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为研究黄钨形貌结构对纳米WC粉性能的影响,将经预处理的细颗粒黄钨和普通黄钨分别置于管式炉中经560～760℃氢还原获得纳米W粉,然后将两种纳米W粉分别与炭黑粉充分搅拌混合,并置入碳化炉中于1 180℃进行碳化,分别制备出纳米WC粉,然后进行混合料制备、压制、烧结,得到超细晶WC-Co烧结体,并对纳米WC粉及WC-Co烧结体的性能进行了表征。结果表明,具有疏松、多孔形貌结构的细颗粒黄钨更易于制备出结构疏松、分散性好的纳米W粉,生成的纳米WC粉也更均匀,所制备超细晶WC-Co烧结体的组织结构均匀,性能优。
In order to study the influence of the morphology of the yellow tungsten on the properties of the nano-WC powder, the pretreated fine particles of yellow tungsten and ordinary yellow tungsten were respectively placed in a tube furnace to obtain the nano-W powder by hydrogen reduction at 560 to 760 DEG C, N kinds of nano-W powder were mixed thoroughly with carbon black powder and placed in a carbonization furnace at 180 ℃ for carbonization to prepare nanometer WC powder respectively, and then the mixture was prepared, pressed and sintered to obtain ultra-fine grain WC-Co Sintered body, and the properties of nano WC powder and WC-Co sintered body were characterized. The results show that the fine particles of yellow tungsten with loose porous morphology can be easily prepared nano-W powder with loose structure and good dispersion. The nano-WC powder produced is more uniform. The prepared ultrafine-grained WC-Co sintered body Organizational structure, excellent performance.