METAL MEMBER MANUFACTURING METHOD, INDENTER AND METAL MEMBER MANUFACTURING APPARATUS

摘要

Disclosed is a method for producing a metal member, which comprises a step of pressing a second portion of a metal material without pressing a first portion of the metal material, and a step of pressing the first portion without pressing the second portion. The metal material has a region for hole formation, in which a through hole is to be formed. The first portion and the second portion are contained in the region for hole formation.