Cubic boron nitride blade introduction
Cubic boron nitride blade is synthesized with cubic boron nitride powder and a small amount of binder under high temperature and high pressure by manual method. Its hardness is second only to diamond but much higher than other materials. Therefore, it is collectively referred to as super hard cutter with a diamond cutter.
Performance of Cubic boron nitride blade
It has a very high hardness, thermal stability, and chemical inertness. Its thermal stability is much higher than that of the diamond, iron series of metal elements have greater chemical stability. So it is often used in the cutting of ferrous metal. Cubic boron nitride blade is a major contribution to metal processing. Leading to revolutionary changes in cutting, cutting technology is the second leap. According to the structure, it is divided into welded composite cubic boron nitride blade and integral polycrystalline cubic boron nitride blade. The former is composed of various turning blades or other boring tools by welding the cubic boron nitride composite layer to the carbide substrate. While the latter is a whole polycrystalline structure blade.
Cubic boron nitride blade is mainly used in gray cast iron, wear-resistant cast iron, various high hardness materials. (such as cold and hot tool steel, high-speed steel, bearing steel, powder metallurgy steel, powder smelting metal, martensite stainless steel, high strength steel, high manganese steel, white cast iron, austenitic iron, etc.).
Application characteristics of welded composite cubic boron nitride blade
Welding composite cubic boron nitride tool is mainly used for finishing. Due to its poor toughness and impact resistance (brittle) is insufficient, can't afford a larger cutting force (related to the tool Angle size). In the intermittent process is easy to collapse a knife, when use turning depth (unilateral machining allowance) best under 0.2 mm is better. And high-speed cutting (can't choose low speed), the village of material has a good wear resistance, heat resistance, but require high grinding.
Application characteristics of integral cubic boron nitride blade
The integral cubic boron nitride sheet can be processed in a continuous way, and when sand inclusion or white mouth casting does not break the edge. In actual production and application, if the welding composite cubic boron nitride cutter breaks the edge. Or needs rough machining or finishing with a knife, the integral cubic boron nitride (PCBN) blade is often used.
