In addition to improving the life of the tool products require reduce pollution cutting dry cutting as much as possible. Not completely cancel the cutting fluid, which contains only rust inhibitor without organics as far as possible, which can greatly reduce the cost of recycling.
Diversity and use of cutting tools, work status characteristics determine the select different tool coating. Turning and drilling, End Mills should consider the characteristics of its intermittent impact. The early development of the coating to the wear-resistant as the main focus, to improve hardness as the main indicators. The titanium nitride as the representative of such coatings having a higher coefficient of friction, the constant friction between the workpiece machining will produce a lot of heat.
To avoid overheating tool deformation affect the machining accuracy and prolong its life, typically use a cutting fluid. To solve the problems caused by the reduction or exemption of cutting fluid, tool coating, not only should the tool has a long life, and should have a self-lubricating function.
The DLC coatings appeared in shows some material machining advantages, but after years of research show that the internal stress of the DLC coating, poor thermal stability and black metal catalyst effect SP3 structure to SP2 shift three shortcomings, it currently only applied to the processing of non-ferrous metals, which limits its further application in machining.
However, recent studies show that, with SP2 structure consisting mainly of diamond-like coating hardness can also reach 20 ~ 40GPa, does not exist from the black metal catalyst effect, its low coefficient of friction have a good moisture resistance,can be used when cutting the coolant can also be used for dry cutting has increased exponentially, their life than the non-plated knife problem does not exist, the processing of steel material, thereby causing the coating company. Drill Bits, cutting tools manufacturers great interest. In time, this new DLC coating in cutting the field to get a wide range of applications.