矿用硬质合金摩擦、腐蚀行为研究进展

Research progress on friction and corrosion behavior of mining cemented carbide

摘要:

硬质合金是一种包括硬质相(WC)和软粘结相(Fe、Co、Ni、HEA等)的金属陶瓷,其耐摩擦、高硬度、热硬性好等优良特性的组合使得硬质合金被广泛应用于矿山、隧道、钻井等地质工程。由于实际服役环境复杂,矿用硬质合金常面临极端恶劣的工况,存在诸多失效机制,例如摩擦、腐蚀和热冲击等一种甚至共同作用都会造成硬质合金材料的失效。因此,了解矿用硬质合金的失效机理,对不同环境下选用和改进硬质合金材料具有重要意义。本文对矿用硬质合金的摩擦、腐蚀行为进行了综述,重点涉及环境和热应力对硬质合金失效的影响,此外,由于成分对硬质合金的微观结构和力学性能具有重要的影响,还综述了粘结相和添加剂的加入对硬质合金摩擦、腐蚀行为的影响。旨在为后续硬质合金的选择、改进和新型硬质合金开发提供参考。

Abstract:

Cemented carbide is a kind of hard phase (WC) and soft bonded phase (Fe, Co, Ni, HEA, etc.) of cermet, its combination of friction resistance, high hardness, good hot hardness and other excellent characteristics make cemented carbide widely used in mines, tunnels, drilling and other geological engineering. Due to the complex actual service environment, cemented carbide in geological engineering applications often face extremely harsh working conditions, and there are many failure mechanisms, such as friction, corrosion and thermal shock, etc. and even a combination will cause the failure of cemented carbide materials. Therefore, understanding the failure mechanism of cemented carbide in geological engineering applications is of great significance for the selection and improvement of cemented carbide materials in different environments. In this paper, the friction and corrosion behavior of cemented carbide for mining are reviewed, focusing on the influence of environmental and thermal stress on cemented carbide failure, in addition, due to the important influence of composition on the microstructure and mechanical properties of cemented carbide, the influence of binder phase and additives on the friction and corrosion behavior of cemented carbide is also reviewed. It aims to provide a reference for the selection, improvement and development of new cemented carbide in the future.