PURPOSE: To produce the surface coated metal excellent in corrosion resistance, oxidation resistance, etc., by forming a coated layer of an other kind of metal by a hot hydrostatic press method on the surface of a metallic blank material and elongating this material by hot working, then subjecting the material to softening annealing and cold working.
CONSTITUTION: The metallic blank material 1 (carbon steel, low-alloy steel, stainless steel, etc.) and the powder 2 of the other kind of the metal ('Hastelloy(R)', stellite, Ni-Cr alloy, etc.) are packed into a capsule 3 and the capsule is so hermetically sealed as to attain about 1×10-3Torr vacuum degree. The capsule 3 is then subjected to hot hydrostatic pressing to load a gaseous pressure at the solidus line temp. of the other kind of the metal or below to form the coated layer of the other kind of the metal on the metallic blank material 1. After the material is further elongated by hot rolling, the material is subjected to softening annealing and is elongated by cold working. The surface coated metal excellent in high-temp. corrosion resistance, wear resistance, etc., is obtd. in this way.
DENPO KOZO
MIYASAKA AKIHIRO
OGAWA HIROYUKI
