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本文对18Cr_2Ni_4WA钢进行了不同参数的软氮化处理试验,得出采用醇氨比为2:8,温度570℃、保温4—5小时的气体软氮化处理后,试样的硬度和渗层深度皆能达到技术要求,可以代替盐浴软氮化.用高压透射电镜对表层金属薄膜进行形貌和结构分析,发现表面化合层是条状e相和γ’相亚晶,并且有较高的位错密度,这种组织状态赋于材料高硬度和较好的耐磨性.
In this paper, the nitrocarburizing treatment of 18Cr_2Ni_4WA steel with different parameters was carried out. The results showed that after the nitrocarburizing with gas-ammonia ratio of 2: 8, the temperature of 570 ℃ and the holding time of 4-5 hours, Depth can meet the technical requirements, can replace the salt bath soft nitriding.Using high-pressure transmission electron microscopy morphology and structure analysis of the surface of the metal film and found that the surface of the composite layer is the strip e phase and γ ’phase sub-crystal, and higher The density of dislocations, this state of the organization gives the material high hardness and better wear resistance.