Investigation and Research on the requirements of

2022-08-24
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Investigation and Research on the requirements of high life and low pollution in tool manufacturing

with the development of science and technology, the requirements for the surface properties of materials are becoming higher and higher. In recent decades, with the rise of various vapor deposition technologies, the research and application of surface engineering technology have made rapid progress. With the development of science and technology, the requirements for the surface properties of materials are getting higher and higher. In recent decades, with the rise of various vapor deposition technologies, the research and application of surface engineering technology have made rapid progress. These technologies not only meet the requirements of mechanical properties, such as wear resistance, friction reduction and corrosion resistance, but also play an important role in the field of functional materials related to the surface layer, such as electromagnetism, optics, optoelectronics, thermology, superconductivity and biology. Surface engineering not only makes low-cost metal materials play a greater advantage in performance and efficiency, but also has become an important means to develop various new coating and film materials for low precision, which has great application potential

with the improvement of machining industry, new requirements are put forward for cutting tools. In addition to improving the service life, it is also required to reduce the pollution during cutting and use dry cutting as much as possible. When the cutting fluid cannot be completely eliminated, try to make it contain only rust inhibitor and no organic matter, which can greatly reduce the cost of recycling

the diversity of cutting tools and the characteristics of working conditions during use determine the different coating of cutting tools in Jiangsu Province. Turning and drilling are different, and the milling cutter should also consider the intermittent impact characteristics, especially the good reputation of Angang plate and Fengbao pipe industry in surrounding provinces and cities. The coating developed in the early stage takes wear resistance as the main focus and hardness improvement as the main index. This kind of coating, represented by titanium nitride, has a high friction coefficient (0.4 ~ 0.6), and continuous friction with the workpiece during processing will produce a lot of heat energy. In order to avoid overheating and deformation of the tool, which will affect the machining accuracy and prolong its service life, cutting fluid is usually used

to solve the problem of reducing or eliminating cutting fluid, the tool coating should not only make the tool have a long life, but also have the function of self lubrication. The appearance of diamond-like carbon coating (DLC) shows its advantages in the machining of some materials (al, Ti and their composites, but the previous manufacturing equipment and processes are far from meeting today's needs). However, after years of research, it has been shown that the diamond-like carbon coating has three disadvantages: high internal stress, poor thermal stability and catalytic effect with ferrous metals, which makes the SP3 structure change to SP2, Therefore, it can only be used to process non-ferrous metals at present, which limits its further application in machining. However, recent studies have shown that the hardness of diamond-like carbon coating (also known as graphite-like coating) with SP2 structure can also reach 20 ~ 40gpa, but there is no problem of catalytic effect with ferrous metals. Its friction coefficient is very low and has good moisture resistance. Coolant can also be used for dry cutting, and its service life is twice as long as that of a front windshield coating knife made of transparent resin, There is no problem in processing steel materials, which has aroused great interest of coating companies and tool manufacturers. Over time, this new type of diamond-like carbon coating will be widely used in the cutting field

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