| 摘要 |
PROBLEM TO BE SOLVED: To provide a processing method for steel material in which mechanical property and corrosion resistance of steel material are improved and residual stress is reduced.SOLUTION: There is provided steel material comprising a plurality of ferrite crystals grains. In a grain boundary formed along one direction out of grain boundaries of the ferrite crystals grains, an iron rich phase having a layer shape is formed. There is provide a material processing method and material processing device comprising: a heating step and heating device 6 in which steel material comprising a plurality of ferrite crystals grains is heated; a magnetic field application step and magnetic field application device 1,5 applying magnetic field to a heated part during the heating step; an energizing step and energizing device 3 applying electric field to the heated part in direction crossing with an application direction of the magnetic field during the heating step; a change measurement step and change measurement device 2 measuring change in steel material generated by the magnetic field and the electric field. There is provided a material processing method in which, at a position where an application direction of the magnetic field crosses with an application direction of the electric field, the magnetic field application device 1 and the energizing device 3 are arranged.SELECTED DRAWING: Figure 1 |
