Abstract:

Nonmetal inclusion control has always been an important subject in clean steel production. In recent years，the focus of Mg application in steel has changed from the traditional modification of inclusions to the microalloying. This paper reviews the research status of Mg application in steel at home and abroad，represents the advantages of Mg from several aspects，such as cleanliness control，oxide metallurgy，solidification microstructure refinement，slab crack control，etc. The possible development fields and directions of magnesium clean steel are also analyzed and prospected.

Key words: clean steel, Mg treatment, inclusion, microstructure and properties, microalloying