GB/T 20167-2012 稀土抛光粉物理性能测试方法 抛蚀量和划痕的测定 重量法
作者:标准资料网 时间:2024-05-21 06:10:46 浏览:8482
来源:标准资料网
基本信息
| 标准名称： | 稀土抛光粉物理性能测试方法 抛蚀量和划痕的测定 重量法 |
| 英文名称： | Physical test method of rare earth polishing powder - Determination of burnishing mass and scratch - Gravimetry |
| 中标分类： |
冶金 >>
有色金属及其合金产品 >>
稀有金属及其合金 |
| 替代情况： | 替代GB/T 20167-2006 |
| 发布部门： | 中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会 |
| 发布日期： | 2012-11-05 |
| 实施日期： | 2013-05-01 |
| 首发日期： | 2006-04-13 |
| 作废日期： | |
| 主管部门： | 国家标准化管理委员会 |
| 归口单位： | 全国稀土标准化技术委员会 |
| 起草单位： | 包头天骄清美稀土抛光粉有限公司、包头稀土研究院、甘肃稀土新材料股份有限公司 |
| 出版社： | 中国标准出版社 |
| 出版日期： | 2013-05-01 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类： 冶金 有色金属及其合金产品 稀有金属及其合金
【英文标准名称】:StandardTestMethodforStaticandKineticCoefficientsofFrictionofPlasticFilmandSheeting
【原文标准名称】:测定塑料薄膜和薄板静摩擦和动摩擦系数的标准试验方法
【标准号】:ASTMD1894-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D20.19
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:friction;kineticcoefficientoffriction;plasticfilm;plasticsheeting;slip;staticcoefficientoffriction;Coefficientoffriction(COF)--plastics;Kineticfrictionanalysis;Plasticsheetandfilm;Staticcoefficientoffriction;Statictests--plas
【摘要】:Measurementsoffrictionalpropertiesmaybemadeonafilmorsheetingspecimenwhenslidingoveritselforoveranothersubstance.Thecoefficientsoffrictionarerelatedtotheslippropertiesofplasticfilmsthatareofwideinterestinpackagingapplications.Thesemethodsyieldempiricaldataforcontrolpurposesinfilmproduction.Correlationoftestresultswithactualperformancecanusuallybeestablished.Thistestmethodincludestestingattemperaturesotherthan23x00B0;Cbyheatingonlytheplanewhilethesledisatambienttemperature.Slippropertiesaregeneratedbyadditivesinsomeplasticfilms,forexample,polyethylene.Theseadditiveshavevaryingdegreesofcompatibilitywiththefilmmatrix.Someofthembloom,orexudetothesurface,lubricatingitandmakingitmoreslippery.Becausethisbloomingactionmaynotalwaysbeuniformonallareasofthefilmsurface,valuesfromthesetestsmaybelimitedinreproducibility.Thefrictionalpropertiesofplasticfilmandsheetingmaybedependentontheuniformityoftherateofmotionbetweenthetwosurfaces.Careshouldbeexercisedtoensurethattherateofmotionoftheequipmentisascarefullycontrolledaspossible.Dataobtainedbytheseproceduresmaybeextremelysensitivetotheageofthefilmorsheetandtheconditionofthesurfaces.Thebloomingactionofmanyslipadditivesistime-dependent.Forthisreason,itissometimesmeaninglesstocompareslipandfrictionpropertiesoffilmsorsheetsproducedatdifferenttimes,unlessitisdesiredtostudythiseffect.Frictionalandslippropertiesofplasticfilmandsheetingarebasedonmeasurementsofsurfacephenomena.Whereproductshavebeenmadebydifferentprocesses,orevenondifferentmachinesbythesameprocess,theirsurfacesmaybedependentontheequipmentoritsrunningconditions.Suchfactorsmustbeweighedinevaluatingdatafromthesemethods.Themeasurementofthestaticcoefficientoffrictionishighlydependentontherateofloadingandontheamountofblockingoccurringbetweentheloadedsledandtheplatformduetovariationintimebeforemotionisinitiated.Careshouldbeexercisedtomakecertainthatthespeedofresponseoftherecorder,eitherelectronicormechanical,isnotexceeded.Formanymaterials,theremaybeaspecificationthatrequirestheuseofthistestmethod,butwithsomeproceduralmodificationsthattakeprecedencewhenadheringtothespecification.Therefore,itisadvisabletorefertothatmaterialspecificationbeforeusingthistestmethod.Table1ofClassificationSystemD4000liststheASTMmaterialsstandardsthatcurrentlyexist.1.1Thistestmethodcoversdeterminationofthecoefficientsofstartingandslidingfrictionofplasticfilmandsheetingwhenslidingoveritselforothersubstancesatspecifiedtestconditions.Theprocedurepermitstheuseofastationarysledwithamovingplane,oramovingsledwithastationaryplane.Bothproceduresyieldthesamecoefficientsoffrictionvaluesforagivensample.Note18212;Forthefrictionalcharacteristicsofplasticfilmspartiallywrappedaroundacylinder,orcapstan,seeTestMethodG143underthejurisdictionofASTMSubcommitteeG02.50.1.2Testdataobtainedbythistestmethodisrelevantandappropriateforuseinengineeringdesign.1.2.1Asanoptiontothistest,coefficientoffrictionmayberunattemperaturesotherthan23x00B0;Cbyheatingonlytheplanewhilethesledisatambienttemperature.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.
