Inoculants can promote graphitization, reduce the tendency of white mouth, improve the shape and distribution of graphite, increase the number of eutectic clusters, and refine the matrix structure. A short time (about 5-8 minutes) after gestation works well. It is mainly suitable for general elements or post-instantaneous gestation in various situations. The inoculant is widely used, and has the characteristics of eliminating white mouth, preventing spheroidization, long pouring time, high efficiency, long effect, uniform cross-sectional structure, and improved performance. The inoculant has a very close relationship with the gestational decline. The incubation time of silicon is very short, because it mainly plays a role in stimulating by stimulating the formation of autogenous nucleus. After long-term heat preservation at high temperatures, diffusion will attenuate concentration fluctuations and energy fluctuations, resulting in a gradual decrease in autonuclei. Earthworm is a good inoculant. It produces ionic bismuth carbide, which is relatively stable. In addition, its specific gravity is greater than that of calcium, its vapor pressure is also small, and its decay time can be prolonged. It is a promising inoculant. The aluminum, titanium, zirconium, and cerium-removing carbides can be used as a crystal nucleus and have a strong deoxidizing ability. Further deoxidizing the molten iron, reducing the combination of oxygen and calcium, creating favorable conditions for the combination of calcium and carbon, promoting the formation of calcium carbide, and protecting the calcium carbide for a long time. Iron alloys are generally used as: (1) a deoxidizer. In the steel making process, oxygen in the molten steel can be removed, and impurities such as sulfur and nitrogen in some iron alloys can also be removed. (2) Alloy additive. In order to improve the properties of the steel, alloying elements are added to the steel according to the composition requirements of the steel. (3) Inoculant. The addition of molten iron before casting can improve the crystal structure of the casting. In addition, it is used as a metal thermal reduction to produce other iron and non-ferrous metal reductants, as an alloying additive for non-ferrous alloys, and as a small amount for use in chemical and other industries.
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