Effect of magnetizer geometry on the spot induction heating process

Simulated and experimental analysis of spot induction heating process with different magnetizer geometries were carried out with the aim of investigating the magnetizer geometry on heating rate and temperature uniformity of AISI 1045 steel workpiece. The simulated temperature field was in good agreement with experimental temperature field on workpiece surface. According to the calculated results, the highest heating rate could be obtained when magnetizer width was 10 mm, length was 20 mm and height was greater than the critical saturation value (hsaturation). The uniformity of temperature distribution could be improved by increasing the magnetizer width but became worse by increasing the magnetizer length. Additionally, the variation of input current had no effect on the appearance position of the highest heating rate under different widths.