2023年全國碩士研究生考試考研英語一試題真題（含答案詳解+作文范文）_第1頁
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1、Designation:B985?12StardPracticefSamplingAluminumIngotsBilletsCastingsFinishedSemiFinishedWroughtAluminumProductsfCompositionalAnalysis1ThisstardisissuedunderthefixeddesignationB985thenumberimmediatelyfollowingthedesigna

2、tionindicatestheyearofiginaladoptioninthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thispracti

3、cedescribesproceduresfsamplingunwroughtaluminumingotsbilletscastingsfinishedsemifinishedwroughtaluminumproductstoobtainarepresentativesamplefdeterminingchemicalcomposition.1.1.1Chemicalcompositionsdeterminedfromsamplesob

4、tainedinaccdancewiththisstardpracticemaydifferfromthebulkchemicalcompositiondeterminedfromsamplestakenwheningotscastingsarepoured.Thesedifferencescanbeduetoelementalsegregationthatoccursduringsolidificationproceduresthat

5、removeenrichedmaterial(e.g.ingotscalping)proceduresthatremovedepletedareas(e.g.removaloftheriserfromacasting).1.1.2Analysisofsamplesobtainedfromunwroughtaluminumingotsbilletscastingsfinishedsemifinishedwroughtaluminumpro

6、ductscanbeusedtodetermineifthepiecesampledmeetsTheAluminumAssociationInc.registeredchemicalcompositionlimitsotherspecifiedchemicalcompositionlimitsfthealloy.Analysisofsuchsamplesshallnotsupersedetheanalysisofsamplestaken

7、duringpouringofcastingsingotsinaccdancewithE716analyzedinaccdancewithE607E1251E34EN14242shallnotbeusedfdeterminingcompliancewithchemicalcompositionrequirementsfanentirecastlotpartthereof.NOTE1—Piecesmayincludeingotsfging

8、scoilssheetsextrusionscastingsetc.Asingleunwroughtingotbilletmayproducemultiplefinishedsemifinishedpieces.NOTE2—CertificationofentirecastlotsshouldbedeterminedusingsamplestakenduringpouringofcastingsingotsinaccdancewithE

9、716analyzedinaccdancewithE607E1251E34EN14242.1.2Units—ThevaluesstatedineitherSIunitsinchpoundunitsaretoberegardedseparatelyasstard.Thevaluesstatedineachsystemmaynotbeexactequivalentstherefeeachsystemshallbeusedindependen

10、tlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconfmancewiththestard.1.3Thisstarddoesnotpurpttoaddressallofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappro

11、priatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDocuments2.1ASTMStards:2B881TerminologyRelatingtoAluminumMagnesiumAlloyProductsE34TestMethodsfChemicalAnalysisofAluminumAlumin

12、umBaseAlloysE135TerminologyRelatingtoAnalyticalChemistryfMetalsesRelatedMaterialsE607TestMethodfAtomicEmissionSpectrometricAnalysisAluminumAlloysbythePointtoPlaneTechniqueNitrogenAtmosphere(Withdrawn2011)3E716PracticesfS

13、amplingSamplePreparationofAluminumAluminumAlloysfDeterminationofChemicalCompositionbySpectrochemicalAnalysisE1251TestMethodfAnalysisofAluminumAluminumAlloysbySparkAtomicEmissionSpectrometry2.2OtherStards:4EN14242Aluminum

14、aluminumalloys–Chemicalanalysis–Inductivelycoupledplasmaopticalemissionspectralanalysis3.Terminology3.1FdefinitionsoftermsusedinthisStardrefertoTerminologiesE135B881.4.SummaryofPractice4.1Theproceduresdescribedinthisprac

15、ticeinvolvethecuttingdrillingofaluminumproductstoobtainsamplesf1ThispracticeisunderthejurisdictionofASTMCommitteeB07onLightMetalsAlloysisthedirectresponsibilityofSubcommitteeB07.05onTesting.CurrenteditionapprovedDec.1201

16、2.PublishedJanuary2013.DOI:10.1520B098512.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.3Thelas

17、tapprovedversionofthishisticalstardisreferencedonwww.astm.g.4AvailablefromEuropeanCommitteefStardizationCentralSecretariat(CEN)ruedeStassart36B1050BrusselsBelgium.:www.cen.euesearch.Copyright?ASTMInternational100BarrHarb

