Metallic silicon and ferrosilicon are different things. The production process is similar, but the usage formula is different, and the product uses are also different. The difficult-to-control indicator in metallic silicon is the iron content, while ferrosilicon is relatively simple, with a single finger. In terms of raw materials, ferrosilicon can also be used as an alloying agent in steelmaking.
Adding a certain amount of silicon to steel can significantly improve the strength, hardness and elasticity of the steel, increase the magnetic permeability of the steel, and reduce the hysteresis loss of transformer steel.
It is widely used in low alloy structural steel, bonded steel, spring steel, bearing steel, heat-resistant steel and electrical silicon steel. It is often used to manufacture single crystal silicon or prepare non-ferrous metal alloys.
Thermal conductivity of steel: High thermal conductivity can reduce the heating degree of the metal on the surface of the mold, thereby reducing the thermal fatigue tendency of steel.
It is generally believed that the thermal conductivity of steel is related to the carbon content. When the carbon content is high, the thermal conductivity is low. When the carbon content is too low, the hardness and strength of the steel will decrease. Therefore, medium carbon steel is usually used as hot work mold in production.
Impact of the critical point of steel: Generally, the higher the critical point of the steel, the lower the thermal fatigue tendency of the steel. Therefore, the thermal fatigue resistance of the mesh is generally improved by adding alloy elements Cr, W, and Si to increase the critical point of the mesh.
Because the working temperature and load properties vary widely, and it is impossible for any kind of mold steel to have high thermal strength, wear resistance, fracture resistance, thermal fatigue resistance, etc. at the same time.
When selecting, we can only focus on the key performance requirements of the mold to ensure priority, and then select materials taking into account other properties.
