EJ/T 751-1993 放射性矿产地质分析测试实验室质量保证规范
作者:标准资料网 时间:2024-05-19 11:46:36 浏览:9556
来源:标准资料网
基本信息
标准名称: | 放射性矿产地质分析测试实验室质量保证规范 |
中标分类: |
矿业 >>
地质矿产勘察与开发 >>
地质矿产勘察与开发综合 |
ICS分类: |
采矿和矿产品 >>
采矿和挖掘
|
发布部门: | 中国核工业总公司 |
发布日期: | 1993-04-14 |
实施日期: | 1993-10-01 |
首发日期: | |
作废日期: | |
出版日期: | |
页数: | 33页 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类: 矿业 地质矿产勘察与开发 地质矿产勘察与开发综合 采矿和矿产品 采矿和挖掘
【英文标准名称】:StandardTestMethodsforAlternating-CurrentMagneticPropertiesofMaterialsatPowerFrequenciesUsingSheet-TypeTestSpecimens
【原文标准名称】:在电力频率下用薄钢板型试样对材料交流磁特性的标准试验方法
【标准号】:ASTMA804/A804M-2004(2009)e1
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:A06.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:alternatingcurrent;ammeter;coreloss;magnetic;magneticfluxdensity;magneticmaterial;magnetictest;permeability;powerfrequency;sheet;wattmeter;voltmeter;A-C(alternating-current)magneticproperties;Alternating-currentpermeability
【摘要】:MaterialsEvaluation8212;ThesetestmethodsweredevelopedtosupplementthetestingofEpsteinspecimensforapplicationsinvolvingtheuseofflat,shearedlaminationswherethetestingofEpsteinspecimensineithertheas-shearedorstress-relief-annealedconditionfailstoprovidethemostsatisfactorymethodofpredictingmagneticperformanceintheapplication.Asaprincipalexample,thetestmethodshavebeenfoundparticularlyapplicabletothecontrolandevaluationofthemagneticpropertiesofthermallyflattened,grain-orientedelectricalsteel(ConditionF5,SpecificationA876)usedaslaminationstockforcoresofpowertransformers.Inasmuchasthetestmethodscanonlybereliablyusedtodetermineunidirectionalmagneticproperties,thetestmethodshavelimitedapplicabilitytothetestingoffullyprocessednonorientedelectricalsteelsasnormallypracticed(SpecificationA677).SpecificationAcceptance8212;Thereproducibilityoftestresultsandtheaccuracyrelativetothe25-cm[250-mm]Epsteinmethodoftestareconsideredsuchastorenderthetestmethodssuitableformaterialsspecificationtesting.InterpretationofTestResults8212;Becauseofspecimensize,considerablevariationinmagneticpropertiesmaybepresentwithinasinglespecimenorbetweenspecimensthatmaybecombinedfortestingpurposes.Also,variationsmayexistintestvaluesthatarecombinedtorepresentatestlotofmaterial.Testresultsreportedwilltherefore,ingeneral,representaveragesofmagneticqualityandincertainapplications,particularlythoseinvolvingnarrowwidthsoflaminations,deviationsinmagneticperformancefromthoseexpectedfromreporteddatamayoccurattimes.Additionally,applicationoftestdatatothedesignorevaluationofaparticularmagneticdevicemustrecognizetheinfluenceofmagneticcircuitryuponperformanceandthepossibledeteriorationinmagneticpropertiesarisingfromconstructionofthedevice.RecommendedStandardTests8212;Thesetestmethodshavebeenprincipallyappliedtothemagnetictestingofthermallyflattened,grain-orientedelectricalsteelsat50and60Hz.Specificcorelossat15or17kG[1.5or1.7T]andpeakpermeability(ifrequired)at10Oe[796A/m]aretherecommendedparametersforevaluatingthisclassofmaterial.1.1Thesetestmethodscoverthedeterminationofspecificcorelossandpeakpermeabilityofsinglelayersofsheet-typespecimenstestedwithnormalexcitationatafrequencyof50or60Hz.Note18212;Thesetestmethodshavebeenappliedonlyatthecommercialpowerfrequencies,50and60Hz,butwithproperinstrumentationandapplicationoftheprinciplesoftestingandcalibrationembodiedinthetestmethods,theyarebelievedtobeadaptabletotestingatfrequenciesrangingfrom25to400Hz.1.2Thesetestmethodsusecalibrationproceduresthatprovidecorrelationwiththe25-cm[250-mm]Epsteintest.1.3Therangeoftestmagneticfluxdensitiesisgovernedbythepropertiesofthetestspecimenandbytheavailableinstrumentsandotherequipmentcomponents.Normally,nonorientedelectricalsteelscanbetestedoverarangefrom8to16kG[0.8to1.6T]forcoreloss.Fororientedelectricalsteels,thenormalrangeextendsto18kG[1.8T].Maximummagneticfluxdensitiesinpeakpermeabilitytestingarelimitedprincipallybyheating......
【中国标准分类号】:H21
【国际标准分类号】:77_140_40
【页数】:16P.;A4
【正文语种】:英语
基本信息
标准名称: | 电站锅炉产品质量分等 |
替代情况: | JB/DQ1623-90 |
发布部门: | 上海发电设备所 |
发布日期: | 1900-01-01 |
实施日期: | 1900-01-01 |
首发日期: | 1900-01-01 |
作废日期: | 1900-01-01 |
出版日期: | 1900-01-01 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类: 电工 电气设备与器具 电动工具