简介：ＤｅｖｅｌｏｐｍｅｎｔｏｎｍａｎｕｆａｃｔｕｒｉｎｇｔｅｃｈｎｏｌｏｇｙｏｆｒａｉｌｗａｙｌｏｃｏｍｏｔｉｖｅａｎｄｒｏｌｌｉｎｇｓｔｏｃｋｉｎｄｕｓｔｒｙｉｎＣｈｉｎａ￥ＷＡＮＧＫｅｊｉａ（ＣｈｉｎａＮａｔｉｏｎａｌＲａｉｌｗａｙＬｏｃｏｍｏｔｉｖ...

简介：Sm_(0.9)Pr_(0.1)Fe_xandSm_(1-x)Nd_xFe_(1.9)的结构，磁化，和磁伸缩变瘦电影用X光检查衍射，颤动的样品磁强计，和光伸臂方法被调查了。Sm_(0.9)Pr_(0.1)Fe_xthin电影的结构由一张Sm-Pr-Fe无定形相组成，这被发现什么时候x≤2.69并且Sm_(1-x)Nd_xFe_(1.9)的薄电影由一张Sm-Nd-Fe无定形相组成。有Fe内容的增加的在里面飞机磁化ofSm_(0.9)Pr_(0.1)Fe_x薄电影增加，和茶碱飞机coercivity的低价值发生在1.62≤x≤的范围2.28。当时，有增加Fe的磁伸缩价值ofSm_(0.9)Pr_(0.1)Fe_x薄电影增加满足x≤1.94并且减少什么时候x>1.94。Sm_(1-x)Nd_xFe_(1.9)的在里面飞机磁伸缩在低磁场下面的薄电影被Nd的替换为Sm改进了什么时候x=0.2。

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简介：Adistributedcontrolsystemisdesignedforplasmasprayingequipmentandtheconfigurationsofsystemsoftwareandhardwareisdiscussed.Throughfoundinganexpertdatabase,thesprayingprocessparametersareworkedoutandtheinitializationandcontrolofsprayingprocessarerealized.Theplasmasprayingsystemwiththiscontrolconfigurationcansimplifythesprayingoperation,improveautomationlevelofsprayprocess,andapproachtheexperiencecriterionassoonaspossible.

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简介：Thechemicalandelectrochemicalequilibriainthepresenceofgaseousphasewereinvestigated.Manysubstances,whichconsistedofsulphurandchromium,wereconsidered.Variousthermodynamicequilibriawerecalculatedindifferentpressures.Calculationresultswereshownaslogp―1/TandE―Tdiagrams.Thesediagramsmaybeusedtostudythecorrosionofchromiuminsulphur-containingcircumstances.Thediagramsarealsousedtothermodynami-callydeterminetheexistenceareaofvarioussubstancesandsoon.

简介：１ＱｕａｓｉｐａｒａｂｏｌｏｉｄＲｕｌｅＢａｓｅｄｏｎｔｈｅｐｒｉｎｃｉｐｌｅｔｈａｔｔｈｅｍｏｌａｒＧｉｂｂｓｆｒｅｅｅｎｅｒｇｙｆｕｎｃｔｉｏｎｉｓｔｏｗａｒｄｓａｍｉｎｉｍｕｍｗｈｅｎａｐｈａｓｅｉｓｓｔａｂｌｅ，ａｇｅｎｅｒａｌｒｅｌａ...

简介：Byuseofmicro-DTAtechniqueaswellasambientandhightemperatureX-rayanalysisthephasediagramofNaCl-CaCl2hasbeenchecked.Itis.asimpleeutecticsystemwithasolidsolubilityinthesodiumchlorideside.Theeutecticpointisat773K,49mol%NaCl.Theexperimentalresults,especiallythoseoftheX-raydiffractionstudieshaveshowedthattheincongruentcompound4NaCl-CaCl2doesnotexistintheNaCl-CaCl2system.

简介：以便获得对Mg-Ga二进制系统的热力学的描述，对系统的热力学的评价通过Thermo计算用CALPHAD方法被执行？软件包裹基于从出版文学的所有可得到的试验性的数据的评估。答案阶段包括液体，hcp(Mg)并且斜方晶(Ga)，被代理答案模型，过量吉布斯精力与Redlich-Kister多项式被表示描述。同时，所有金属间化合的混合物，Mg5Ga2，Mg2Ga，MgGa，MgGa2和Mg2Ga5，作为stoichiometric混合物被建模。在Mg-Ga二进制系统提出各种各样的阶段的吉布斯精力的一套前後一致的热力学的参数最后被获得。好一些的协议在计算结果和报导试验性的数据之间被完成。

简介：ＥｎｔｈａｌｐｙｏｆＲｅａｃｔｉｏｎｓｉｎＹ－Ｂａ－Ｃｕ－ＯＳｙｓｔｅｍＳｈａＷｅｉ沙维（Ｄｅｐａｒｔｍｅｎｔｏｆ．ＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＭｅｔａｌｌｕｒｇｙ，ＵｎｉｖｅｒｓｉｔｙｏｆＣａｍｂｒｉｄｇｅ．Ｕ．Ｋ．）Ｒｅｃｅｉｖｅｄ１７...

