What is the development of tool technology and market in the future?
In the future development of cutting tool technology and market in China, the structure of cutting edge has always been an extremely important factor that constitutes the working performance of cutting edge together with matrix material and coating technology in the manufacturing technology of cutting tool. As far as the geometry of cutting edge itself is concerned, the endless structure of cutting edge will still be continuously pushed out, but its goal will mostly be to achieve a higher level of balance in the aspects of sharpness, impact resistance, chip breaking and stress heating.
In the aspect of tool manufacturing, one of the important measures to improve the tool is to choose the appropriate tool coating. There are two main methods of tool coating: chemical vapor deposition (CVD) and physical vapor deposition (PVD). At present, CVD coating is mainly used for carbide indexable inserts for machining steel and iron castings, especially for turning inserts, while PVD coating is mainly used for other cutters, including integral carbide cutters. At present, CVD coatings are relatively few: mainly used for Al2O3 coating and diamond (PCD) coating. Although there are not many kinds of coatings suitable for coating, because one of the two coatings (Al2O3) is particularly suitable for processing steel and cast iron, and the other (PVD) is particularly suitable for lightweight aluminum alloy for automobile and carbon fiber reinforced composite materials with rapid growth in aerospace, wind power, etc., this technology still has great development prospects. It is predicted that the development direction of Al2O3 coating will be to obtain a larger thickness of α - phase Al2O3 layer, controlled nucleation and directional growth technology of grains, grain refinement technology, and to reduce and eliminate microcracks and droplets in the coating. Because of its own characteristics, the development of PVD technology should be diversified. It is predicted that on the one hand, the PVD coating will be mainly achieved by adding trace elements to improve the wear resistance of the coating, improve the heat resistance of the coating, reduce the friction between the coating chip friction pair or the coating workpiece machined surface friction pair, and reduce the transfer of cutting heat to the tool; on the other hand, the mechanical and chemical properties of the coating itself will be improved by refining the coating grains.