What are the characteristics of cutting tools made of titanium based alloys and ceramic materials in precision parts processing

With the continuous development of the modern machining industry, the performance of ordinary cutting tools in the process of precision parts processing is increasingly unable to meet practical needs. This has led to the emergence of a batch of new types of cutting tools using new materials, making them have higher strength, hardness, and wear resistance. Titanium based alloys and ceramic materials are among the best among them.

Carbon and titanium nitride based hard alloys are mainly composed of TiC, TiN, and other carbides or oxides, and are bonded with nickel and molybdenum as binders. Its main advantages include high hardness, good oxidation resistance, low friction coefficient, less chip adhesion, good resistance to crescent pit wear, and low relative density. It is called "cermet" in foreign countries and is suitable for high-speed precision machining and semi precision machining of steel parts. Currently, it is suitable for milling processing and the manufacturing of integral milling cutters.

Ceramic materials have higher hardness and heat resistance than hard alloys, and can still be cut at a temperature of 1200 ° C. They have good wear resistance and chemical inertness, low friction coefficient, and strong resistance to adhesion and diffusion wear. Therefore, they can be cut at higher speeds in precision parts processing. Ceramic materials have stronger properties compared to hard alloy materials. In order to make up for the shortcomings of ceramic materials, such as low bending strength, brittleness and poor stamping resistance, the cutting edge of ceramic blade often grinds a 20 ° negative chamfer, and the thickness and tip arc of the blade are slightly larger than those of cemented carbide blades of the same size.