中文摘要：

介绍了高氮钢结构特点的最新研究，高氮钢平衡相图的进展及其在高氮钢成分设计方面的应用；概括了氮在钢液中的溶解度公式和高氮钢熔炼过程中的关键问题；分析了氮在奥氏体钢、铁素体钢和双相不锈钢中的作用，即氮在不牺牲强度的同时不仅提高了钢的韧性，且改善了钢的抗腐蚀性能；并列举了一些典型的高氮钢的用途。

英文摘要：

The updated studies on the structures, progresses on the equilibrium phase diagrams of high nitrogen steels and their application in the designing of high nitrogen steels were introduced. The formulae of nitrogen solubility in different nitrogen bearing steels are summarized and the key points in high nitrogen steels manufacturing process were pointed out. The effects of nitrogen in austenite, ferrite and dual-phase stainless steels were discussed. Nitrogen can increase the toughness of steels without losing strength, while the corrosion resistance can be improved. The applications of some typical high nitrogen steel grades were illustrated.