An induction heating method for a metal strip is provided to heat a continuously conveyed metal strip using an induction heating device disposed at a first position on a pass line. The induction heating method includes a step of detecting a displacement from a predetermined datum line of a width direction center line of the metal strip at a second position on the pass line that is different from the first position, a step of computing an estimated displacement of the width direction center line of the metal strip at the first position by temporal and spatial extrapolation of the displacement based on a function expressing a time series of changes in the displacement, and a step of controlling a relative positional relationship between the induction heating device and the metal strip in a width direction of the metal strip based on the estimated displacement.

An induction heating method for a metal strip is provided to heat a continuously conveyed metal strip using an induction heating device disposed at a first position on a pass line. The induction heating method includes a step of detecting a displacement from a predetermined datum line of a width direction center line of the metal strip at a second position on the pass line that is different from the first position, a step of computing an estimated displacement of the width direction center line of the metal strip at the first position by temporal and spatial extrapolation of the displacement based on a function expressing a time series of changes in the displacement, and a step of controlling a relative positional relationship between the induction heating device and the metal strip in a width direction of the metal strip based on the estimated displacement.

A method for producing a hot-dip galvanized steel sheet includes supplying humidified gas to the soaking zone 12 in a manner such that: in passes in which the steel sheet moves upward, the humidified gas is supplied from first humidified gas supply ports 40A to 40E provided at positions higher by 1.0 m or more and 5.0 m or less than the centers of lower hearth rolls 54 and overlapping the steel sheet in the passes when viewed from the side of the soaking zone; and in passes in which the steel sheet moves downward, the humidified gas is supplied from second humidified gas supply ports 42A to 42E provided at positions lower by 1.0 m or more and 5.0 m or less than the centers of the upper hearth rolls 52 and overlapping the steel sheet in the passes when viewed from the side of the soaking zone.

A heating device and/or method to heat a slab, and in particular its edges, by electromagnetic induction, comprising including an electric coil and a magnetic concentrator associated with the electric coil.

A heating device and/or method to heat a slab, and in particular its edges, by electromagnetic induction, comprising including an electric coil and a magnetic concentrator associated with the electric coil.

To improve the formability of dual phase steels, the martensite phase is tempered. It may form a ferrite-carbide structure. The tempering step occurs after martensite has been formed in the dual phase steel. The tempering step can occur in a box annealing step or it can be performed in a continuous fashion, such as on a continuous annealing, continuous tempering heat treating, or continuous coating line. The tempering step can further comprise a temper rolling on a temper mill after the heating step.

To improve the formability of dual phase steels, the martensite phase is tempered. It may form a ferrite-carbide structure. The tempering step occurs after martensite has been formed in the dual phase steel. The tempering step can occur in a box annealing step or it can be performed in a continuous fashion, such as on a continuous annealing, continuous tempering heat treating, or continuous coating line. The tempering step can further comprise a temper rolling on a temper mill after the heating step.

The present invention, in some embodiments, is a method the includes obtaining a sheet of a non-ferrous alloys as feedstock having a first edge and a second edge, heating the feedstock using a transverse flux induction heating system to form a heat treated product and concomitant with the heating step, cooling at least one of the first edge and the second edge of the feedstock by cross-flowing at least one fluid across the at least one of the first edge and the second edge of the feedstock.

An apparatus and a method for rapidly heating cold-rolled strip steel (10). The apparatus for rapidly heating cold-rolled strip steel (10) comprises a heating zone, a soaking zone, and a cooling zone, and the heating zone is sequentially divided into a first heating section (1), a second heating section (2), a third heating section (3), and a fourth heating section (4) along a moving direction of the strip steel (10) to be heated, the first heating section (1) and the fourth heating section (4) being radiant heating sections, and the second heating section (2) and the third heating section (3) being inductive heating sections. The method for rapidly heating cold-rolled strip steel (10) uses the apparatus for rapidly heating cold-rolled strip steel (10) to heat the strip steel (10).

System and method for using fast response heaters to pre-heat metal before entering a metal treatment furnace, which may improve control over metal processing, especially in response to changes in material, mass flow rate, line speed, and/or desired treatment process. Fast response heaters may be used with control systems to adjust the output of the fast response heater based on operator inputs, direct or indirect sensing of process parameters, and/or the use of thermal models to quickly adjust fast response heater output while a metal treatment furnace remains at a constant temperature or slowly transitions into a new operating state. The resulting gains in process control result in higher quality products, reduced scrap, and increases in line speed and output.