FGH96合金粉末的俄歇分析及预热处理  

AES analysis and pre-heat treatment of FGH96 superalloy powders

作　　者：刘建涛[1] 张义文[1] 

机构地区：[1]钢铁研究总院高温材料研究所,北京100081

出　　处：《中国有色金属学报》2012年第10期2797-2804,共8页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展计划资助项目(2010CB631204)

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。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 M23C6precipitates. This improves the stability and distribution state of carbide in the particles.

关 键 词：FGH96合金粉末 俄歇分析 预热处理 碳化物 

分 类 号：TF125.212[冶金工程—粉末冶金]