Microstructure and Magnetic Properties of Non-oriented Electromagnetic Steel Sheets by Burnishing Method

Burnishing is a process in which a cylindrical or hemispherical tool made of a hard material is pressed against a workpiece with a rough cut surface to obtain a smooth surface. Compared to shot peening, the process stress is easier to control and more precise. Burnishing is usually used to improve surface roughness. Depending on the processing conditions, it is possible to affect the interior of the material and obtain an effect similar to shot peening. Electromagnetic steel sheet is a material that is easy to observe changes in crystal characteristics because it is close to pure iron in terms of material composition and has large crystal grains. When the crystals change, the magnetic properties also change. Therefore, it is a material that is easy to evaluate in various aspects. In this study, the changes that occur when electromagnetic steel sheets are processed by inclined burnishing was investigated.