【摘要】 本文论述了对铁丝、２０、４５、４０Ｃｒ采用不同温度不同催渗剂进行了奥氏体气体、固体氮碳共渗的研究，并对试样进行了金相分析，硬度测定，电子探针成分分析。结果表明，在７２０℃以下进行催渗奥氏体氮碳共渗，渗层深度，硬度增加显著；氮碳共渗后快冷，在渗层获得马氏体组织。更多还原

【Abstract】 In this paper, austenitic nitro-carburizing of iron wire, 20, 45 and 40 Cr steel is studied atdifferent temperatures and with different catalyst-accelerators by way of optical metallographexamining, hardness measuring and electronic microprobe composition analysing. It has beenproved that the nitro-carburized layer gets markedly thicker and its hardness much higherwhen the austenitic nitro-carburizing with catalyst-accelerator takes place between 600℃￣720℃. After austenitic nitro-carburizing and rapid cooling, martensite is obtained at theaustenitic nitro-carburized layer.更多还原