Deoxidizer. During the steel making process, oxygen in the molten steel is removed, and some iron alloys can also remove other impurities in the steel, such as sulfur and nitrogen.
Alloy additive. According to the composition requirements of steel, alloying elements are added to the steel to improve the performance of the steel.
Grow. Hot metal is added to the cast iron prior to casting to improve the crystal structure of the casting.
Reducing agent, producing other iron alloys and non-ferrous metal reducing agents by metal thermal reduction; alloying additives for non-ferrous metal alloys; also used in the chemical industry and other industries.
Steel, all steel is an iron alloy, which makes iron alloy a widely used, large number of alloys.
High-carbon textbooks also refer to certain high-carbon irons and all iron-containing alloys as iron alloys.