中文摘要：

对氩气雾化（AA）FGH96合金不同粒度急冷粉末颗粒表面进行俄歇电子能谱（AES）分析，对不同温度下进行预热处理粉末中碳化物的演变行为进行了研究，并讨论了粉末颗粒表面成分和预热处理时碳化物变化和转变的关系。结果表明：不同粒度FGH96合金原始粉末颗粒表面存在不同厚度C、O和Ti元素的污染层；经预热处理，粉末颗粒中MC＇型亚稳碳化物发生分解和转变，析出稳定MC、M23C6及M6C型碳化物，明显改变粉末颗粒内碳化物的稳定性和分布状态。

英文摘要：

The surface of FGH96 superalloy powder particles of the different sizes prepared by Argon Gas Atomization （AA） was analyzed by Auger Electron Spectroscopy （AES） . The evolution of behaviors of carbides in powder particles pre- pared by pre--heat treatment of different temperatures was studied. The composition of powder particles surface and the changes and transformations among the carbides in powder particles prepared by pre-heat treatment of different temperatures was discussed. The results show that： The contaminated layers of different thicknesses of C, O and Ti elements are been in the surface of original FGH96 superalloy powder particles of different sizes. The metastable MCtype carbides in powder particles made by pre--heat treatment decompose, transform and precipitate the stable MC, M23 C6 and M6 C carbides, which significantly change the stability and distributions of carbides in powder particles.