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首页> 外文期刊>Russian Journal of Non-Ferrous Metals >Developmental tendencies of technology of ultradispersed and nanosized WC-Co hard alloys alloyed with tantalum carbide: Review
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Developmental tendencies of technology of ultradispersed and nanosized WC-Co hard alloys alloyed with tantalum carbide: Review

机译：与碳化钽合金化的超分散纳米WC-Co硬质合金技术发展趋势：综述

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摘要

The main production methods of WC powders, notably, rapid carbothermic reduction (RCR), "calcination-reduction-carburization" (CRC), reduction of tungsten oxide with carbon in rotating furnaces, spray conversion process (SCP), high-energy milling, etc., are considered. The influence of growth inhibitors of the carbide grain on the structure of hard alloys is analyzed. According to the data of some authors, the optimal inhibitor content is 0.5-1.5 wt %, and the alloy embrittles at its higher content due to the formation of complex carbide phases. It is shown that nanosized hard alloys (d (WC) < 100 nm) cannot be prepared by the traditional liquid-phase sintering the mixtures, and the application of alternative solid-phase consolidation methods is necessary. The structure, properties, and application regions of submicron and nanosized hard alloys fabricated by hot pressing, high-frequency induction pressing, electric discharge sintering under the plasma pressure consolidation (PPC), spark plasma sintering (SPS), etc., are considered.
机译：WC粉的主要生产方法，尤其是快速碳热还原（RCR），“煅烧还原碳化”（CRC），在旋转炉中用碳还原氧化钨，喷雾转化法（SCP），高能研磨，等。分析了碳化物晶粒的生长抑制剂对硬质合金组织的影响。根据一些作者的数据，最佳抑制剂含量为0.5-1.5 wt％，并且由于形成复杂的碳化物相，合金在其较高含量下脆化。结果表明，传统的液相烧结方法无法制备纳米级硬质合金（d（WC）<100 nm），因此有必要应用其他固相固结方法。考虑了通过热压，高频感应压制，等离子压力固结（PPC）下的放电烧结，火花等离子烧结（SPS）等制成的亚微米和纳米级硬质合金的结构，性能和应用领域。

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