In the process of developing high quality steel,rare earth elements are widely used and effects are signifi-cant.In this paper,the mechanisms of action and lack of research of rare earth elements in steel are summarized as well as application situations of rare earth elements in wear-resistant steel,H beam and corrosion-resistant steel are overviewed.The design thinking of determining additive amount of rare earth by scientifically applying the first principle of density func-tional theory and combining mismatch theory with thermodynamic calculations is proposed aiming at such problems as lack of researches for the theory of determining additive amount of rare earth as well as solid solution of rare earth and mecha-nisms of action of the rare earth at grain boundary in steel,which could provide the thinking and references for design and wide applications of rare earth steel alloy.
维普
万方数据