Diamond, as a kind of superhard cutting tool material, has been used in cutting for hundreds of years. In the…
Tool coating and wear process
The hardness of the cutter surface is enhanced by the hard coating on the surface of the cutter, which increases the life of the cutter in the high temperature. However, generally speaking, the coating must be thick to insulate the substrate from the heat, while the thick coating does not adhere well to a very sharp geometric structure. Tool makers are trying to design a thin, high-temperature coating.
Austenitic stainless steel has high ductility and a tendency to stick to cutting tools. The application of the coating can also inhibit adhesion wear, which occurs when the cutting material adheres to the cutting edge. Adhesion work piece material can pull out parts of cutting edges, resulting in surface finish and tool damage. The coating can provide the lubrication that restricts adhesion and abrasion; Higher cutting speed can also reduce adhesion wear mechanism.
Some austenitic stainless steel alloy contains abrasive hard inclusions, which increases the abrasion resistance and hard coating of cutting tools to prolong the tool life.
The strain or hardening tendency of alloy during machining. Groove wear can be described as a very local extreme friction and wear, it can apply the appropriate coating and other actions to reduce, the change of cutting depth, for example, to spread to the cutting edge wear area.
Tool makers focus on ongoing tooling development to find the balance between tool attributes to provide optimal performance in specific artifact materials. The carbon grade study seeks a balance between hardness and toughness, so the hardness of a tool is not very low, but it is difficult to resist deformation. Similarly, the sharp blade geometry is preferred, but not like the mechanical strength of the rounded corner. Therefore, the purpose of edge geometry development is to create tools to balance sharpness and as much intensity as possible.