研究45钢在乙醇胺电解液中实现以渗碳为主的碳氮共渗,获得以高碳马氏体和含氮马氏体为主的表面改性层,使其硬度达到480 HV,为基体的1.5倍,结果表明:45钢进行液相等离子体碳氮共渗依赖于原子(离子)的吸附和扩散效应.弧光放电的电离过程产生的大量活性碳、氮原子(离子)被吸附到工件表面,同时弧光放电等离子体对工件的不断轰击使工件表面迅速进入奥氏体化的高温区间,致使吸附干工件表面的碳、氮原子(离子)通过热扩散效应渗入基体并向内扩散.%Implementation of carbonitriding, mainly carburizing,on the surface of 45 steel in the C2H7NO electrolyte was investigated and a modified surficial layer with martensite microstructure containing high carbon and nitrogen in majority was obtained. Its microhardness could come to 480 HV, being 1. 5 times as much as the substrate. The results showed that electrolytic plasma carbonitriding(EPC/N)on the surface of 45 steel would depend on the effect of adsorption and diffusion of atoms (ions). During the ioniza-tion process of arc-discharge, a lot of activated carbon and nitrogen atoms (ions) were adsorbed on to the workpiece surface. At the same time, the work-piece surface was heated rapidly up to the austenitizing zone with high temperature due to the induced energy from the arc-discharge process with plasma bombarding the work-piece, and the adsorbed carbon and nitrogen atoms (ions) on the workpiece surface then penetrated and diffused into the workpiece due to thermal diffusion.
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