High-performance coated knives have become the symbol of modern knives. At present, the proportion of coated knives in knives in developed countries has exceeded 80% and has been on the rise. Knife coating technology has become one of the key factors in upgrading the manufacturing technology. Metal nitride hard coating with high hardness and wear resistance, can effectively reduce all types of mechanical wear, chemical corrosion and high temperature oxidation, making the coating tool life significantly improved.

AlCrN coating is one of the best nitride coatings. Compared with the CrN coating, the addition of Al to form a ternary Cr-Al-N coating is greatly improved in terms of wear resistance and high temperature oxidation. The AlCrN coating formed after addition of Al has high hardness and Good chip removal mechanism and other characteristics, so under high load conditions showed significantly superior friction and wear characteristics, coating load significantly increased, which greatly broadened the service range of Cr-based PVD hard coating; compared to AlTiN Coating, Cr has a higher melting point than Ti, Cr instead of Ti AlCrN coating temperature oxidation temperature can be significantly improved, the friction coefficient is smaller, more chip evacuation, anti-adhesion, better toughness, More suitable for intermittent cutting, although the hardness slightly lower, but the overall performance is more excellent, AlCrN coating has become the most representative of the current PVD nitride coating. For today's manufacturing industries that promote high-speed cutting and hard cutting, it is necessary to develop new coatings that maintain high hardness, high wear resistance and high-temperature oxidation resistance under high-speed cutting conditions. AlCrN coating at 1000 ℃ hardness remains 27GPa, which is the current hardness of the nitride hardness optimum. Cr element is the main element to improve the hot corrosion resistance, Al element can promote the formation of stable Al2O3 film, so the AlCrN coating has both good corrosion resistance and high temperature oxidation resistance. Relative to other coatings, the AlCrN coating is widely used in cutting, bearings, gearboxes, bearings and other industries due to its high hardness, good abrasion resistance, high temperature oxidation resistance and excellent red hardness under the condition of 1100. However, Stamping, aluminum die-casting, high temperature alloy processing, wear parts and other fields.