ASTM B890-2007 用X射线荧光光谱法测定钨合金和钨硬金属的金属成分用标准试验方法

作者:标准资料网 时间:2024-05-08 12:56:50  浏览:8700   来源:标准资料网

【英文标准名称】:StandardTestMethodforDeterminationofMetallicConstituentsofTungstenAlloysandTungstenHardmetalsbyX-RayFluorescenceSpectrometry
【原文标准名称】:用X射线荧光光谱法测定钨合金和钨硬金属的金属成分用标准试验方法
【标准号】:ASTMB890-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:熔解;测试;含钨合金;X射线荧光光谱法
【英文主题词】:absorptionandenhancementeffects;fusion;interelementeffects;tungstenalloys;tungstencarbides;tungstenhardmetals;X-rayfluorescencespectrometry
【摘要】:Thistestmethodallowsthedeterminationofthechemicalcompositionofpowderedandsinteredtungsten-basedhardmetals.Thistestmethodisnotapplicabletomaterialwhichwillnotoxidizereadilyathightemperaturesinair,suchastungsten/copperortungsten/silveralloys.Thistestmethodspecifiedlithium-boratecompoundsfortheglassfusionmaterial.However,numerousotherchoicesareavailable.Theseincludeotherlithium-boratecompounds,sodiumcarbonateandboratemixtures,andothers.Themethodologyspecifiedhereisstillapplicableaslongasthesamefusionmixtureisusedforbothstandardsandspecimens.1.1Thistestmethoddescribesaprocedureforthedeterminationoftheconcentration,generallyreportedasmasspercent,ofthemetallicconstituentsoftungsten-basedalloysandhardmetalsutilizingwavelengthdispersiveX-rayfluorescencespectrometry(XRF).Thistestmethodincorporatesthepreparationofstandardsusingreagentgrademetallicoxides,lithium-boratecompounds,andfusiontechniques.Thistestmethoddetailstechniquesforpreparingrepresentativespecimensofbothpowderandsinteredtungsten-basedmaterial.Thistestmethodisaccurateforawiderangeofcompositions,andcanbeusedforacceptanceofmaterialtogradespecifications.1.2Thistestmethodisapplicabletomixturesoftungstenortungstencarbidewithadditionsofrefractorymetalcarbidesandbindermetals.Table1liststhemostcommonelementalconstituentsandtheirconcentrationrange.Notethatmanyoftheseoccurasmetalliccarbides.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H14
【国际标准分类号】:71_040_50;77_040_30
【页数】:5P.;A4
【正文语种】: