Converter steel introduction
Converter steel refers to steel that uses liquid pig iron as the raw material and blows high-pressure air or oxygen from the top, bottom, and sides of the converter into the molten pig iron. The impurities in the pig iron are oxidized and removed. The effects of nitrogen in steel on steel are mainly the following: nitrogen precipitates at the grain boundaries, causing the steel to appear blue and brittle; nitrogen combines with Ti or A1 in the steel to (TiN) or (AlN), weakening the grain boundary strength, The brittle zone of the steel changes, which is easy to cause cracks on the surface of the slab; the presence of nitrogen in the steel reduces the toughness, welding performance and toughness of the thermal stress zone of the steel, and increases the brittleness of the steel.