采用 3H ES型金属表面强化修复机对航空发动机GH2 6 96铁基高温合金密封环件外侧面进行渗碳处理 ,用扫描电镜 (SEM)、X射线衍射 (XRD)与电子探针 (EPM)等测试分析表明 ,渗碳层深度约为2 0 μm ,由γ Fe基体、TiC、Cr7C3以及石墨等组成。表明在高功率高频率微弧火花放电作用下可以对铁基高温合金进行表面渗碳强化处理 ;渗碳层具有快速熔凝和碳扩散相变双重组织特征。与国外进口的同类试样进行了对比分析。耐磨性实验结果表明 ,合金渗碳后耐磨性显著提高。 The outer surface of aeroengine GH2 6 96 iron-based superalloy seal ring was carburized by 3H ES metal surface hardening repair machine. SEM, X-ray diffraction (XRD) and electron probe (EPM) The test results show that the depth of carburized layer is about 20 μm and consists of γ Fe matrix, TiC, Cr7C3 and graphite. It indicates that the carburizing can be carburized and strengthened on the surface of iron-based superalloy under the action of high-power and high-frequency micro-arc spark discharge. The carburized layer has the characteristics of rapid solidification and double phase transformation of carbon diffusion. Compared with similar samples imported from abroad. Wear resistance experimental results show that the wear resistance of the alloy after carburizing significantly increased.