What kind of development will the tool technology and market have in the future?
Tool technology and market In China's future tool development, in terms of tool manufacturing technology, the structure of the cutting edge has always been an extremely important factor that constitutes the working performance of the cutting edge together with the base material and coating technology. As far as the geometry of the cutting edge itself is concerned, an endless stream of edge structures will still be pushed out, but the goal is mostly to achieve a higher level in terms of sharpness, impact resistance, chip breaking, and stress and heat. balance.
In tool manufacturing, an important measure to improve the tool is to choose a suitable tool coating. There are two main methods of tool coating: chemical vapor deposition (CVD) and physical vapor deposition (PVD). At present, carbide indexable inserts for machining steel and cast iron, especially turning inserts, mainly use CVD coatings, while other tools, including solid carbide tools, mainly use PVD coatings. From the current point of view, CVD coatings can adapt to relatively few varieties of coatings: mainly used for Al2O3 coatings and diamond (PCD) coatings. Although there are not many varieties suitable for coating, one of these two coatings (Al2O3) has great market demand because it is especially suitable for processing steel and cast iron, while the other (PVD) is especially suitable for lightweight aluminum alloys and Aerospace, wind power and other fast-growing carbon fiber reinforced composite materials, this technology still has great development prospects. The author predicts that the development direction of Al2O3 coating should be to obtain a thicker α-phase Al2O3 layer, controlled nucleation and directional growth technology of grains, grain refinement technology, reduction and elimination of microcracks and droplets in the coating, etc. aspect. The development of PVD technology should show a diversified trend because of its own characteristics. On the one hand, it is expected that the PVD coating will mainly increase the wear resistance of the coating, improve the heat resistance of the coating, reduce the friction of the coating-chip friction pair or the coating-workpiece surface friction pair by adding trace elements, and reduce the The transfer of cutting heat to the tool is realized; on the other hand, the mechanical and chemical properties of the coating itself will be improved by refining the grains of the coating.