1 deoxidizer. In the steel making process, the oxygen in the molten steel is removed, and some iron alloys can also remove other impurities such as sulfur and nitrogen in the steel. 2 alloy additives. According to the requirements of steel composition, alloying elements are added to the steel to improve the performance of the steel. 3 inoculants. Add molten iron to the cast iron before casting to improve the crystal structure of the casting. In addition, it is also used as a reducing agent for the production of other ferroalloys and non-ferrous metals by metal thermal reduction; an alloying additive for non-ferrous alloys; and a small amount for use in the chemical industry and other industries. 4 steel, all steel is a kind of iron alloy, which makes the iron alloy is the most widely used and largest alloy. In the high school textbook, some high carbon iron and all iron-containing alloys are all iron alloys.
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