氧化钨粉还原碳化机理分析及超细碳化钨粉的制备  

Reduction Carbonization Mechanism Analysis of Tungsten Oxide Powder and Preparation of Ultrafine Tungsten Carbide Powder

作　　者：陈丽杰 谢中华 王瑞祥 田磊 聂华平 CHEN Li-jie;XIE Zhong-hua;WANG Rui-xiang;TIAN Lei;NIE Hua-ping(School of Metallurgical and Chemical Engineering,Jiangxi University of Science and Technology, Ganzhou 341000, China)

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000

出　　处：《稀有金属与硬质合金》2018年第2期11-15,20,共6页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金(51564021);国家自然科学基金地区基金(51564020);江西理工大学博士科研启动基金(jxxjbs17045);2017年赣州市科技局科技重大专项

摘　　要：以碳化过程和碳化机理分析为基础,以蓝钨(WO_(2.9))和紫钨(WO_(2.72))为原料,研究了碳化温度、碳化时间和W粉粒度对制取WC粉粒度的影响。试验结果表明,以WO_(2.72)为原料时,所制备的粉末粒度均小于以WO_(2.9)为原料所制备的粉末粒度,故以WO_(2.72)为还原碳化制备超细WC粉的原料为最优选择。在W粉粒度为0.2~0.3μm,碳化温度为1 350℃,碳化时间为10min/舟的条件下,最终得到WC粉粒度为0.4~0.5μm,完全符合超细WC粉末标准。Based on the analysis of carbonization process and carbonization mechanism, using blue tungsten oxide （WOa9） and violet tungsten oxide （WO2.72） as the raw material,the effects of carbonization temperature, carbonization time and particle size of W powder on the particle size of tungsten carbide powder were studied. The experimental results show that using WO2.72 as the raw material,the particle size of the prepared powder is smaller than that using WO2.9 as the raw material. Therefore, WO2 72 is the optimal raw material for the preparation of ultrafine tungsten carbide powder by reduction carbonization. Under the conditions of tungsten powder particle size of 0. 2-0.3 μm,carbonization temperature of 1 350 ℃,and carbonization time of 10 min/boat,the particle size of the final tungsten carbide powder is 0.4-0.5 μm,completely in accordance with the ultrafine WC powder standard.

关 键 词：氧化钨 氢还原 碳化机理 W粉 超细WC 

分 类 号：TF841.1[冶金工程—有色金属冶金]