闭环气流磨粉碎氢化钛粉  

Titanium hydride powder grinded by closed-loop jet mill

作　　者：王涛[1,2] 杨绍利[1,2] 龙剑平[1] 马兰[2] 李军[2] 廖先杰[2] 

机构地区：[1]成都理工大学材料与化学化工学院,成都610059 [2]攀枝花学院,攀枝花617000

出　　处：《粉末冶金材料科学与工程》2017年第4期487-495,共9页Materials Science and Engineering of Powder Metallurgy

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)

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。With the rapid development of titanium and titanium alloy powder metallurgy technology, the use of titanium hydride powder instead of titanium powder as the main raw material for the preparation of titanium powder metallurgy materials has become a hot topic at home and abroad. The process procedure and characteristics of titanium hydride powders milled in QLM-1.5 closed-loop jet mill were studied in this paper. The effects of technological parameters on the morphology, particle size and oxygen content of Ti powders were investigated by scanning electron microscopy, chemical analysis and laser-diffraction diameter tester, etc. The results show that the particle size （1950） of titanium hydride can reach 5.94 jim after being milled by closed ring air mill, and all the titanium hydride powders with different particle sizes （250, 150, 75 and 48 μm） are less than 10 μm. Furthermore, the distribution of the particle sizes is narrow. However, the powder particle size （D50） and the distribution interval of the same grain diameter （250 μm） milled by closed ring air mill at different frequency （80, 100, 120, 140, 160, 180 and 200 Hz） become bigger and wider. Meanwhile, since the closed-loop airflow grinding system is circulation loop and high purity argon is used as the abrasive medium, the mass increase of oxygen content is little after milling.

关 键 词：闭环气流磨 氢化钛粉 钛 粒度 氧含量 

分 类 号：TF123.7[冶金工程—粉末冶金]