稀土元素在钢中的应用国内早在50年代就已尝试。随着科学技术的发展,研讨稀土在液态和固态钢中的行为问题日趋迫切。为此,我们曾在5～10吨电炉上研究稀土元素在炉内和炉外(钢包内)以及浇注过程中同氧的化学反应;同时用放射性同位素 C_e~(141)来测定稀土在固态钢中的物相分配、夹杂物形成过程、夹杂物在钢锭中的分布以及夹杂物的成份等。这些试验,企图摸清稀土在液态和固态钢中行为的规律,以便服务于生产。 The application of rare earth elements in steel as early as 50 years have tried. With the development of science and technology, it is urgent to study the behavior of rare earth in liquid and solid steel. For this reason, we have studied the chemical reaction of rare earth elements with oxygen in the furnace and in the outside of the furnace (inside the ladle) and in the pouring process in 5 to 10 tons of electric furnace. Meanwhile, the radioactive isotope C_e ~ (141) In the phase distribution, the formation of inclusions, the distribution of inclusions in the ingot and the composition of inclusions. These experiments attempt to find out the law of behavior of rare earths in liquid and solid steel in order to serve the production.