More and more stainless steel surfaces adopt PVD coating process. Let us introduce the process technology in detail below..

PVD is the abbreviation of Physical Vapor Deposition in English. It refers to the use of low-voltage and high-current arc discharge technology under vacuum conditions to evaporate the target material and ionize the evaporated substance and gas. Using the acceleration of the electric field, the evaporated substance and its reaction products are deposited on the workpiece.

PVD coating technology appeared in the late 1970s, and the prepared film has the advantages of high hardness, low friction coefficient, good wear resistance and chemical stability. Initially, the successful application in the field of high-speed steel tools attracted great attention from the manufacturing industries around the world. While developing high-performance and high-reliability coating equipment, they also carried out more in-depth coating in cemented carbide and ceramic tools. Layer application research. Compared with the CVD process, the PVD coating process has a low processing temperature, and has no effect on the bending strength of the tool material when it is below 600℃; the internal stress state of the film is compressive stress, which is more suitable for the coating of carbide precision and complex tools ; The PVD coating process has no adverse effects on the environment and conforms to the development direction of modern green manufacturing. At present, PVD coating technology has been widely used in the coating treatment of stainless steel, cemented carbide end mills, drills, step drills, oil hole drills, reamers, taps, indexable milling inserts, special-shaped tools, welding tools, etc.

PVD coating technology not only improves the bonding strength between the film and the tool matrix material, but the coating composition has also developed from the first generation of TiN to TiC, TiCN, ZrN, CrN, MoS2, TiAlN, TiAlCN, TiN-AlN, CNx, DLC and Multi-element composite coating such as ta-C.