ANSI/IEEE 802.15.1-2002 信息技术.系统间的电信和信息交换.局域和城域网.特殊要求.第15.1部分:无线个人区域网的无线媒体存取控制和物理层规范
时间:2024-05-25 19:56:02 来源: 标准资料网 作者：标准资料网 阅读：9779
【英文标准名称】:InformationTechnology-TelecommunicationsandInformationExchangeBetweenSystems-LocalandMetropolitanAreaNetworks-SpecificRequirements-Part15.1:WirelessMediumAccessControl(MAC)andPhysicalLayer(PHY)SpecificationsforWirelessPers
【原文标准名称】:信息技术.系统间的电信和信息交换.局域和城域网.特殊要求.第15.1部分:无线个人区域网的无线媒体存取控制和物理层规范
【标准号】:ANSI/IEEE802.15.1-2002
【标准状态】:作废
【国别】:美国
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:M11
【国际标准分类号】:35_110
【页数】:
【正文语种】:英语
【英文标准名称】:StandardPracticeforQuantitativeMeasurementandReportingofHypoeutectoidCarbonandLow-AlloySteelPhaseTransformations
【原文标准名称】:亚共析碳钢和低合金钢相位变换的定量测量和报告的标准规程
【标准号】:ASTMA1033-2010
【标准状态】:现行
【国别】:
【发布日期】:2010
【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】:A01.13
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:膨胀计测定法;相位变换;薄板;应变;碳钢;连续涂层变换数据;热膨胀计法;尺寸变化;高速膨胀测定法技术;亚共析钢相位变换;等温条件/测试;低合金钢;微观结构;相(位)分析;定量分析/测量;钢棒
【英文主题词】:dilatometry;phasetransformations;steel;strain;Carbonsteel;Continuouscoatingtransformationdata;Dilatometermethod;Dimensionalchange;Highspeeddilatometrytechniques;Hypoeuctectoidsteelphasetransformations;Isothermalconditions/testi
【摘要】:Thispracticeisusedtoprovidesteelphasetransformationdatarequiredforuseinnumericalmodelsforthepredictionofmicrostructures,properties,anddistortionduringsteelmanufacturing,forging,casting,heattreatment,andwelding.Alternatively,thepracticeprovidesendusersofsteelandfabricatedsteelproductsthephasetransformationdatarequiredforselectingsteelgradesforagivenapplicationbydeterminingthemicrostructureresultingfromaprescribedthermalcycle.Thereareavailableseveralcomputermodelsdesignedtopredictthemicrostructures,mechanicalproperties,anddistortionofsteelsasafunctionofthermalprocessingcycle.Theiruseispredicatedontheavailabilityofaccurateandconsistentthermalandtransformationstraindata.Strain,boththermalandtransformation,developedduringthermalcyclingistheparameterusedinpredictingbothmicrostructureandproperties,andforestimatingdistortion.Itshouldbenotedthatthesemodelsareundergoingcontinueddevelopment.Thisprocessisaimed,amongotherthings,atestablishingadirectlinkbetweendiscretevaluesofstrainandspecificmicrostructureconstituentsinsteels.Thispracticedescribesastandardizedmethodformeasuringstrainduringadefinedthermalcycle.Thispracticeissuitableforprovidingdataforcomputermodelsusedinthecontrolofsteelmanufacturing,forging,casting,heat-treating,andweldingprocesses.Itisalsousefulinprovidingdataforthepredictionofmicrostructuresandpropertiestoassistinsteelalloyselectionforend-useapplications.Thispracticeissuitableforprovidingthedataneededfortheconstructionoftransformationdiagramsthatdepictthemicrostructuresdevelopedduringthethermalprocessingofsteelsasfunctionsoftimeandtemperature.Suchdiagramsprovideaqualitativeassessmentoftheeffectsofchangesinthermalcycleonsteelmicrostructure.AppendixX2describesconstructionofthesediagrams.Itshouldberecognizedthatthermalandtransformationstrains,whichdevelopinsteelsduringthermalcycling,aresensitivetochemicalcomposition.Thus,anisotropyinchemicalcompositioncanresultinvariabilityinstrain,andcanaffecttheresultsofstraindeterminations,especiallydeterminationofvolumetricstrain.Strainsdeterminedduringcoolingaresensitivetothegrainsizeofaustenite,whichisdeterminedbytheheatingcycle.ThemostconsistentresultsareobtainedwhenaustenitegrainsizeismaintainedbetweenASTMgrainsizesof5to8.Finally,theeutectoidcarboncontentisdefinedas0.8%forcarbonsteels.Additionsofalloyingelementscanchangethisvalue,alongwithAc1andAc3temperatures.Heatingcyclesneedtobeemployed,asdescribedbelow,toensurecompleteformationofausteniteprecedingstrainmeasurementsduringcooling.1.1Thispracticecoversthedeterminationofhypoeutectoidsteelphasetransformationbehaviorbyusinghigh-speeddilatometrytechniquesformeasuringlineardimensionalchangeasafunctionoftimeandtemperature,andreportingtheresultsaslinearstrainineitheranumericalorgraphicalformat.1.2Thepracticeisapplicabletohigh-speeddilatometryequipmentcapableofprogrammablethermalprofilesandwithdigitaldatastorageandoutputcapability.1.3Thispracticeisapplicabletothedeterminationofsteelphasetransformationbehaviorunderbothisothermalandcontinuouscoolingconditions.1.4Thispracticeincludesrequirementsforobtainingmetallographicinformationtobeusedasasupplementtothedilatometrymeasurements.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoa......
【中国标准分类号】:H20
【国际标准分类号】:77_040_99
【页数】:14P.;A4
【正文语种】:
【英文标准名称】:Testingofheatingappliances;instructionsfortesting
【原文标准名称】:房间取暖设备的检验.检验规则
【标准号】:DIN4704T.1-1988
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:Q83
【国际标准分类号】:
【页数】:
【正文语种】: