High-efficiency reducing furnace electrode repairing method
A repair method and reduction furnace technology, applied in the direction of pressure inorganic powder coating, etc., can solve the problems of insufficient electrode strength performance, reduced production efficiency of electrodes, and rebound and loss of particles, so as to achieve unlimited thickness and shape, reduce Subsequent processing amount, effect of low roughness
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Embodiment 1
[0037] The electrode to be repaired in this embodiment is a pure copper electrode, figure 1 In order to damage the electrode to be repaired, the repair method of the electrode comprises the following steps:
[0038] (1) Clean up the damaged part of the damaged electrode: Use 180#, 320#, 600# SiC sandpaper to polish the damaged electrode until it is bright and the wear marks are uniform;
[0039] (2) Use a specific fixture to fix the damaged electrode and cover it appropriately, and try to expose only the repaired area before starting the repair;
[0040] (3) Use the PS-1000 aerodynamic spraying system of Japan Plasma Corporation, after installing the Laval nozzle, use compressed nitrogen gas as the working carrier gas, and the working pressure is 6MPa; the raw material for spraying is copper powder, and the particle size of the powder is 20-35μm; the spray gun gun The distance between the mouth and the electrode surface is 40cm, the copper powder deposition is controlled at 1...
Embodiment 2
[0043] The electrode to be repaired in this embodiment is a pure copper electrode with a silver coating, Figure 4 In order to damage the electrode to be repaired, the repair method of the electrode comprises the following steps:
[0044] (1) Clean up the damaged part of the damaged electrode: Use 180#, 320#, 600# SiC sandpaper to polish the damaged electrode until it is bright and the wear marks are uniform;
[0045] (2) Use a specific fixture to fix the damaged electrode and cover it appropriately, and try to expose only the repaired area before starting the repair;
[0046] (3) Use the PS-1000 aerodynamic spraying system of Japan Plasma Corporation, after installing the Laval nozzle, use compressed nitrogen gas as the working carrier gas, and the working pressure is 6MPa; the raw material for spraying is copper powder, and the particle size of the powder is 20-35μm; the spray gun gun The distance between the mouth and the electrode surface is 40cm, the copper powder depositi...
Embodiment 3
[0064] Test the bonding strength between the electrode matrix and the sprayed layer after repairing by the repairing methods described in Examples 1-2 and Comparative Examples 1-6. The test method is based on GB / T 8642 Thermal Spraying-Tensile Bonding Strength. The test results See Table 1.
[0065] Table 1
[0066]
[0067]
[0068] It can be seen from Table 1 that the temperature of the carrier gas has a great influence on the bonding strength after repair. For copper and silver, a coating with a bonding strength greater than 60Mpa can be produced at a temperature of 250-350°C.
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