Formation and Application of Magnetic Gratings on Steel Plate by Electron and Laser Beam Irradiation

Abstract

Formation of magnetic gratings on steel plate by electron-beam and laser beam irradiation has been studied. Ferromagnetic carbon steels, ferromagnetic stainless steels and nonmagnetic austenitic stainless steels were used for the test samples. The gratings were magnetized in a D. C. magnetic field, and the profile of the leakage magnetic flux on the steel plate was measured. The changes of microstructure and mechanical hardness of the beam-irradiated portions were also investigated. The leakage flux profiles show the existence of remanent magnetization in the gratings. The steel with the gratings can be applied as a material of the magnetic scale at 300°C.