【英文标准名称】:StandardPracticeforMagneticParticleExaminationofSteelForgings
【原文标准名称】:钢锻件磁粉检查的标准实施规程
【标准号】:ASTMA275/A275M-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:A01.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:circularmagnetization;dcmagnetization;drymethod;fluorescentmethod;longitudinalmagnetization;steelforgings;surfaceflawdetection;wetmethod;Defects;Forgings;Magneticparticleinspection;Steelforgings;Surfaceanalysis--metals/alloys;Vi
【摘要】:Forferromagneticmaterials,magneticparticleexaminationiswidelyspecifiedforthedetectionofsurfaceandnearsurfacediscontinuitiessuchascracks,laps,seams,andlinearlyorientednonmetallicinclusions.SuchexaminationsareincludedasmandatoryrequirementsinsomeforgingstandardssuchasSpecificationA508/A508M.Useofdirectcurrentorrectifiedalternating(fullorhalfwave)currentasthepowersourceformagneticparticleexaminationallowsdetectionofsubsurfacediscontinuities.1.1Thispracticecoversaprocedureformagneticparticleexaminationofsteelforgings.Theprocedurewillproduceconsistentresultsuponwhichacceptancestandardscanbebased.Thisstandarddoesnotcontainacceptancestandardsorrecommendedqualitylevels.1.2Onlydirectcurrentorrectifiedalternating(fullorhalfwave)currentshallbeusedastheelectricpowersourceforanyofthemagnetizingmethods.Alternatingcurrentisnotpermittedbecauseitscapabilitytodetectsubsurfacediscontinuitiesisverylimitedandthereforeunsuitable.1.2.1Portablebatterypoweredelectromagneticyokesareoutsidethescopeofthispractice.Note18212;GuideE709maybeutilizedformagneticparticleexaminationinthefieldformachinerycomponentsoriginallymanufacturedfromsteelforgings.1.3TheminimumrequirementsformagneticparticleexaminationshallconformtopracticestandardsofPracticeE1444.IftherequirementsofthispracticeareinconflictwiththerequirementsofPracticeE1444,therequirementsofthispracticeshallprevail.1.4Thisspecificationandtheapplicablematerialspecificationsareexpressedinbothinch-poundunitsandSIunits.However,unlesstheorderspecifiestheapplicablex201C;Mx201D;specificationdesignation[SIunits],thematerialshallbefurnishedtoinch-poundunits.1.5ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H26
【国际标准分类号】:77_140_85
【页数】:7P.;A4
【正文语种】:英语