直接还原碳化法制备超细碳化钨粉的工艺研究

摘要

Ultrafine WC powder was prepared by direct reduction & carburization method by using tungsten trioxide as raw materials. This paper studies the effects of carbonization temperature, carbonization time and the carbon content on the phase and particle morphology of synthetic product by analyzing its reaction mechanism. Results show that ultrafine WC powder can be best synthesized by direct reduction & carburization processing at 1 200 X, for three hours when carbon content is 0.21 under flowing nitrogen gas.%采用三氧化钨直接还原碳化法制备超细碳化钨粉,研究了碳化温度,碳化时间及配碳量等工艺参数对合成产物的物相和颗粒形貌的影响,并对反应机理进行了探讨.结果表明,在氮气气氛下,采用直接还原碳化法制备超细碳化钨粉的最佳工艺参数为:碳化温度1 200℃,碳化时间3h,配碳量021.