The extensive use of cbn cutting tools depends on high-speed, high rigidity, high vibration resistance metal cutting machine tools, and high-strength new varieties of pcbn inserts

grades. The appropriate cutting parameters should be selected according to specific machining conditions to make it compatible with the material being processed "match”.

Case Hardened Steel is a steel that undergoes carburizing and quenching to improve surface hardness and wear resistance while maintaining proper strength and toughness at 

the core. The hardness of case hardened steel is between HRC58-62, which can be divided into 3 types:

1)    Low hardenability: Typical steel types such as 20 and 20Cr have low hardenability and core strength, and the critical diameter in water does not exceed 20 ~ 35mm. Only 

suitable for manufacturing wear-resistant parts with small impact load, such as small shafts, pinions, piston pins, etc.

2)    Medium hardenability: Typical steel types such as 20CrMnTi, etc., have higher hardenability, critical diameter in oil is about 25 ~ 60mm, good mechanical properties and process

properties, and are widely used in manufacturing to withstand high-speed medium-load, shock and wear-resistant parts, such as transmission gears, clutch shafts, etc. for automobiles

and tractors.

3)    High hardenability: Typical steel types such as 18Cr2Ni4WA, etc., whose critical diameter in oil is greater than 100mm, and has good toughness. It is mainly used to manufacture 

important wear parts with large cross sections and high loads, such as aircraft and tank crankshafts and gears.

LINKUT pcbn cutting tools such as tipped pcbn inserts CNGA1204-2S for turning transmission gears, the cutting efficiecny have been imporved about 3 times and the surface finish of 

the workpice aslo meets the high requirements of the customers.