【英文标准名称】:Slottedpanheadscrewswithlargehead
【原文标准名称】:大盘头槽头螺钉
【标准号】:DIN921-2006
【标准状态】:作废
【国别】:德国
【发布日期】:2006-08
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:验收规范;交货条件;设计;名称与符号;尺寸;紧固件;精密机械;材料;盘头螺钉;平头螺钉;盘头紧固件;平头紧固件;螺钉;开槽;一字槽头螺钉;槽头紧固件;规范(验收);表面防护;螺纹形状;螺纹;公差(测量);重量
【英文主题词】:
【摘要】:
【中国标准分类号】:J13
【国际标准分类号】:21_060_10
【页数】:6P;A4
【正文语种】:德语


【英文标准名称】:StandardTestMethodforAlternating-CurrentMagneticPropertiesofAmorphousMaterialsatPowerFrequenciesUsingWattmeter-Ammeter-VoltmeterMethodwithSheetSpecimens
【原文标准名称】:带片状试样使用电力表.测量表.电压表方法在电源频率下非晶材料的交流电磁性能的标准试验方法
【标准号】:ASTMA932/A932M-2001(2006)
【标准状态】:现行
【国别】:美国
【发布日期】:2001
【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】:ac;ammeter;amorphous;anneal;coreloss;excitingpower;formfactor;magnetic;peak;permeability;sheet;specific;voltmeter;wattmeter;waveform;yoke
【摘要】:Thistestmethodprovidesasatisfactorymeansofdeterminingvariousacmagneticpropertiesofamorphousmagneticmaterials.ItwasdevelopedtosupplementthetestingoftoroidalandEpsteinspecimens.Fortestingtoroidalspecimensofamorphousmaterials,refertoTestMethodA912/A912M.Theproceduresdescribedhereinaresuitableforusebymanufacturersandusersofamorphousmagneticmaterialsformaterialsspecificationacceptanceandmanufacturingcontrol.Note28212;Thistestmethodhasbeenprincipallyappliedtothemagnetictestingofthermally,magneticallyannealed,andflattenedamorphousstripat50and60Hz.Specificcorelossat13or14kG[1.3or1.4T],specificexcitingpowerat13or14kG[1.3or1.4T],andthefluxdensity,B,at1Oe[79.6A/m]aretherecommendedparametersforevaluatingpowergradeamorphousmaterials.1.1Thistestmethodcoverstestsforvariousmagneticpropertiesofflat-castamorphousmagneticmaterialsatpowerfrequencies(50and60Hz)usingsheet-typespecimensinayoke-typetestfixture.Itprovidesfortestingusingeithersingle-ormultiple-layerspecimens.Note18212;Thistestmethodhasbeenappliedonlyatfrequenciesof50and60Hz,butwithproperinstrumentationandapplicationoftheprinciplesoftestingandcalibrationembodiedinthetestmethod,itisbelievedtobeadaptabletotestingatfrequenciesrangingfrom25to400Hz.1.2Thistestmethodprovidesatestforspecificcoreloss,specificexcitingpowerandacpeakpermeabilityatmoderateandhighfluxdensities,butisrestrictedtoverysoftmagneticmaterialswithdccoercivitiesof0.07Oe[5.57A/m]orless.1.3Thetestmethodalsoprovidesproceduresforcalculatingacpeakpermeabilityfrommeasuredpeakvaluesoftotalexcitingcurrentsatmagneticfieldstrengthsuptoabout2Oe[159A/m].1.4Explanationofsymbolsandabbreviateddefinitionsappearinthetextofthistestmethod.TheofficialsymbolsanddefinitionsarelistedinTerminologyA340.1.5ThistestmethodshallbeusedinconjunctionwithPracticeA34/A34M.1.6Thevaluesstatedineithercustomary(cgs-emuandinch-pound)orSIunitsaretoberegardedseparatelyasstandard.Withinthisstandard,SIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththisstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N23
【国际标准分类号】:17_220_20
【页数】:12P.;A4
【正文语种】:英语