| 摘要 |
PURPOSE:To contrive the improvement of connecting strength by holding a honeycomb core member in a cylindrical metal case and forming a fine recessed part, promoting the infiltration of a melted brazing material, in an internal surface of the cylindrical metal case. CONSTITUTION:A honeycomb core member 2 is held in a cylindrical metal case 6. The cylindrical metal case 6 forms over its internal surface total area a fine recessed part promoting the infiltration of a melted brazing material. When the honeycomb core member 2 is connected to the metal case 6, the melted brazing material is distributed to the peripheral surface total area of the honeycomb core member 2 by a capillary phenomenon in the fine recessed part. Thus, connecting strength can be improved. |
