The development of high performance rare earth steel with special effects of rare earth elements is of great significances for the utilization of rare earth resources and technological progress of iron and steel in Baotou,while it is the key for developing rare earth steel to clear the quantitative behavior of rare earth in steel.In the paper,the behaviors and mechanisms of rare earth elements in steel are discussed from such aspects as their thermodynamics,nucleation of rare earth inclusions and mechanism of internal friction for rare earth.Moreover,the non destructive characterization methods of rare earth inclusions are introduced.
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