Abstract: The present invention is a magnetic flux controlling device in the form of a passive inductor which improves heat pattern control for induction heating of objects such as thin, flat bodies. The device comprises a magnetic core and at least one electrical conductor that together do not form a closed electrical loop. The device is located on the opposite side of the object to be heated from the induction coil and may be adjusted along the axis of the induction coil to manipulate the heat pattern in different zones of the part.

Abstract: A magnetic flux guide for improvement of continuous induction tube welding process is provided having a magnetic body made from one or several plates of soft magnetic composite (magnetodielectric material) that has permeability of at least 15, saturation flux density greater than about 0.2 T and service temperature of at least 180° C. The device also comprises internal channels for water or gas cooling or one or two water-cooled plates, which are located in the middle of the magnetic body, on one side or both sides of the body. The device preferably has a fixture for its positioning above the edges of the welding tube or profile. The device may be incorporated into the welding coil, which provides to the device mechanical support and cooling.