高性能超细碳化钨粉质量影响因素探讨  

Factors Affecting the Quality of High Performance Ultrafine Tungsten Carbide Powder

作　　者：陈杉杉 Chen Shanshan(Xiamen Golden Egret Special Alloy Co.,LTD,Xiamen Fujian 361000,China)

机构地区：[1]厦门金鹭特种合金有限公司

出　　处：《硬质合金》2019年第5期337-344,共8页Cemented Carbides

基　　金：国家科技重大专项，数控刀片精密加工装备研制及应用示范（2017ZX04020）

摘　　要：在硬质合金的发展中,为了适应加工行业对高效、高质量金属切削工具的要求,人们对超细晶硬质合金的研究一直没有停止过。高性能超细碳化钨粉末是制备超细晶合金的首要条件。本文从原料APT、还原工艺、气流分散等关键工序,探讨均匀性好、稳定性高的超细碳化钨粉末的质量影响因素。研究结果说明,氧化钨关键指标应该包含粒度分布、相成分、氧指数及NH3、H2O含量;还原过程中,低温反应时间适应相应粒度长大,可以使钨粉的粒度更加均匀;优化分散工艺,可改善超细碳化钨粉末物理指标。During the development of cemented carbide, in order to meet the requirements of high efficiency and high quality metal cutting tools in the machining industry, the research on ultrafine grained cemented carbides has never stopped.High performance ultrafine tungsten carbide powder is the primary condition for the preparation of ultrafine alloy. In this paper, based on raw materials, reduction process, airflow dispersion and other key process, factors are discussed about homogeneity and stability of ultrafine tungsten carbide powder. The results show that the key indicators of tungsten oxide should include particle size distribution, phase composition, oxygen index, and NH3/H2 O content. In the reduction process, the reaction time at low temperature adapts to the growth of particle size, which can make the particle size of tungsten power more uniform. Optimizing dispersion process can improve physical indicators of ultrafine tungsten carbide powder.

关 键 词：超细碳化钨 还原 APT 蓝钨 气流分散 

分 类 号：TF[冶金工程]