VW 孔隙率标准 2007版

GroupStandardVW50097Issue2007-07Class.No.:A6600Descriptors:casting,lightalloycasting,metalcasting,pore,porosityPage1of6Checkstandardforcurrentissuepriortousage.TheEnglishtranslationisbelievedtobeaccurate.IncaseofdiscrepanciestheGermanversionshallgovern.Numericalnotationacc.toISOpractice.Thiselectronicallygeneratedstandardisauthenticandvalidwithoutsignature.TechnicalresponsibilityStandardsdepartmentK-GQL-2Dr.StephanEisenbergK-GQL-2/1HannesWendtTel.:[phone]EKTC/4GabrielaBochynekTel.:[phone]EKTCManfredTerlindenConfidential.Allrightsreserved.NopartofthisdocumentmaybetransmittedorreproducedwithoutthepriorpermissionofaStandardsDepartmentwithintheVolkswagenGroup.ContractpartnersshallobtainthestandardonlythroughtheB2Bsupplierplatform©VOLKSWAGENAGvwnorm-2007-07PorosityofMetalCastingsRequirementsPreviousissues2002-12ChangesThefollowingchangeshavebeenmadeascomparedtoVolkswagenstandardVW50097,2002-12:─Section1:Scopechanged─Section2.1:Sectionheadingaddedandchangesimplemented─Section2.2:Newlyadded─Section4.2:Changed─Section5:TestSpecificationPV6097addedContentsPage1Scope..................................................................................................................................22Designation.........................................................................................................................22.1Explanationofthedesignationsystem................................................................................22.2Gradingofporosityspecificationsindrawings....................................................................43Definitions...........................................................................................................................44Requirements......................................................................................................................44.1Deliveryofcomponents.......................................................................................................44.2Definitionofporosity............................................................................................................55Testingofporosity...............................................................................................................66Recourseclaims..................................................................................................................67Referencedstandards.........................................................................................................6Page2IssueVW50097:2007-071ScopeThepresentstandarddefinestherequirementsontheporosityofmetalcastingsregardlessofthecastingprocessused.2DesignationTheunderlyingdesignationsystemandthedefinitionofthereferencesurfacescorrespondtotheVDG(AssociationofGermanCastingExperts)SpecificationP201.2.1ExplanationofthedesignationsystemDetailsonthedesignationsystemaregivenintheVDGSpecificationP201.Thedesignationsystemforporosityconsistsofthefollowingparameters:Poreclasses─Sforcomponentsunderstaticstressmainly─Dforcomponentsunderdynamicstressmainly─Fforcomponentswithspecialrequirementsonfunctionalsurfaces─GforcomponentswithnotfurtherspecifiedrequirementsPorosity─maximumpermissibleporosityinpercentfortheporeclassesS,DandG─maximumpermissiblenumberofdefinedporesperreferencesurfacefortheporeclassFDiameter(optional)─maximumpermissiblecomparativediameterofsingleporesAdditionalremark(additionalremark1tonisoptional,PnshallbegivenforspecificationsonporeclassF)─AnMinimumedgedistancebetweentwoadjacentpores.Theminimumedgedistanceisthediameterofthesmalleroftwoadjacentporesmultipliedbytheintegerfactorninmm(A=distance;fromGermanAbstand).─MCenterofcomponentwall(onlyinconnectionwiththeparameterdiameter);Localizedporosityisonlypermissibleinthecenter(M;fromGermanMitte)ofthecomponentwall.─CExcessmaterial(onlyinconnectionwiththeparameterdiameter).Localizedporosityisonlypermissibleinexcessmaterialandjointareas.─RCenterareaofthecomponentwall(onlypermissibleforporeclassesD10toD30).Onlyappliestothecenterarea(R)ofthecomponentwall(innerthirdoftherelevantwallthickness).InthetwoouterthirdstheporosityclassD4shallbeadheredto.─PnPoresize(onlyinconnectionwiththeparameterdiameter).Maximumpermissibleporesize(definedbytheparameterdiameter);onlyappliestothecomponentwallcenterarea(innerthirdoftherelevantwallthickness).Inthetwoouterthirdsthemaximumpermissibleporesize(P)ofsingleporesislimitedtoadiameterofnmm.InporeclassF,nspecifiesthediameteruptowhichporesarenotconsidered.Page3IssueVW50097:2007-07Representation:(poreclass)(porosity)/[diameter]/[additionalremark1]/[...]/[additionalremarkn]NOTE:Theparametersinroundbracketsatleastarerequiredtoadequatelydescribethepermissibleporosity.Theparametersinsquarebracketsareoptional,theparameterPshallbegiveniftheporeclassFisspecified.InthecaseofexclusiveporosityspecificationsforanX-raytest,itshallbeobservedthatfullyautomatedsystemsforevaluatingtheporesizegenerallyonlyusetheequivalentdiameter.Inthecaseofamanual,comparativeX-raytest,however,theevaluationisal