Causes of Excessive Carbon Content in Steel Castings
Steel castings refer to parts made of cast steel, which have similar properties to cast iron but better strength than cast iron. What is the reason for its excessive carbon content?
1. The design of the gating system in the setting of the gating system for the reducer steel casting is unreasonable. This leads to a higher likelihood of carbon diffusion into the casting from the thermal decomposition products of the casting model, which leads to carburization and carburization.
2. The casting conditions of the reducer steel casting are unreasonable. For example, if the pouring process is too long, the pouring temperature of molten steel will decrease, and the molten steel will solidify slowly, resulting in the prolongation of the action time of the thermal decomposition products and patterns of molten steel, increasing the carburization and carbon deposition of steel castings and reducers.
3. The permeability of casting coating and molding sand becomes poor. This also provides conditions for carburizing and carburizing.
In order to prevent the casting in contact with electric charge from being burnt out, it is recommended to take the following measures: When the contact point is not fully in contact with the surface of the steel casting, the current should not be turned on, and only when the current has been turned off should it be turned on. And use sufficiently clean and suitable contacts. The magnetic yoke method shall be used for machining smooth surfaces.
The surface of steel castings is relatively rough, which is not conducive to acoustic coupling, and has high surface hardness, making it difficult to polish.
I hope the above content is helpful to you.