纳米WC/Co复合粉产业化技术研究  

Research on Industrial Preparation Technology of Nano WC/Co Composite Powder

作　　者：张璐[1,2] 

机构地区：[1]硬质合金国家重点实验室,湖南株洲412000 [2]株洲硬质合金集团有限公司,湖南株洲412000

出　　处：《硬质合金》2016年第1期19-23,共5页Cemented Carbides

摘　　要：关于纳米WC/Co复合粉制备技术的研究报道有很多,但实现产业化的技术方案较少。本文在自主研发设计的离子交换系统、高温流态化床等设备平台上,以偏钨酸铵(AMT)、碳酸钴(Co CO3)、乙二胺四乙酸(C10H16N2O8)为原料,首先采用离子交换、溶液复合法得到一定配比的钨钴复合溶液,然后进行喷雾干燥、煅烧得到前驱体钨钴复合氧化物,最后在高温流态化床中连续还原-碳化-调碳后得到不同钴含量的纳米WC-Co复合粉末,采用SEM、XRD等分析方法对粉末进行形貌观察及物相分析。制备所得WC/Co复合粉质量稳定,具有杂质含量低、碳化率高、游离碳含量低的特点,其中WC的亚晶尺寸小于100 nm,表明所开发的产业化技术切实可行。There have been many reports on the preparation technology of nanometer WC/Co composite powder but less for the industrial production. In this research, partial ammonium tungstate（AMT）, cobalt carbonate（Co CO3） and ethylene diamine tetraacetic acid C10H16N2O8 were used as raw materials, firstly a compound solution containing a certain proportion of tungsten and cobalt was obtained through ion exchange and solution compounding, then tungsten and cobalt composite oxides precursor was synthesized by spray drying and calcinations, finally nano WC/Co composite powder with different cobalt content was prepared after continuous reduction, carburization and carbon adjusting in high temperature fluidized bed, wherein the equipment is independently researched and developed, such as ion exchange system, high temperature fluidized bed, etc. The morphologies and phase components of the powder were investigated by SEM and XRD, respectively.The results show that the prepared WC/Co composite powder has the characteristics of stable quality, low content of impurity, high carbonization rate and low content of free carbon, and the subgrain size of WC is less than 100 nm, which indicates that the industrial process and equipment developed in the research are feasible.

关 键 词：产业化 WC/Co复合粉 离子交换 流态化 

分 类 号：TB44[一般工业技术]