In-Depth Induction Heating of Large Steel Slabs by Means of a DC Saturating Field Produced by Superconducting Coils

Abstract

The feasibility of an innovative in-depth AC induction heating method for large steel slabs is investigated. Beside the AC field, which induces the heating currents, a large DC magnetic field is also applied, which brings the material to saturation. Due to the saturation, the permeability is reduced by orders of magnitude and the penetration depth is drastically increased, thus enabling much faster and more uniform heating. In order to produce the field needed for the saturation of common steel workpieces, lossless DC superconducting magnets need to be employed.A possible layout of an AC induction heater employing magnetic saturation (saturated AC induction heater) is discussed. The conceptual design of the superconducting magnet needed is carried out based on present state-of-the-art superconducting materials. The performance of the saturated AC induction heater is investigated numerically and compared with the case without magnetic saturation.

Oxide Scale Formation of Stainless Steels with Different Heating Methods – Effect of Hydrogen as Fuel

“…In this study, the induction simulation profile is based on the slab heating, in which the purpose would be to keep the difference between the surface and core temperatures small. [ 45 ] The heating time can be even shorter by accelerating the heating of the slab's surface, while the temperature difference to the core increases [ 45,46 ] and thus, the difference between oxide scales from induction and combustion heating could increase even more.…”

Modelling of Induction Heating of Steel Work Piece for Forging of Crankshaft

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