The use of chemical method to make a variety of brazing carbide cutting tool on the head off, you can recover carbide scrap head, so that the re-welding of the new carbide rods re-use.
In addition to copper preparation: chromic anhydride (Cr2O3) (300 ~ 350) g / L, phosphoric acid (H3PO4) (70 ~ 85) g / L, the balance of water.
Method: kerosene will waste the brazing of the tool soak 1h or so, the dirt on the tool clean. In addition to the oil cut into the tank, into the tank containing copper in the tank and heated to (70 ~ 80) ℃ or so, after two or three days after the removal, then the carbide rod on the knife with the knife body from the body. Soak the length of time, depending on the size of the tool, such as different treatment. Remove the arbor and the blade, put in a cold water tank to clean the chromic anhydride, the arbor can continue to use the welding head.

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