| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for stably and considerably enhancing the durability at a joined interface when the temperature rising and falling are repeated in the brazing of a steel material with an aluminum material. SOLUTION: A brazing structure in which an Al-plated steel material and an aluminum material are brazed to each other by using a brazing filler metal of Al-Cu-Si-based alloy composition with a melting point of <550°C comprises, a steel basis material, an Al-Fe-Si-based alloy layer, and an Al basis material. The Al-Fe-Si-based alloy layer satisfies the condition (1) that the mean thickness of the Al-Fe-Si-based alloy layer is≤15μm, and preferably satisfies the condition (2) two layers of a phase A with high Cu concentration and a phase B with low Cu concentration coexist in the Al-Fe-Si-based alloy layer. COPYRIGHT: (C)2010,JPO&INPIT |
