45#钢液相等离子体电解渗透表面改性技术研究

Surface Modification Technology Research on 45 # Steel Liquid-phase Infiltration Plasma Electrolytic Saturation

应用液相等离子体电解渗透技术处理45#钢，探索了在无机盐与甲酰胺组成的电解液体系下短时间内实现渗氮为主、同时有少量碳渗入的可能性。一般情况下，工作时工件为阴极，不锈钢或镍为阳极。在本工艺中，当电压较低时，为低温氮碳共渗，以渗氮为主；当电压较高时，属于碳氮共渗，以渗碳为主。结果表明，使用此技术碳氮共渗时间只需10～12min，表面改性层厚度即达30-50μm，其中化合物层20-30μm，扩散层10-20μm。

45# steel treated by liquid--phase infiltration plasma electrolytic saturation technology, and the possibility of nitriding infiltration and at the same time infiltration of small amount of carbon in a short period under the formamide electrolyte system composed by inorganic salt and formamide was explored. Under normal circumstances, the workpiece in work is cathode, stainless steel or nickel is anode. In this process, when the voltage is relative low, it is mainly the nitrocarburizing nitriding. When the voltage is relative high, it is the carbonitriding, mainly carburizing. The results show that： for ear bonitriding, the 20-30μm surface layer and 10-20μm diffusion layer could be formed only in 10- 12 minutes with this technology.