Heat treatment of mechanical parts processing
1. After quenching and tempering treatment, HRC50～55.
2. Medium carbon steel: High-frequency quenching for 45 or 40Cr parts, tempering at 350-370°C, HRC40-45.
3. The carburizing depth is 0.3mm.
4. Carry out high temperature aging treatment.
Technical requirements after precision machining
1. The parts after precision machining should not be placed directly on the ground, and necessary support and protection measures should be taken.
2. Defects such as rust and moth, bumps and scratches that affect performance, life or appearance are not allowed on the processed surface.
3. Rolling the precision-machined surface, there must be no peeling phenomenon after rolling.
4. There should be no scale on the surface of parts after heat treatment in the final process. There should be no annealing,