Why CNC Milling Cutter Needs Passivation Treatment?

A. After tool grinding of conventional grinding wheel or diamond grinding wheel, there are some micro notch on the cutting edge (That is, tiny crack and microscopic gaps). In the process of cutting, the crack of tool edge is easy to expand, which will speed up the tool wear and damage.

B. The modern high speed machining and automation machine tool put forward higher requirements on the performance and stability of cutting tools , especially the CVD coated tools or blade. Before coating, they all need passivation treatment for cutting edge invariably, which is for the need of coating process, to ensure the robustness and the service life of the coating.

3. CNC machine tools and production line introduced from abroad have fully got passivation treatment. Many facts can show that the cutting edge passivation can effectively prolong tool life by 200% or more, which can greatly reduce the tool cost and bring huge economic benefits for users.

The importance of milling cutter after passivation is that: The cutting tools after passivation can improve the edge strength, the tool life and the stability of cutting process. The main factors influencing the cutting performance and life of tools, include cutting tool material, cutting tool geometry parameter, cutting tool structure, cutting parameter optimization, etc.

Through a lot of cutting tool edge passivation practice experience, we can learn that there are good cutting edge type and edge passivation quality, which also can do better in the machining of cutting tools.