【英文标准名称】:StandardDigitalReferenceImagesforInvestmentSteelCastingsforAerospaceApplications
【原文标准名称】:航空航天用熔模钢铸件用标准数字参考图像
【标准号】:ASTME2660-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:E07.02
【标准类型】:(Reference)
【标准水平】:()
【中文主题词】:
【英文主题词】:aerospace;digitalreferenceimage;discontinuities;investmentcastings;nickel;steel;X-ray
【摘要】:Thesedigitalreferenceimagesareintendedforreferenceonly,butaredesignedsuchthatacceptancestandards,whichmaybedevelopedforparticularrequirements,canbespecifiedintermsofthesedigitalreferenceimages.Theillustrationsaredigitalimagesofcastingsthatwereproducedunderconditionsdesignedtodevelopthediscontinuities.GradedDiscontinuities:Gasholes,spongeshrinkage,dendriticshrinkage,lessdenseforeignmaterial(1)Theimagesofthe1/8-in(3.2-mm)castingsareintendedtobeusedinthethicknessrangeuptoandincludingx00BC;-in(6.3-mm).Theimagesofthe3/8-in(9.5-mm)castingsareintendedtobeusedinthethicknessrangeofoverx00BC;-in(6.4-mm),uptoandincludingx00BD;-in(12.7-mm).Theimagesofthex00BE;-in(19.1-mm)castingsareintendedtobeusedinthethicknessrangeofoverx00BD;-in(12.7-mm),uptoandincluding1-in.(25.4-mm).CavityShrinkage,FilamentaryShrinkage:(1)Theimagesofthex00BE;-in(19.1-mm)castingsareintendedtobeusedinthethicknessrangeuptoandincluding1-in.(25.4-mm).UngradedDiscontinuities:Theimagesofthe3/8-in(9.5-mm)castingsareintendedtobeusedinthethicknessrangeuptoandincluding1-in.(25.4-mm).ImageDeterioration8212;Manyconditionscanaffecttheappearanceandfunctionalityofdigitalreferenceimages.Forexample,electricalinterference,hardwareincompatibilities,andcorruptedfilesanddriversmayaffecttheirappearance.ThePracticeE2002linepairgaugeslocatedineachdigitalreferenceimagecanbeusedasanaidtodetectimagedeteriorationbycomparingthemeasuredresolutionusingthegaugestotheresolutionstatedonthedigitalreferenceimage.Donotusethedigitalreferenceimagesiftheirappearancehasbeenadverselyaffectedsuchthattheinterpretationanduseoftheimagescouldbeinfluenced.Agreementshouldbereachedbetweencognizantengineeringorganizationandthesupplierthatthesystemusedbythesupplieriscapableofdetectingandclassifyingtherequireddiscontinuities.1.1Thedigitalreferenceimagesprovidedintheadjuncttothisstandardillustratevarioustypesanddegreesofdiscontinuitiesoccurringinthin-wallsteelinvestmentcastings.Useofthisstandardforthespecificationorgradingofcastingsrequiresprocurementoftheadjunctdigitalreferenceimageswhichillustratethediscontinuitytypesandseveritylevels.Theyareintendedtoprovidethefollowing:1.1.1Aguideenablingrecognitionofthin-wallsteelcastingdiscontinuitiesandtheirdifferentiationbothastotypeanddegreethroughdigitalradiographicexamination.1.1.2Exampledigitalradiographicillustrationsofdiscontinuitiesandanomenclatureforreferenceinacceptancestandards,specificationsanddrawings.1.2Twoillustrationcategoriesarecoveredasfollows:1.2.1Graded8212;Sixcommondiscontinuitytypeseachillustratedineightdegreesofprogressivelyincreasingseverity.1.2.2Ungraded