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알칼리 침출법을 통한 초경 공구의 재활용 및 자전연소합성법을 통해 제조된 나노급 탄화텅스텐 제조공정 연구 KCI 등재
Recycling of Hardmetal Tool through Alkali Leaching Process and Fabrication Process of Nano-sized Tungsten Carbide Powder using Self-propagation High-temperature Synthesis
pp.47-55
Tungsten carbide is widely used in carbide tools. However, its production process generates a significant number of end-of-life products and by-products. Therefore, it is necessary to develop efficient recycling methods and investigate the remanufacturing of tungsten carbide using recycled materials. Herein, we have recovered 99.9% of the tungsten in cemented carbide hard scrap as tungsten oxide via an alkali leaching process. Subsequently, using the recovered tungsten oxide as a starting material, tungsten carbide has been produced by employing a self-propagating high-temperature synthesis (SHS) method. SHS is advantageous as it reduces the reaction time and is energy-efficient. Tungsten carbide with a carbon content of 6.18 wt % and a particle size of 116 nm has been successfully synthesized by optimizing the SHS process parameters, pulverization, and mixing. In this study, a series of processes for the highefficiency recycling and quality improvement of tungsten-based materials have been developed.
1. 서 론
2. 실험 방법
2.1. 초경 hard scrap의 재활용 공정을 통한 산화텅스텐제조
2.2. 자전연소합성법을 적용한 탄화텅스텐 제조
2.3 제조된 탄화텅스텐의 특성평가
3. 실험 결과 및 고찰
3.1. 텅스텐 hard scrap의 알칼리 침출 재활용 공정
3.2. 자전연소합성법을 통한 탄화텅스텐 제조공정
3.3. 혼합 방법의 최적화를 통한 SHS 원료분말 혼합공정 연구 공정 및 기계적 분쇄를 통한 탄화텅스텐의 분쇄 공정
4. 결 론
References
