光形态学(OM)分析，电子反散射衍射(EBSD)和X光检查衍射(XRD)。热压缩的变丑条件是350?婧??????′8

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简介：MonolithicrefractoriesforBFtroughlininghavebeenpaidmoreattentionastheydirectlyaffectironmakingproduction.Inpresentpaper,theevolutionofBFtroughlingingrefractories,factorsaffectingserviceperformances,installationmethodsandevaluationmethodsinlaboratoryhavebeenintroducedandaseriesofnewdevelopedmonolithicorBFtroughliningshavebeendescribed,includingmaterialscombination,propertiesandserviceperfromances,Someviewpointsondevelopingtrendsinthisfieldhavealsobeenpointed.

简介：Inordertoresearchthetemperaturedistributionandmechanicaldeformationofslabbulgingduringhighspeedcontinuouscasting,mathematicalmodelshavebeendevelopedtoanalyzethethermalandmechanicalbehavioroftheslab.Thethermalhistoryoftheslabhasbeenpredictedbyatwo-dimensionaltransientfiniteelementheattransfermodel,whoseresultsserveastheinputtothestressmodel.Thestressmodelhasbeenformulatedforatwo-dimensionallongitudinalplane.Inthiscase,themaximumtensilestrainduringthebulgingprocessislocatedatthesolidificationfrontjustpastthetopoftheupstreamroll,whichmaycontributetocrackformation.Themaximumtensilestressesarelocatedatthecoldsurfaceinthemiddleofthetwoback-uprolls,justatthepointofthemaximumbulging.Stressesnearthesolidificationfrontaresmallbecauseofthehightemperatureswhichproducelowerelasticmodulusvalues.Finally,theeffectofthecastingspeedonthebulgingdeformationisdiscussed.

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简介：ＯＮα－ＢＬＯＣＨＦＵＮＣＴＩＯＮＳＡＮＤＶＭＯＡ￥（赵如汉）ＺｈａｏＲｕｈａｎ（ＷｕｈａｎＩｎｓｔｉｔｕｔｅｏｆＭａｔｈｅｍａｔｉｃａｌＳｃｉｅｎｃｅｓ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｗｕｈａｎ４５００７１，Ｃｈｉｎａ）Ａｂｓｔｒａｃｔ：Ｉｎｔｈｉ...

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简介：WhataretheoriginsoftheverydistinctiveancientChinesebronzes?ThequestionhaslongbeendebatedamongscholarsandthispaperattemptstoinvestigatethisdifficultanddemandingquestionbyexploringtheearlymetalobjectsdiscoveredthrougharchaeologythroughoutChina.Theterm‘earlymetals’referstoallpre-Shang(pre-16thcenturyBCE)metalobjectsfoundinChinathataremadeofpurecopper(hongtong红铜,Cu),brass(huangtong黄铜,Cu-Zn),arseniccopper(shentong砷铜,Cu-As)andbronze(qingtong青铜).Theterm‘bronzes'(qingtongqi)refersspecificallytothosedistinctivepiecesmadeofcopper-tin(Cu-Sn),copper-lead(Cu-Pb)andcopper-tin-lead(Cu-Sn-Pb)alloys.

简介：ＴＨＥＣＯＮＴＩＮＵＯＵＳＣＡＳＴＩＮＧＰＲＯＢＬＥＭＷＩＴＨＮＯＮ－ＥＱＵＩＬＩＢＲＩＵＭＣＯＮＤＩＴＩＯＮＳ￥（吴少华，刘祖汉）ＷｕＳｈａｏｈｕａ（Ｄｅｐｔ．ｏｆＡｐｐｌ．Ｍａｔｈ．，ＷｕｈａｎＵｎｉｖ．ｏｆＨｙｄｒａｕｌｉｃａｎｄＥｌｅｃｔｒｉ...

简介：Theresearchdevelopmentonnewdryvibratingre-fractories,magnesiabasedslagdamandbubblecurtainbarricadeforcontinuouscastingtundishwasintroduced.

