发布时间：2021-07-05 11:02:32 来源：http://www.jnskdj.com 作者：骏豪 浏览量：
① Natural diamond cutting tools: natural diamond has been used as a cutting tool for hundreds of years. After fine grinding, natural single crystal diamond cutting tools can be extremely sharp, and the edge radius can reach 0.002 μ m. It can realize ultra-thin cutting, and can process extremely high workpiece precision and extremely low surface roughness. It is recognized, ideal and irreplaceable ultra precision machining tool.
② PCD金刚石刀具：天然金刚石价格昂贵，金刚石广泛应用于切削加工的还是聚晶金刚石(PCD)，自20世纪70年代初，采用高温高压合成技术制备的聚晶金刚石(Polycrystauine diamond，简称PCD刀片研制成功以后，在很多场合下天然金刚石刀具已经被人造聚晶金刚石所代替。PCD原料来源丰富，其价格只有天然金刚石的几十分之一至十几分之一。
② PCD diamond tool: natural diamond is expensive, and polycrystalline diamond (PCD) is widely used in cutting. Since the early 1970s, polycrystalline diamond (PCD) blade prepared by high temperature and high pressure synthesis technology has been successfully developed, natural diamond tool has been replaced by man-made PCD in many occasions. PCD is rich in raw materials, and its price is only one tenth to one tenth of that of natural diamond.
PCD tool can't grind extremely sharp edge, and the surface quality of workpiece is not as good as natural diamond. Now it is not convenient to manufacture PCD blade with chip breaking groove in industry. Therefore, PCD can only be used for non-ferrous metal and non-metallic finish cutting, it is difficult to achieve ultra precision mirror cutting.
③ CVD diamond tools: CVD diamond technology has appeared in Japan since the late 1970s to the early 1980s. CVD diamond refers to the synthesis of diamond films on heterogeneous substrates (such as cemented carbide, ceramics, etc.) by chemical vapor deposition (CVD). CVD diamond has the same structure and characteristics as natural diamond.
The performance of CVD diamond is very close to that of natural diamond. It has the advantages of natural single crystal diamond and polycrystalline diamond (PCD), and overcomes their disadvantages to a certain extent.
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