Application of coated tool processing technology

With the increasing cutting speed of the tool, the quality and performance requirements of the coating are getting higher and higher, which not only requires the coating to have super hardness, wear resistance, but also the surface finish of the tool, the surface finish of the processed product. The requirements are also getting higher and higher.

Therefore, the post-treatment process of the coating has begun to receive widespread attention. This technology is mainly used for the coating of different tools, and then the surface of the coated tool is polished and polished by special equipment. The coating tool life through this treatment can be increased by 20%~100 based on the life of the common coating tool. %about.

Through this post-treatment, the micro-particle phenomenon generated during the arc evaporation process can be completely solved. As we all know, the arc evaporation process can produce super-energy, which is unmatched by any other process. The energy radiation surface generated by the arc evaporation process is extremely strong, which can make the target highly ionized and form a high-precision plasma zone, thus forming Ultra-strong bonding, highly dense film. But at the same time, it will also produce tiny particles on the surface of the coating, although this tiny particle can only be observed under a high power microscope, if it is completely negligible compared to the surface roughness of the tool itself, and it is normal. Machining has no effect. However, with the continuous advancement of technology, various new materials and difficult-to-machine materials are continuously applied to various high-precision fields, and users have higher and higher requirements for tool quality, durability and performance. Surface quality requirements are getting higher and higher.

In response to this situation, the coating post-treatment process developed by PVT has completely solved the particle problem in the arc evaporation process. In particular, our PVT company's high-aluminum titanium film post-treatment: AlTiNPT (aluminum-titanium ratio 70/30), the film itself has super-hard, wear-resistant, high-temperature resistance, and after coating, post-treatment, film The surface of the layer is fine and smooth, which greatly reduces the cutting resistance and enhances the chip removal function during the cutting process, thereby improving the cooling effect during the cutting process and greatly prolonging the use effect and life of the tool. At present, our post-processing technology is mainly applied to the turbine cutters in the steam turbine industry, high-speed dry-cutting end mills, carbide indexable inserts and other high-quality tools. With the continuous recognition of customers, we have gradually extended this process to other high-quality taps, reamers and various types of mold coatings.

Ultra-thick coating in the field of aviation

The film layer formed by the PVD process is generally thin, and the thickness of the film applied to the common tooling is generally about 1 μm to 5 μm, and the maximum is not more than about 10 μm. However, according to the requirements of customers, PVT has successfully developed a film layer of about 10μm~50μm after three years of research and development. This film is currently applied to the blade coating of aircraft engines, which are characterized by super-hard wear, oxidation, friction and corrosion resistance. Mainly the engine blades on military helicopters. Because they often fly in the desert, the blades of the engine should have the function of abrasion resistance and sand-resistant impact. After the ultra-thick coated engine blades, the service life can be provided about 3 times, which not only greatly reduces The cost of manufacturing the engine blades also doubles the maintenance time of the aircraft. This maintenance cost and time savings are much higher than the cost of blade manufacturing. Therefore, the film has a very high cost performance. The ultra-thick coating developed by PVT has a coating temperature of low temperature coating and a temperature between 300 ° C and 500 ° C. It does not affect the performance of the substrate to be coated. Therefore, this technology is also being applied to Some require high performance wear parts coated above.

PVT introduced the latest generation of PVTM4.2/ARC vacuum super-hard coating system this year. The main process is PVD low-temperature physical vapor deposition (coating temperature between 180 °C and 500 °C), using the world's leading dynamic magnetron cathode. Arc evaporation technology uses a large area rectangular arc evaporation source and fully automated process control. The system has the characteristics of high production capacity, compatibility and flexibility. The system can also provide dozens of composite nano-coatings such as TiN, TiCrN, AlTiN, AlCrN, AlTiCrN, CrN, CrC, ZrN. It mainly provides coating processing for various tools, molds and parts. The life of the processed workpiece can generally be increased by about 3 to 5 times.

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