一、前言生产取向硅钢采用高温加热,是取向硅钢生产史上一个划时代的贡献,在此以后,在大生产中取向硅钢才能稳定地获得高水平的磁性。但高温加热后的板坯晶粒长得异常粗大,有时还有晶界氧化,因而材质很脆,在热轧时容易产生边部裂纹(简称“边裂”)。由于取向硅钢的材质很脆,生产过程各个环节中的许多因素,都可能对边裂有重大 First, the preface Production oriented silicon steel with high temperature heating, is an epoch-making contribution to the history of oriented silicon steel production, after which, in the large-scale production of silicon steel in order to obtain a stable high level of magnetic. However, the slab grains after heating at high temperature are unusually coarse and sometimes grain boundaries are oxidized, so that the material is very brittle and edge cracks easily occur during hot rolling (referred to as “edge cracks”). As the orientation of silicon steel is very brittle, many factors in all aspects of the production process may have a significant edge crack