【英文标准名称】:StandardPracticeforSteelCastings,Stainless,InstrumentCalibration,forEstimatingFerriteContent
【原文标准名称】:估算铁素体含量用仪器校准不锈钢铸件标准规程
【标准号】:ASTMA799/A799M-2010
【标准状态】:现行
【国别】:
【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】:A01.18
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:校正;铁酸盐;不锈钢铸件;金属/合金分析仪器校准;铁素体含量;铁铬铸件;奥氏体不锈钢铸件规范;微观结构;钢铁外观检查
【英文主题词】:calibration;ferrite;stainlesssteelcastings;Calibration--metals/alloysanalysisinstrumentation;Ferritecontent;Iron-chromiumcastings;Austeniticstainlesssteelcastings--specifications;Microstructures;Stainlesssteelcastings;Visualexaminatio
【摘要】:Theamountofferritepresentinanausteniticstainlesssteelhasbeenshowntoinfluencethestrength,toughnessandcorrosionresistanceofthistypeofcastalloy.Theamountofferritepresenttendstocorrelatewellwiththemagneticpermeabilityofthesteel.Themethodsdescribedinthisstandardcovercalibrationpracticeforestimatingferritebythemagneticpermeabilityofthesteel.Thepracticeisinexpensivetouseoverlargeareasofthecastpartandisnon-destructive.Thispracticehasbeenusedforresearch,alloydevelopment,qualitycontrol,andmanufacturingcontrol.Manyinstrumentsareavailablehavingdifferentdesigns,anddifferentprinciplesofoperation.Whentheprobeisplacedonthematerialbeinginvestigated,aclosedmagneticcircuitisformedallowingmeasurementofthemagneticpermeability.Whencalibratedwithstandardshavingknownferritecontent,thispermeabilityindicatestheferritecontentofthematerialbeinganalyzed.Theestimatedferritecontentisreadfromacalibrateddialorfromadigital-readoutdial.Followthemanufacturer''sinstructionsforpropercalibrationoftheinstrument.Sincethispracticemeasuresmagneticattractionandnotferritedirectly,itissubjecttoallofthevariablesthataffectmagneticpermeability,suchastheshape,size,orientation,andcompositionoftheferritephase.Theseinturnareaffectedbythermalhistory.Ferritemeasurementsbymagneticmethodshavealsobeenfoundtobeaffectedbythesurfacefinishofthematerialbeinganalyzed.Magneticmethodsshouldnotbeusedforarbitrationofconflictsonferritecontentexceptwhenagreeduponbetweenmanufacturerandpurchaser.1.1Thispracticecoverstheprocedureforcalibrationofinstrumentstobeusedforestimatingtheferritecontentofthemicrostructureofcaststainlesssteelsbymagneticresponseormeasurementofpermeability.Thisprocedurecoversbothprimaryandsecondaryinstruments.1.1.1AprimaryinstrumentisonethathasbeencalibratedusingNationalInstituteofStandardsandTechnology-StandardReferenceMaterial(NIST-SRM)thicknesscoatingstandards.Itisalaboratorytooltobeusedwithtestspecimens.Someprimaryinstrumentsmaybeusedtodirectlymeasuretheferritecontentofcastings.1.1.2Asecondaryinstrumentisonethathasbeencalibratedbytheuseofsecondarystandardsthathavebeenmeasuredbyacalibratedprimaryinstrument.Secondaryinstrumentsaretobeusedtodirectlymeasuretheferritecontentofcastings.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.2.1Withinthetext,theSIunitsareshowninbrackets.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H40
【国际标准分类号】:77_140_80
【页数】:4P.;A4
【正文语种】:


【英文标准名称】:Dependabilitymanagement-Part3:Applicationguide-Section4:Guidetothespecificationofdependabilityrequirements
【原文标准名称】:可信性管理第3部分:应用指南第4节:可信性要求规定指南
【标准号】:IEC60300-3-4-1996
【标准状态】:作废
【国别】:国际
【发布日期】:1996-08
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/TC56
【标准类型】:()
【标准水平】:()
【中文主题词】:质量保证;可靠度;可靠性相关程序;可靠性管理;危险分析;电气工程
【英文主题词】:Availability;Characteristics;Components;Definition;Definitions;Doffingcylinders;Electricalengineering;Electronicengineering;Electronicequipmentandcomponents;Failurerates;Functions;Guidebooks;Inspection;Maintainability;Maintenance;Operatability;Productspecifications;Qualitative;Qualityassurance;Qualityrequirements;Quantitative;Reabilityrelatedprogram;Reliability;Reliabilityanalysis;Reliabilityimprovement;Reliabilitymanagement;Requirement;Riskanalysis;Sellers;Specification;Specifications;Testing;Verification
【摘要】:Givesguidanceonspecifyingrequireddependabilitycharacteristicsinproductandequipmentspecifications,togetherwithspecificationsofproceduresandcriteriaforverification.
【中国标准分类号】:L05
【国际标准分类号】:29_020;31_020;33_020;35_020
【页数】:35P.;A4
【正文语种】:英语