18、DrivePOBoxC700WestConshohockenPA194282959.UnitedStates1separately.Whenanalyzedseparatelythechemicalcompositionreptedshouldbetheaverageanalysisdeterminedfrommultipleremeltcastlabatysamplesfeachelementanalyzed.NOTE8—Remelt

19、ingisnotsatisfactyfthedeterminationofcalciumlithiumsodiumstrontium.Theseelementsmaybelostduetooxidationvolatilization.CalciumlithiumsodiumstrontiumshouldbeanalyzedaccdingtoE34EN14242bydirectanalysisonthesurfaceoftheigina

20、lpieceaccdingtoE1251E607resultsreptedasapproximate.NOTE9—Becausemagnesiumzincmaybelostifthemeltisoverheatedkeptmoltenfanexcessivetimethesampleshouldbecastassoonaspossibleafteritreachesatemperatureof700C.6.2.4Usingasawequ

21、ippedwithacarbidediamondtippedbladeshouldprovidesatisfactysamples.NOTE10—Theuseofbaresteelsawbladesmaycontaminatethesamplewithiron.6.2.4.1Cleaning—Oilgreasemayberemovedfromthesamplesbyrinsingwithalcoholthendryingbefetaki

22、ngthelabatysample.Scaledirtmayberemovedbywashingwithsoapwaterthenrinsingwithdistilleddeionizedwaterdryingbefetakingthelabatysample.Additionalchemicalcleaningsuchassoakingthesamplesin1%(byvolume)nitricacidmaybenecessaryto

23、removeembeddedcontaminates.Othercleaningmethodsmaybeusedprovidedtheydonotalterthechemicalcompositioninanyway.(Warning—Chipsothercutsamplesmustbedrybefemelting.Moisturecapturedinthematerialmaycauseittoejectheatedmetalmolt

24、enmaterialcauseinjury!)7.ProcedurefObtainingSamplesbyProductType7.1IngotsBilletsRound:7.1.1SamplingaRoundIngotbyDrilling—Pritodrillingmetalmustberemovedcroppedfromtheheadbuttofroundingots.Fingots250mm[10in.]lessindiamete

25、rremovecropatleast1.5timesthediameterfromtheheadbuttoftheingot.Fingotsgreaterthan250mm[10in.]indiameterremovecropatleast380mm[15in.]fromtheheadbuttoftheingot.7.1.1.1Drillholesinboththefrontrearoftheingotasdescribedbelows

26、howninFig.1.7.1.1.2Drilltwoholesneartheouteredgeapproximately5mm[0.2in.]awayfromtheascastsurface.7.1.1.3Drilloneholenearthecenter.7.1.1.4Drillthreeholesintheregionapproximatelywaybetweentheholesattheouteredgethecenter.7.

27、1.1.5Drillholesatleast25mm[1in.]intotheface.Drillingsfromthefrontrearoftheingotshallbetreatedasseparatelabatysamplesanalyzedseparately.Theresultsmaybereptedasindividualsamplesastheaverage.Bothsampleshowevermustbewithinth

28、especificationchemicalcompositionlimits.Thepiecesampleddoesnotmeetthespecificationchemicalcompositionlimitsifoneofthesamplesisoutsideofthechemicalcompositionlimitseveniftheaverageiswithinthespecification.7.1.1.6Ifmedrill

29、inglocationsarerequiredtomakeuptherequiredsampleweightrepeattheabovepattern.DrillingsfromadditionallocationsaretobecombinedwiththeotherdrillingsfromtheheadbuttlocationsshowninFig.1.7.1.2SamplingaBilletbyDrilling—Drillhol

30、esinboththefrontrearofthebilletasdescribedbelowshowninFig.1.7.1.2.1Drilltwoholesneartheouteredgeapproximately5mm[0.2in.]awayfromtheascastsurface.7.1.2.2Drilloneholenearthecenter.7.1.2.3Drillthreeholesintheregionapproxima

31、telywaybetweentheholesattheouteredgethecenter.7.1.2.4Drillholesatleast25mm[1in.]intotheface.Drillingsfromthefrontrearshallbetreatedasseparatelabatysamplesanalyzedseparately.Theresultsmaybereptedasindividualsamplesastheav

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