The so-called continuous casting billet, often called continuous casting billet, is a solid billet produced by continuous casting billet and a semi-finished product. After hot rolling and cold rolling, continuous casting billet can be used as steel plate, steel wire and steel pipe in other industries. Continuous casting billets can be divided into square billets (bloom billets, square billets), rectangular billets, thin slab billets, medium slab billets and special-shaped billets according to cross sections, and the most common ones are square billets and slabs.

The inner arc is the inside of an arc, which you can understand as the inner surface of a circle.

If it is a surface crack, slow cooling measures should be taken at the entrance and exit of the crystallizer to minimize the composition of harmful elements such as sulfur and phosphorus.