简介：ＰｈａｓｅＥｑｕｉｌｉｂｒｉａＣａｌｃｕｌａｔｉｏｎｏｆｔｈｅＧａＩｎＳｂＴｅｒｎａｒｙＳｙｓｔｅｍＸｉｅＹｕｎ′ａｎ，ＱｉａｏＺｈｉｙｕ，ＸｉｎｇＸｉａｎｒａｎａｎｄＷａｎｇＣｏｎｇ（谢允安）（乔芝郁）（邢献然）（王聪）Ｄｅｐｔ．ｏｆＰｈｙｓ...

简介：Consideringthelimitationofcomputationalcapacity,anewfiniteelementsolutionisusedtosimulatetheweldingdeformationofthesidesillofrailroadcar'sbogieframebasedonthelocal-globalmethod.Firstly,avolumetricheatsourcedefinedbyadoubleellipsoidisadoptedtosimulatethethermaldistributionsofthearcweldingprocess.Andthen,thelocalmodelsextractedfromtheglobalmodelarecomputedwithrefinedmeshes.Onthesebases,theglobaldistortionsofthesubjectstudiedareascertainedbytransferringtheinnerforcesofcomputedlocalmodelstotheglobalmodel.Itindicatesthatthelocal-globalmethodisfeasibleforsimulatingthelargeweldedstructuresbycomparingthecomputedresultswiththecorrespondingactualmeasuredvalues.Theworkprovidesbasisforoptimizingtheweldingsequenceandclampingconditions,andhastheoreticalvaluesandengineeringsignificanceintheintegraldesign,manufacturingtechniqueselectionofthebogieframe,aswellasotherkindsoflargeweldedstructures.

简介：车用R14铝合金拔叉铸件在使用过程中发生断裂。利用光电直读光谱仪、金相显微镜、扫描电子显微镜对发生断裂的压铸件的化学成分、组织、断口形貌和微区成分进行分析。结果表明：倒档拔叉R14铝合金材料化学成分、力学性能和表面硬度均合格,但其近表层的针孔度及截面突变处的R角均不符合设计要求;截面突变处存在的疏松缺陷及较大的应力集中使失效件承受拉应力时裂纹在疏松处萌生,在往复的拉压应力下裂纹快速扩展并最终导致断裂的发生;建议在拔叉铸件压铸成型后增加针孔度检查及增加截面突变处R值。

简介：ＳｔｕｄｙｏｎＧｄＡｌＤｙＳｙｓｔｅｍＭａｇｎｅｔｉｃＲｅｆｒｉｇｅｒａｔｉｏｎＭａｔｅｒｉａｌｓＣｈａｎｇＸｉｕｍｉｎ，ＹａｎＪｕｎｌｉａｎ（常秀敏）（闫俊联）ＢｅｉｊｉｎｇＧｅｎｅｒａｌＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｆｏｒＮｏｎｆｅｒｒ...

简介：Anewkindofcontrolsystemforkeyholeplasmaarcwelding(K-PAW)wasdevelopedbasedonthecomputerandtheGraphicsLanguage-LabVIEW.Itcansetandoutputtherequiredcurrentwaveformswithdesireddecreasingslopessothatthecorresponding'openingandclosing'ofkeyholecanoccurperiodically.Withthiscontrolstrategyofweldingcurrentwaveforms,theworkpieceisfullypenetratedwhilenoburn-throughoccurs.Keyholeplasmaarcweldingexperimentswereconductedtoverifythestabilityandreliabilityofthedevelopedsystem.

简介：Robot-basedremanufacturingsystemcanscanthewornpartsanddevelopthecorrespondingmodels,comparethemwiththestandardmodel,calculatethewelddeposit,implementweldingpathplanning,andrepairthewornpartswithMIGsurfacingautomatically.Thispaperinvestigatestheweldingpathplanningaftercalibrating,scanningandmodelrebuilding.Thefollowingaspectsarecontained:introducingtheplanningprinciple,selectingthesuitableweldingprocessbasedonweldingparameters(currentandspeed),calculatingweldingoverlapquantitybythesuperpositionmethod.Also,ithasbeenverifiedthatgoodweldprofilecanbeobtainedwiththeoptimizedparameters.

简介：AfteranalyzingtheweldingprocedureknowledgeinChinesenationalstandardsforweldingprocedurequalificationofsteelpressurevesselfromthepointofestablishingexpertsystem,itcanbedividedintofivetypesofknowledge,i.e.practice,definition,regularity,processanddescriptionknowledge.Theknowledgeexpressionmethodsareestablishedaccordingtothedifferenttypeofweldingprocedureknowledge.Thereasoningprocessbasedonruleisadopted.Andthereasoningengineisembeddedamongobjectsintegratedwiththeknowledgebase.

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简介：AnewtypeofDZ9000EOxygenGaseousHVOFsystem(GHVOF)isdevelopedwhichcanreducethecostofcoatingsandincreasethein-situremovabilitytoadaptvariousworkingconditions.Thewholesystemiseconomical,whichenablesthesystemtomeettherequirementofsprayingmediumorlowcostHighVelocityOxy-Fuel(HVOF)coatingsformediumandsmalljobshops.ThedepositedcermetscoatingsbytheDZ9000EsystemhavegoodperformancewithaveragemicrohardnessHV0.2ofmorethan1000andthebondstrengthbetweencoatingandsubstrateofgreaterthan50MPa.