【英文标准名称】:StandardPracticeforGuarded-Hot-PlateDesignUsingCircularLine-HeatSources
【原文标准名称】:使用圆形线性加热源的护热板设计的标准实施规程
【标准号】:ASTMC1043-2006(2010)
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:C16.30
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:防护热板装置;热流;线光源加热器;恒定态;导热性;隔热;热变电阻
【英文主题词】:guardedhotplateapparatus;heatflow;linesourceheater;steadystate;thermalconductivity;thermalinsulation;thermalresistance
【摘要】:Thispracticedescribesthedesignofaguardedhotplatewithcircularline-heatsourcesandprovidesguidanceindeterminingthemeantemperatureofthemeterplate.Itprovidesinformationandcalculationproceduresfor:(1)controlofedgeheatlossorgain(AnnexA1);(2)locationandinstallationofline-heatsources(AnnexA2);(3)designofthegapbetweenthemeterandguardplates(AppendixX1);and(4)locationofheaterleadsforthemeterplate(AppendixX2).Acircularguardedhotplatewithoneormoreline-heatsourcesisamenabletomathematicalanalysissothatthemeansurfacetemperaturecanbecalculatedfromthemeasuredpowerinputandthemeasuredtemperature(s)atoneormoreknownlocations.Further,acircularplategeometrysimplifiesthemathematicalanalysisoferrorsresultingfromheatgainsorlossesattheedgesofthespecimens(seeRefs(10,11)).Inpractice,itiscustomarytoplacetheline-heatsource(s)inthemeterplateataprescribedradiussuchthatthetemperatureattheouteredgeofthemeterplateisequaltothemeansurfacetemperatureoverthemeterarea.Thus,thedeterminationofthemeantemperatureofthemeterplatecanbeaccomplishedwithasmallnumberoftemperaturesensorsplacednearthegap.Aguardedhotplatewithoneormoreline-heatsourceswillhavearadialtemperaturevariation,withthemaximumtemperaturedifferencesbeingquitesmallcomparedtotheaveragetemperaturedropacrossthespecimens.Providedguardingisadequate,onlythemeansurfacetemperatureofthemeterplateentersintocalculationsofthermaltransmissionproperties.Caremustbetakentodesignacircularline-heat-sourceguardedhotplatesothattheelectric-currentleadstoeachheatereitherdonotsignificantlyalterthetemperaturedistributionsinthemeterandguardplatesorelseaffectthesetemperaturedistributionsinaknownwaysothatappropriatecorrectionscanbemade.Theuseofoneorafewcircularline-heatsourcesinaguardedhotplatesimplifiesconstructionandrepair.Forroom-temperatureoperation,theplatesaretypicallyofone-piecemetalconstructionandthusareeasilyfabricatedtotherequiredthicknessandflatness.Thedesignofthegapisalsosimplified,relativetogapdesignsfordistributed-heat-sourcehotplates.Inthesingle-sidedmodeofoperation(seePracticeC1044),thesymmetryoftheline-heat-sourcedesignintheaxialdirectionminimizeserrorsduetoundesiredheatflowacrossthegap.1.1Thispracticecoversthedesignofacircularline-heat-sourceguardedhotplateforuseinaccordancewithTestMethodC177.Note18212;TestMethodC177describestheguarded-hot-plateapparatusandtheapplicationofsuchequipmentfordeterminingthermaltransmissionpropertiesofflat-slabspecimens.Inprinciple,thetestmethodincludesapparatusdesignedwithguardedhotplateshavingeitherdistributed-orline-heatsources.1.2Theguardedhotplatewithcircularline-heatsourcesisadesigninwhichthemeterandguardplatesarecircularplateshavingarelativelysmallnumberofheaters,eachembeddedalongacircularpathatafixedradius.Inoperation,theheatfromeachline-heatsourceflowsradiallyintotheplateandistransmittedaxiallythroughthetestspecimens.1.3Themeterandguardplatesarefabricatedfromacontinuouspieceofthermallyconduc......
【中国标准分类号】:
【国际标准分类号】:17_200_10
【页数】:16P.;A4
【正文语种】:


【英文标准名称】:Metallicpowders-Determinationofoxygencontentbyreductionmethods-Hydrogen-reducibleoxygen
【原文标准名称】:金属粉末.用还原法测定氧含量.可被氢还原的氧量
【标准号】:BSENISO4491-3-2006
【标准状态】:现行
【国别】:英国
【发布日期】:2006-04-28
【实施或试行日期】:2006-04-28
【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】:分析;碳;化学分析和试验;含量测定;氢;氢还原;材料;材料技术;金属粉末;金属;氧;含氧量;粒状材料;粉末冶金;试剂;还原;还原法;抽样方法;试验报告;试验结果;试验
【英文主题词】:Analysis;Carbon;Chemicalanalysisandtesting;Determinationofcontent;Hydrogen;Hydrogenreduction;Materials;Materialstechnology;Metallicpowders;Metals;Oxygen;Oxygencontent;Particulatematerials;Powdermetallurgy;Reagents;Reduction;Reductionmethods;Samplingmethods;Testreports;Testresults;Testing
【摘要】:ThispartofISO4491specifiesamethodforthedeterminationofthehydrogen-reducibleoxygencontentofmetallicpowderscontaining0,05%(m/m)to3%(m/m)oxygen.Themethodisapplicabletounalloyed,partiallyalloyedorcompletelyalloyedmetalpowdersandalsotomixturesofcarbidesandbindermetal.Itisnotapplicabletopowderscontaininglubricantsororganicbinders.Themethodmaybeextendedtopowderscontainingcarbonbytheuseofaspecialcatalyticdevice.ThispartofISO4491shallbereadinconjunctionwithISO760andISO4491-1.
【中国标准分类号】:H70
【国际标准分类号】:77_160
【页数】:18P.;A4
【正文语种】:英语