ISO 148-2-1998 金属材料夏比摆式冲击试验第2部分:试验机的验证

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【英文标准名称】:Metallicmaterials-Charpypendulumimpacttest-Part2:Verificationoftestmachines
【原文标准名称】:金属材料夏比摆式冲击试验第2部分:试验机的验证
【标准号】:ISO148-2-1998
【标准状态】:作废
【国别】:国际
【发布日期】:1998-12
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC164
【标准类型】:()
【标准水平】:()
【中文主题词】:摆式冲击试验;切口试棒冲击弯曲试验;金属材料;却贝(摆式冲击试验);定义;钢;试验设备;材料试验;符号;冲击试验;冲击试验;试样;机械试验;摆式冲击试验机;装配;材料试验机
【英文主题词】:Bendtesting;Characterisations;Charpy;Charpyimpacttests;Definition;Definitions;Impacttesting;Impacttestingmachines;Impacttests;Installation;Materialtestingmachines;Materialtests;Materials;Materialstesting;Mechanicaltesting;Metallic;Metallicmaterials;Metals;Notched-barimpactbendingtests;Pendulumimpacttester;Pendulumimpacttestingmachines;Preparation;Referencedevices;Referencematerials;Referencemethods;Steels;Symbols;Testequipment;Testspecimens;Testing;Verification
【摘要】:ThispartofISO148coverstheverificationoftheconstructionalelementsofpendulum-typeimpacttestingmachines.Itisapplicabletomachineswith2mmorwith8mmstrikersusedforpendulumimpacttestscarriedout,forinstance,inaccordancewithISO148-1.Itcananalogouslybeappliedtopendulumimpacttestingmachinesofothercapacitiesandofdifferentdesign.Impactmachinesusedforindustrial,generalorresearchlaboratorytestingofmetallicmaterialsinaccordancewiththispartofISO148arereferredtoasindustrialmachines.Thosewithmorestringentrequirementsarereferredtoasreferencemachines.SpecificationsfortheverificationofreferencemachinesarefoundinISO148-3.ThispartofISO148describestwomethodsofverification.a)ThedirectmethodwhichisstaticinnatureandinvolvesmeasurementofthecriticalpartsofthemachinetoensurethatitmeetstherequirementsofthispartofISO148.TheverificationequipmentshallhaveacertifiedtraceabilitytotheInternationalUnitSystem.Thedirectmethodshallbeusedwhenamachineisbeinginstalledorrepaired,oriftheindirectmethodgivesanincorrectresult.b)Theindirectmethod,whichisdynamicinnature,andwhichusereferencetestpiecestoverifypointsonthemeasuringscale.ApendulumimpacttestingmachineisnotincompliancewiththispartofISO148untilithasbeenverifiedbyboththedirectandindirectmethods(seeclause12).TherequirementsforthereferencetestpiecesarefoundinISO148-3.NOTE—ThispartofISO148takesintoaccountthetotalenergyabsorbedinfracturingthetestpieceusinganindirectmethod.Thistotalabsorbedenergyconsistsof1)theenergyneededtobreakthetestpieceitselfand2)theinternalenergylossesofthependulumimpacttestingmachineperformingthefirsthalf-cycleswingfromtheinitialposition.Internalenergylossesaredueto:a)Airresistance,frictionofthebearingsoftherotationaxisandtheindicatingpointerofthependulumwhichcanbedeterminedbythedirectmethod(see9.4).b)Shockofthefoundation,vibrationoftheframeandpendulumforwhichnosuitablemeasuringmethodsandapparatushavebeendeveloped.
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:18P;A4
【正文语种】:英语