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金刚石刀具的有哪些类型及特点?

发布时间:2021-07-05 11:02:32 来源:http://www.jnskdj.com 作者:骏豪 浏览量:

① 天然金刚石刀具:天然金刚石作为切削刀具已有上百年的历史了,天然单晶金刚石刀具经过精细研磨,刃口能磨得极其锋利,刃口半径可达0.002μm,能实现超薄切削,可以加工出极高的工件精度和极低的表面粗糙度,是公认的、理想的和不能代替的超精密加工刀具。

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by high temperature and high pressure synthesis technology has been successfully developed, natural diamond tool has been replaced by man-made PCD in many occasions.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.

金刚石刀具的有哪些类型及特点?(图1)

PCD刀具无法磨出极其锋利的刃口,加工的工件表面质量也不如天然金刚石,现在工业中还不能方便地制造带有断屑槽的PCD刀片。因此,PCD只能用于有色金属和非金属的精切,很难达到超精密镜面切削。

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金刚石刀具:自从20世纪70年代末至80年代初,CVD金刚石技术在日本出现。CVD金刚石是指用化学气相沉积法(CVD)在异质基体(如硬质合金、陶瓷等)上合成金刚石膜,CVD金刚石具有与天然金刚石完全相同的结构和特性。

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.

CVD金刚石的性能与天然金刚石相比十分接近,兼有天然单晶金刚石和聚晶金刚石(PCD)的优点,在一定程度上又克服了它们的不足。

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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