Cubic Boron Nitride Thin Film Growth Technology I. Project Introduction Cubic Boron Nitride (C-BN) is a synthetic material that does not exist in nature. It has a zinc ore structure, its hardness (70 ~ 90GPa) second only to diamond. Because it also has a very small coefficient of friction (with stainless steel 0î€009), good thermal conductivity (13w/cmK), excellent chemical stability and high temperature oxidation resistance (greater than 1100°C), it is very suitable for the tool coating. Because it does not have strong affinity with iron and nickel black metal like diamond, C-BN thin film reinforced tools can be used for the processing of steel alloys. In addition, C-BN also has a very wide bandgap (6î€4eV), good doping (n-type, p-type), and has a wide range of application prospects in the field of high-temperature electronic devices. This technology uses vacuum vapor deposition (PVD, CVD) method, according to the special growth mechanism of C-BN film, using a unique deposition process to prepare high-quality C-BN film and coating.
2. Prospect Analysis C-BN film can be applied to the surface hardening of various tools, wear parts, and manufacturing of high-temperature semiconductor devices. In the international market, diamond films currently have a production value of hundreds of millions of dollars each year. The properties of cubic boron nitride are very similar to that of diamond, and some properties are superior to diamond. Therefore, C-BN film will have a very promising market prospect.
Third, cooperation methods Technology transfer, technical services.
Laser Surface Strengthening and Restoration Technology for Metal Molds and Metal Parts I. Project Introduction Laser surface hardening and repairing technology for metal molds is a high technology representing the international advanced level and development direction of materials surface engineering. This achievement was obtained in 1997 by the State Education Commission for scientific and technological progress. Awards and China Aviation Science and Technology Progress Award. The technical achievements mainly include the following features:
1. Strengthen only certain parts of the surface that need to be strengthened in the mold and repair the specific local area on the surface that needs to be repaired ("use hard on the point"), with good production efficiency and economic benefits;
2. Because it uses “non-contact†high-energy laser beam to irradiate the mold in the local area under normal atmospheric conditions to achieve surface hardening and repair of the mold, the mold and the workpiece are not deformed after strengthening and repair processing, and the shape and size of the workpiece Unequal geometrical, it can conveniently surface strengthen various special parts such as blind hole bottom, deep hole hole wall, etc. It is an efficient and flexible surface strengthening and repairing technology.
3, laser surface hardening die long life, good economic benefits: can be applied to a variety of iron-based alloys (carbon steel, alloy steel, cast iron), nickel-based alloys and other metal material molds and workpiece surface hardening and repair and significantly Improve service life.
Second, the prospects of analysis Machinery, metallurgy, light industry, electronics and other industries in the metal tool and die market is huge, according to incomplete statistics, such as the mechanical processing industry, the annual consumption of metal tooling value is five times the total value of various machine tools, and For example, in the metallurgical industry, only the consumption of hot rolling rolls is more than 300,000 tons per year. The value of hot rolling rolls accounts for more than 5% of the steel production cost. The heavy consumption of metal tooling not only directly increases production costs, but also results in frequent production stoppages due to the frequent replacement of tooling, resulting in greater economic losses. The failure of metal tooling and die is in fact scrapped due to the wear of the surface material on the surface layer, and the metal machining tool has a long processing cycle and high processing costs (especially for complex and complicated molds or large-scale tooling. Even millions of dollars). Therefore, it is undoubtedly an economically significant method to surface-strengthen specific parts of a metal tooling mold that are actually subjected to wear (“spent on the pointâ€) to significantly extend and increase the service life of the tooling. In addition, most of the tools and molds fail because of the very thin layer of material being worn out. Therefore, it is only necessary to repair the surface areas of the molds and key metal parts and repair them, and to actually withstand the mold surface during the repair process. The worn surface is replaced with a special high-abrasion material ("good steel is used on the blade"), and it can be turned into a waste, not only to restore the mold, but also to repair the surface of the new mold. “Using special high wear-resistant materials, the service life of the repaired molds will be greatly improved compared to the original molds, and the economic benefits are enormous (for example, repairing a large shaft of a power plant motor, including various preparation times, etc. will only take several days.) Time, but can create millions of dollars in economic benefits.)
Third, cooperation methods Technology transfer.
New Materials Cooperation Project
February 02 21:06:33, 2019
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