简介:WearofazirconiagraphiteslagbandmaterialbymoldslagduringcastingofaTRIPsteelgradewasinvestigatedonwornspecimenswithrespecttocorrosionanderosion.Corrosiondissolutionofboththestabilizeroxideandthezirconiaisdecisive.Oxidationisdominatinggraphitewearwhereasapossibledissolutionintheliquidsteelwasnotobservedtoplayanimportantrolehere.Theratioofoxidecorrosiontographiteoxidationdecreaseswithdecreasingverticaldistanceofthehotfacetothesteelbath.Unfortunatelyandcontrarytootherapplicationsofcarbonbondedrefractoriesinsteelindustrygraphiteexhibitstobewettedbymoldslaginthespecialcaseinvestigatedhere,itstillactsasarefractivecomponent,butonlypartlyasaninfiltrationinhibitor.Infiltrationisfollowedbyzirconiacorrosionthusreducingerosionresistance,butneverthelessalsogasphasetransportofslagcomponentsmaycauseexsolutionofthestabilizeroxideinun-infiltratedregions.
简介:TheSENforthinslabcon-castingiseasytobreakanddamagebecauseoftheoxidationduringpreheatingandapplication.TheenamelcoatingmaterialisgenerallyappliedonthesurfaceofSENtoavoidtheoxidation.Thecoatingmaterialwithbornglassandsiliconasmainstartingmaterialsandsilicasolasbinderwasstudied.ZrO2-CandAl2O3-Cmaterialscontaining15%carbonwereisostaticpressed,andheatedat600℃,900℃,1200℃,1500℃for2h,respectively.Theresultsshowthatthecoatingmaterialwith70%ofboronglassand30%ofsiliconbondedbysilicasolcanformdenserprotectionlayerintheabovementionedmaterialsattherangeof600-1500℃.Theoxidationarearatioandweightlossratiowiththecoatingaremuchlowerthanthosewithoutthecoating.
简介:哇!有金子掉下来啦,不信,看看……就知道了,在哪里?呵呵,在附件中哦!当你收到有类似诱惑性内容的电子邮件时,要注意“重要文件”病毒变种B,此变种的带毒附件有“易趣购物,请查收”字样,当用户不慎打开它时,就会感染一个文件名名ILoveYouipg的图片病毒,从而造成各种信息泄露,电脑死机和网络堵塞。