JB/T 9482-1999 杠杆式天平刀子、刀承
时间:2024-05-08 13:54:11 来源: 标准资料网 作者：标准资料网 阅读：8248
基本信息
| 标准名称： | 杠杆式天平刀子、刀承 |
| 英文名称： | Knife-edge and edge bearing for lever balance |
| 中标分类： |
仪器、仪表 >>
仪器、仪表综合 >>
仪器、仪表用材料和元件 |
| ICS分类： |
|
| 替代情况： | 原标准号ZB N61010-1988;被JB/T 9482-2011代替 |
| 发布部门： | 国家机械工业局 |
| 发布日期： | 1999-08-06 |
| 实施日期： | 2000-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2011-11-01 |
| 提出单位： | 仪器仪表元器件标准化技术委员会 |
| 归口单位： | 仪器仪表元器件标准化技术委员会 |
| 起草单位： | 沈阳仪器仪表工艺研究所 |
| 出版社： | 机械工业出版社 |
| 出版日期： | 2000-01-01 |
| 页数： | 11页 |
适用范围
本标准规定了杠杆式天平刀子、刀承的分类、要求、试验方法、检验规则及标志、包装和贮存。本标准适用于最大称量1g ～1OOkg，相对准确度1x10-7～10 的杠杆式天平用的刀子、刀承（以下简称刀子、刀承)。
前言
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所属分类： 仪器 仪表 仪器 仪表综合 仪器 仪表用材料和元件
【英文标准名称】:StandardTestMethodforTensileStrengthofMonolithicAdvancedCeramicsatElevatedTemperatures
【原文标准名称】:高温下单值高级陶瓷抗拉强度的标准试验方法
【标准号】:ASTMC1366-2004(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:C28.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:advancedceramic;elevatedtemperatures;percentbending;tensilestrength;tensiletesting;Advancedceramics;Elevatedtemperaturetests;Monolithicadvancedceramics;Tensileproperties/testing--ceramics
【摘要】:Thistestmethodmaybeusedformaterialdevelopment,materialcomparison,qualityassurance,characterization,reliabilityassessment,anddesigndatageneration.Highstrength,monolithicadvancedceramicmaterialsaregenerallycharacterizedbysmallgrainsizes(x003C;50x03BC;m)andbulkdensitiesnearthetheoreticaldensity.Thesematerialsarecandidatesforload-bearingstructuralapplicationsrequiringhighdegreesofwearandcorrosionresistanceandelevated-temperaturestrength.Althoughflexuraltestmethodsarecommonlyusedtoevaluatestrengthofadvancedceramics,thenonuniformstressdistributionoftheflexurespecimenlimitsthevolumeofmaterialsubjectedtothemaximumappliedstressatfracture.Uniaxially-loadedtensilestrengthtestsprovideinformationonstrength-limitingflawsfromagreatervolumeofuniformlystressedmaterial.Becauseoftheprobabilisticstrengthdistributionsofbrittlematerialssuchasadvancedceramics,asufficientnumberoftestspecimensateachtestingconditionisrequiredforstatisticalanalysisandeventualdesignwithguidelinesforsufficientnumbersprovidedinthistestmethod.Size-scalingeffectsasdiscussedinpracticeC1239willaffectthestrengthvalues.Therefore,strengthsobtainedusingdifferentrecommendedtensiletestspecimengeometrieswithdifferentvolumesorsurfaceareasofmaterialinthegagesectionswillbedifferentduetothesesizedifferences.Resultingstrengthvaluescan,inprinciple,bescaledtoaneffectivevolumeoreffectivesurfaceareaofunityasdiscussedinPracticeC1239.Tensiletestsprovideinformationonthestrengthanddeformationofmaterialsunderuniaxialstresses.Uniformstressstatesarerequiredtoeffectivelyevaluateanynon-linearstress-strainbehaviorwhichmaydevelopastheresultoftestingmode,testingrate,processingoralloyingeffects,environmentalinfluences,orelevatedtemperatures.Theseeffectsmaybeconsequencesofstresscorrosionorsubcritical(slow)crackgrowthwhichcanbeminimizedbytestingatappropriatelyrapidratesasoutlinedinthistestmethod.Theresultsoftensiletestsofspecimensfabricatedtostandardizeddimensionsfromaparticularmaterialorselectedportionsofapart,orboth,maynottotallyrepresentthestrengthanddeformationpropertiesoftheentire,full-sizeendproductoritsin-servicebehaviorindifferentenvironments.Forqualitycontrolpurposes,resultsderivedfromstandardizedtensiletestspecimenscanbeconsideredtobeindicativeoftheresponseofthematerialfromwhichtheyweretakenforparticularprimaryprocessingconditionsandpost-processingheattreatments.Thetensilestrengthofaceramicmaterialisdependentonbothitsinherentresistancetofractureandthepresenceofflaws.AnalysisoffracturesurfacesandfractographyasdescribedinPracticeC1322andMIL-HDBK-790,thoughbeyondthescopeofthistestmethod,arerecommendedforallpurposes,especiallyfordesigndata.1.1Thistestmethodcoversthedeterminationoftensilestrengthunderuniaxialloadingofmonolithicadvancedceramicsatelevatedtemperatures.Thistestmethodaddresses,butisnotrestrictedto,varioussuggestedtestspecimengeometriesaslistedintheappendix.Inaddition,testspecimenfabricationmethods,testingmodes(force,displacement,orstraincontrol),testingrates(forcerate,stressrate,displacementrate,orstrainrate),allowablebending,anddatacollectionandreportingproceduresareaddressed.Tensilestrengthasusedinthistestmethodreferstothetensilestrengthobtainedunderuniaxialloading.1.2Thistestmethodappliesprimarilytoadvancedceramicswhichmacroscopicallyexhibiti......
【中国标准分类号】:Q32
【国际标准分类号】:81_060_30
【页数】:27P.;A4
【正文语种】:英语
【英文标准名称】:Waterquality-Determinationofadsorbableorganicallyboundhalogens(AOX)
【原文标准名称】:水质.可吸附卤素(AOX)的测定
【标准号】:ISO9562-2004
【标准状态】:现行
【国别】:国际
【发布日期】:2004-09
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC147
【标准类型】:()
【标准水平】:()
【中文主题词】:定义;吸附水;卤素;水常规;活性碳;方法;氯有机化合物;有机物质;化学分析和试验;分析;还原;含量测定;无机化合物;氯;化学反应;水质分析;挥发性的;微库仑分析法;溴;表面吸附;水质试验;有机化合物;还原剂;仪器;碘;溴有机化合物;化合物;浓缩;水;质量;调查方法;水质;氯化物;抽样方法;稀释;水试样;卤化合物;测定
【英文主题词】:Activatedcarbon;Adsorbedwater;Adsorption;Analysis;Bromine;Bromineorganiccompounds;Chemicalanalysisandtesting;Chemicalreactions;Chemicals;Chlorides;Chlorine;Chlorineorganiccompounds;Concentration;Definitions;Determination;Determinationofcontent;Dilution;Halogen;Halogencompounds;Inorganiccompounds;Instruments;Investigationmethods;Iodine;Methods;Microcoulometry;Organiccompounds;Organicmatters;Quality;Reducingagents;Reduction;Samplingmethods;Volatile;Water;Wateranalysis;Waterpractice;Waterquality;Watersamples;Watertesting
【摘要】:ThisInternationalStandardspecifiesamethodforthedirectdeterminationofanamountofusually10μg/linwateroforganicallyboundchlorine,bromineandiodine(expressedaschloride)adsorbableonactivatedcarbon.Thismethodisapplicabletotestsamples(see9.2)withconcentrationsofinorganicchlorideionsoflessthan1g/l.Sampleswithhigherconcentrationsaredilutedpriortoanalysis.Thismethodisalsoapplicabletosamplescontainingsuspendedsolidswherehalogensareadsorbedontothesolidmatter(e.g.insolublehalides).Filtrationofthesamplebeforeanalysisallowstheseparatedeterminationofdissolvedandparticulateadsorbableorganicallyboundhalogens(AOX).Filteredsampleswithhighinorganicchloridecontentcanbeanalysedbyamodifiedmethod[dissolvedadsorbableorganicallyboundhalogensaftersolidphaseextractioninwaterswithhighsaltcontent(SPE-AOX)](seeAnnexA).However,resultsobtainedbythismodifiedmethodcandiffersignificantlyfromthoseoftherequiredmethod.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_50
【页数】:21P;A4
【正文语种】:英语