【英文标准名称】:Brazing-Destructivetestsofbrazedjoints
【原文标准名称】:铜焊.铜焊接头破坏试验
【标准号】:BSEN12797-2000
【标准状态】:现行
【国别】:英国
【发布日期】:2000-09-15
【实施或试行日期】:2000-09-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:硬钎焊合金;剥离试验;试样;抗拉试验;硬度试验;金相学;剪切试验;弯曲试验;铜焊;机械试验;破坏试验;连接;设计;性能;连接工艺
【英文主题词】:Bendtesting;Brazing;Brazingjoints;Destructivetesting;Hardnessmeasurement;Sheartests;Solderings;Tensiletests;Testspecimens;Testing;Weldedjoints;Weldingprocesses
【摘要】:ThisEuropeanStandarddescribesdestructivetestproceduresandtestpiecetypesnecessarytoperformthetestsonbrazedjoints.Brazedjointsareusedinawidevarietyofassembliesandthedesignrequirementsplaceduponthesejointswillalsovarywidely;therewillusuallybesomelevelofstrengthrequiredbutthismaynotbeexplicitlystatedandisfrequentlyofminorimportancecomparedtosomeothercriterion,e.g.hermeticity.Itfollowsthatatestwhichmeasuresstrengthmaybetotallyirrelevantinassessingajointforaparticularapplicationwherestrengthisaminorconsideration.Thissituationismademorecomplicatedbecausebrazedjointsarealmostinvariablydesignedtobeloadedinshearandthedimensionsofthejointaffecttheshearstrengthtoamuchgreaterextentthantheydothetensilestrength.Thetestsdescribedinthisstandardhavebeenusedsuccessfullytogiveinformationonspecificpropertiesandwheresuchinformationisneeded,itisrecommendedthatoneofthembespecified.Itisvitaltorecognizethatformanyfabricationsnoneofthesetestswillbesuitableandspecifictestswillhavetobedevised,whichdoyieldtherequisiteinformation(whichmaybequalitativeratherthenquantitative).Thedestructivetestmethodsdescribedareasfollows:a)sheartests(seeclause4);b)tensiletests(seeclause5);c)metallographicexamination(seeclause6);d)hardnesstests(seeclause7);e)peeltest(seeclause8);f)bendtests(seeclause9).Detailsofbursttestsarenotincludedasthesearenotcommonlyusedonbrazedjoints.Thetypeoftestpiecedescribedforeachtestcanbequotedorincorporatedinengineeringapplicationsstandardsthatdealwithbrazedassemblies.Theresultsofthetestsareused:1)todeterminebasicdataregardingfillermetalperformance;2)toarriveatoptimumbrazingdesigns(includinggaps)andbrazingprocedures;3)torelateproductionresultstoresultsachievedindevelopment.ThisEuropeanStandarddoesnotrecommendthenumberofsamplestobetestedortherepeattestsallowed.Neitherdoesitspecifymethodsofsamplingbrazedjoints,excepttogiveguidanceregardingtheprecautionsnecessary,nordoesitcommentontheacceptancecriteriaapplicabletoanyofthetests.Noattemptismadetodefinewhichtestortests,ifany,shouldbeappliedinanysituation.Thisisamattertobeestablishedbeforeanyparticularmethodoftestisselected.
【中国标准分类号】:J33
【国际标准分类号】:25_160_50
【页数】:34P;A4
【正文语种】:英语