ISO 492-1994 滚动轴承.径向轴承.公差
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来源:标准资料网
【英文标准名称】:Rollingbearings-Radialbearings-Tolerances
【原文标准名称】:滚动轴承.径向轴承.公差
【标准号】:ISO492-1994
【标准状态】:作废
【国别】:国际
【发布日期】:1994-12
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC4
【标准类型】:()
【标准水平】:()
【中文主题词】:径向轴承;公差;尺寸;滚动轴承;尺寸公差;轴承
【英文主题词】:bearings;dimensions;dimensionaltolerances;rollingbearings;radialbearings;tolerances(measurement)
【摘要】:
【中国标准分类号】:J11
【国际标准分类号】:21_100_20
【页数】:19P;A4
【正文语种】:英语
【英文标准名称】:StandardSpecificationforGeocompositesforPavementEdgeDrainsandOtherHigh-FlowApplications
【原文标准名称】:铺筑材料边缘排水管和其它高流动性设备用土工复合材料的标准规范
【标准号】:ASTMD7001-2005
【标准状态】:作废
【国别】:美国
【发布日期】:2005
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:排水管;流动;复合材料;边;路面;土工织物
【英文主题词】:Compositematerials;Drains;Edge;Flow;Geotextiles;Pavement
【摘要】:
【中国标准分类号】:W59
【国际标准分类号】:59_080_70
【页数】:4P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforScratchHardnessofMaterialsUsingaDiamondStylus
【原文标准名称】:用金刚石触针测定材料划痕硬度的标准试验方法
【标准号】:ASTMG171-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【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】:G02.30
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:scratch;scratchhardness;single-pointabrasion;stylus
【摘要】:Thistestmethodisintendedtomeasuretheresistanceofsolidsurfacestopermanentdeformationundertheactionofasinglepoint(stylustip).Itisacompanionmethodtoquasi-statichardnesstestsinwhichastylusispressedintoasurfaceunderacertainnormalloadandtheresultantdepthorimpressionsizeisusedtocomputeahardnessnumber.Scratchhardnessnumbers,unlikequasi-statichardnessnumbers,involveadifferentcombinationofpropertiesofthesurfacebecausetheindenter,inthiscaseadiamondstylus,movestangentiallyalongthesurface.Therefore,thestressstateunderthescratchingstylusdiffersfromthatproducedunderaquasi-staticindenter.Scratchhardnessnumbersareinprincipleamoreappropriatemeasureofthedamageresistanceofamaterialtosurfacedamageprocessesliketwo-bodyabrasionthanarequasi-statichardnessnumbers.Thistestmethodisapplicabletoawiderangeofmaterials.Theseincludemetals,alloys,andsomepolymers.Themaincriteriaarethatthescratchingprocessproducesameasurablescratchinthesurfacebeingtestedwithoutcausingcatastrophicfracture,spallation,orextensivedelaminationofsurfacematerial.Severedamagetothetestsurface,suchthatthescratchwidthisnotclearlyidentifiableorthattheedgesofthescratcharechippedordistorted,invalidatestheuseofthistestmethodtodetermineascratchhardnessnumber.Sincethedegreeandtypeofsurfacedamageinamaterialmayvarywithappliedload,theapplicabilityofthistesttocertainclassesofmaterialsmaybelimitedbythemaximumloadatwhichvalidscratchwidthmeasurementscanbemade.Theresistanceofamaterialtoabrasionbyasinglepointmaybeaffectedbyitssensitivitytothestrainrateofthedeformationprocess.Therefore,thistestisconductedunderlowstylustraversingspeeds.Useofaslowscratchingspeedalsominimizesthepossibleeffectsoffrictionalheating.Thistestusesmeasurementsoftheresidualscratchwidthafterthestylushasbeenremovedtocomputethescratchhardnessnumber.Therefore,itreflectsthepermanentdeformationresultingfromscratchingandnottheinstantaneousstateofcombinedelasticandplasticdeformationofthesurface.1.1Thisstandarddescribeslaboratoryproceduresfordeterminingthescratchhardnessofthesurfacesofsolidmaterials.Withincertainlimitations,asdescribedinthisguide,thistestmethodisapplicabletometals,ceramics,polymers,andcoatedsurfaces.Thescratchhardnesstest,asdescribedherein,isnotintendedtobeusedasameanstodeterminecoatingadhesion,norisitintendedforusewithotherthanspecifichemispherically-tipped,conicalstyli.1.2Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H22
【国际标准分类号】:17_040_20
【页数】:7P.;A4
【正文语种】:
