采用Thermecmaster-Z热模拟试验机对Si含量为3%的Hi-B钢进行两道次压缩试验,通过分析不同实验条件下的应力-应变曲线和金相组织,研究了硅钢在热轧过程中的静态软化行为。结果表明:硅钢的组织主要是铁素体和少量的奥氏体。在变形后的保温过程中,一方面铁素体发生静态回复和静态再结晶以消除加工硬化;另一方面弥散分布的奥氏体对铁素体晶粒有钉扎作用以阻碍铁素体晶粒长大。 Two-time compression tests were carried out on a Hi-B steel with Si content of 3% by Thermecmaster-Z thermal simulator. The stress-strain curves and microstructure of the Hi-B steel under different experimental conditions were studied. Static softening behavior. The results show that the microstructure of silicon steel is mainly ferrite and a small amount of austenite. In the deformation after the insulation process, on the one hand, ferrite static recovery and static recrystallization to eliminate work hardening; the other hand, the distribution of austenite ferrite grains have pinning effect to prevent ferrite Growing grains.