The physical properties of steel after adding rare earths can be greatly improved. It is understood that the addition of rare earths to steel can play a role in purification (deoxidation, desulfurization), modification and microalloying, and can greatly reduce the harmful effects of low melting point impurities. It cannot be completely replaced by calcium silicon treatment.

Therefore, adding rare earths to steel can generally increase the transverse impact toughness of steel plates and seamless pipes by about one time, and at the same time can improve the bending performance and corrosion resistance of steel, which is conducive to improving the hot workability of steel, improving laminar tearing and hydrogen. It is understood that if ordinary steel is bent, it may crack, but rare earth steel will not crack. For some wear-resistant steel and engineering machinery steels, this kind of steel has better wear resistance. There may be a problem after 100 times, but the rare earth steel will still be fine even after 200 times of grinding.