| 氩气雾化高温合金粉末的凝固组织特征 |
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| 引用本文： | 高正江,张国庆,李周,袁华,许文勇,张勇,刘娜.氩气雾化高温合金粉末的凝固组织特征[J].粉末冶金技术,2011,29(2):93-97. |
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| 作者姓名： | 高正江 张国庆 李周 袁华 许文勇 张勇 刘娜 |
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| 作者单位： | 北京航空材料研究院先进高温结构材料国防科技重点实验室; |
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| 基金项目： | 北京市科技计划课题资助项目(D09080300510000); 航空基金项目(2008ZF21007); 国家重点基础研究发展计划资助项目(2010CB631205) |
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| 摘 要： | 为深入了解高温合金粉末粒度细化对粉末涡轮盘性能的影响,对不同尺寸氩气雾化高温合金粉末的凝固组织特点进行了分析和研究.结果表明:AA粉表面和内部凝固组织主要为树枝晶和胞状晶组织,晶界和枝晶间分布少量富Ti、Nb的MC型碳化物.随着粉末尺寸的减小,冷却速率增大,组织从树枝晶向胞状晶转变,基体γ相晶面间距和点阵常数增加.小尺...
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| 关 键 词： | 高温合金粉末 凝固组织 氩气雾化 快速凝固 |
Microstructure characteristics of superalloy powders during rapid solidification prepared by argon atomisation |
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| Gao Zhengjiang,Zhang Guoqing,Li Zhou,Yuan Hua,Xu Wenyong,Zhang Yong,Liu Na.Microstructure characteristics of superalloy powders during rapid solidification prepared by argon atomisation[J].Powder Metallurgy Technology,2011,29(2):93-97. |
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| Authors: | Gao Zhengjiang Zhang Guoqing Li Zhou Yuan Hua Xu Wenyong Zhang Yong Liu Na |
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| Affiliation: | Gao Zhengjiang,Zhang Guoqing,Li Zhou,Yuan Hua,Xu Wenyong,Zhang Yong,Liu Na(National Key Laboratory of Science and Technology on Advanced High Temperature Structural Materials,Institute of Aeronautical Materials,Beijing 100095,China) |
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| Abstract: | The microstructure characteristics of superalloy powders prepared by argon atomisation have been investigated.The results show that the solidification microstructures of surface and interior of particles are dentrite and cellular strctures.With decreasing of the particle size,the microstructures of particles change from dentrite in major to cellular strctures.MC-type carbides riched with Ti and Nb are the major precipitate phase located in grain boundary and interdentrite.Having a higher cooling rate,a smal... |
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| Keywords: | superalloy powders microstructure argon atomisation rapid solidification |
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