ASME B18.2.3.9M-1984 米制六角头法兰螺钉
作者:标准资料网 时间:2024-05-17 20:56:03 浏览:9323
来源:标准资料网
【英文标准名称】:Metricheavyhexflangescrews
【原文标准名称】:米制六角头法兰螺钉
【标准号】:ASMEB18.2.3.9M-1984
【标准状态】:作废
【国别】:美国
【发布日期】:1984
【实施或试行日期】:
【发布单位】:美国机械工程师协会(ASME)
【起草单位】:ASME
【标准类型】:()
【标准水平】:()
【中文主题词】:公差;机械性能;米制的;法兰螺钉;螺钉;尺寸;锁定装置及定位装置;六角头螺钉
【英文主题词】:flangescrew;screws(bolts);hexagonheadscrews;dimensions;lockingandlocatingdevices;tolerances(measurement);metric;mechanicalproperties
【摘要】:
【中国标准分类号】:J13
【国际标准分类号】:21_060_10
【页数】:15P;A4
【正文语种】:英语
基本信息
| 标准名称： | 外球面球轴承和偏心套 外形尺寸 |
| 中标分类： |
机械 >>
通用零部件 >>
滚动轴承 |
| 替代情况： | 被GB/T 3882-1995代替 |
| 发布日期： | |
| 实施日期： | 1984-10-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
适用范围
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前言
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目录
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引用标准
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所属分类： 机械 通用零部件 滚动轴承
【英文标准名称】:StandardTestMethodforAirOxidationofCarbonandGraphiteintheKineticRegime
【原文标准名称】:标准测试空气中的碳和石墨氧化法在动力学制度
【标准号】:ASTMD7542-2009
【标准状态】:现行
【国别】:
【发布日期】:2009
【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】:D02.F0
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:活化能
【英文主题词】:activationenergy;air;carbon;graphite;kineticregime;oxidationrate;pre-exponentialfactor;standardoxidationtemperature;temperature
【摘要】:Thistestmethodcanbeusedtomeasuretherateofoxidationforvariousgradesofmanufacturedcarbonandgraphiteinstandardconditions,andcanbeusedforqualitycontrolpurposes.Thistestmethodalsoprovideskineticparameters(activationenergyandlogarithmofpre-exponentialfactor)fortheoxidationreaction,andastandardoxidationtemperature.Theresultsuniquelycharacterizetheeffectoftemperatureonoxidationratesinair,andtheoxidationresistanceofmachinedcarbonorgraphitespecimenswithstandardsizeandshape,inthekinetic,orchemicallycontrolled,oxidationregime.Thisinformationisusefulfordiscriminationbetweenmaterialgradeswithdifferentimpuritylevels,grainsize,porestructure,degreeofgraphitization,orantioxidationtreatments,oracombinationthereof.5.3Accuratelydeterminedkineticparameters,likeactivationenergyandlogarithmofpre-exponentialfactor,canbeusedforpredictionofoxidationratesinairasafunctionoftemperatureinconditionssimilartothoseofthistestmethod.However,extrapolationofsuchpredictionsoutsidethetemperaturerangewhereArrheniusplotsarelinear(outsidethekineticorchemicallycontrolledregimeofoxidation)shouldbemadewithcaution.Inconditionswhereoxidationratesbecomecontrolledbyamechanismotherthanchemicalreactions,suchasin-porediffusionorboundarytransportoftheoxidantgas,predictionofoxidationratesusingkineticparametersdeterminedwiththistestmethodmayproduceoverestimatedresults.1.1Thistestmethodcoverstherateofoxidativeweightlossperexposednominalgeometricsurfacearea,orperinitialweightofmachinedtestspecimensofstandardsizeandshape,orboth.Thetestisvalidinthetemperaturerangewheretherateofairoxidationofgraphiteandmanufacturedcarbonislimitedbyreactionkinetics.1.2Thistestmethodalsoprovidesastandardoxidationtemperature(asdefinedin3.1.7),andthekineticparametersoftheoxidationreaction,namelytheactivationenergyandthelogarithmofpre-exponentialfactorinArrheniusequation.ThekineticparametersofArrheniusequationarecalculatedfromthetemperaturedependenceofoxidationratesmeasuredoverthetemperaturerangewhereArrheniusplots(asdefinedin3.1.8)arelinear,whichisdefinedasthex201C;kineticx201D;orx201C;chemicalcontrolx201D;oxidationregime.Fortypicalnucleargradegraphitematerialsitwasfoundthatthepracticalrangeoftestingtemperaturesisfromabout500x2013;550x00B0;Cuptoabout700x2013;750x00B0;C.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:71_060_10
【页数】:12P.;A4
【正文语种】:
