LÖTVERBUNDSTOFF ZUR VERWENDUNG IN EINEM WÄRMEAUSTAUSCHER SOWIE WÄREMAUSTAUSCHER

• Main Authors: SAKAMOTO, YOSHITSUGU, UCHIMURA, KATSUNORI, KAJIKAWA, SHUNJI, HASEGAEWA TSUYOSHI, UEDA, MASAMI, ISHIO, MASAAKI
• Format: Patent
• Language: German
• Published: 22.06.2006
• Subjects: BLASTING; CLADDING OR PLATING BY SOLDERING OR WELDING; CRANKCASE VENTILATING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; LUBRICATING INTERNAL COMBUSTION ENGINES; LUBRICATING OF MACHINES OR ENGINES IN GENERAL; MACHINE TOOLS; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; STEAM ENGINES; TRANSPORTING; WEAPONS; WELDING; WORKING BY LASER BEAM

The present invention provides a brazing material wherewith the corrosion resistance of brazing filler metal section can be enhanced in brazed structures that are brazed together with a copper-based brazing filler metal, and brazed structures for heat exchangers or the like which exhibit outstanding corrosion resistance in the brazing filler metal section. A brazing composite (1) in the present invention comprises a base material (11) formed of a iron/steel material such as stainless steel material, an Fe atom diffusion suppression layer (12) formed of nickel or a nickel alloy or the like having nickel as the main component thereof, and also, when necessary, a copper-based brazing filler metal layer (13) formed on the Fe atom diffusion suppression layer (12). A brazed structure of the present invention comprises a first member and a second member that is brazed together to the first member with a copper-based brazing filler metal. The first member has a base material formed of a iron/steel material such as stainless steel, and an Fe atom diffusion suppression layer laminated on that base material. The diffusion of Fe atoms in the base material to the molten brazing filler metal during brazing is suppressed by the Fe atom diffusion suppression layer, and the deterioration in corrosion resistance in the brazing filler metal section caused by the diffusion and penetration of Fe atoms is prevented.