摘要:
A heat insulating board of an induction heating apparatus disposed inside an induction heating coil and shielding a radiant heat from a heated material fed through the inside of the induction heating coil, comprising a cooling tube formed with high heat conductive monothilic refractory with a heat conductivity of 5 W/(m °C) or higher and a closed in the monothilic refractory, whereby deformation and damage resulting from heat can be reduced remarkably.
摘要:
In an induction heating apparatus including a heat resistant heat insulating board disposed inside of an induction heating coil for shielding the radiant heat from a heated material which passes through the inside of the induction heating coil in which the to-be-heated material is heated by an alternate magnetic field applied by the induction heating coil, scales formed on the surface of the heated material and falling onto the heat insulating board are stably blown off from the heat insulating board by injecting a gas at at least two different injection angles to the heat insulating board from at lest one of the inlet end and the outlet end of the induction heating coil.
摘要:
A transverse type induction heating device for heating a material to be rolled (1) by inductors (2, 3) to which power is supplied from an ac power supply (4), wherein the inductors (2, 3) are disposed on the plate-width center line of the material to be rolled (1) so that the iron core width, in the plate-width direction of the material to be rolled (1), of the inductors (2, 3) is made smaller than the plate-width of the material to be rolled (1), and the heating frequency of the ac power supply (4) is set so that a current penetration depth δ in the expression (1) satisfies the expression (2) when a current penetration depth is δ (m), the specific resistance of the material to be rolled (1) ρ (Ω - m), the magnetic permeability of the material (1) μ (H/m), the heating frequency of the ac power supply (4) f (Hz), a circle ratio π and the plate thickness of the material (1) tw (m). δ = {ρ/(μ · f · π)}1/2 -------(1) (tw/δ)