一、前言 钢中应用稀土元素处理,以改善钢的性能,已在不少钢种中取得了显著效果。稀土在钢中的作用机理,多注重于稀土净化钢液、变质夹杂方面的研究,而对稀土在钢中的合金化作用研究较少。随着冶炼技术的发展,如喷射冶金的发展,钢中硫含量可降到很低。由于硫的降低,钢的性能有了一定的改善。在这种情况下,是否还有必要用稀土处理,为此,我们研究了微量稀土在钢 First, the introduction of rare earth elements in steel processing, to improve the performance of steel, steel has been achieved in many significant results. The mechanism of rare earth in steel focuses more on the purification of molten steel rare earth, metamorphic inclusions research, and rare earth alloying in steel less. With the development of smelting technology, such as the development of jet metallurgy, the sulfur content in steel can be reduced to a very low level. Due to the reduction of sulfur, the performance of steel has been improved to some extent. In this case, is it still necessary to use rare earth treatment, for which we have studied the trace rare earth in steel