Categories
Tungsten Carbide Drawing Die Repair
Tungsten carbide drawing die repair technology undoubtedly strengthens the life of the carbide wire drawing die and has good economic benefits. Get to know how to repair carbide drawing die and save your cost.
Nov 8th,2020
1412 Views
Tungsten Carbide Drawing Die Repair
According to statistics, the tungsten carbide drawing die consumption of China machinery processing industry alone is as high as five times the total price of machine every year. Large consumption of carbide drawing dies not only directly increases production costs, but also causes frequent shutdowns of a large number of production lines due to frequent drawing die replacement, which causes greater economic losses. The tungsten carbide drawing die repair technology undoubtedly strengthens the life of the carbide wire drawing die and has good economic benefits. It can be used to strengthen and repair the surface of various metal materials such as iron-based alloys and workpieces and greatly increase the service life.
Be sure to clarify the specific steps of tungsten carbide drawing die repair:
1. Cleaning: Simple cleaning to remove oil and impurities at the place that needs to be repaired, otherwise there will be poor power supply and sparks during the repair process.
2. Rolling rate: The rotation speed of the welding gun should be tightly arranged with the pulse output current to form fusion points on the patch material. The rotation speed should not be too fast, otherwise there will be a small amount of patch material peeling off and small pores after the repair and polishing.
3. Contact point of welding torch and the drawing die: the smaller the contact area between the welding torch and the repair material, the better the pressing, the greater the current density (the more concentrated the current), the greater the heat of the welding point, and the higher the degree of combination of the repair material it is good. The power data shown in the repair material shell is the power requirement when the φ5mm standard welding gun electrode rod is in contact with the plane repair material. The larger the contact area of the welding head with the same power is, the current is dispersed, and the repair effect is not ideal. On the contrary, if the contact area is too small, repair During the process, it is easy to cause melting and splashing of the repair material and uneven surface.
4. Posture and pressure: When repairing, the welding torch should be at 45 degrees to the drawing die surface, and a certain pressure should be applied to the welding torch. The pressure depends on the roughness of the defect surface. It is not smooth and has more impurities.
5. Complex cavity: Use precision power when repairing fine, multi-edge, and complex surfaces. Thin materials are better for multiple repairs. The normal state is suitable for large defects.
6. Oxidized surface repair:
Process: Clean up impurities--->Remove the oxide layer--->Fix the edges with low power--->Fill up--->Polish
1) Before repairing the oxide drawing die, the oxide layer must be removed with a power tool, and the repair material must be directly welded to the steel base material, otherwise there will be an oxide layer between the repair material and the base material, which will easily peel off.
2) Try to use low power and thin materials to repair the edge part, which can reduce and reduce the edge marks caused by the repairing heat.
7. After the repair point is polished, there are light protrusions on the outer ring. The reason is that the heat generated during the repair hardens the workpiece. The material with good quenching characteristics is especially obvious. The edge part is repaired with low power and thin materials to avoid this phenomenon (method (Refer to oxidation mold repair).
8. If repairing and polishing caused concave, the reason is that the hardness of the repairing material is lower than that of the base material. It can be avoided by selecting the repairing material with a hardness similar to the base material.
If you have any other question on the tungsten carbide drawing die repair, please feel free to contact info@maxcarbide.com
