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【英文标准名称】:StandardTestMethodforAnnealingPointandStrainPointofGlassbyBeamBending
【原文标准名称】:用梁弯曲法测定玻璃的软化点和应变点的标准试验方法
【标准号】:ASTMC598-1993(2003)
【标准状态】:现行
【国别】:
【发布日期】:1993
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:C14.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:软化点;玻璃;试验
【英文主题词】:calibration;certified;annealing;point;extensometer
【摘要】:ThistestmethodoffersanalternateproceduretoTestMethodC336fordeterminingtheannealingandstrainpointsofglass.Itisparticularlyrecommendedforglassesnotadaptabletoflameworking.Alsofewercorrectionsarenecessaryindatareduction.1.1Thistestmethodcoversthedeterminationoftheannealingpointandthestrainpointofaglassbymeasuringtherateofmidpointviscousbendingofasimplyloadedglassbeam.However,attemperaturescorrespondingtotheannealingandstrainpoints,theviscosityofglassishighlytime-dependent.Hence,anyviscositiesthatmightbederivedorinferredfrommeasurementsbythisprocedurecannotbeassumedtorepresentequilibriumstructuralconditions.1.2TheannealingandstrainpointsshallbeobtainedfollowingaspecifiedprocedureafterdirectcalibrationoftheapparatususingbeamsofstandardglasseshavingknownannealingandstrainpointssuchasthosesuppliedandcertifiedbytheNationalInstituteofStandardsandTechnology.1.3Thistestmethod,asanalternativetoTestMethodC336isparticularlywellsuitedforglassesthatforonereasonoranotherarenotadaptableforflameworking.Italsohastheadvantagesthatthermalexpansionandeffectivelengthcorrections,commontothefiberelongationmethod,areeliminated.1.4Thevaluesstatedinmetricunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q30
【国际标准分类号】:81_040_10
【页数】:5P.;A4
【正文语种】: