Method of manufacturing edged tool

Abstract

A method of manufacturing an edged tool on surfaces of which rusting and coloration hardly occur is provided. This method includes a plasma step which includes placing a metallic base having processed surfaces obtained by processing in a vacuum chamber, generating plasma in the vacuum chamber, and subjecting the metallic base to plasma treatment at a temperature of the metallic base adjusted to 280 to 325° C. to sharpen the processed surfaces to thereby obtain an edged tool precursor, and an oxidation step which includes reducing an internal temperature of the vacuum chamber to a specific temperature ranging from 100 to 225° C. after completion of generation of the plasma, and introducing an oxygen-containing gas into the vacuum chamber to form an oxide film on surfaces of the edged tool precursor.

Dependencies are inferred from the claim text.