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简介：ThelargestREconsumerinChinaisthefoundryindustry.Statisticsshowthat46.3%ofthetotalREconsumptionwasusedascastironadditionsin1988.TheamountofREappliedincastinginallthesteelplantsincreasedtwiceinthepasttenyears.Manysparepartsformetallurgicalma-chineryincludingwearingpiates,grin-dingballs,sludgepumps,carriersofsin-teringmachine,ingotmolds,rolls,draw-ingheads,guides,pipes,cylindercasings,gears,etc.,aremadeoutofRE-treatednodular-,vermicular-,andgraycastiron,

简介：SixthinsectionsofspheroidalgraphitesincastironhavebeeninvestigatedbyTEMandSEM.ThespheroidalgraphitesconsistoftwoorthreelayersandhavenucleiwhicharecomposedofCe2O2SandCe2O3.Ceriumisexistedontonlyinnuclei,butalsoincentrallayerandmiddlelayerofgraphite.

简介：ItisreportedthattheoutputofREtreatedsteelreached340490tonsinChinain1990,whichwassharedbymetallurgicalindustrywiththeproductionof310089tons(21.6%increasefrom1989),machineryindustry23749.8tons,railwayindustry6665tonsandmilitaryindustry766.8tons.TheadditionofREelementsintosteelimprovesmorphotropy

简介：摘要广东省某污水处理厂目前已完成第三期的建设运营，运行规模为5万吨/日，采用CAST工艺+纤维滤盘过滤进行污水处理，本文主要探介绍了该污水处理厂三期系统CAST工艺的培菌调试过程和运行控制参数，通过合理调整CAST工艺的污泥龄、污泥负荷、曝气时间、沉淀时间、滗水高度及滗水器的调节灵活性等因素等工艺参数，使CAST工艺系统的出水水质达到了设计要求，为同工艺的污水处理厂试运行调试提供了一定的参考价值。

简介：Toimprovewearresistanceofsurfacewillincreasetheservicelifeofgraycastirondirectly.ThispaperpresentsthatgraycastironsurfacecoatedwithalloypowderislocallyremeltedbyTIGarctoincreasethewearresistance.Theinfluencesofarccurrentandscanningrateetconsurfacepropertiesarefound.Underdifferentconditions,themicrostructure,hardnessandwearresistanceofremeltedlayerareanalyzedandmeasured.TheresultsindicatethatthegraycastironsurfacecanbestrengthenedbyTIGarclocalremeltingtreatment.Especially,surfacealloyinghardeningeffectisbestandsurfacepropertiesareimprovedremarkably.

简介：ToimprovethewatertreeresistanceofPE,linearlow-densitypolyethylene(LLDPE)wascompoundedwithsodiumacrylate(NaAA)forinsitupolymerization,inwhichNaAAwasformedthroughtheneutralizationofacrylicacid(AA)withsodiumhydroxide(NaOH)beforeaddingdicumylperoxide(DCP)toinitiatetheinsitugraftpolymerizationandhomopolymerization.AseriesofLLDPE/NaAAcompoundswereinvestigatedfortheirwaterabsorptionratio(WAR)measurement,watertreeing,mechanicalanddielectricproperties.TheresultsstronglysuggestthatNaAAcanimprovethewatertreeresistanceofLLDPE.Inaddition,theLLDPE/NaAAcompoundspossesssatisfactorymechanicalpropertiesanddielectricproperties.CharacterizationofLLDPE/NaAAcompoundsbyusingFouriertransforminfraredspectrometry(FTIR)suggeststhattheneutralizationandpolymerizationreactioncouldbeachievedeffectively.UsingadequateDCPcontentisthekeyfactorforcontrollingthepolymerizationofNaAAwithpreciseconversionratio.

简介：客观：学习在胸方法的ductalcarcinomainsitu的作为一个预示的因素的组织学的分级的意义：根据凡·奈鈥檚分类，胸的ductalcarcinomainsitu(DCIS)的32个盒子被划分成三个组。结果：低等级(很好区分的、低等级DCIS)12个病人(37.5%)；中间的等级，9个病人(28.1%)；高等级(糟糕区分的DCIS)11个病人(34.4%)。在高等级DCIS之中，histologic子类型是粉刺(9个病人)，micropapillary(1个病人)和固体(1个病人)。在高等级DCIS的积极表示ofc-erbB-2，p53和MIB-1在中间、低的等级DCIS比那高。高等级和低等级DCIS之间的差别是重要的(P<0.05)。表示嗯在高等级，DCIS在中间、低的等级DCIS是比那低的。结论：胸ductalcarcinomainsitu的组织学的分级可以是一个好预示的因素。

简介：摘要本文以某污水处理厂CAST工艺为研究对象，着重对氮、磷等污染物指标的稳定达标进行调控分析，提出可行的工艺调控与优化运行方案。

简介：一个专业化电气化学的测量房间被插进一个飞行员水分发系统模仿管子内部墙的腐蚀。线性polarisation抵抗(LPR)技术和电气化学的阻抗光谱学(EIS)在实时被测量学习腐蚀率(CR)和生铁的规模的变化。三个腐蚀阶段根据LPR分析被观察：有显著地波动的CR的一个起始的阶段，有慢慢地减少的CR的一个发展阶段，并且有约0.1575公里的低CR的一个稳定的阶段?晡整?潖摮镲??鲹秪琀牥獩楴?畣癲?湡污獹獥?敒?瑬?桔?敲畣牲湥散朠潲灵攠桸扩瑩摥猠杩楮楦慣瑮祬栠杩敨??楤敭?倨??????湡???倨???????敬敶獬愠摮愠琠敲摮琠睯牡?楨桧牥瀠慬整敬?敬敶獬???????桔?灯楴慭?畣潴晦瘠污敵?敷敲ㄠ??e并且衰退emission-to-output比率在动态综合气候经济模型，描述了投射的碳排放是有艾尔2包含锡的O3-MgO-TiOx核心被发现是？？

简介：AmedicalcastCoCrMoalloywascoatedbyplasmanitridingprocesstoenhancethewearresistance.Themicrostructures,phasesandmicro-hardnessofnitridedlayerswereinvestigatedbyatomicforcemicroscopy(AFM),scanningelectronmicroscopy(SEM),X-raydiffraction(XRD)andmicro-hardness.Tribologicalpropertieswereinvestigatedonapin-on-discweartesterunder25%bovineserumsolutions.Theexperimentalresultsshowedthatplasmanitridingwasapromisingprocesstoproducethick,hardandwearresistantlayersonthesurfaceofCoCrMoalloy.TheharderCrNandCr2Nphasesformedontheplasmanitridedlayerwiththecompactnano-crystallinestructure.Comparedwiththeuntreatedsample,allnitridedsamplesshowedthelowerwearratesandhigherwearresistanceatdifferentappliedloadsandnitridingtemperatures.Itwasconcludedthattheimprovementofwearresistancecouldbeascribedtotheformationofthickerandhardernitridedlayerswiththespecificmicrostructuresonnitridedsurfaces.

简介：Theservicelifeofrefractoriesinladlewallsislimitedbycorrosion,abrasion,thermalshockandstructuralspallingmechanisms.Whentheladleislinedwithbrickstheytypicallyneedtobecompletelyremovedafteracertainnumberofheatstobereplacedbynewbricksofthesamesizeastheoriginalbricks.Notsoformonolithicladlelinings.Attheendoftheirservicelifetheremainsofthecastablecanalmostcompletelyberecycledastheycaninfactstayinplace.Onlytheworn-outpartofthelininghastobereplacedbyanewcastable.20%-50%oftheinitialladleliningcanberecycled"insitu".Theinstallationcanefficientlybedonebyshotcretingtechnics.Butitrequiresacastablethatresistsslagpenetrationverywell.Castablesbasedonacalciummagnesiumaluminatebondprovidetherequiredpenetrationresistance.Pumpingandshotcretingisverywelladaptedforrepairsofblastfurnaceshafts,torpedocars,hotmetalandsteelladlelinings[1].However,verylittleispublishedabouthowagoodpumpingandshotcretingperformancecanbeachievedwhentheinstallationhastobedoneunderextremeweatherconditions.Athighambienttemperaturethechallengeistoensureagoodpumpingresultwithoutearlycastablestiffening.Blockageofthepumpwouldbetheconsequence.Atlowambienttemperaturethedifficultyistode-activatethehighlyefficientdeflocculantfastenoughwithagellingagentaddedintothewetmixatthenozzletopreventthegunnedmaterialslippingoffthewall.Thispaperstudiesstrategieshowtoachievegoodinstalledpropertiesevenatextremeambienttemperatures.Theinteractionsbetweendeflocculants,retarders,gellingagents,andcalciummagnesiumaluminatebinderasafunctionoftemperaturearestudiedforanalumina-spinelladlecastable.Besideanewgellingagentforthiscastabletypealsoaspecialstabilizertoreducethetemperaturesensitivityhasbeeninvestigated.Itwillbehighlightedhowtheuseofthenewcalciummagnesiumaluminatebinderinlad

简介：ＩＮＳＩＴＵＬＡＢＥＬＩＮＧＡＰＯＰＴＯＳＩＳＩＮＢＲＥＡＳＴＣＡＮＣＥＲＡＳＲＥＬＡＴＥＤＴＯＰＲＯＧＮＯＳＩＳＷｕＪｉｏｎｇ吴炅ＳｈａｏＺｈｉｍｉｎ邵志敏ＪｉａｎｇＭｉｎｇ江明ＨａｎＱｉｘｉａ韩企夏ＺｈａｎｇＴｉｎｇｑｉｕ张廷ＳｈｅｎＺｈｅｎｚ...

简介：Thedynamicandstaticrecrystallizationbehaviorsoftwinrollcastlowcarbonsteelstripwereinvestigatedwithanattempttoprovideguidingdeformationparametersfortheonlinehotrolling.Inordertoinvestigatedynamicrecrystallizationbehavior,ascaststripwasreheatedandsoakedwithaustenitegrainsizesimilartothewidthleveloftheascastcolumnarstructure.Tensiletestwasusedandthedeformationtemperatureisintherangeof900℃to1100℃andstrainratesare0.01s-1,0.1s-1,1s-1.Theactivationenergyandstressexponentweredeterminedas306kJ/moland4.69respectively.Theratioofcriticalstraintothepeakstrainis0.65,andthatofcriticalstresstothepeakstressis0.92.ThedependenceofthepeakstrainontheinitialgrainsizeandZener-HollomonparametersZisεp=9.1×10-4×D00.48Z0.13.Thekineticsofthedynamicrecrystallizationandrecrystallizedgrainsizewaspredictedusingmodelspublished.Theascastcoarseausteniteweredramaticallyrefinedaftercompletedynamicrecrystallization.Forstaticrecrystallization,thetensiletestwascarriedoutonGleeble-3500thermo-mechanicalsimulator.Thedeformationtemperatureisintherangeof800℃to1200℃withstrainrate0.01s-1to1s-1.Theprestrainisfixedat0.04to0.12andtheinter-hitdelaytimevariesfrom1sto3000s.TheactivationenergyandAvramiexponentofstaticrecrystallizationweredeterminedas241kJ/moland0.54respectively.Akineticsmodelwasproposedtodescribethestaticrecrystallizationkinetics.Thepredictedresultswereingoodagreementwiththeexperimentalresults.

简介：ＥｆｅｃｔｏｆＲａｒｅＥａｒｔｈｓａｎｄＮｉｔｒｏｇｅｎｏｎＧｒａｐｈｉｔｅＳｔｒｕｃｔｕｒｅｏｆＧｒａｙＣａｓｔＩｒｏｎＺｈａｉＱｉｊｉｅ（翟启杰），ＺｅｎｇＱｉ（曾奇）（ＦｏｕｎｄｒｙＩｎｓｔｉｔｕｔｅ，ＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉｅｎｃｅａ...

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简介：SrMoO4nanoplatesweresynthesizedbyafacilereversemicroemulsionmethodatroomtemperature.Energyevolutionofthisinsitugrowthprocesswasmonitoredbymeansofamicrocalorimeter.Asharpexothermicpeakfortheinitialreactionandtwodiscontinuousrelativelyweakexothermicpeaksforthesubsequentcrystalgrowthemergedonthemicrocalorimetricheatflowcurve.Basedontheinsituthermokineticdata,therateconstantsofthenucleationprocessandcrystallizationprocessat298.15Kwerecalculatedtobe4.078×10-3and5.033×10-4s-1,respectively.Thegrowthmechanismandenergyevolutionwereinvestigated.

简介：沉积氧需求(草皮)是为水质量分析并且为在河，湖，河口和海湾里当模特儿的水质量的一个关键参数。草皮能在实验室并且在situ被测量。然而，在里面situ技术看起来是为测量草皮，，的更好的途径它可能提供更代表性、精确的结果。以便优化设计在situ草皮测量房间，在圆柱的草皮测量房间的三维的流动地，通常使用为在situ大小，被使用基于RNG的k-数字地模仿了两倍方程骚乱模型。有三种不同流入管子配置的草皮房间被调查。结果证明那房间III在另外的图案上介绍明显的优点为在situ草皮测量，因为好流动混合能被完成，底部沉积暂停能在房间被避免。数字模拟结果被比较验证，存在结果源于实验室实验。设计反映数字模拟的结果的草皮测量房间成功地被测试为在新鲜、盐的水里的situ草皮大小。

简介：ThebasestructureofinsituTiCP/Fecompositesfabricatedunderindustrialconditionwaschangedbydifferentheattreatments.Erosiveweartestswerecarriedoutandtheresultswerecomparedwiththatofwear-resistantwhitecastiron.TheresultssuggestthatthewearresistanceoftheinsituTiCp/Fecompositeishigherthanthatofwear-resistantwhitecastironunderthesanderosivewearcondition.Thewearmechanismofthewear-resistantwhitecastironwasacycleprocessthatbasesurfacewaswornandcarbideswereexposed,thencarbideswasbrokenandwearpitsappeared.WhilethewearmechanismofinsituTiCp/FecompositewasacycleprocessthatbasesurfacewaswornandTiCgrainswereexposedanddropped.ThewearresistanceofinsituTiCp/Fecompositewaslowerthanthatofwear-resistantwhitecastironundertheslurryerosivewearcondition.Undersuchcircumstance,thematerialwasnotonlyundergoneerosivewearbutalsoelectrochemistryerosionduetothecontactwithwaterinthemedium.Thewearbehaviourscanbeacombinationoftwokindsofwearandthesanderosivewearisworsethanslurryerosivewear.