NF A35-552-2-1997 淬火钢和回火钢.第2部分:非合金优质钢的交货技术条件
时间:2024-05-14 12:38:21 来源: 标准资料网 作者：标准资料网 阅读：8593
【英文标准名称】:Quenchedandtemperedsteels.Part2:technicaldeliveryconditionsforunaloyedqualitysteels.
【原文标准名称】:淬火钢和回火钢.第2部分:非合金优质钢的交货技术条件
【标准号】:NFA35-552-2-1997
【标准状态】:作废
【国别】:法国
【发布日期】:1997-02-01
【实施或试行日期】:1997-02-20
【发布单位】:法国标准化协会(AFNOR)
【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】:H40
【国际标准分类号】:77_140_10
【页数】:28P;A4
【正文语种】:其他
【英文标准名称】:Vibration;kinematicdefinitions
【原文标准名称】:振动学.运动学概念
【标准号】:DIN1311-1-1974
【标准状态】:作废
【国别】:德国
【发布日期】:1974-02
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:复杂;角;摇杆;定义;振动;振荡器;相位移;频率;运动学;动量;分析;连续的
【英文主题词】:definitions;vibrations;complex;rockers;phaseshift;frequencies;kinematics;continuous;momentum;oscillators;analysis;angles(geometry)
【摘要】:
【中国标准分类号】:A42
【国际标准分类号】:17_160;01_040_17
【页数】:5P;A4
【正文语种】:德语
【英文标准名称】:StandardPracticeforMeasuringSiftingSegregationTendenciesofBulkSolids
【原文标准名称】:测定大块固体的筛分分离趋势的标准实施规程
【标准号】:ASTMD6940-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D18.24
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:bulksolids;segregation;sifting;Segregation;Bulksolids;Horizontaltesting;Siftingsegregation
【摘要】:Siftingsegregationcancausehorizontalsegregation(forexample,center-to-periphery)withinbinsusedtoholdandtransportbulksolids.Thiscanaffectfinalproductqualityinindustrialapplications.Bymeasuringabulksolid''ssegregationtendency,onecancompareresultstootherbulksolidswithknownhistory,ordetermineifthegivenbulksolidmayhaveatendencytosegregateinagivenprocess.Sifting,whichisaprocessbywhichsmallerparticlesmovethroughamatrixoflargerones,isacommonmethodofsegregation.Fourconditionsmustexistforsiftingtooccur:ADifferenceinParticleSizebetweentheIndividualComponents8212;Thisratiocanbeaslowas1.3to1.Ingeneral,thelargertheratioofparticlesizes,thegreaterthetendencyforparticlestosegregatebysifting.ASufficientlyLargeMeanParticleSize8212;Siftingsegregationcanoccurwithameanparticlesizeinthe50x03BC;mrangeandcanbecomeadominantsegregationmechanismifthemeanparticlesizeisabove100x03BC;m.SufficientlyFreeFlowingMaterial8212;Thisallowsthesmallerparticlestosiftthroughthematrixoflargerparticles.Withcohesivematerials,thefineparticlesareboundtooneanotheranddonotenterthevoidsamongthecoarseparticles.InterparticleMotion8212;Thiscanbecausedduringformationofapile,byvibration,orbyavelocitygradientacrosstheflowingmaterial.Allfouroftheseconditionsmustexistforsiftingsegregationtooccur.Ifanyoneoftheseconditionsdoesnotexist,thematerialwillnotsegregatebythismechanism.Note18212;Thequalityoftheresultproducedbythispracticeisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthispracticearecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.PracticeD3740wasdevelopedforagenciesengagedinthetestingand/orinspectionofsoilandrock.Assuchitisnottotallyapplicabletoagenciesperformingthispractice.However,usersofthispracticeshouldrecognizethattheframeworkofPracticeD3740isappropriateforevaluatingthequalityofanagencyperformingthispractice.Currentlythereisnoknownqualifyingnationalauthoritythatinspectsagenciesthatperformthispractice.1.1Thispracticecoversanapparatusandprocedureforsimulatingthesegregationtendenciesofbulksolidsbymeansofthesiftingmechanism.1.2Temperature-andhumidity-sensitivebulksolidsmayneedtobetestedatdifferenttemperaturesandmoisturecontents,aswouldhappeninanindustrialenvironment.1.3Themaximumparticlesizeshouldbelimitedto3mm,toreducethelikelihoodofbindingtheslidegate.1.4Thisstandardisnotapplicableto......
【中国标准分类号】:A42
【国际标准分类号】:19_120
【页数】:5P.;A4
【正文语种】:英语