The toughness of the PCD and CBN superhard tool materials and the improvement of the manufacturing process have enabled the application field to expand. Cylinder boring tools made of CBN have been used in automatic production lines as well as in the processing of cast iron and quenching hardware, and have expanded from the field of finishing to semi-finishing, which has greatly improved the efficiency of cutting. Aluminum alloy is an important material in the aerospace industry and the automotive industry. High-efficiency processing of aluminum alloy is a key technology in these two industrial sectors. At present, due to the wide application of various high-performance tools made with PCD, the cutting efficiency is significantly improved, the highest. The cutting speed has reached 7000m/min.

The products have been expanded from the original turning tools and face milling cutters to end mills, drill bits, reamers, forming tools, etc.; PCD is also the only efficient tool for processing non-metallic materials such as graphite and synthetic materials. It can be foreseen that with the promotion of CBN and PCD tools, the variety of tools will further increase, and the application field will be further expanded, leading to the development of cutting processing towards high-speed and high-efficiency machining.

The development of high-speed steel materials is still mentioned in the development of tool materials. Although the sales of high-speed steel tools and cemented carbide tools are reduced by about 5% per year, high-performance cobalt high-speed steel and The use of powder metallurgy high speed steel is increasing. These two high-performance high-speed steels have a long history, they have better wear resistance, red hardness and reliability than ordinary high-speed steel, especially the performance of powder metallurgy high-speed steel, but due to the price High, used to be used in the aerospace industry to process difficult materials. With the pursuit of cutting efficiency and the change of concept, these high-performance high-speed steel tools are first widely used in automatic lines, such as drills, end mills, taps and other general-purpose tools and gear cutters, broaches and other sophisticated tools. Received improved cutting speed and machining quality, reliable use and extended tool life. In recent years, the above-mentioned tools made of high-performance high-speed steel have been expanded and applied to general processing, and have become a conventional product of foreign high-speed steel tools.

In summary, in the development of various tool materials, cemented carbide plays a leading role, but the performance of other tool materials has also been significantly improved, expanding their respective application areas, forming a variety of tool materials. There are unique advantages and scope of use that replace each other to complement the overall pattern. It can be said that the comprehensive and rapid development of tool materials has laid the foundation for today's high-speed, high-efficiency metal cutting.

Third, coatings are a key technology to improve tool performance.

The coating technology of the tool plays an important role in the development of modern cutting and cutting tools. It has developed very rapidly since its inception, especially in recent years. Chemical coating (CVD) is still the main coating process for indexable inserts. New processes such as medium temperature CVD, thick film aluminum oxide, and transition layer have been developed. Based on the improvement of the base material, the CVD coating is resistant. Both wear and toughness are improved; CVD diamond coatings have also made progress, improving the surface finish of the coating and entering a practical stage. At present, the coating ratio of foreign carbide indexable inserts has reached more than 70%. During this period, the progress of physical coating (PVD) has been particularly noticeable, and significant progress has been made in furnace structure, process, and automatic control, and not only heat resistance suitable for high-speed cutting, dry cutting, and hard cutting has been developed. Better coatings, such as Super TiAlN, and TiAlCN general-purpose coatings with better overall performance and DLC, W/C anti-friction coatings, and through the innovation of coating structure, developed nano- and multi-layer structures, Improves coating hardness and toughness. Table 2 shows the latest coatings from the Swiss company PLATIT.

The new development of PVD coating technology shows us the great potential and unique advantages of coating technology for improving tool performance: new coatings can be developed through the control of coating process parameters and the adjustment of target and reaction gases. To meet the needs of processing diversity, it is a fast and good technology to improve and improve tool performance, and has a very broad application prospect.

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