With the development of modern technology and cutting technology, many tool materials have appeared, the tool developed by the high-speed steel cutting tools - carbide cutting tools - spit coated carbide cutting tools - Ceramic Knives - cubic boron nitride cutting tools. Wherein cubic boron nitride cutting tools used in 1970 cutting tool, and because of its good workability and high-speed cutting performance, making processing difficult materials with high hardness hand selection tool materials. Then tell us about the specific performance and processing advantages in the field of cubic boron nitride cutting tools.

　A cubic boron nitride cutting tool performance
(1) high hardness, good wear resistance: the hardness of cubic boron nitride cutting tools and diamond tools only this, collectively referred to as super-hard diamond tools and cutting tools. Because of its high hardness makes cubic boron nitride cutting tools have good abrasion resistance.
(2) having a high thermal stability: heat resistance up to 1400 ℃ ~ 1500 ℃, higher than the heat resistance of diamond (700 ℃ ~ 800 ℃) doubled tool material is in the highest heat resistance, it is processed superalloy materials.
(3) has good chemical stability: the iron-based material to 1200 ℃ ~ 1300 ℃ afford chemistry.
(4) good thermal conductivity: CBN thermal conductivity (79.54 W / m.k) second only to diamond (146.5 W / m.k), as the cutting speed, CBN has gradually increased thermal conductivity. This helps reduce the temperature of the cutting zone of reduced diffusion wear.
　　Second, the classification of cubic boron nitride cutting tools
Cubic boron nitride cutting tools into the overall PCBN cutting tools and welding cubic boron nitride cutting tools. Overall PCBN cutting tool is the whole body is a kind of grade - CBN, this intermediate blade without holes, are machine folder indexable tool, you need a specially configured arbor; two welding cubic boron nitride cutting tools is only part of it is the cutting edge of cubic boron nitride material substrate is a cemented carbide material. Such a center hole in the middle, which is equipped with the tool holder and carbide shank universal.
　　Third, cubic boron nitride cutting tools applications
With the continuous development of cutting technology, cubic boron nitride cutting tools are widely used in high hardness machining difficult materials.
(1) cubic boron nitride cutting tools can car instead of grinding, hard turning with high hardness difficult materials
Since the cubic boron nitride cutting tools with high hardness and wear resistance, red hardness. Therefore, the use of super-hard Valin overall PCBN tool can drive hard turning instead of grinding difficult materials with high hardness.
(2) high-speed cutting
With the development of modern technology, as part of the workpiece, such as auto parts brakes, brake drums belong to mass production, replaced by ordinary lathe CNC lathe cast brake discs, brake drums. Wherein the linear velocity of the CBN tool is not sensitive, high-speed machining the workpiece.
(3) dry cutting
CBN dry type cutting tool machining the workpiece, reduce environmental pollution. Use coated tool or ceramic cutting tools are required wet, iron is not easy to clean. Using cubic boron nitride cutting tools BN-K1 grades, not only a large margin cutting of high hardness cast iron, cutting fluid was not added, not only to ensure the health field, and iron recycling aspect.
　　Fourth, CBN tooling field
(1) due to its good processability, high hardness machinable cast iron, such as chilled cast iron, nickel hard cast iron, high chromium cast iron, high nickel chromium cast iron. High hardness cast iron is well known that there are inevitable during casting casting defects, casting defects face of cubic boron nitride cutting tools, in particular the overall PCBN tool not only do not need to be polished workpiece surface, and direct large margin turning and will not appear severe wear or chipping phenomenon.
(2) can be efficiently cutting hardened steel parts: site machining is the most common components. After high hardness parts after heat treatment, it has a good performance, widely used in transportation, wind power industry, heavy machinery, metallurgy industries. Based on the performance of different parts, select the appropriate cubic boron nitride cutting tools. When the small margin of more than 0.5mm, recommended for welding cubic boron nitride cutting tools. As large parts after heat treatment deformation and the balance is greater than 2mm, choose whole PCBN cutting tool, such as encountered intermittently do not have to worry about chipping or do not wear.
(3) can be processed gray cast iron parts: low hardness gray cast iron, with good shock absorption and reduce wear, it has a large parts market. Such as auto parts brakes, brake drums for the most typical of gray cast iron components. The main requirement of such machining the workpiece is the workpiece finish, parallelism and efficiency. Select the machining of such cubic boron nitride cutting tools, tool selection supra hardened steel cutting - parts.
(4) processable high temperature alloys, powder metallurgy parts: Currently, high-temperature alloys, powder metallurgy commonly used in the aerospace industries, the tool does not appear often wear problems in the processing of these parts, due to the unique porous properties of powder metallurgy, often leading The tool does not wear, cracks and so on edge. Cubic boron nitride cutting tools using high-temperature alloys, powder metallurgy parts, the margin can be completed in less than 0.3mm knife processing, high efficiency and low cost. .
　　V. Summary
With the wide application of cubic boron nitride cutting tools, so that high hardness is no longer difficult to process difficult materials, it also means that as long as the tool industry continues to follow the development of the times, developed a high-quality, high-performance cutting tool grades or a combination of tools to benefit for the company, and further promote the development of China's manufacturing industry.