ASTM B874-1996(2003) 用于固体渗金属处理的铬扩散镀层的标准规范

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【英文标准名称】:StandardSpecificationforChromiumDiffusionCoatingAppliedbyPackCementationProcess
【原文标准名称】:用于固体渗金属处理的铬扩散镀层的标准规范
【标准号】:ASTMB874-1996(2003)
【标准状态】:现行
【国别】:
【发布日期】:1996
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:B08.08.01
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:chromizing;corrosion-resistantcoatings;diffusioncoating;packcementation;
【摘要】:1.1Thisspecificationcoverstherequirementsforchromiumdiffusionofmetalsbythepackcementationmethod.Packdiffusionemploysthechemicalvapordepositionofametalwhichissubsequentlydiffusedintothesurfaceofasubstrateathightemperature.Thematerialtobecoated(substrate)isimmersedorsuspendedinapowdercontainingchromium(source),ahalidesalt(activator),andaninertdiluentsuchasalumina(filler).Whenthemixtureisheated,theactivatorreactstoproduceanatmosphereofchromiumhalideswhichtransferschromiumtothesubstrateforsubsequentdiffusion.Thechromium-richsurfaceenhancescorrosion,thermalstability,andwear-resistantproperties.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:25_220_40
【页数】:3P.;A4
【正文语种】: