简介：Thedeformationmechanismsandprocessingmapsoftheas-castAl-Zn-Mg-Cu(7075)aluminum(Al)alloywerestudiedandcomparedwiththoseofthehomogenized7075Alalloyinthetemperaturerangeof573–723Kandinthestrainraterangeof10~(-3)–10s~(-1)toexploreapossibilityfordirectlyusingtheascast7075Alalloyasabilletforhotworking.Theas-castandhomogenized7075Alalloyshadsimilargrainsizesandshowedsimilarhigh-temperaturedeformationbehaviors.Theas-cast7075Alalloy,however,exhibitedhigherpowerefficienciesandsmallerunstable?owregionscomparedtothehomogenized7075Alalloybecauseofthepresenceofsecondaryphases(MgZn_2)segregatedatthedendriticinterfacesintheas-castmicrostructure,whichwereformedduringnon-equilibriumsolidi?cation.Thesesegregatedphasesprovidednucleationsitesfordynamicrecoveryorcontinuousdynamicrecrystallization,andasaresulta?neandmorehomogeneous(sub)grainstructurecouldbeobtainedfromtheas-castmicrostructurecomparedtothehomogenizedmicrostructure.Thecurrentworksuggestedthepossibilityandadvantageofusingas-castmicrostructuresforhotworkingofaluminumalloyswithhighcontentofsolutes.

简介：摘要：本次研究以桂林市排水工程管理处临桂西城污水处理厂为背景，主要对CAST污水处理工艺相关情况刍议，重点分析了该项工艺和临桂西城污水处理厂其特点、进水及出水的水质。然后对计算机控制技术应用于CAST污水处理工艺对策进行探讨，可合理应用计算机控制技术于CAST污水处理工艺中，以分级方式处理污水主要为一级处理、二级处理、三级处理，在发挥出计算机控制技术最大作用的同时，还可以确保污水处理的整体效果，满足《城镇污水处理厂污染物排放标准》（GB18918—2002）一级A类排放标准。

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简介：包含长带扔的一条新奇处理线路，预先退火的处理，冷滚动和退火的再结晶被用于Fe-2.6%Si钢改进磁性。当演员组长带的影响在微观结构，质地，降水和磁性上预先退火被电子探查微量分析，传播电子显微镜学，和X光检查衍射分析调查，等等。秒阶段粒子的降水被快速的团结在长带扔期间制止，这被发现。预先退火的缺席导致了大量20-50的出现?nmMnS在最后的退火的表猛抛，它为好谷物和高核心损失负责(4.01?W/kg)由于谷物边界卡住效果。尽管900-1000的微观结构和质地?桴牥椠?潴愠档敩敶甠瑬慲楨桧甠瑬浩瑡?整獮汩?瑳敲杮桴????慐?楷桴畯?慳牣晩捩湩?潦浲'L汩瑩y

简介：TheNd60Fe20Al8Co10B2alloywaspreparedbysuctioncastingofthemoltenalloyintoacoppermoldunderargonatmosphere.Themicro-structuralandmagneticpropertychangesintheNd60Fe20Al8Co10B2alloyduringcrystallizationwereinvestigatedbyX-raydiffraction(XRD),differentialscanningcalorimetry(DSC),scanningelectronmicroscope(SEM)andthevibratingsamplemagnetometer(VSM).TheprecipitationandNd-richandFe-richphaseshavenosignificanteffectontheintrinsiccoercitityforNd60Fe20Al8Co10B2alloyannealedbelow723K.However,thegrowthofFe-richphasedecreasesthesaturatemagnetizationandremanenceofthealloy.Thehardmagneticbehaviorisdisappearedwhenthealloyisfullycrystallized.

简介：Low-CoLa1.8Ti0.2MgNi8.9Co0.1alloyswerepreparedbymagneticlevitationmeltingfollowedbyannealingtreatment.TheeffectofannealingonthehydrogenstoragepropertiesofthealloyswasinvestigatedsystematicallybyX-raydiffraction（XRD）,pressure-compositionisotherm（PCI）,andelectrochemicalmeasurements.TheresultsshowthatallsamplescontainLaNi5andLaMg2Ni9phases.LaCo5phaseappearsat1,000℃.Theenthalpychangeofallhydridesiscloseto-30.6kJ·mol-1H2ofLaNi5compound.Annealingnotonlyincreaseshydrogencapacityandimprovescyclingstabilitybutalsodecreasesplateaupressureat800and900℃.Afterannealing,thecontractionofcellvolumeandtheincreaseofhydridestabilitycausethehighratedischargeabilitytoreduceslightly.Theoptimumalloyisfoundtobeoneannealedat900℃,withitshydrogencapacityreachingupto1.53wt%,anddischargecapacityremaining225.1mAh·g-1after140charge–dischargecycles.

简介：摘要泉州市城东污水厂采用CAST工艺，在运行过程中低碳源的问题尤为突出，影响到污水厂的脱氮除磷效果。笔者对低碳源污水的脱氮进行研究，采取一系列措施从而既能保证出水达标，又能降低碳源投加量，降低处理成本。

简介：AnumberofdrybridgeshavebeenbuilttosubstitutefortheroadbedontheQinghai-TibetRailway,China.Theaimofthisstudywastoinvestigatetheexothermicprocessofcast-in-place(CIP)pilefoundationofadrybridgeanditsharmtothestabilityofnearbyfrozenground.Wepresent3Dheatconductionfunctionsofaconcretepileandoffrozengroundwithrelatedboundaries.Ouranalysisisbasedonthetheoryofheatconductionandtheexponentlawdescribingtheadiabatictemperaturerisecausedbyhydrationheat.ResultsundercontinuousandinitialconditionswerecombinedtoestablishafiniteelementmodelofaCIPpile-frozengroundsystemforadrybridgeunderactualfieldconditionsincoldregions.NumericalresultsindicatedthattheprocesscouldeffectivelysimulatetheexothermicprocessofCIPpilefoundation.ThermaldisturbancetofrozengroundunderalongdrybridgecausedbythecastingtemperatureandhydrationheatofCIPpileswassubstantialandlong-lasting.Thesimulatedthermalanalysisresultsagreedwithfieldmeasurementsandsomesignificantrulesrelatingtotheproblemwerededucedandconclusionsreached.

简介：铁(Fe)在铝(艾尔)有低稳固的溶解度，并且它通常形成Fe富有的金属间化合的混合物。钪(Sc)是能充当谷物的一个元素更精制，修改最容易溶解的硅并且同时改变Fe富有的金属间化合的混合物的形态学。现在的工作被进行在Al-7Si-0.3Mg的机械性质上学习Sc的效果。合金被准备由压榨在Fe的二个层次扔(0.2和0.4?wt%)并且Sc的三个层次(0wt%，0.2wt%并且0.4?wt%)。Sc被发现增加合金的机械性质，包括它的坚硬，收益力量和最终的张力的力量。在0.2点?wt%Fe，当维持好延伸时，增加的Sc增加力量。在0.4点?wt%Fe，增加的Sc增加力量，但是减少延伸稍微。金属间化合的混合物和最容易溶解的硅的分布和形态学影响延伸。Fe富有的金属间化合的混合物和Sc富有的金属间化合的混合物充当裂缝开始地点。0.2?wt%Fe?+?0.2?wt%Sc合金有这些金属间化合的混合物的最低数量，并且最容易溶解的硅小、含纤维。那么，它有最高的延伸。