ASTM E1312-2009 居里温度以上铁磁圆柱棒产品的电磁(涡流)检验的标准实施规程

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【英文标准名称】:StandardPracticeforElectromagnetic(Eddy-Current)ExaminationofFerromagneticCylindricalBarProductAbovetheCurieTemperature
【原文标准名称】:居里温度以上铁磁圆柱棒产品的电磁(涡流)检验的标准实施规程
【标准号】:ASTME1312-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:
【英文主题词】:artificialdiscontinuity;curietemperature;electricaltransientnoise;electronicallygeneratedsignal;encirclingcoil;ferromagneticcylindricalbar;fluxchange;in-line-eddy-currentexamination;magneticorelectrostaticshield;phase;sens
【摘要】:Thepurposeofthispracticeistodescribeaprocedureforin-line-eddy-currentexaminationofhotcylindricalbarsintherangeofdiameterslistedin1.2forlargeandrepetitivediscontinuitiesthatmayformduringprocessing.Thediscontinuitiesinbarproductcapableofbeingdetectedbytheelectromagneticmethodarelistedin1.3.1.Themethodiscapableofdetectingsurfaceandsomesubsurfacediscontinuitiesthataretypicallyintheorderof0.030in.(0.75mm)anddeeper,butsomeshallowerdiscontinuitiesmightalsobefound.Discontinuitiesthatarenarrowanddeep,butshortinlength,arereadilydetectablebybothprobeandencirclingcoilsbecausetheycauseabruptfluxchanges.Surfaceandsubsurfacediscontinuities(iftheelectromagneticfrequencyprovidessufficienteffectivedepthofpenetration)canbedetectedbythismethod.Discontinuitiessuchasscratchesorseamsthatarecontinuousanduniformforthefulllengthofcutlengthbarsorextendforextensivelineardistancesincoiledproductmaynotalwaysbedetectedwhenencirclingcoilsareused.Thesearemoredetectablewithprobecoilsbyinterceptingthediscontinuityintheirrotationaroundthecircumference.Theorientationandtypeofcoilareimportantparametersincoildesignbecausetheyinfluencethedetectabilityofdiscontinuities.Theeddycurrentmethodissensitivetometallurgicalvariationsthatoccurasaresultofprocessing,thusallreceivedsignalsabovethealarmlevelarenotnecessarilyindicativeofdefectiveproduct.1.1Thispracticecoversproceduresforeddy-currentexaminationofhotferromagneticbarsabovetheCurietemperaturewheretheproductisessentiallynonmagnetic,butbelow2100x00B0;F(1149x00B0;C).1.2Thispracticeisintendedforuseonbarproductshavingdiametersofx00BD;in.(12.7mm)to8in.(203mm)atlinearthroughputspeedsupto1200ft/min(366m/min).Largerorsmallerdiametersmaybeexaminedbyagreementbetweentheusingparties.1.3Thepurposeofthispracticeistoprovideaprocedureforin-lineeddy-currentexaminationofbarsduringprocessingforthedetectionofmajororgrosssurfacediscontinuities.1.3.1Thetypesofdiscontinuitiescapableofbeingdetectedarecommonlyreferredtoas:slivers,laps,seams,roll-ins(scale,dross,andsoforth),andmechanicaldamagesuchasscratches,scores,orindentations.1.4Thispracticedoesnotestablishacceptancecriteria.Theymustbespecifiedbyagreementbetweentheusingparties.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.6Thispracticedoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthispracticetoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H26
【国际标准分类号】:
【页数】:4P.;A4
【正文语种】:英语