Custom carbon steel castings manufacturers show you what should be paid attention to when carbon steel castings are heat treated
Custom carbon steel castings manufacturers tell you that carbon steel castings should pay attention to the following points during heat treatment:
1. When the furnace temperature rises to 650°C~800°C, whether the temperature rises slowly
Because during the heating process, especially for carbon steel castings with complex shapes, when the furnace temperature rises to 650°C~800°C, the temperature should be raised slowly or kept at this temperature for a period of time. The manufacturer of Custom carbon steel castings tells you that because carbon steel undergoes phase transformation in this temperature range, accompanied by volume changes, phase transformation stress is generated. If the temperature rises, it is easy to make the thin-walled part and the rear wall part of the casting, as well as between the surface layer and the central layer. The temperature difference increases, which increases the thermal stress of the casting and easily leads to cracking of the casting.
2. Is the holding time sufficient?
The manufacturer of Custom carbon steel castings tells you that in order to make the internal and external temperature of the casting consistent and to have enough time to transform the structure, the holding time of the rear wall casting should be longer than that of the thin wall casting.
3. The manufacturer of Custom carbon steel castings tells you that when carbon steel castings are annealed, they are generally cooled with the furnace.