关键词: 抑制剂, 高磁感取向硅钢, 获得抑制剂法, AlN, 渗氮, 析出

Abstract: The current application and exploitation on production of low-temperature high magnetic induction grain-oriented silicon steel with acquired inhibitor method at both iron and steel enterprises and research institutions in the world are reviewed. The control techniques of inhibitors, which include the composition design for inherent inhibitors, nitriding method and process, and secondary recrystallization annealing, are thoroughly analyzed and proposed. It is indicated that the design ideas for inherent inhibitors are basically identical. The main inhibitor is AlN, the auxiliary inhibitor is sulfide, and a small amount of elements can also be as the auxiliary inhibitor, such as Sn, Sb, etc. However, the content of elements consisting of inhibitors has some difference. Nitriding with NH3 after decarburization has become the main method currently, but the most appropriate selection of nitriding method, which depends on the actual production conditions, is still not definite. Meanwhile, the corresponding control conditions of nitriding and decarburization annealing have obvious differences. And there is no difference in two kinds of heating program used for secondary recrystallization annealing, but the selected N2 content in the annealing atmosphere has some difference. Finally, the key problems on the control techniques of inhibitors are analyzed, and the further research directions are pointed out.

Key words: inhibitor, high magnetic induction grain-oriented silicon steel, acquired inhibitor method, AlN, nitriding, precipitation