摘要
本文阐述稀土元素对钢铁性能多方面的改善作用，介绍我国稀土及其合金生产和应用的快速发展，讨论稀土及其合金的放射性水平，并对稀土放射性进行安全性分析。
The multiple-improve actions of rare earth elements on the properties of iron and steel are described.The high-speed developments of the productions and applications of RE elements and their alloys in China are introduced.The radioactivity level of RE elements and their alloys are discussed.The radioactivity of RE elements is analysed about safety.
