METHOD FOR REPEATEDLY PROCESSING METAL

To provide a processing method by which a metal can have homogeneous ultra microstructure.SOLUTION: A processing method of the present invention includes: an X shaft marginal part forging step at which two X shaft marginal parts, that are provided on mutually opposite sides on the basis of a center of a hexahedron metal, of marginal parts formed in an X-axis direction, are pressurized, the hexahedron metal is processed into a hexagonal prism metal, and the hexagonal prism metal is restored to the hexahedron metal again; a Y shaft marginal part forging step at which two Y shaft marginal parts, that are provided on mutually opposite sides on the basis of a center of the hexahedron metal, of marginal parts formed in a Y-axis direction, are pressurized, the hexahedron metal is processed into a hexagonal prism metal, and the hexagonal prism metal is restored to the hexahedron metal again; and a Z shaft marginal part forging step at which two Z shaft marginal parts, that are provided on mutually opposite sides on the basis of a center of the hexahedron metal, of marginal parts formed in a Z-axis direction, are pressurized, the hexahedron metal is processed into a hexagonal prism metal, and the hexagonal prism metal is restored to the hexahedron metal again. Each step of forging the X shaft, Y shaft and Z shaft marginal parts step is performed twice respectively.SELECTED DRAWING: Figure 2 【課題】金属が均質な極微細組織を有することのできる加工方法を提供する。【解決手段】Ｘ軸方向に形成された縁部のうち六面体金属の中心を基準にして互いに反対側に設けられる２つのＸ軸縁部を加圧し、前記六面体金属を六角柱金属に加工し、前記六角柱金属を再び六面体金属に復元させるＸ軸縁部鍛造ステップと、Ｙ軸方向に形成された縁部のうち、前記六面体金属の中心を基準にして互いに反対側に設けられる２つのＹ軸縁部を加圧し、前記六面体金属を六角柱金属に加工し、前記六角柱金属を再び六面体金属に復元させるＹ軸縁部鍛造ステップと、Ｚ軸方向に形成された縁部のうち、前記六面体金属の中心を基準にして互いに反対側に設けられる２つのＺ軸縁部を加圧し、前記六面体金属を六角柱金属に加工し、前記六角柱金属を再び六面体金属に復元させるＺ軸縁部ステップを含み、前記Ｘ軸、前記Ｙ軸及び前記Ｚ軸縁部の各鍛造ステップはそれぞれ２回ずつ行われる。【選択図】図２