(钢铁研究总院 高温材料研究所，北京 100081)
摘 要: 针对等离子旋转电极工艺制备的FGH96合金粉末，采用俄歇电子能谱对合金粉末的颗粒表面进行成分分析，并利用透射电镜对预热处理后粉末中的碳化物演变进行研究。结果表明：FGH96合金粉末的颗粒表面明显存在O、C和Ti元素的偏聚，原始合金粉末的颗粒表面由O和C 原子吸附层和富含Ti元素的碳−氧化物层组成；经过预热处理，颗粒中形成于快速凝固过程中的MC′亚稳碳化物转变成稳定的MC碳化物，并析出M23C6碳化物，明显改善了颗粒内碳化物的稳定性和分布状态。
关键字: FGH96合金粉末；俄歇分析；预热处理；碳化物
（High Temperature Material Research Institute, Central Iron and Steel Research Institute, Beijing 100081, China）
Abstract:The chemical composition on particle surface of FGH96 superalloy powders was analyzed by means of auger electron spectroscopy (AES), and the carbide evolution after pre-heat treatment was also analyzed by TEM. The results show that elements O, C and Ti segregate on the particle surface, which is composed of absorption layer and oxy-carbides layer. The absorption layer is mainly composed of O and C atoms, while the oxy-carbides layer is characterized as Ti oxide and carbide. MC′ metastable carbide precipitates during the quick solidification, after the pre-heat treatment, the metastable carbide MC′ changes to stable MC carbide and M23C6 precipitates. This improves the stability and distribution state of carbide in the particles.
Key words: FGH96 superalloy powder; auger electron spectroscopy; pre-heat treatment; carbide
