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The application of subcooling technology in cutting tool products evolves from the application of Mould Industry. Cooling treatment is the same as heat treatment. It has a great relationship with material properties, treatment temperature and treatment speed, and the effect of different treatment methods is obviously different. Cooling Technology is a technological method to process materials under-130℃, which can not only significantly improve the mechanical properties and service life of cutting tools, but also stabilize the size, it can improve uniformity and reduce deformation, and it is easy to operate without damaging workpieces, without pollution and with low cost, which is of great help to improve the quality of cutting tools. It is known that the tool vacuum heat treatment technology has a series of outstanding advantages: vacuum heat treatment has the effect of anti-oxidation. The surface has no oxidation, no decarburization, and has the effect of reduction and derusting, which saves the rough processing process of cutting tools, saves the consumption of expensive cutting tools, steels and raw and auxiliary materials, saves the processing time and reduces the cost of products; vacuum heat treatment has the functions of vacuum degassing and degreasing without the danger of hydrogen brittleness, which prevents the surface of the tool material from crisp, and improves the surface purity of the tool material, improve the fatigue strength, plasticity, toughness and corrosion resistance of the cutter, and improve the service life of the cutter; vacuum heat treatment has small quenching deformation, which can reduce the existence of correction stress of conventional quenching deformation, reduce the possibility of blade fracture in the process of using, the deformation of vacuum heat treatment blade is 1/2-1/10 of salt bath quenching, after quenching, generally can be refined grinding to the finished product without correction; the vacuum heat treatment process has good stability and repetition. Once the process is determined, As long as the process procedure is input, the heat treatment operation will run automatically. Avoid the fluctuation of cutter quality caused by the instability of conventional heat treatment process; vacuum heat treatment consumes less electricity, and the electric energy consumption is 80% of that of conventional heat treatment. The production cost is low, but the one-time investment cost is high; vacuum heat treatment is safe to operate, with high degree of automation, good working environment, pollution-free and pollution-free, which meets the requirements of clean production and sustainable development of industrial enterprises in China.
