无金属粘结剂WC硬质合金增强增韧的研究进展与展望

无金属粘结剂WC硬质合金(Binderless tungsten carbide, BTC)硬度高，具有良好的耐磨性、耐腐蚀性，被广泛应用于刀具、耐磨零件等领域，成为近年来硬质合金领域的研究热点。然而，由于没有添加金属粘结剂，其在烧结过程中易出现晶粒长大，致密化难度加大，对烧结方法烧结工艺的要求较高，韧性难与金属粘结剂WC硬质合金相媲美。因此，一些研究人员通过添加非金属粘结剂及调整烧结工艺等方法抑制晶粒长大、促进其致密化，有效改善了BTC材料的性能。本文对于应用金属氧化物、金属碳化物、碳材料及复合增强增韧来提高BTC性能的研究进行综述，介绍了添加剂的种类、增强增韧机制及可以改善材料性能的烧结方法及烧结工艺。 

Research progress and prospect of strengthening and toughening WC cemented carbide without metal binder

WC binderless tungsten carbide (BTC) without metal binder which has high hardness, good wear resistance and corrosion resistance, is widely used in the field of tools, wear resistant parts, etc. and has become a research focus in the field of cemented carbide in recent years. However, due to the absence of the addition of metal binder, the grain growth is easy to occur in the sintering process, the densification is difficult to increase, the requirements of sintering method and process are higher and the toughness clearly inferior to the BTC without metal binder. Therefore, some researchers inhibit grain growth and promote its densification by adding nonmetallic binder and adjusting sintering process, so as to effectively improve the performance of BTC materials without metal binder. In this paper, the application of metal oxides, metal carbides, carbon materials and composite reinforcement to enhance the performance of BTC with metal binder are reviewed.