1. Internal stress: The internal stress generated by mold steel during processing often leads to cracking. For example, uneven temperature or insufficient cooling will cause excessive stress in the mold steel, leading to cracking.
2. Overcooling: During the cooling process of mold steel, if the temperature is too low and the cooling time is too long, it is easy to cause cracking.
3. Improper heat treatment: Heat treatment is a very critical part of the mold steel manufacturing process. If the heat treatment method is incorrect, the temperature is not enough or even too high, the time is not enough, or the atmosphere or quality in the furnace is not good, it may cause mold steel to crack.
4. Improper welding: During the production process, mold steel needs to be welded and repaired. If the welding technology is not up to standard, welding defects, cracks, uneven coating, and other problems may also cause mold steel to crack.
5. Corrosion: During the use of mold steel, if it encounters corrosion, etching, and other problems, it is easy to cause metal or alloy peeling, resulting in surface cracking.

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