What is the surface functional coating technology?

First, technology overview

Novel functional surface coating technology, including the technology of low temperature electroless coating surface and ultra deep surface modified technology, it is the use of physical, chemical or physical and chemical techniques to change the "materials and parts of the surface composition and organizational structure and its characteristics is maintain the characteristics inherent in a matrix material and also gives the properties of the surface, to adapt to a variety of technical and service to the special requirements of environment of the material, so it is the most active area of technology for manufacturing and material science, and is related to surface treatment and coating technology of cross disciplinary. Its biggest advantage is to very little energy and material consumption prepared substrate materials are difficult or even impossible to obtain the excellent performance of the surface of thin, so as to obtain the maximum economic benefit, it is a kind of high quality and efficiency of surface modified and coating technology.

High quality and efficiency of surface modification and coating technology the scope broad: such as thermochemical surface technology; physical vapor deposition; chemical vapor deposition; physical and chemical gas phase deposition technology, high-energy from body surface coating technology; diamond film; multi-component and multi-layer composite coating technology; surface modification and coating performance prediction and cutting technology; performance test and life evaluation and so on.

Novel low temperature chemical gas phase deposition technology introduced into the plasma enhancement technique, the temperature dropped to below 600 degrees, obtain new hard wear resistant coating process and coating process for the production of high strength and high performance, in high speed, heavy load, difficult processing field has its special role.

Super deep surface modification technology can be used in the vast majority of heat treatment and surface treatment, instead of a high-frequency quenching, carbonitriding, ion nitriding process, deeper layer, higher wear resistance, increasing product life, produce the functional changes of breakthrough.

Two, current situation and development trend at home and abroad

With the development of basic industries and high-tech products of high quality and efficient surface modification and coating technology of demand to the depth extension, in this field at home and abroad and the related disciplines and promote each other's situation in such as "thermo chemical surface modification, high energy plasma coated layer", "diamond film coating technology" and "surface modification and coating process simulation and performance prediction" and other aspects have breakthrough and progress.

1 present situation and development trend of surface modification technology of thermo chemical

In recent years, attention has been attached to the study of the technology of carburizing, carburizing and other technologies under the condition of controlled atmosphere and vacuum. But in our country the application is very little, the related technical research work also is not enough. Controlled atmosphere and vacuum carburizing carburizing technology is significantly shorten the production cycle, energy saving, time saving, also can improve the quality of the workpiece, no oxidation, no decarbonization to ensure parts surface corrosion resistance and fatigue resistance, and reduce the heat treatment after machining allowance and clean working hours.

At present, the research results of the carbon potential control and monitoring in the world have been applied to the practical production, and the computer is used for on-line dynamic control.

The present situation and development trend of 2.PVD, CVD and PCVD Technology

Various vapor deposition is a challenging research topic in the world, which is a famous research institution and university. At present the technology in information, computer, semiconductor, optical instruments, such as industry and electronic components, optoelectronic devices, solar cells, sensors and other manufacturing is widely used, fabricated in industrial machinery, hard and wear resistant coating, resistant to corrosion, thermal barrier coating and solid lubrication plating is more research and application, which the popularity of tin coated tools has caused a revolution in the field of cutting, diamond film, cubic boron nitride thin films is also very hot, and has to the utility of propulsion. On the basis of different PVD, CVD process, through the development and complex many new technology and equipment, such as IBAD, PCVD and hollow cathode multi arc ion composite coating device, ion injection and oil sputtering sputtering or evaporation composite device, plasma immersion ion implantation device and continue to be the technology to new heights. Compared with the development of foreign countries, although there are more research in the above aspects, but the level of a larger difference in the practical aspect of the larger gap.

3 current status and development trend of high energy plasma surface coating technology

The technique is to increase the surface physical and chemical reactions, and to obtain the special properties of the coating. The core of the coating machine is to enhance and control the production and function of the cathode arc plasma more effectively, and the technology of the United States, Japan and Germany have developed vigorously. Plasma enhanced electrochemical surface modification technology, is the international active research and development in the field, for aluminum, titanium and other materials, through the plasma adjustable light discharge method, enhanced electrochemical treatment effect, to generate dense alumina and other oxide ceramic coating on the metal surface, the substrate with high surface properties, is the leading technology in the advanced manufacturing technology, in processing machine tool and die industry also has a prospect of application.

4 diamond thin film coating technology

Diamond has excellent physical properties and the deposition in the surface of complex shaped tools, dies, drill, etc. a layer of thin diamond film, improve the use performance of the workpiece, and meet the needs of some special conditions. In recent years, due to the excellent properties of diamond films and extensive application prospect, Japan, the United States and Western Europe were a lot of research work, and developed a variety of diamond coating technology, in both at home and abroad set off diamond coatings on the boom. Especially in improving the diamond coating and the substrate bonding strength, large area rapid deposition of diamond coating technology, key technology of industrialization production of diamond film coating equipment system abroad has been made breakthrough progress, the United States, Sweden and other countries have been launched diamond metal cutting tools supply market, and the technology of our country haven't reached the practical level, there is an urgent need to develop and realize the industrialization.

Current situation and development trend of the technology of multi layer and multi layer composite coating of 5

Single surface coating can not meet the design of surface engineering in the harsh working conditions, any surface treatment has the different advantages and disadvantages, because the use of the merits of different coating materials and on the surface of a substrate formed of multi-component and multi-layer composite coating (including extremely gradual gradient layer) is of great significance. Has developed abroad for monolayer coating thickness for nanoscale, layers in the study of more than 100 layers of the multiple layer composite coating technology and coating prepared with high resistance to rot resistance, toughness and strength, and matrix bonding strength or, surface roughness is low, the straight fine - cut machining ten favorable. Foreign countries have been included in the main development, to the research and application of nano grade fine coating materials will have a new breakthrough in the field of. Because the composite coating technology has anti abrasion, high temperature oxidation corrosion, thermal insulation and other functions, can expand the scope of use of coated products, extend service life, is a technology in first Century will be the rapid development of technology. China has already started to study, and achieved initial results, but there are still some problems to be solved.

6 the present situation and development trend of surface modification and coating process simulation and performance prediction

Surface modification and coating technology as an important part of surface engineering, has penetrated into traditional industry of new and high technology industry sector, according to the requirements of the application in turn promote the further development of functional surface coating technology. According to the requirements of the user, on the surface of the material design, trim surface property parameters, so as to meet the specific requirements, and further to achieve the surface layer microstructure and properties and predictive coverage, has become an important research direction for the field. Abroad have been of CVD, PVD, other surface change method of computer simulation was carried out to investigate, for CVD process was simulated, and the the macroscopic and microcosmic model, process and coating properties and substrate binding force to simulate and forecast; of carburizing, nitriding workpiece infiltration layer performance stress, computer simulation and so on, people can better control and optimize the process. The research in this field in our country is just at such stage.