学科分类
/ 25
500 个结果
  • 简介:随着我国市场经济的发展和入世的深入,乡镇企业的生存和发展日益受到威胁。怎样提高乡镇企业在国内和国际市场上的竞争力?笔者认为,最基本、最重要的对策就是建立现代企业制度。本文分析了乡镇企业建立现代企业制度的客观必然性,提出了乡镇企业现代企业制度构建的思路。

  • 标签: 乡镇企业 现代企业制度 构建
  • 简介:Acomparativestudyofnewmagnesiumalloysdevelopedforelevatedtemperatureapplicationsinautomotiveindustry,Adevelopmentofvirtualprototypingmanufacturingsystemforhighpressurediecastingprocesses,Afinishmachiningstrategyforrapidmanufacturedpartsandtools,Anewmanufacturingtechnologyforinductionmachinecopperrotors,AStudyonPerformanceEvaluationandImprovementofSteeringWheelwithMgDieCastingCore,AstudyonprocessesandmechanicalpropertiesofdiecastA.380V6engineblocks.

  • 标签: 压力铸造 加工工艺 镁合金 自动监测
  • 简介:FabricationandMechanicalPropertiesofCu-basedBulkAmorphousAlloys,InvestigationofAl-Sicompositionsforthinfilmapplications,Resinstobecheerful,Vacuumcastingwithroomtemperaturevulcanizingrubberandaluminiummouldsforrapidmanufacturingofqualityparts:acomparativestudy.

  • 标签: 真空铸造 铜合金 力学性质 铝硅复合材料 室温条件
  • 简介:HardnessandyieldstrengthincastMg-Alalloys;HEALTHANDSAFETYASPECTSOFINVESTMENTCASTINGWAXES;Highaluminacementsasbindersforinvestmentcastingshells;IIncreaseinCalculationSpeedofRadiativeHeatTransferinPrecisionCastingFurnacesofGas-TurbineBlades;ImprovedCastingProcessforLargeSingleCrystalGasTurbineComponents;IncreasetnCalculationSpeedofRadiativeHeatTransferinPrecisionCastingFurnacesofGasTurbineBlade

  • 标签: 精密铸造 镁铝合金 热转换 机械性质
  • 简介:Diespray,diecostanddielife;DIE-CASTCOPPERROTORSFORIMPROVEDMOTORPERFORMANCE;DiecastabilityofMg-AI-SrHighTemperatureCreepResistanceAlloysBasedonLaboratoryEvaluations&ComponentDieCastingTrials;Diesandtoolsforhighperformanceapplications;EarlyResidualStressDevelopmentInAluminumDieCastingDies

  • 标签: 压力铸造 机械性质 铝合金 循环工艺
  • 简介:3DTHERMOMECHANICALSIMULATIONOFTHESECONDARYCOOLINGZONEOFSTEELCONTINUOUSCASTING,4thEuropeanconferenceoncontinuouscasting,Anewprocessofdirectenamelingonvarioussteelgradescoatedwithspecialelectro-depositednickel,Anapproximationmodelofcontactstatebetweenrollandstrand-computationofthree-dimensionaldeformationbehaviorofcontinuouslycaststeelstrandinmultirollspansI,Anelectricdriveforthewithdrawalrollersofacontinuous-castingmachine,Aninvestigationofslagfloatationandentrapmentinacontinuous-castingtundishusingfluid-flowsimulations,samplingandphysicalmetallurgy.

  • 标签: 连续铸造 处理工艺 钢材 近似模型
  • 简介:DentalcastingpropertiesofTi-15Zr-4Nb-4Taalloy;DETERMINATIONOFINTERFACIALHEATTRANSFERCOEFFICIENTSININVESTMENTCASTING;DETERMININGWAXPATFERNDIMENSIONSININVESTMENTCASTINGUSINGVISCOELASTICMODELS;DevelopmentofacheepcreepresistantMg-Al-Zn-Si-basealloy;Dynamicprocessesduringpouringofshellmoldsininvestmentcasting。

  • 标签: 精密铸造 蠕变阻抗 力学处理 外壳空模 锌-硅基合金
  • 简介:Preparationofthehoneycombpatternedporousfilmofbiodegradablepolymerfortissueengineeringscaffolds;Productionofoutlooksforprecisioncostingdevelopment;ProductionofTantalumPowderbyMagnesiothermicReductionofFeedPreform;REACTIONSYNFIIESISOFREFRACTORYMETAL-CERAMICCOMPOSITES;Researchonthehighperformancesiliconcarbideceramicsandsiliconcarbidebasedcomposites。

  • 标签: 蜂窝模式 铸造工艺 多孔渗水薄膜 生物降解聚合物