DIN EN 28839-1991 紧固件的机械性能.有色金属制造的螺栓、螺钉、螺柱和螺母
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【英文标准名称】:Mechanicalpropertiesoffasteners;nonferrousmetalbolts,screws,studsandnuts(ISO8839:1986);germanversionEN28839:1991
【原文标准名称】:紧固件的机械性能.有色金属制造的螺栓、螺钉、螺柱和螺母
【标准号】:DINEN28839-1991
【标准状态】:现行
【国别】:德国
【发布日期】:1991-12
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:螺栓;螺柱;断裂荷载;螺钉;特性;材料;名称与符号;米制螺纹;机械性能;螺母;试验;有色金属;紧固件
【英文主题词】:Bolts;Breakingload;Designations;Fasteners;Marking;Materials;Mechanicalproperties;Metricscrewthreads;Non-ferrousmetals;Nuts;Products;Properties;Screws(bolts);Specifications;Studs;Studs(fasteners);Testing;Tests
【摘要】:Thisstandardspecifiesforbolts,screws,studsandnutsofnon-ferrousmetalthedesignationsystem,materials,mechanicalpropertiesincludingtestmethodsandmarking.
【中国标准分类号】:J13
【国际标准分类号】:21_060_10;21_060_20
【页数】:8P.;A4
【正文语种】:德语
【英文标准名称】:Ventilationandairconditioning;technicalhealthrequirements(VDIventilationrules)
【原文标准名称】:房间通风技术.卫生要求(VDI通风规则)
【标准号】:DIN1946T.2-1994
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:
【国际标准分类号】:
【页数】:
【正文语种】:
【英文标准名称】:Advancedtechnicalceramics-Monolithicceramics-Generalandtexturalproperties-Determinationofphasevolumefractionbyevaluationofmicrographs
【原文标准名称】:高技术陶瓷.整体陶瓷.一般的和表面结构特性.通过显微摄影图评估测定相体积分数
【标准号】:BSDDENV623-5-2002
【标准状态】:现行
【国别】:英国
【发布日期】:2002-08-05
【实施或试行日期】:2002-08-05
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:粒径分析;组织;试验设备;缩微照相;试样制备;高级工业陶瓷;陶瓷;粒度;蒸馏物;试验;质量;仪器;显微摄影;特性;定义;结构;单片材料;测定;数学计算
【英文主题词】:
【摘要】:ThisEuropeanPrestandardspecifiesamanualmethodofmakingmeasurementsforthedeterminationofvolumefractionofmajorphasesinadvancedtechnicalceramicsusingmicrographsofpolishedandetchedsections,overlayingasquaregridoflines,andcountingthenumberofintersectionslyingovereachphase.NOTE1Thismethodassumesthatthetruephasevolumefractionsareequivalenttoareafractionsonarandomlycutcrosssectionaccordingtostereologicalprinciples.NOTE2GuidelinesforpolishingandetchingofadvancedtechnicalceramicscanbefoundinannexesAandB.Themethodappliestoceramicswithoneormoredistinctsecondaryphases,suchasfoundinAl2O3/ZrO2,Si/SiC,orAl2O3/SiCw.Ifthetestmaterialcontainsdiscretepores,thesecanbetreatedasasecondaryphaseforthepurposeofthismethodprovidedthatthereisnoevidenceofgrainpluck-outduringpolishingbeingconfusedwithgenuinepores.NOTE3Ifthematerialcontainsmorethanabout20%porositythereisastrongriskthatthemicrostructurewillbedamagedduringthepolishingprocess,andmeasurementofvolumefractionofporesmaybecomemisleading.Secondaryphasevolumefractionsorporositypresentatlevelsoflessthan0,05aresubjecttoconsiderableerrorandpotentialscatterinresults.Alargernumberofmicrographsthantheminimumofthreeisnormallyneededtoimprovetheconsistencyandaccuracyoftheresults.NOTE4Manyceramicscontainsmallamountsofsecondaryglassyphases.Inordertomakeareasonableestimateofglassyphasecontent,theglassmaterialbetweencrystallinegrainsshouldbereadilyobservable,andthusshouldbeatleast0,5μminwidth.ThemethodinthisPrestandardisnotconsideredappropriatefornarrowglassyfilmsaroundgrains.Thismethodassumesthattheselectedregionsofapreparedcross-sectionarestatisticallyrepresentativeofthewholesampledsection.NOTE5Microstructuresareseldomhomogeneous,andthephasecontentscanvaryfrommicrographtomicrograph.Itisessentialtosurveyasufficientlywideareaofthepreparedsectiontoensurethatthoseareasselectedforevaluationarerepresentative,anddonotcontainingeye-catchingirregularities.SomeusersofthisPrestandardcanwishtoapplyautomaticorsemiautomaticimageanalysistomicrographsordirectlycapturedmicrostructuralimages.ThisiscurrentlyoutsidethescopeofthisPrestandard,butsomeguidelinesaregiveninannexC.
【中国标准分类号】:Q32
【国际标准分类号】:81_060_30
【页数】:22P;A4
【正文语种】:英语
