(鋼鐵研究總院 高溫材料研究所，北京 100081)
摘 要: 針對(duì)等離子旋轉(zhuǎn)電極工藝制備的FGH96合金粉末，采用俄歇電子能譜對(duì)合金粉末的顆粒表面進(jìn)行成分分析，并利用透射電鏡對(duì)預(yù)熱處理后粉末中的碳化物演變進(jìn)行研究。結(jié)果表明：FGH96合金粉末的顆粒表面明顯存在O、C和Ti元素的偏聚，原始合金粉末的顆粒表面由O和C 原子吸附層和富含Ti元素的碳−氧化物層組成；經(jīng)過預(yù)熱處理，顆粒中形成于快速凝固過程中的MC′亞穩(wěn)碳化物轉(zhuǎn)變成穩(wěn)定的MC碳化物，并析出M23C6碳化物，明顯改善了顆粒內(nèi)碳化物的穩(wěn)定性和分布狀態(tài)。
關(guān)鍵字: FGH96合金粉末；俄歇分析；預(yù)熱處理；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
