基本信息
| 标准名称： | 模拟实际工作条件下的助听器性能测量方法 |
| 英文名称： | Methods of measurement of performance characteristics of hearing aids under simulated in situ working conditions |
| 中标分类： |
电子元器件与信息技术 >>
电子元件 >>
电声器件 |
| ICS分类： |
计量学和测量、物理现象 >>
声学和声学测量
|
| 发布部门： | 国家技术监督局 |
| 发布日期： | 1989-07-04 |
| 实施日期： | 1990-04-01 |
| 首发日期： | 1989-06-29 |
| 作废日期： | 1900-01-01 |
| 主管部门： | 信息产业部（电子） |
| 归口单位： | 全国电声学标准化技术委员会 |
| 起草单位： | 中国计量科研院 |
| 起草人： | 章句才、帅正萍、沈扬、张勇强 |
| 出版社： | 中国标准出版社 |
| 出版日期： | 1990-04-01 |
| 页数： | 平装16开， 页数：10， 字数：20000 |
适用范围
本标准适用于测量助听器的性能。
前言
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目录
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引用标准
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所属分类： 电子元器件与信息技术 电子元件 电声器件 计量学和测量 物理现象 声学和声学测量
【英文标准名称】:StandardHardnessConversionTablesforMetalsRelationshipAmongBrinellHardness,VickersHardness,RockwellHardness,SuperficialHardness,KnoopHardness,andScleroscopeHardness
【原文标准名称】:布氏硬度、维氏硬度、洛氏硬度、洛氏表面硬度和努氏硬金属用标准硬度换算表
【标准号】:ASTME140-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:E28.06
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:布氏硬度;换算表;硬度;硬度测量;努氏硬度;机械试验;金属;洛氏硬度;试验
【英文主题词】:conversion;hardnessscale;metallic
【摘要】:1.1ConversionTable1presentsdataintheRockwellChardnessrangeontherelationshipamongBrinellhardness,Vickershardness,Rockwellhardness,Rockwellsuperficialhardness,Knoophardness,andScleroscopehardnessofnon-austeniticsteelsincludingcarbon,alloy,andtoolsteelsintheas-forged,annealed,normalized,andquenchedandtemperedconditionsprovidedthattheyarehomogeneous.1.2ConversionTable2presentsdataintheRockwellBhardnessrangeontherelationshipamongBrinellhardness,Vickershardness,Rockwellhardness,Rockwellsuperficialhardness,Knoophardness,andScleroscopehardnessofnon-austeniticsteelsincludingcarbon,alloy,andtoolsteelsintheas-forged,annealed,normalized,andquenchedandtemperedconditionsprovidedthattheyarehomogeneous.1.3ConversionTable3presentsdataontherelationshipamongBrinellhardness,Vickershardness,Rockwellhardness,Rockwellsuperficialhardness,andKnoophardnessofnickelandhigh-nickelalloys(nickelcontentover50%).Thesehardnessconversionrelationshipsareintendedtoapplyparticularlytothefollowing:nickel-aluminum-siliconspecimensfinishedtocommercialmillstandardsforhardnesstesting,coveringtheentirerangeofthesealloysfromtheirannealedtotheirheavilycold-workedorage-hardenedconditions,includingtheirintermediateconditions.1.4ConversionTable4presentsdataontherelationshipamongBrinellhardness,Vickershardness,Rockwellhardness,andRockwellsuperficialhardnessofcartridgebrass.1.5ConversionTable5presentsdataontherelationshipbetweenBrinellhardnessandRockwellBhardnessofausteniticstainlesssteelplateintheannealedcondition.1.6ConversionTable6presentsdataontherelationshipbetweenRockwellhardnessandRockwellsuperficialhardnessofausteniticstainlesssteelsheet.1.7ConversionTable7presentsdataontherelationshipamongBrinellhardness,Vickershardness,Rockwellhardness,Rockwellsuperficialhardness,andKnoophardnessofcopper.1.8ConversionTable8presentsdataontherelationshipamongBrinellhardness,Rockwellhardness,andVickershardnessofalloyedwhiteiron.1.9ConversionTable9presentsdataontherelationshipamongBrinellhardness,Vickershardness,Rockwellhardness,andRockwellsuperficialhardnessofwroughtaluminumproducts.1.10Manyoftheconversionvaluespresentedhereinwereobtainedfromcomputer-generatedcurvesofactualtestdata.MostRockwellhardnessnumbersarepresentedtothenearest0.1or0.5hardnessnumbertopermitaccuratereproductionofthesecurves.Sinceallconvertedhardnessvaluesmustbeconsideredapproximate,however,allconvertedRockwellhardnessnumbersshallberoundedtothenearestwholenumberinaccordancewithPracticeE29.1.11AppendixX1-AppendixX9containequationsdevelopedfromthedatainTable1-9,respectively,toconvertfromonehardnessscaletoanother.Sinceallconvertedhardnessvaluesmustbeconsideredapproximate,however,allconvertedhardnessnumbersshallberoundedinaccordancewithPracticeE29.1.12Conversionofhardnessvaluesshouldbeusedonlywhenitisimpossibletotestthematerialundertheconditionsspecified,andwhenconversionismadeitshouldbedonewithdiscretionandundercontrolledconditions.Eachtypeofhardnesstestissubjecttocertainerrors,butifprecautionsarecarefullyobserved,thereliabilityofhardnessreadingsmadeoninstrumentsoftheindentationtypewillbefoundcomparable.Differencesinsensitivitywithintherangeofagivenhardnessscale(forexample,RockwellB)maybegreaterthanbetweentwodifferentscalesortypesofinstruments.Theconversionvalues,whetherfromthetablesorcalculatedfromtheequations,areonlyapproximateandmaybeinaccurateforspecificapplication.
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:21P.;A4
【正文语种】: