At present, the marine cylinder liner industry uses alloy inserts to process large size cylinder liners. 1 edge of the alloy cutting tools cannot complete one surface, 

and the replacement of new tool tips forms joint marks and dimensional instability, which makes it difficult for subsequent fine grinding. Under this case, PCBN cutting 

tools could replace the alloy inserts and complete the work very well, such as our IBN400 CNMN solid PCBN Inserts for the marine cylinder liner machining, the tool life 

could be increased at least 1 time, compared with the carbide inserts.

The marine diesel engine is the "heart" of the ship, and the cylinder liner and piston ring are the key components of the diesel engine, and its performance directly 

determines the performance of the diesel engine. With the inferior use of fuel oil and the high power of marine engines, only depends on the high alloying of cast iron 

materials is limited, and surface treatment and other methods are needed to further improve the performance. The pulling cylinder phenomenon is a very dangerous 

and common fault in the operation of diesel engines, which directly affects the maneuverability and safety of the ship.