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【英文标准名称】:StandardTestMethodforHardnessTestingofCementedCarbides
【原文标准名称】:烧结碳化物硬度试验的标准试验方法
【标准号】:ASTMB294-2010
【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】:B09.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:cementedcarbides;hardness;indenters;Rockwellhardnesstest;ScaleHRA;testblocks;Rockwellhardness;Hardness(indentation);Cementedcarbides
【摘要】:Rockwellhardnesstestingisoneofthemoreimportantmethodsusedtoevaluatecementedcarbides.Forcompositionalgroupsofcementedcarbides,hardnessisanindicationofwearresistanceandtoughness.Lowerhardnessgradesusuallyindicatelesswearresistancebutgreatertoughness.Foraspecificgradeofcementedcarbide,hardnessisanindicationofthemetallurgicalqualityofthematerial.InnocaseisRockwellhardnesstestingtheonlytestmethodtobeconsideredinevaluatingcementedcarbides.1.1ThistestmethodcoversthehardnesstestingofcementedcarbidesbyuseofaRockwellhardnesstesterperformingtestsintheRockwellHRAscale(regularscale,diamondindenter,10kgf(98.07N)preliminarytestforce,and60kgf(588.4N)load)intherangeofRockwell80HRAandabove.Alsocoveredaretheproceduresforthetestingandselectionofdiamondindenters,themanagementandtraceabilityofthefourlevelsofstandardizedtestblocks,andthemakingandcalibrationofPrimary,Secondary,andWorkingstandardizedtestblocks.1.2TheRockwellhardnesstesterisaconvenientandreliablemeansofmeasuringthehardnessofcementedcarbides.Ahardnessvalueisobtainedeasily,butitissubjecttoconsiderableerrorunlesscertainprecautionsareobserved.1.3ThelatestversionofTestMethodsE18shallbefollowedexceptwhereotherwiseindicatedinthistestmethod.1.4ThevaluesstatedinSIunitsaretoberegardedasstandardexceptthatforceandlengthvaluesassociatedwiththeRockwellhardnesstesterswillcomplywithE18withforcevaluesspecifiedasN(kgf)andindenterlengthvaluesspecifiedasmm.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H16
【国际标准分类号】:77_040_10
【页数】:8P.;A4
【正文语种】:英语