ASTM E566-1999(2004)e1 黑色金属的电磁(涡电流)分级
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【英文标准名称】:StandardPracticeforElectromagnetic(Eddy-Current)SortingofFerrousMetals
【原文标准名称】:黑色金属的电磁(涡电流)分级
【标准号】:ASTME566-1999(2004)e1
【标准状态】:现行
【国别】:
【发布日期】:1999
【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】:E07.07
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:无损检验;工艺;金属;涡流试验;试验
【英文主题词】:absolutecoil;comparatorcoils;electromagneticsorting;sorting
【摘要】:Absoluteandcomparativemethodsprovideameansforsortinglargequantitiesofferrouspartsofstockwithregardtocomposition,condition,structure,orprocessing,oracombinationthereof.Thecomparativeortwo-coilmethodisusedwhenhigh-sensitivitytestingisrequired.Theadvantageofthismethodisthatitalmostcompletelysuppressesallinternalorexternaldisturbancessuchastemperaturevariationsorstraymagneticfields.Thetwo-coilmethodisnormallyusedwhenharmonicevaluationisemployedforsorting.Theabilitytoaccomplishsatisfactorilythesetypesofseparationsisdependentupontherelationofthemagneticcharacteristicsoftheferromagneticpartstotheirphysicalcondition.Thesemethodsmaybeusedforhigh-speedsortinginafullyautomatedsetupwherethespeedoftestingmayapproachtenspecimensperseconddependingontheirsizeandshape.Thesuccessofsortingferromagneticmaterialdependsmainlyontheproperselectionofmagneticfieldstrengthandfrequencyofsignalinthetestcoil,fillfactor,andvariablespresentinthesample.Thedegreeofaccuracyofasortwillbeaffectedgreatlybythecouplingbetweenthetestcoilfieldandthetestspecimenandtheaccuracywithwhichthespecimenisheldinthetestcoilfieldduringthemeasuringperiod.Whenhighcurrentsareusedinthetestcoil,ameansshouldbeprovidedtomaintainaconstanttemperatureofthereferencespecimeninordertominimizemeasurementdrift.1.1Thispracticecoverstheprocedureforsortingferrousmetalsusingtheelectromagnetic(eddy-current)method.Theprocedurerelatestoinstrumentsusingabsoluteorcomparator-typecoilsfordistinguishingvariationsinmass,shape,conductivity,permeability,andothervariablessuchashardnessandalloythataffecttheelectromagneticormagneticpropertiesofthematerial.Theselectionofspecimenstodeterminesortingfeasibilityandtoestablishstandardsisalsoincluded.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H20
【国际标准分类号】:
【页数】:5P.;A4
【正文语种】:
【原文标准名称】:黑色金属的电磁(涡电流)分级
【标准号】:ASTME566-1999(2004)e1
【标准状态】:现行
【国别】:
【发布日期】:1999
【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】:E07.07
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:无损检验;工艺;金属;涡流试验;试验
【英文主题词】:absolutecoil;comparatorcoils;electromagneticsorting;sorting
【摘要】:Absoluteandcomparativemethodsprovideameansforsortinglargequantitiesofferrouspartsofstockwithregardtocomposition,condition,structure,orprocessing,oracombinationthereof.Thecomparativeortwo-coilmethodisusedwhenhigh-sensitivitytestingisrequired.Theadvantageofthismethodisthatitalmostcompletelysuppressesallinternalorexternaldisturbancessuchastemperaturevariationsorstraymagneticfields.Thetwo-coilmethodisnormallyusedwhenharmonicevaluationisemployedforsorting.Theabilitytoaccomplishsatisfactorilythesetypesofseparationsisdependentupontherelationofthemagneticcharacteristicsoftheferromagneticpartstotheirphysicalcondition.Thesemethodsmaybeusedforhigh-speedsortinginafullyautomatedsetupwherethespeedoftestingmayapproachtenspecimensperseconddependingontheirsizeandshape.Thesuccessofsortingferromagneticmaterialdependsmainlyontheproperselectionofmagneticfieldstrengthandfrequencyofsignalinthetestcoil,fillfactor,andvariablespresentinthesample.Thedegreeofaccuracyofasortwillbeaffectedgreatlybythecouplingbetweenthetestcoilfieldandthetestspecimenandtheaccuracywithwhichthespecimenisheldinthetestcoilfieldduringthemeasuringperiod.Whenhighcurrentsareusedinthetestcoil,ameansshouldbeprovidedtomaintainaconstanttemperatureofthereferencespecimeninordertominimizemeasurementdrift.1.1Thispracticecoverstheprocedureforsortingferrousmetalsusingtheelectromagnetic(eddy-current)method.Theprocedurerelatestoinstrumentsusingabsoluteorcomparator-typecoilsfordistinguishingvariationsinmass,shape,conductivity,permeability,andothervariablessuchashardnessandalloythataffecttheelectromagneticormagneticpropertiesofthematerial.Theselectionofspecimenstodeterminesortingfeasibilityandtoestablishstandardsisalsoincluded.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H20
【国际标准分类号】:
【页数】:5P.;A4
【正文语种】:
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