MULTILAYER-CLAD STAINLESS STEEL PLATE FOR SEPARATOR OF SOLID POLYMER TYPE FUEL CELL, THICK PLATE, MATERIAL THEREOF AND MANUFACTURING METHOD THEREFOR

• Main Authors: TARUYA YOSHIO, USHIO KUNIHIKO, SEKI AKIRA, OBA TAKEISA, KANBE SOSUKE, OGAWA KAZUHIRO, ISHIGURO TAKESHI, YAMAMOTO HIDEAKI, YAZAWA TAKEO
• Format: Patent
• Language: English
• Published: 27.10.2005
• Edition: 7
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MACHINE TOOLS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; PUNCHING METAL; ROLLING OF METAL; SOLDERING OR UNSOLDERING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WELDING; WORKING BY LASER BEAM

PROBLEM TO BE SOLVED: To provide a multilayer-clad stainless steel plate having an outer layer made of steel containing boron (B), which is optimal for a separator of a solid polymer type fuel cell. SOLUTION: (1) The multilayer-clad stainless steel plate for the separator of the solid polymer type fuel cell is formed by combining an inner layer made of stainless steel containing 0-0.3 mass% B, with the outer layer made of stainless steel containing 0.3-2.5 mass% B on one surface or both surfaces of the inner layer. (2) The method for manufacturing the multilayer-clad stainless steel plate for the separator of the solid polymer type fuel cell comprises the steps of: heating the above material for the clad steel plate to 1,000 to 1,200°C; rough-rolling it; subsequently hot-rolling it at a finishing temperature of 600°C or higher; and then cold-rolling it. COPYRIGHT: (C)2006,JPO&NCIPI