1. High Hardness and Outstanding Wear Resistance
PCBN composite inserts exhibit a microhardness of 2700–5000 HV, second only to diamond and significantly higher than silicon carbide and aluminum oxide. Their wear resistance is 50 times greater than that of carbide tools, 30 times greater than coated carbide tools, and 25 times greater than ceramic tools. This makes them particularly suitable for machining high-hardness workpieces, resulting in superior surface quality and greatly simplifying heat treatment processes.
2. Excellent Chemical Stability
PCBN tools demonstrate remarkable stability in environments reaching temperatures of 1200–1300°C, resisting acid and alkali reactions, making them ideal for machining ferrous metals.
3. Superior High-Temperature Stability
PCBN tools can withstand temperatures of 1400–1500°C, nearly double the heat resistance of diamond. They are perfect for high-speed machining of superalloys and hardened steels, with cutting speeds 4 to 6 times faster than carbide tools.
4. High Thermal Conductivity
With thermal conductivity second only to diamond, CBN significantly outperforms carbide. This enhanced heat transfer efficiency reduces the temperature in the cutting zone, thereby extending the tool’s lifespan.
5. Low Friction Coefficient
The friction coefficient between PCBN and various materials is significantly lower than that of carbide, decreasing as cutting speeds increase. This results in reduced cutting force and minimized chip adhesion.
Extensive Applications of PCBN Composite Inserts
The exceptional characteristics of PCBN make it the top choice for machining difficult materials, especially for high-speed precision cutting. Its application spans various industries, including automotive manufacturing, aerospace, and heavy machinery.
- Industry Distribution: The automotive industry accounts for 50.37%, heavy machinery for 20.74%, and pump manufacturing for 8.89%.
- Material Distribution: Quenched steel comprises 65%, while cast iron accounts for 28%.
- Machining Operations: Turning operations represent 60%, with shaping at 32.5%.
- Replacement Applications: 50% of PCBN usage is for replacing grinding, 30% for replacing carbide tools.
For example, since introducing PCBN inserts in 2005 for machining cast iron brake discs, Beijing West Industries has seen cutting speeds double those of ceramic tools, with tool life extending 3 to 4 times longer, dramatically enhancing production efficiency and reducing costs.
Targeted Selection and Formulation
PCBN tools are highly specialized, requiring different formulations based on machining materials and methods. The higher the CBN content, the greater the tool’s hardness, wear resistance, and thermal conductivity. Typically categorized into high, medium, and low CBN content, these inserts are designed to meet various machining needs.
- High Content (80%–95%): Ideal for cast iron, powder metallurgy, and superalloys.
- Medium Content (60%–80%): Suitable for heavy-duty machining of quenched steel.
- Low Content (40%–60%): Best for high-speed light-load continuous machining.
According to precision and surface quality requirements, CBN particles are available in coarse, medium, and fine sizes to fulfill diverse processing demands.
With its exceptional performance characteristics, Boreas' PCBN composite inserts stand out as the ideal choice for processing challenging materials. Choose Boreas for your PCBN needs and elevate your production efficiency while reducing costs. Experience the unparalleled quality and reliability of our products and join the growing number of satisfied customers who trust Boreas for their machining solutions. Let us help you achieve excellence in your operations—contact us today to learn more about our PCBN offerings!