| 摘要 |
PROBLEM TO BE SOLVED: To contrive enhancement in production efficiency for enabling low cost production by conducting reevaluation of a production process, etc., as to a metallic product imparted with an excellent mechanical property by forging treatment. SOLUTION: The manufacturing is conducted through a process wherein a forging material is cast by melting a forging material to obtain a preform forging material, and the preform forging material is forged, and at this time, even if the size and shape of the metallic products are diversified, the preform forging materials 51, 52, 53 standardized by limiting to the small number, to the utmost, if possible one, or even in a plurality, without forming corresponding to the size and shape of the metallic products, are used, and forged to manufacture the metallic products. |
