PCBN Turning Insert

Extremely high hardness and wear resistance: Hardness can reach HV3000 and above, making it ideal for machining high-hardness materials and resulting in extremely long tool life.

Excellent thermal stability: Can withstand cutting temperatures above 1200°C, while diamond begins to graphitize above 700°C.

High chemical inertness: Low affinity with ferrous metals, reducing the likelihood of built-up edge formation and achieving better machined surfaces.

Good thermal conductivity: Helps to rapidly dissipate cutting heat, reducing workpiece thermal deformation and tool thermal damage.

PCBN turning insert provides excellent wear resistance, thermal stability, and high precision for machining hardened steels and cast iron. With extended tool life and superior surface finishes, these inserts perform well in both roughing and finishing operations at high speeds and temperatures.

Model	Picture	Features	Application
Welding Piece Type Yp-Chip Breaker		1. Negative chamfers provide excellent chipping resistance. 2. First-stage chipbreaker ensures chip breaking performance at small depths of cut. 3. Second-stage chipbreaker ensures chip breaking performance at large depths of cut.	RR - Finishing and roughing of new wheels This product offers high versatility and excellent chip breaking performance, suitable for machining various brands of train wheels.
Column Type Yz-Flat Plate		1. New generation pillar-type grades: Improved stability, longer service life, and a wider range of applications. 2. High-toughness carbide substrate: Excellent impact resistance during semi-finishing and rough machining. 3. Fully automatic vacuum welding process: Robust weld stability. 4. Pillar-type through-weld structure: Dual-sided usable for greater cost-effectiveness.	HF - Machining lightly worn train wheels Optimal chip breaking performance for wheel repair inserts.
Integral Ys-Flat Plate		1. A new generation of monolithic grades, offering improved stability, longer service life, and a wider range of applications. 2. The monolithic structure enables machining with large allowances or under unstable working conditions. 3. It replaces carbide and ceramic materials, enabling efficient machining of hardened steel and cast iron.	HM - Medium Wear Train Wheel Machining This wheel repair insert has the most versatile geometry.
Welding Piece Type Yp-Flat Plate		1. High-toughness alloy substrate 2. CBN base material with both wear resistance and chipping resistance 3. Fully automatic vacuum welding process 4. Simple and convenient blade angle management	HR - For machining severely worn train wheels Strongest geometry for wheel repair blades.

Suitable for high-speed and high-temperature machining of hardened steels, tool steels, cast irons, and superalloys. Ideal for both roughing and finishing operations in challenging materials that require exceptional wear resistance and thermal stability.

1. Mixing
First, micron- or nano-sized cubic boron nitride (CBN) powder is uniformly mixed with a precisely proportioned metal binder. This step is fundamental to ensuring the consistency and stability of the final product's performance.

2. Drying
The mixed slurry is dried to remove moisture or organic solvents, forming a uniform, loose powder mixture, ready for subsequent pressing.

3. Pressing
The dried powder mixture is loaded into a precision mold and pressed into a pre-defined blade blank using ultra-high-pressure equipment. This step determines the initial geometry and density of the product.

4. Sintering
This is the most critical step in the entire process. The pressed blade blank is placed in an ultra-high temperature and pressure apparatus and sintered under conditions approaching or exceeding the thermal stability limits of cubic boron nitride. During this process, the CBN grains are firmly bonded together by the binder, forming a dense, hard polycrystalline structure.

5. Grinding Process
The sintered insert blank has achieved ultra-high hardness, but its dimensions and surface finish do not yet meet usage requirements. At this stage, a diamond grinding wheel is used for precision grinding to obtain accurate geometry, cutting-edge shape, and extremely high surface finish.

6. PCBN Coating
For some high-end products, a thinner and harder PCBN or polycrystalline diamond coating is deposited on the finely ground PCBN substrate using processes such as chemical vapor deposition. This coating significantly improves the insert's wear resistance, impact resistance, and service life.

Welding YP Chipbreaker Processing Range

BHF Series: Small Depth of Cut (0.1-0.3mm) for Chipbreakers in Hardened Steel.

BHM Series: Large Depth of Cut (0.3-0.8mm) for Chipbreakers in Hardened Steel.
 

Column-Type YZ-Plate Processing Range

1. Suitable for semi-finishing and roughing.

2. Processing Materials: Hardened steel (HRC 50 and above), cast iron.

3. Primarily used in the automotive and general machinery industries. Typical components include air conditioning compressor parts, gears, and bearings.

Integrated YS-Plate Processing Range

1. Suitable for semi-finishing and roughing.

2. Processing Materials: Hardened steel (HRC 50 and above), cast iron.

3. Primarily used in the automotive and energy, and heavy industries. Typical components include brake discs, brake drums, rollers, and slewing bearings.

Welded-Plate Processing Range

1. Suitable for semi-finishing and finishing.

2. Processing Materials: Hardened steel (HRC 50 and above), cast iron, and powder metallurgy materials.

3. Primarily used in the automotive and general machinery industries. Typical components include gears, drive shafts, and auto parts.

PCBN turning insert is commonly used in industries that require machining of hard materials, such as aerospace, automotive, and mold manufacturing. These inserts are particularly effective in high-speed, high-precision turning of hardened steel, cast iron, and other superhard materials.

Column YZ-plate processing case - air conditioning compressor cylinder processing

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