Silicon carbon alloy, I believe everyone is no stranger to it. Its role in the cast iron industry is also very important, and it is of great significance for improving the quality and efficiency of cast iron. The important elements of silicon carbon alloy are silicon and carbon. Therefore, silicon and carbon play a role in the processing of cast iron. What role do the two play?
The influence of carbon and silicon on cast iron is not only related to their respective content, but also related to carbon equivalent. The effect of carbon equivalent on improving casting performance, reducing casting defects, and reducing waste: the size has a great influence on the fluidity of ductile iron, and increasing the carbon equivalent can increase the fluidity of ductile iron.
When the CE is close to 4.6% to 4.8%, the fluidity is better, which is conducive to pouring and feeding. The solubility in molten iron increases as the amount of Si in the molten iron increases, and decreases as the temperature of the molten iron decreases.
The relationship between the carbon equivalent and the size and distribution of shrinkage cavities and porosity: With the increase of CE, the volume of shrinkage cavities continues to increase.
Si is an element that strongly promotes the crystallization of iron and carbon in a stable system, and promotes the precipitation of high carbon phases in the primary crystal, eutectic and eutectoid transformations in the form of graphite. Si also changes the temperature and composition of each phase transition critical point in the iron-carbon alloy, and makes the crystallization process of the alloy have some more important characteristics different from the iron carbon binary alloy.
The influence of silicon and carbon on cast iron is also closely related to their content. The addition of silicon carbon alloy can improve the plasticity and toughness of cast iron, and play an important role in improving the processing efficiency of cast iron. Of course, in the process of using silicon carbon alloy, the amount of silicon and carbon should be controlled. After all, their different amounts have different effects on cast iron processing.