New coating tool than with the international level of the industry

    New coating technology of Ti-Al-X-N is the use of vapor deposition method in a few microns high hardness, high wear resistance of the coated surface of high strength base refractory Ti-Al-X-N coating, so as to reduce the tool wear, prolong life, improve the cutting speed to. It is an important achievement of high-end CNC machine tools and basic manufacturing equipment of national major special project achieved.

    "New coating technology of Ti-Al-X-N breaking the monopoly of foreign enterprises in the high-end technology of cutting tool coating, improve the localization rate of high-grade coated cutting tools, automobile, aviation and other key users to improve production efficiency, the solid foundation to reduce the production cost." Die industry technology innovation strategic alliance person in charge Luo Baihui pointed out, break through the Zhuzhou diamond cutting tool made in coating technology key, make the tool cost automobile engine cylinder block certain key components is reduced by 30%, the typical user -- Chery automobile engine machining tool localization rate increased from 20% to 47%, the import substitution, meet has the great significance of key industries in urgent need of hand.

    China as a manufacturing power is an indisputable fact. But our country in cutting tool technology of NC cutting compared with foreign countries there is still a gap, especially in the basic research of advanced coating manufacturing and coating technology. The successful application of new Ti-Al-X-N coating technology, breaking the monopoly of foreign powerful enterprises in high-end tool field, and lay a solid foundation for the localization of improving tool rate, creating conditions for better meet demand in key industries, with significant economic and social benefits.

    The core technology of bearing: machine tool called "manufacturing machine". If the high-end CNC machine tools is the art of modern industrial civilization, so high-end cemented carbide precision tool is the art of diamonds, diamonds sparkle from the tool surface a few microns thick precision coating.

    Coated cutting tool with high surface hardness, good wear resistance, chemical stability, heat resistance, oxidation, the properties of low friction and thermal conductivity. The reason is the coating material as a chemical barrier and thermal barrier, reducing the spread between the tool and the workpiece and the chemical reaction, thereby reducing wear, the tool life increased by 3 ~ 10 times above, the cutting speed increase 20% ~ 100%. Can say, a thin layer of paint carrying the core technology of cutting tool.

     The coated cutting tool in cutting tool in the proportion has reached 80%. As foreign enterprises occupy a monopoly position in the high-end tool field, in machine tool of our country numerical control special, tool and its core coating technology is becoming more and more attention, on the coating technology breakthroughs are included in a number of research.      

     Catch up with the international advanced level of similar products

     The new path of coating technology Zhuzhou Diamond Corp independent research and development of Ti-Al-X-N is not everything is going smoothly. The early introduction of coating production line, line drilling only the production of ordinary Ti-N and Ti-Al-N coatings. Through digestion and absorption, researchers developed Ti-Al-N coating with nanometer structure, has better performance than the ordinary Ti-Al-N coating, but still can not meet the needs of the cutting tool industry development. In this situation, strain drill set up R & D team, with the construction of the special subject of precision tool innovation platform as an opportunity, develop new high performance coating focus on research work.

     After a lot of experiments, task group chose Ti-Al-X-N coating is optimal, the oxidation resistance and hardness than the Ti-Al-N coating with high, but compared to the cutting performance and Ti-Al-N did not significantly improve. In order to clarify the properties of the coating are counterproductive, R & D team will be the first new coating from the substrate is peeled grinding into powder by differential scanning calorimetry, evolution, spinodal decomposition process of coating at high temperature phase structure. Through unremitting efforts, group prepared the optimization of coating nanocomposite multilayer structure of nc-TiAlN/Si3N4.

     According to Jin Die Cutter networks understand, model Ti-Al-X-N coating technology has obtained 9 patents for invention patents and all. PVD coating hardness is higher than that of 40GPa, reached the superhardness effect. At 1100 ℃ in air oxidation after 10 hours, has not yet fully oxidation coating. In 1100 ℃ tempering, the hardness of the coating can still maintain more than 40GPa, and the substrate bonding strength more than 90N. CVD coating thickness of α -Al2O3 over the same period the independent development of up to 10 micron, coating adhesion strength more than 80N, machining of cast iron cutting speeds of up to 500 meters. Products by users, has reached or exceeded the international advanced level of similar products in the mold processing industry