The alloy cutter is prepared by a reasonable cutting edge, which can be partially achieved. In general, according to the requirements of the processing quality and tool life level, different hard cutter can use different cutting edge preparation type, edge shape and sharpness. The cutting edge is the intersection of the rake face and the flank face of the tool. By cutting the rake face and the flank face, a sharp cutting edge can be obtained. If the PVD coating is deposited directly on the sharp cutting edge, a high stress is generated inside the coating. Due to the influence of this high internal stress, the coating is easily broken and peeled off during cutting, thus reducing tool life.

 

     Alloy milling is to improve the wear resistance of the tool, and the heat generated by the cutting area and the tool base isolation. The quality and effectiveness of the coating depends on its ability to withstand and / or reduce the wear rate during the cutting process. It is necessary to perform a hardening (passivation) treatment on the cutting edge in order to make the coating more firmly attached to the cutting edge and to prevent the cutting edge from being damaged.

Alloy milling cutter metal bonding phase content is higher, then the higher the bending strength. When the binder content is the same, the strength of YG (WC-Co) alloy is higher than that of YT (WC-TiC-Co) alloy, and the strength decreases with the increase of TiC content. After the tool is re-ground, if it is not re-pass the edge of its processing, to restore to the initial state, can not fully play the full potential of repairing the tool. Alloy cutter in the selection of materials should pay attention to the heat resistance, because the tool in the cutting process will produce a lot of heat, especially in the cutting speed is high, the temperature will be high, so the tool material should have a good heat Sex.