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FGH96合金粉末的俄歇分析及預(yù)熱處理
發(fā)布人：上海艾荔艾金屬材料有限公司bt990.com.cn
更新時間：2015-10-22
針對等離子旋轉(zhuǎn)電極工藝制備的FGH96合金粉末，采用俄歇電子能譜對合金粉末的顆粒表面進(jìn)行成分分析，并利用透射電鏡對預(yù)熱處理后粉末中的碳化物演變進(jìn)行研究。
FGH96合金粉末的俄歇分析及預(yù)熱處理AES analysis and pre-heat treatment of FGH96 superalloy powders
針對等離子旋轉(zhuǎn)電極工藝制備的FGH96合金粉末，采用俄歇電子能譜對合金粉末的顆粒表面進(jìn)行成分分析，并利用透射電鏡對預(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)。
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.
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