In recent years, coated CNC inserts have been favored by the vast metal processing industry. About 80% of the cutting tools used in the new CNC machine tools use coated tools. Coated tools will be the most important tool varieties in the field of CNC machining in the future.
Coating the tool is one of the important ways to improve the performance of the tool. The emergence of coated tools has made a major breakthrough in cutting performance. Coated cutters are coated with one or more layers of refractory compounds with good wear resistance on the cutter body with good toughness. It combines the cutter base with a hard coating, thereby greatly improving the performance of the cutter. Coated tools can improve processing efficiency, improve processing accuracy, extend tool life and reduce processing costs.
How much do you know about the types of coated tools?
1. According to different coating methods, coated tools can be divided into chemical vapor deposition (CVD) coated tools and physical vapor deposition (PVD) coated tools. Coated cemented carbide tools generally use chemical vapor deposition method, the deposition temperature is about 1000 ℃. Coated high-speed steel tools generally use physical vapor deposition method, the deposition temperature is about 500 ℃;
2. According to the different base materials of coated cutters, coated cnc inserts can be divided into cemented carbide coated cutters, high-speed steel coated cutters, and coated cutters on ceramics and superhard materials (diamond and cubic boron nitride) Wait.
3. According to the nature of coating materials, coated tools can be divided into two categories, namely “hard” coated tools and “soft” coated tools. The main goal pursued by “hard” coated tools is high hardness and The main advantages of wear resistance are high hardness and good wear resistance, typically TiC and TiN coatings. The goal of “soft” coated tools is low coefficient of friction, also known as self-lubricating tools, which are The friction coefficient is very low, only about 0.1, which can reduce bonding, reduce friction, and reduce cutting force and cutting temperature.
Recently developed a nano-coated (Nanoeoating) tool. This coating tool can use different combinations of multiple coating materials (such as metal/metal, metal/ceramic, ceramic/ceramic, etc.) to meet different functional and performance requirements. The well-designed nano coating can make the cutting tool material have excellent anti-friction and anti-wear functions and self-lubricating properties, which is suitable for high-speed dry cutting.