The surface of the wire pulled out by the diamond wire drawing die has different degrees of oxidation.

The surface of the wire pulled out by the diamond wire drawing die has different degrees of oxidation.

What is the reason for the different degrees of oxidation on the surface of the wire pulled out by the diamond wire drawing die?

The temperature of the cooling water in the sealed chamber is too high, exceeding 40 ° C, so that the sealed chamber can not achieve the required cooling effect on the wire, resulting in the wire temperature is still very high after annealing, and the oxygen in the air is oxidized at high temperature.

The saponification liquid content of the coolant in the sealed chamber is not enough, which will increase the friction force between the wire and the guide wheel, and then make the wire temperature rise again, resulting in the oxidation of the surface of the wire.

The water pressure and water quantity of the cooling water in the sealing chamber are not enough, so that the wire can not achieve satisfactory cooling effect.

Solution: Diamond wire drawing die often check whether the equipment of cooling circulating water is operating normally, and whether the cooling effect is normal; Substances that can increase the concentration of saponification liquid are added at a certain interval in the sealed chamber, so that the content of saponification liquid in the cooling water can be changed to ensure that the wires can operate normally on the guide wheel; Regularly check whether the water pressure of the circulating water is normal, and constantly change the pressure and water volume of the cooling water entering the sealed chamber according to the change of water pressure during production.