基本信息
| 标准名称： | 萘不挥发物的测定方法 |
| 英文名称： | Method for the determination of the non-volatile matter of naphthalene |
| 中标分类： |
化工 >>
有机化工原料 >>
基本有机化工原料 |
| ICS分类： |
化工技术 >>
有机化学
|
| 替代情况： | 被GB/T 6701-2005代替 |
| 发布日期： | 1986-08-01 |
| 实施日期： | 1987-08-01 |
| 首发日期： | 1986-08-13 |
| 作废日期： | 2005-10-01 |
| 归口单位： | 中国钢铁工业协会 |
| 起草单位： | 鞍钢 |
| 出版日期： | 1900-01-01 |
| 页数： | 0 |
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： 化工 有机化工原料 基本有机化工原料 化工技术 有机化学
【英文标准名称】:StandardTestMethodforDeterminingDecarburizationandCarburizationinHardenedandTemperedThreadedSteelBolts,ScrewsandStuds
【原文标准名称】:淬火和回火的螺纹钢螺栓、螺母和螺柱的脱碳和渗碳性测定的标准试验方法
【标准号】:ASTMF2328-2005
【标准状态】:现行
【国别】:
【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(US-ASTM)
【起草单位】:F16.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:螺柱;脱碳;测定;回火;螺纹;淬火的;螺钉;渗碳;钢
【英文主题词】:carburization;completedecarburization;decarburization;grossdecarburization;HK;HV;Knoop;microindentation;partialdecarburization;temperedmartensite;Vickers
【摘要】:Decarburizationandcarburizationaretwosurfaceconditionscreated,eitherintentionallyorunintentionally,aswithapre-existingconditioncreatedduringtherodrollingprocess,therod/wireannealingprocess,orwhileheattreatingthreadedsteelproducts.Toomuchofeitherwilladverselyaffectthesafetyandperformanceofthethreadedproduct.Therefore,limitshavebeenestablishedforthreedifferentproductgroups:theharderandgreaterthetensilestrengthoftheproduct,themoresusceptibletofailuretheproductbecomesiftheselimitsareexceeded.Whentestingtoaparticularproductspecificationthatliststhedimensionsandmicroindentationdatatobeused,thatdatashalltakeprecedenceoverthetablesinthistestmethod.Thereareonlytwoviablemethodsavailabletodetectthesedeficiencies,eitherbythevisualmethodorthemicroindentationmethod.Bothmethodsareusedforroutineinspectionswhenevaluationsareconductedatasinglelocationontheproductsample.4.3.1Becauseanevaluationataspecificlocationmaynotberepresentativeofthewholepart,therefereemethodemploysthemicroindentationmethodtakenasanaverageofevaluationsconductedonfouradjacentthreads.Thisproceduresignificantlyreducestherandomtestvariableswhencomparedtotestingonasinglethread.Specifyingthistestmethoddoesnotspecifyorimplythattestingshallbeforeitherdecarburizationorcarburizationaloneorforbothconditions.Wheneithertestmethodisperformed,bothconditionswillbeapparentandshallbereported.Forexample,ifanorderisplacedtotestfordecarburizationandnoneisfound,butthepresenceofcarburizationisdetected,itshallbereportedonthetestreportthatcarburizationwasfound.1.1Thistestmethodcoversproceduresformeasuring,classifying,anddeterminingthepresenceofdecarburizationandcarburizationinthethreadedsectionofhardenedandtemperedinchseriessteelbolts,screws,studs,andsimilarpartswhichhavebeenheatedtofacilitatefabricationortomodifyitsmechanicalproperties.Thistestmethodisnotintendedtoaddressproductswhichareintentionallycarburizedtoachievespecificresults.1.2Tworoutinemethodsaredescribedformeasuringthelimitsofanddeterminingthepresenceofdecarburizationorcarburization-theopticalmethodandthemicroindentationmethod1.Eithermethodisappropriateforroutineexaminations.Themicroindentationmethod2shallbeconsideredtherefereemethod.1.3Forthepurposeofthesetests,therearethreeclassesofhardenedandtemperedsteelproductsforwhichspecificmeasurementsmustbemadewithrespecttotheirphysicalproperties.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:J13
【国际标准分类号】:21_060_01;77_140_20
【页数】:4P.;A4
【正文语种】: