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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：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：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...

简介：　　引子　　上古时,这个世界上是有神居住的.各个地区信仰的神,是实实在在地存在于人们身边的.然而在公元前五世纪左右的历史轴心期,世界各地的人们的自我意识增强,人类精神开始觉醒,人的理性逐渐取代了对神的崇拜.……

简介：Toenhancetheservicelifeofmagnesiabasedslagdam,compositeslagdamwasdesignedtobecastwithaluminamagnesiacastablesinslaglineandmagnesiacastablesinmoltensteelzone.Workabilityofthemagnesiacastablesfortheslagdamwasimprovedandasuitablevibrationshapingmethodwasadoptedtocombineitwithaluminamagnesiacastables.Theresultshows:(1)workabilityandsettingperformanceofmagnesiacastablescanbeimprovedtomatchwithaluminamagnesiacastablesbyadjustingsettingretarderandwaterreducingagent,andaddingpropersilicafume;(2)compositeslagdamcanbepreparedwithaluminamagnesiacastablesandtheimprovedmagnesiacastables,whetherbyup-downcompositemethodorright-leftcompositemethod;inordertogetfullvibrationandmakeinterfacefluctuationhaveproperamplitude,thevibrationtimeofthetwomethodsaftertwodifferentcastablescontactwitheachotheris3and2.5minutes,respectively;(3)theresultoftheon-sitetestprovesthatthedesignaimsforreducingpollutiontohotmetalandimprovingcorrosionresistancehavebeenachieved.

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简介：广东省湛江市某污水处理厂目前已完成第三期的建设运营，其中三期设计规模为5万吨/日，采用CAST工艺+砼结构加盖（顶部绿化）+生物除臭进行污水处理，本文主要探讨如何强化CAST工艺的除磷脱氮作用，提高除磷脱氮效果。

简介：AttheinitialoperationstageofthecontinuousbloomcasteratBaosteel,alotofcentralporosityandcracksoccurredinblooms,especiallyinthebloomsofhigh-pressureboilersteel.Inthisstudy,amodelofheattransferandsolidificationwassetuptoanalyzetheprocessofcontinuousbloomcasting.Basedonthemodel,thedistributionsoftemperaturefieldandshellthicknesswereobtained,themushyzonewasdefined,andtherebythetechnologyofsoftreductionforbloomswasdeveloped.Afterseveraltestswereconducted,areasonabletestplanwasdeveloped,whichledtothedeterminationoftheoptimalreductionzoneandgaugereduction.Now,centralporosityandcracksinbloomsarealmostavoidedandtheinnerqualityhasbeenobviouslyimproved.

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简介：Toquicklyobtainaccurate3Ddataofdentalcastmodel,thispaperproposesa3Dreconstructionmethodfordentalcastmodelbasedonstructuredlight.Thismethodcombinesthestructuredlightwiththemotorturntabletoobtainagroupof3Ddataforthedentalcastmodelfrommultipleangles,andautomaticallyregistersthedental3Ddatafrommultipleanglesthroughtheballcalibrationofturntable.Comparedwiththerealdataofthedentalcastmodel,themaximumerrorofthe3Dreconstructionresultsinthispaperis0.115mm.Thereconstructiontimeofthisprocessisabout130s.Theexperimentalresultsshowthatthemethodhashighprecisionandhighscanningspeedforthe3Dreconstructionofthedentalcastmodel.

简介：Thedevelopmentofthermalanalysistechniquesforevaluationofcastalloymeltqualityanditscurrentapplicationsinthefoundrywerereviewed.Thecharacteristicsofthecurrentthermalanalysistechniqueswereanalyzed.Anewcomprehensivemethodforcoolingcurverecognitionhasbeenproposed.Theevaluationofcastalloymeltqualitywasrealized.