JB/T 4007-1999 熔模铸造涂料 试验方法
时间:2024-05-06 03:21:52 来源: 标准资料网 作者:标准资料网 阅读:9975
基本信息
标准名称: | 熔模铸造涂料 试验方法 |
英文名称: | Test method of slurry for investment cassting |
中标分类: |
机械 >>
加工工艺 >>
铸造 |
ICS分类: |
试验 >>
机械试验
|
替代情况: | JB 4007-85 |
发布部门: | 全国铸造标准化技术委员会 |
发布日期: | 1999-06-24 |
实施日期: | 2000-06-24 |
首发日期: | 1900-01-01 |
作废日期: | 1900-01-01 |
归口单位: | 全国铸造标准化技术委员会 |
出版日期: | 1900-01-01 |
页数: | 14 页 |
批文号: | 国机管[1999]353号 |
适用范围
JB/T 4007-1999 本标准是对 JB 4007-85《熔模铸造涂料 试验方法》的修订,修订时仅按有关规定作了编辑性修改,主要技术内容未改变。 本标准适用于熔模铸造用水玻璃粘结剂和涂料、硅酸乙酯粘结剂和涂料性能测试。
前言
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目录
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引用标准
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所属分类: 机械 加工工艺 铸造 试验 机械试验
【英文标准名称】:IntegratedServicesDigitalNetwork(ISDN)-ExplicitCallTransfer(ECT)supplementaryservice-Servicedescription(EndorsementoftheEnglishversionEN300367V1.2.1(1998-10)asGermanstandard)
【原文标准名称】:综合业务数字网(ISDN).显式呼叫转接(ECT)补充业务.业务描述
【标准号】:DINEN300367-2000
【标准状态】:现行
【国别】:德国
【发布日期】:2000-09
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:通信网;化合物;电信设备;服务设施;再定位;电信;电信;呼叫传输;服务定义
【英文主题词】:Calltransmission;Communicationnetworks;Communicationservice;Compound;ISDN;Relocation;Servicedefinition;Services;Telecommunication;Telecommunications
【摘要】:Thedocumentspecifiesrequirementsinthetelecommunicationssector.
【中国标准分类号】:M11
【国际标准分类号】:33_080
【页数】:1P;A4
【正文语种】:德语
【英文标准名称】:Ambientair-Determinationofasbestosfibres-Indirect-transfertransmissionelectronmicroscopymethod
【原文标准名称】:环境空气石棉纤维的测定间接传递电子显微镜法
【标准号】:ISO13794-1999
【标准状态】:现行
【国别】:国际
【发布日期】:1999-07
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC146
【标准类型】:()
【标准水平】:()
【中文主题词】:石棉粉;定义;定义;含量测定;石棉;环境空气;显微分析;空气污染;空气质量
【英文主题词】:Airpollution;Airquality;Ambientair;Asbestos;Asbestosdust;Definition;Definitions;Determinationofcontent;Microscopicanalysis
【摘要】:1SubstancedeterminedThisInternationalStandardspecifiesareferencemethodusingtransmissionelectronmicroscopy(TEM)fordeterminationoftheconcentrationofasbestosstructuresinambientatmospheres.Thespecimenpreparationprocedureincorporatesashinganddispersionofthecollectedpaniculate,sothatallasbestosismeasured,includingtheasbestosoriginallyincorporatedinparticleaggregatesorparticlesofcompositematerials.Thelengths,widthsandaspectratiosoftheasbestosfibresandbundlesaremeasured,andthese,togetherwiththedensityofthetypeofasbestos,alsoallowthetotalmassconcentrationofairborneasbestostobecalculated.Themethodallowsdeterminationofthetype(s)ofasbestosfibrepresent.Themethodcannotdiscriminatebetweenindividualfibresoftheasbestosandnon-asbestosanaloguesofthesameamphibolemineral.2TypeofsampleThemethodisdefinedforpolycarbonatecapillary-porefiltersorcelluloseester(eithermixedestersofcelluloseorcellulosenitrate)filtersthroughwhichaknownvolumeofairhasbeendrawn.Themethodissuitablefordeterminationofasbestosinbothexteriorandbuildingatmospheres.3RangeTheupperlimitfortherangeofconcentrationthatcanbemeasuredontheanalyticalfilteris7000structures/mm.Thelowerlimitoftherangethatcanbemeasuredontheanalyticalfiltercorrespondstodetectionof2,99structuresintheareaofspecimenexamined.Theairconcentrationsrepresentedbythesevaluesareafunctionofthevolumeofairsampledandthedegreeofdilutionorconcentrationselectedduringthespecimenpreparationprocedures.Themethodisparticularlyapplicableformeasurementsinareaswithhighsuspended-particulateconcentrations(exceeding10μg/m),orwheredetectionandidentificationofasbestosfibresarelikelytobepreventedorhinderedbyothertypesofparticulateindirect-transferTEMpreparations.Intheory,thereisnolowerlimittothedimensionsofasbestosfibreswhichcanbedetected.Inpractice,microscopistsvaryintheirabilitytodetectverysmallasbestosfibres.Therefore,aminimumlengthof0,5μmhasbeendefinedastheshortestfibretobeincorporatedinthereportedresults.4LimitofdetectionThelimitofdetectiontheoreticallycanbeloweredindefinitelybyfiltrationofprogressivelylargervolumesofair,concentratingthesampleduringspecimenpreparation,andbyextendingtheexaminationofthespecimensintheelectronmicroscope.Inpractice,thelowestachievablelimitofdetectionforaparticularareaofTEMspecimenexaminediscontrolledbythetotalsuspendedparticulateconcentrationremainingaftertheashingandaqueousdispersalsteps,andthisdependsonthechemicalnatureofthesuspendedparticulate.Fortotalsuspendedparticulateconcentrationsofapproximately10μg/m,correspondingtoclean,ruralatmospheres,andassumingfiltrationof4000litresofair,ananalyticalsensitivityof0,5structure/litrecanbeobtained,equivalenttoalimitofdetectionof1,8structures/litre,ifanareaof0,195mmoftheTEMspecimensisexamined.LowerlimitsofdetectioncanbeachievedbyincreasingtheareaoftheTEMspecimenthatisexamined,orbyconcentrationofthesampleduringspecimenpreparation.Inordertoachievelowerlimitsofdetectionforfibresandbundleslongerthan5μm,andforPCM-equivalentfibres,lowermagnificationsarespecifiedwhichpermitmorerapidexaminationoflargerareasoftheTEMspecimenswhentheexaminationislimitedtothesedimensionsoffibre.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_20
【页数】:64P;A4
【正文语种】:英语