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中文摘要：
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1180℃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。
英文摘要：
Abstract：Impacts of morphology and microstructure of yellow tungsten on properties of nanometer WC powders were studied. Two kinds of nanometer W powders were obtained respectively by hydrogen reduc-tion of pretreated fine-grained yellow tungsten and normal yellow tungsten in a tube furnace at 560-760 ℃. After mixed with carbon black powders,both the two kinds of W powders were carbonized at 1 180 ℃ to prepare nanometer WC powders. Ultrafine-grained WC-Co sintered bodies were obtained by mixing, pressing and sintering of WC powders. And then the properties of nanometer WC powders and WC-Co sin- tered bodies were characterized. The results show that nanometer W powders of loose microstructure and good dispersion can be obtained more easily with fine-grained yellow tungsten of loose porous microstruc-ture. The obtained nanometer WC powders are more uniform,and the corresponding ultrafine-grained WC -Co sintered body has uniform microstructure and excellent performance.
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