When cemented carbide tools are applied, The complex stress effect on the surface and the thermal wear during high-speed operation will make the cemented carbide material (especially the cemented carbide inserts and molds) wear out very seriously, which will lead to the passivation of the carbide blade blade and greatly reduce the life of the cemented carbide material. In some special industries, some hard alloy products often have high hardness, but the toughness is not up to the standard,sometimes the toughness meets the requirements but the hardness does not meet the use requirements. So how can we make cemented carbide really have high toughness and high hardness at the same time?
In order to achieve the effect of both,many material engineers have made unremitting efforts, multiple explorations and continuous practice tests. After nearly half a century of repeated tests and Practice, constantly summarizing and improving the process, finally found a way to make the cemented carbide have both high hardness and high toughness. That is to carry out coating treatment on the surface of cemented carbide, and to coat the surface of cemented carbide with special materials with higher hardness and bending strength than cemented carbide-rare precious metals, including TiN, TiC, Ti, TiBN, TiB2, Al2O3, CVD, PVD, etc.Since the coating material has higher hardness and wear resistance than cemented carbide, the wear-resistant life of cemented carbide can be doubled after coating treatment.
The cemented carbide coating is actually a single-layer or multi-layer structure formed on the surface of the cemented carbide substrate by coating, thereby giving the cemented carbide material new properties. The benefit of coating the surface of cemented carbide products is to make the surface of cemented carbide have higher hardness, especially after multi-layer coating or multi-layer composite coating, the hardness of cemented carbide is significantly improved. The wear resistance and service life of the alloy, while not losing its core toughness, significantly improve the performance of the cemented carbide.
The coating treatment of cemented carbide can also be selectively coated according to different purposes to achieve the desired best performance effect. For example, after the cemented carbide blade is coated, its wear resistance and heat resistance can be significantly improved.
