【英文标准名称】:Criteriaforsafetysymbols
【原文标准名称】:安全符号的准则
【标准号】:ANSIZ535.3-1991
【标准状态】:作废
【国别】:美国
【发布日期】:1991
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:紧急贮备;色码;警告符号;规范(批准);定义;安全标志;事故预防;布置;警报系统;符号;图形符号;制导系统
【英文主题词】:colourcodes;specification(approval);graphicsymbols;guidancesystems;emergencyprovisions;warningsymbols;alarmsystems;safetymarkings;accidentprevention;layout;symbols;definitions
【摘要】:
【中国标准分类号】:C65
【国际标准分类号】:01_080_00;13_320
【页数】:30P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforSolderabilityofMetallic-CoatedProducts
【原文标准名称】:金属涂覆产品的软钎焊性试验方法
【标准号】:ASTMB678-1986(2011)
【标准状态】:现行
【国别】:
【发布日期】:1986
【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】:B08.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:Inorderthatasoundsolderjointbeformedsimplyandquicklyinaproductionoperation,themoltensoldermustreadilywetandspreadoverthesurfacesoftheproductsbeingjoined.Forthistohappen,thesurfacesmustbecleanorbesoiledonlywithcontaminantsthatareeasilyremovedbyanappropriateflux.Itoftenisnecessarythatthefluxbeonlystrongenoughtoremovethenormallyoccurringsoils.Amoreaggressivefluxmaycorrodetheproductandhaveotherharmfuleffects.Nonactivatedrosininalcoholisthestandardfluxusedinthistestmethod;however,provisionismadefortheuseofotherfluxes.Sincerosinisamildflux,itprovidesbetterdiscriminationbetweenacceptableandunacceptablesolderabilityinmarginalcasesthandomoreactivefluxes.Metalliccoatingsarefrequentlyusedtoprovidesolderablesurfaces.But,animproperlyproducedcoatingmaynotyieldtherequiredsolderability.Therearemanycoatingdefectsthatcausepoorsolderabilityincludingporosity,codepositedimpurities,incorrectthickness,andsurfacecontamination.Itmaybedifficultorimpracticaltotestacoatingdirectlyforeachoftheundesirableconditions.Intheseinstancessolderabilityistested.Productsthatpassthesolderabilitytestcanbeexpectedtosoldersatisfactorilyinproduction.Inthecaseoffailuretopassthetest,thetestresultswillnotrevealthecauseoftheinadequatesolderability,though,withexperience,anoperatormaybeabletoidentifythecause.Thistestmethodmeasurestheabilityofacoatedproducttobesolderedwith60/40tin/leadsolderusinganonactivatedrosinflux.Thissolderandthisflux,oranactivatedformofit,aregenerallyusedintheassemblyofelectronicproducts.Itisintendedthatthetestedspecimensbecomponentsofelectronicproductsorarticleswiththesamegeneralshapeandmass.Articlesthataremuchmoremassivethanthiswillheatuptooslowlyduringthesolderimmersion.Ifmoremassivespecimensaretobetested,alongerimmersiontimewillhavetobeused,thetimetobedeterminedbyexperiment.Ifthespecimentestedislongerthan25mm,itsbottomendwillbeinthesolderforsignificantlylongerthanthespecifiedtime.Therefore,ifthespecimenislongerthan25mm,theresultsobtainedatthebottomendofthespecimenareinvalid.Thispartofthespecimenshallbediscountedintheevaluationoftheresults.Asecondsetoftestscanberunonadditionalspecimensinwhichthespecimensareonlypartlyimmersed.Thesewouldbeusedtoevaluatethebottomends.1.1Thistestmethodprovidesaprocedureforevaluatingthesolderabilityofmetallic-coatedproductsandtestspecimenstoassuresatisfactoryperformanceinmanufacturingprocessesrequiringsolderingwithsoft(tin-lead)solderandrosinflux.Thistestmethodisapplicableonlyfortestingcoatingsthatarenormallyreadilysolderablesuchas:tin,tin-leadalloy,silver,andgold.1.2Thistestmethodisqualitativeandbroadlyapplicable.Itiseasytoperformandrequiresonlysimpleequipment.Thereareothersolderabilitytestsnotcoveredbythistestmethodthataremoreapplicabletospecificsituations,yieldquantitativeresults,orboth.Severalaredescribedintheliterature.Thisisax201C;go-no-gox201D;testanddoesnotgradesolderabilityasexcellent,good,fair,andsoforth.1.3Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:25_160_50
【页数】:3P.;A4
【正文语种】:
基本信息
| 标准名称： | 军用磁光盘通用规范 |
| 英文名称： | General specification for military Magneto-optical disk cartridges |
| 中标分类： |
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| 发布日期： | 2000-10-20 |
| 实施日期： | 2000-10-20 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 16页 |
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