1 the CVD technology development in our country
CVD coating technology since the early 1970 s research in China, due to the technology specificity is stronger, the domestic research unit is not much. In the mid - eighty - s, China has reached practical level of CVD coating technology development, technology level and international level at that time, but develop very slowly over the next decade (similar to research status abroad); In the late ninety s, China began to MT - CVD technology research and development work, MT - CVD technology and equipment research and development is expected to be basically completed in 2001 years, according to the research objectives, process technology and equipment to reach the international advanced level; PCVD technology research in China started in the early ninety s, PCVD technology is mainly used for mould coatings, current application in the field of cutting tools are very limited. In general, the overall development of CVD technology domestic level and international level gap is not big, for MT - CVD technology development success, China's overall level in the field of cutting tools CVD coating will be basic in sync with the international advanced level.
2 the PVD technology development in our country
PVD coating technology research and development work in China began in the early eighty s, the mid - eighty - developed small and medium sized hollow cathode ion coating machine, TiN coating technology and develop the high speed steel tools. During this time, because of cutting tool coating market prospects look good, there are seven domestic large factory has large PVD coating equipment introduced from abroad (mainly high speed steel TiN coating process). Technology and equipment introduced to mobilize the PVD technology development boom, the domestic many scientific research units and each large vacuum equipment factory have launched the large-scale development of ion coating machine work, and in the early ninety s to develop a variety of PVD coating equipment. But because most of the equipment performance is not high, can't guarantee the quality of coating, and the expected market benefit, so most enterprises for PVD coating technology for further in-depth study, result in nearly a decade of domestic PVD coating technology development. Although domestic success at the end of the ninety s developed the carbide TiN, TiCN - TiN multivariate composite coating process technology and practical level, CNx coating technology research and development is also a major breakthrough, but compared with the level of international development, tool PVD coating technology in China is still backward ten years or so. Current tool PVD coating technology abroad has developed to the fourth generation, and domestic is in its second generation, level, and still is given priority to with single-layer TiN coating.
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