【英文标准名称】:StandardTestMethodforIsothermalCorrosionResistanceofRefractoriestoMoltenGlass
【原文标准名称】:熔融玻璃耐火材料耐等温腐蚀的标准试验方法
【标准号】:ASTMC621-1984(2001)
【标准状态】:现行
【国别】:
【发布日期】:1984
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:C08.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:耐火材料;玻璃;耐腐蚀性
【英文主题词】:corrosion;crucible;finger;glass;glass-line;cut;iso-thermal;metal-linecut;refractory;static
【摘要】:Thistestmethodprovidesarapid,inexpensivemethodforcomparingthecorrosionresistanceofrefractories.Theisothermalconditionsofthistestmethodrepresentthemostseverestaticcorrosionenvironmentpossibleatthespecifiedtesttemperature.Thistestmethodissuitableforqualitycontrol,researchanddevelopmentapplications,andforproductvaluestudiesonsimilarmaterials.Testsrunataseriesoftemperaturesareoftenhelpfulindeterminingtheusetemperaturelimitationsofaparticularmaterial.Melt-linecorrosionresultsarealsoausefulindicationofrelativeresistancetobothupwardanddownwarddrillingcorrosionmechanisms.Examinationoftestspecimensalsoprovidesinformationaboutthetendencyforaparticularrefractorytoformstonesorotherglassdefects.Becausethistestmethodisbothisothermalandstaticandsincemostglass-contactrefractoriesoperateinadynamicsystemwithathermalgradient,testresultsdonotdirectlypredictserviceinafurnace.Theeffectsofdifferingthermalconductivities,refractorythickness,artificialcoolingorinsulationupontherefractorythermalgradient,andtheerosiveactionofmovingmoltenglasscurrentsarenotevaluatedwiththistest.1.1Thistestmethodcoversthedeterminationofthecorrosionresistanceofrefractoriesincontactwithmoltenglassunderstatic,isothermalconditions.1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesinparenthesesareprovidedforinformationonly.1.3Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q40
【国际标准分类号】:81_080
【页数】:6P.;A4
【正文语种】:


【英文标准名称】:Welding.Acceptanceinspectionofelectronbeamweldingmachines.Measurementofrun-outaccuracy
【原文标准名称】:焊接.电子束焊接机的验收检验.偏转精度的测量
【标准号】:BSENISO14744-5-2001
【标准状态】:现行
【国别】:英国
【发布日期】:2001-04-15
【实施或试行日期】:2001-04-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:验收(鉴定);验收检验;验收规范;准确度;定义(术语);电焊;电子束;电子束焊;误差;熔焊;检验;连接工艺;测量;测量特征;测量组织;测定;测量仪器;测量技术;位移精确度;性能;精密度;试验设备;测试;公差(测量);焊接;焊接工程;焊接设备;焊机;焊接参数
【英文主题词】:Acceptance(approval);Acceptanceinspection;Acceptancespecification;Accuracy;Definitions;Electricwelding;Electronbeams;Electron-beamwelding;Errors;Fusionwelding;Inspection;Joiningprocesses;Measurement;Measurementcharacteristics;Measurementset-up;Measuring;Measuringinstruments;Measuringtechniques;Movementaccuracy;Performance;Precision;Testequipment;Testing;Tolerances(measurement);Welding;Weldingengineering;Weldingequipment;Weldingmachines;Weldingparameters
【摘要】:Thisstandardisintendedforusewhentherun-outaccuracyofthemovingpartsofelectronbeamweldingmachinescomplyingwithENISO14744-1istobemeasuredinconnectionwithanacceptanceinspection.Itprovidesinformationontheprocedureandapparatustobeusedformakingthemeasurements.Giventhegreatvarietyofelectronbeamweldingmachines,thescopeofmeasurementsrequiredforacceptanceinspectionpurposesshouldbespecifiedseparatelyforthemachineconcerned.Run-outaccuracyasdefinedhereisasystematicerrorandthuscountsasoneoftheparametersbywhichtheperformanceofamachinetoolcanbecharacterized.Otherfactorsinfluencingperformance(e.g.dynamicforces,vacuumlevel,positioningaccuracyofCNCmachines)andmethodsofstatisticalevaluationarenotcoveredinthisstandard.Electronbeamweldinginvolvesmovementoftheworkpieceand/oroftheelectrongun.Successfulweldingpresupposesthatthismovementiseffectedbythedevicesconcerned(e.g.worktableandrotatingfixture)withagivendegreeofaccuracy.Thepurposeofthemeasurementisthustocheckwhetherandtowhatextenttherequiredrun-outaccuracyismaintained.
【中国标准分类号】:J64
【国际标准分类号】:25_160_30
【页数】:14P;A4
【正文语种】:英语