Device for demagnetizing elongated components and method for demagnetizing such components

A device for demagnetizing a ferromagnetic, elongated component of any length having a uniform profile having a longitudinal axis which has an accessible surface on one side along its length, wherein the device comprises a rod-shaped, ferromagnetic core having a circumferential shell surface which is closed off by a front end face and a rear end face, wherein these end faces are aligned facing away from each other and wherein at least one coil is wrapped around the shell surface, which coil is connected at its ends to a current source which can generate an alternating current, whereby a magnetic alternating flux is induced in the ferromagnetic core, which flux enters and exits at the two end faces and in the non-coiled region of the shell surface, wherein a coil is wrapped around the shell surface of the ferromagnetic core, which coil is connected at its ends to a current source which can generate a direct current for superimposing the magnetic alternating flux with a thereby induced magnetic unidirectional flux through the ferromagnetic core, which enters and exits at the two end faces.