Repair process of hydraulic cylinder

1. Bake the scratched part with oxygen-acetylene flame (master the temperature to avoid surface annealing), and bake out the oil on the surface of the permeating metal all the year round until there is no spark.
2. The scratched part shall be treated with an angle grinder with a grinding depth of more than 1mm, and the groove shall be polished along the guide rail, preferably dovetail groove. Drill holes at both ends of the scratch to deepen and change the stress condition.
3. Clean the surface with absorbent cotton dipped in acetone or anhydrous alcohol.
4. Apply metal repair materials to the scratched surface; The first layer should be thin, evenly and completely cover the scratch surface to ensure the best adhesion between the material and the metal surface, and then apply the material to the whole repair part and press repeatedly to ensure that the material is filled and reaches the required thickness, making it slightly higher than the surface of the guide rail.
5. It takes 24 hours for the material to fully achieve all properties at 24 ℃. In order to save time, the temperature can be increased by tungsten halide lamp. The curing time will be shortened by half for every 11 ℃ increase in temperature. The best curing temperature is 70 ℃.
6. After the material is solidified, use fine grindstone or scraper to repair the material higher than the surface of the guide rail, and the construction is completed.