There is a very important process in the production process of cermet blades, because it directly affects the life and use effect of the blade, it is the passivation of the blade edge. Passivation treatment usually refers to a process after the blade is finely ground, the purpose is to make the cutting edge smooth and smooth, and prolong the life of the tool.
Because the blade edge is sharpened by the grinding wheel, although it cannot be observed by the naked eye, it can be observed by instruments that there are tiny chipping and serrations to varying degrees. In the process of high-speed cutting during production and processing, the small gap on the blade edge is easy to expand, which increases the wear and collapse of the blade.
The role of edge passivation:
1. Rounding of the cutting edge: remove the burrs on the cutting edge and achieve precise and consistent rounding.
2. The burrs on the cutting edge lead to wear of the blade, and the surface of the processed workpiece will also become rough. After passivation treatment, the cutting edge becomes very smooth, which greatly reduces chipping and improves the surface finish of the workpiece.
3. Evenly polish the tool groove to improve surface quality and cutting performance.
However, there is an exception in the production process of cermet finely ground blades, that is, the blades are not passivated after fine grinding. We call them sharp edge products, that is, passivation-free products.
Let’s take a look at the two pictures first to see the appearance of the passivation-free product-”sharp edge”, why it can not be passivated.
You can see that although no passivation treatment has been done, the cutting edge is very smooth and smooth, without chipping and jaggedness, which completely reaches the level that no passivation is required. There are many similar sharp edge products in our company’s products, and the model will have the letter F at the end, indicating that it is a sharp edge product without passivation.
For example: passivation product specification is TNGG160408R15M
The specification of the non-passive sharp edge is TNGG160408R15MF
Since the role of passivation is to improve life and surface quality, why are sharp-edged products produced?
The main purpose is to ensure better surface finish and brisk cutting effect in processing and production. It can effectively reduce cutting load and achieve extremely high surface effect when processing small parts and shaft products. Although the life of sharp edged products may be reduced compared to that of blunted products, sharp edges are ideal for demanding machining conditions.
Post time: Feb-08-2023