简介：一个方法基于死扔实验，数学建模在高压力期间为热流动密度(HFD)和界面的热转移系数(IHTC)的决心被介绍死扔(HPDC)process.Experiments用步形状扔和商业镁合金被执行，AM50.Temperature侧面被测量并且记录了使用在die内嵌入的热电偶。基于这些温度读物，HFD和IHTC成功地被决定，计算结果证明在金属死的HFD和IHTC连接在快阶段注射进程以后严厉地正确的增加直到接近他们的最大的值，在哪个以后他们到直到dies低级的大部分的值减少被打开。热转移行为的不同模式在die并且在不同厚度扔之间被发现。扔越薄，HFD和IHTC越快速到达了他们的稳定的状态。另外，为HFD和IHTC值的值是不同的在之间死并且在不同厚度扔。

简介：Inthebeginningissueof2016,China'srefractoriesinvitedDr.ValeriyMartynenko,thedirectorofUkrainianResearchInstituteofRefractoriesnamedafterA.S.Berezhnoytobetheexecutiveeditor-in-chief.Itisarealinternationalissue.EightpapershavebeenpresentedbyresearchersfromUkraine,Canada,CzechRepublic,Brazil,IsraelandRussia.Twopapers

简介：ASiC/2024compositewasmadebysemisolidcasting.ThewettingbetweenSiCandAlmatrixisimprovedbytreatingSiCparticlesatahightemperature,coatingK2ZrF6,andaddingMgtotheAlmelt,AneffectivewaytoremovethegasaroundSiCparticleswasalsofound.Microstructureswereobservedunderopticalmicroscope(OM)andscanningelectronmicroscopy(SEM).TheresultsshowthatSiCparticlesandAlmatrixarewellbondedandnogapsorcavitiesaroundtheparticlesareobserved.SiCparticlesdistributehomogeneouslyintheAlmatrix.TheexistenceofSiCparticlesresultsintheincreaseofwearresistanceandstrength.

简介：Duringtheingotcastingprocess,theparametricchangesofthemoltensteelpouringprocessoftencausebothingotsurfaceandinternalqualitydefects.Withtheincreasinglywideapplicationofcomputersinindustrialtechnology,numericalsimulationsofthemoltensteelpouringprocessenablepredictionsofthedefectsthatwillariseduringthepouringandsolidificationprocess,especiallyforthemoltensteelflowduringtheearlystagesofcasting.Inaddition,usingacomputertosimulatethecastingprocessofa40tingotandsolidificationcanpreventmanydefects.Thesimulationresultsindicatethatcontrollingthepouringspeedtolessthan80kg/s,hangingthecastingpowderinamoldwiththehangingheightmaintainedat100-150mm,andcontrollingthetaperangleofthemoldbrickoutlettoasuitablelevelcanreducetheprobabilityofslagentrapmentandimprovetheinternalandsurfacequalityoftheingot.

简介：Thecenterlinesegregationincontinuouscastingsteelisknowntobeformedbytheinterdendriticenrichedliquidflowatthesolidificationendinstrand.Atpresent,severalmethods,suchasthermalsoftreduction,electromagneticstirringanddynamicsoftreduction,areavailabletoreducethecentersegregationandtoimprovetheinternalquality.Althoughsomemethodscouldalleviatecentersegregationtosomeextent,theycanalsogiverisetonewproblems.Forinstance,thermalsoftreductioncanleadtosurfacecrackingduringcastingofsomesteelsandelectromagneticstirringcanresultinwhiteband.Dynamicsoftreductionisaneffectivetechnologyfortheimprovementofstrandqualityincontinuousslabcasting.Inthispaper,thekeyparametersofdynamicsoftreductiontechnology,suchassoftreductionregion,thetotalreductionamount,forlowcarbonsteelhavebeenstudiedbasedonexperimentalandtheoreticalanalysis.Thesoftreductionregionwasrelatedtothesegregationofchemicalcomposition,slabbulgingofnarrowsideandavoidinginternalcrackofslab.Thetotalreductionamountwascomposedofnaturalthermalshrinkageandactualreductionamountdependingoncriticalstrain.Forlowcarbonsteelwithslabdimensionof(950-1950)mm×170mm,thesolidfractionrangeinsoftreductionregionwasrecommendedfrom0.4to0.8,thetotalreductionamountwas2.0-2.8mm,andtheoptimizedreductionratewas0.4-1.2mm/min,respectively.Furthermore,adynamicsoftreductionsystemincontinuousslabcasting,VisualCast-Dynamic,hasbeendevelopedbymultithreadingmethod.Itdemonstratedthatthedynamicsoftreductionmodelinthisstudywascorrectwiththeabilityofonlinecontrol.