BS EN 60893-3-3-1995 电工用热固性树脂基工业刚性层压板规范.各型材料规范.三聚氰胺树脂基刚性层压薄板的要求

上一篇: BS EN 60521-1995 等级为0.5、1和2的交流瓦特表
下一篇: BS 6893 Pt.3 Sec.403 to 405-1995 电气用柔性绝缘套管.特殊类型套管的要求规范.带丙烯酸酯基涂层的纺织玻璃纤维套管

【英文标准名称】:DigitalVideoServiceMultiplexandTransportSystemforCableTelevision
【原文标准名称】:多路电视用数字视频业务多路转换系统
【标准号】:ANSI/SCTE54-2002
【标准状态】:作废
【国别】:美国
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:M60
【国际标准分类号】:35_100_40;33_170
【页数】:
【正文语种】:英语


【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