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Compared with the development of foreign countries, although China has studied more in the above aspects, the level is quite different, and the gap in practical application is greater.
2.3 Current status and development trend of high energy plasma surface coating technology
The technology is to increase the surface physicochemical reaction to obtain a special performance coating. The core is to enhance and control the generation and function of cathodic arc plasma more effectively. The United States, Japan, and Germany have vigorously developed this technology. Plasma-enhanced electrochemical surface modification technology is currently an active research and development field in the world. For materials such as aluminum and titanium, the electrochemical treatment effect is enhanced by plasma dimming and discharging, and dense alumina is formed on the metal surface. And other oxide ceramic film layers, the substrate can have a very high performance surface, is the cutting-edge technology of advanced manufacturing technology, and has a very promising application prospect in the machining tool and die industry.
2.4 diamond film coating technology
Diamond has excellent physical properties, and a very thin diamond film is deposited on the surface of workpieces with complicated shapes such as tools, molds, drill bits, etc., which can improve the performance of the workpiece and meet the requirements of some special conditions. In recent years, due to the excellent performance of diamond film and wide application prospects, Japan, the United States, and Western Europe have carried out a lot of research work, and developed a variety of diamond coating process technology, which has set off a boom in diamond coating research at home and abroad. Especially in the key technologies such as improving the bonding strength between diamond coating and matrix, rapidly depositing diamond coating technology on a large area, and industrially producing coated diamond film equipment system.
Breakthroughs have been made. The United States, Sweden and other countries have launched diamond diamond cutting tools supply market, and China's technology has not yet reached a practical level, and it is urgent to develop and realize industrialization.
Current status and development trend of 2.5 multi-layer multi-layer composite coating technology
A single surface coating can not meet the harsh working conditions in surface engineering. Any surface treatment has its own advantages and disadvantages. Because of the performance advantages of different coating materials, a multi-layer composite coating is formed on the surface of the substrate (including The gradient layer of a gradual change has great significance. Foreign countries have carried out research on multi-layer multi-layer composite coating technology with single-layer coating thickness of nanometer and layer number of more than 100 layers. The prepared coating has high corrosion resistance, toughness and strength, and combination with matrix. The strength is also good, the surface roughness is low, which is beneficial to the processing of the direct precision high-speed machining of ten people. Foreign countries have been listed as major developments, and there will be new breakthroughs in the research and application of nano-scale fine coating materials. Because the composite coating technology has the functions of anti-wear, high temperature oxidation corrosion, heat insulation, etc., it can expand the range of use of coated products and prolong the service life. It is a technology that will develop rapidly in the next century. China has started research and achieved initial results, but there are still some problems to be solved.
2.6 Status and development trend of surface modification and coating process simulation and performance prediction
As an important part of surface engineering, surface modification and coating technology has penetrated into the traditional industrial and high-tech industrial sectors, which in turn promotes the further development of surface functional coating technology according to the requirements of the application. According to the requirements of use, it is an important research direction in the field to design the surface of the material, tailor the surface performance parameters to meet specific requirements, and further realize the structure, performance and prediction of the surface coating. Computer simulation studies on CVD, PVD and other surface modification methods have been carried out abroad, and simulations have been carried out for CVD processes. Macroscopic and microscopic multi-level models have been used to simulate and predict the various properties of the process and coating and the binding force of the substrate; Carburizing, nitriding workpieces, layering performance stress, etc., computer simulation, etc., people can better control and optimize the process. Our country’s research in this area has just been in the super-step phase.
3"10th Five-Year" goals and main research contents
3.1 goal
According to the development of surface functional coating technology at home and abroad, combined with the needs and status quo of the machinery industry, we have developed a number of advanced and applicable key functional coating technologies for national major engineering and major technical equipment research.
3.2 Main research contents
(1) New low-temperature vapor deposition technology and equipment research and development of new magnetron sputtering, ion plating, PCVD equipment and its composite equipment, and achieve automatic control of the process. strengthen
The research on film-forming and film-based bonding mechanism reduces the film forming temperature, optimizes the reaction process and process parameters, and synthesizes various high-quality coatings with various wear-resistance and corrosion resistance. Focus on solving the surface engineering technical problems that national security and pillar industries urgently need to solve, and strive to form innovative scientific and technological achievements, and promote technological advancement in general machinery, valves, cold-working molds, high-temperature molds and other industries.
(2) Research on nano-scale multi-layerless composite coating materials and process technology
Tracking the international advanced level, researching more than 50 layers of nano-scale composite coating technology and materials, including nano-scale multi-layer multi-component coating material reorganization, comprehensive design of structure, thickness, number of layers, and microstructure and preparation of coating materials Process technology research.
(3) Research and development of numerical simulation and optimization control of surface coating process and quality, focusing on process simulation and optimization of thermochemical surface modification process and PVD and CVD deposition techniques. Mathematical models and algorithms were established to develop a corresponding system software to guide and analyze the design of surface modification and coating processes, and to predict surface properties and service life.
(4) Diamond film coating technology
Develop large-area, fast, high-quality diamond film coating technology and coating tool industrialization technology research, with the coating quality is good, uniform and consistent performance is the research focus, improve the deposition rate of diamond coating, complete the design of the corresponding equipment , manufacturing, and the development of diamond film coated blades, carbide drills and other tools, to increase the life of 10 times, and used in automotive and other industries.
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