闭环气流磨粉碎氢化钛粉

发布时间：2018-05-12 12:11

本文选题：闭环气流磨 + 氢化钛粉　；参考：《粉末冶金材料科学与工程》2017年04期

【摘要】：随着钛及钛合金粉末冶金技术的快速发展,采用氢化钛粉代替钛粉作为主要原料制备粉末冶金钛材料已成为国内外的研究热点。本文研究了闭环气流磨系统粉碎氢化钛的工艺过程及特点,并采用SEM、化学分析以及激光粒度测试分析等表征所制备氧化钛粉的形貌、氧含量及粒度分布。结果表明:氢化钛经闭环气流磨后,粒度(D_(50))达到5.94μm;不同粒径(粉末粒径分别为250,150,75和48μm)的氢化钛粉在闭环气流磨分级轮频率为200Hz下,粒度(D_(50))达到10μm以内,且粒度分布区间较窄;而同一粒径(250μm)的粉末在闭环气流磨不同分级轮频率下(80,100,120,140,160,180和200 Hz)分级后,粉末的粒度(D_(50))和粒度分布区间随分级轮频率的降低而增大和变宽;因为闭环气流磨系统是封闭的循环回路,采用高纯氩气作为磨料介质,因此物料粉碎前后的增氧量低。
[Abstract]:With the rapid development of titanium and titanium alloy powder metallurgy technology, the preparation of powder metallurgy titanium materials using titanium hydride instead of titanium powder as the main raw material has become a hot spot at home and abroad. In this paper, the technological process and characteristics of the closed-loop airflow mill system for grinding titanium hydride were studied. The morphology, oxygen content and particle size distribution of the prepared titanium oxide powder were characterized by SEM, chemical analysis and laser particle size measurement. The results showed that the particle size of titanium hydride was 5.94 渭 m after closed-loop airflow milling, and the particle size of titanium hydride powder with different particle sizes (250150 渭 m and 48 渭 m respectively) was less than 10 渭 m and the particle size distribution was narrower than 10 渭 m when the frequency of closed-loop airflow mill classifier wheel was 200Hz, and the particle size distribution of titanium hydride was less than 10 渭 m. However, the powder with the same particle size (250 渭 m) and the particle size distribution increased and widened with the decrease of the frequency of the wheel, and the particle size and distribution range of the powder were increased and widened with the decrease of the frequency of the classifying wheel after the powder was classified by 80100120140160180 and 200Hz) under the different frequency of the closed-loop airmill, the particle size of the powder increased with the decrease of the frequency of the wheel. Because the closed-loop airflow mill system is a closed loop with high purity argon as abrasive medium, the increase of oxygen is low before and after comminution.
【作者单位】：成都理工大学材料与化学化工学院;攀枝花学院;
【基金】：国家自然科学基金资助项目(51174122) 四川钒钛产业技术研究院项目(2013GC0146) 攀枝花科技局项目(2014CY-G-5)
【分类号】：TF123.23

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