ASTM B294-1992(2006) 硬质合金硬度的测试方法

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【英文标准名称】:StandardTestMethodforHardnessTestingofCementedCarbides
【原文标准名称】:硬质合金硬度的测试方法
【标准号】:ASTMB294-1992(2006)
【标准状态】:现行
【国别】:
【发布日期】:1992
【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】:B09.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;碳化物;碳化物;烧结金属
【英文主题词】:cementedcarbides;hardness;indenters;Rockwellhardnesstest;ScaleA;testblocks
【摘要】:Rockwellhardnessisoneofthemoreimportantpropertiesusedtoevaluatecementedcarbides.Forcompositionalgroupsofcementedcarbides,hardnessisanindicationofwearresistanceandtoughness.Lowerhardnessgradesusuallyindicatelesswearresistancebutgreatertoughness.Foraspecificgradeofcementedcarbide,hardnessisanindicationofthemetallurgicalqualityofthematerial.Innocaseishardnesstheonlypropertytobeconsideredinevaluatingcementedcarbides.1.1ThistestmethodcoversthehardnesstestingofcementedcarbidesbyuseoftheRockwellhardnesstesterwiththeRockwellAscale(diamondindenterand588.4N(60kgf)load)intherangeofRockwellA80andabove.Alsocoveredaretheproceduresforthetestingandselectionofdiamondindenters,themanagementandtraceabilityofthefourlevelsofstandardtestblocks,theacquisitionofsecondarystandardtestblocks,andthemakingandcalibrationofworkingstandardtestblocks.1.2TheRockwellhardnesstesterisaconvenientandreliablemeansofmeasuringthehardnessofcementedcarbides.Ahardnessvalueisobtainedeasily,butitissubjecttoconsiderableerrorunlesscertainprecautionsareobserved.1.3TestMethodsE18shallbefollowedexceptwhereotherwiseindicatedinthistestmethod.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H70
【国际标准分类号】:77_040_10(MECHANICALTESTINGOFMETALS)
【页数】:5P.;A4
【正文语种】: