| 摘要 |
PURPOSE:To obtain a connecting part reduced in voids by a method wherein coated materials, which are piles around a corrugate plate, are heated at a temperature within a given range to weld the materials with each other and between the materials and a partitioning flange or the corrugate plate by fusion. CONSTITUTION:Coated materials 22, obtained by coating granular core materials 20 with the film of coating material 21 having a melting point lower than the melting points of the core material 20, a corrugate plate 1 and a partitioning flange 10, are piles amount the corrugate plate 1 established on the partitioning flange 10. Subsequently, the piled coated material 22 are heated at a temperature higher than the melting point of the coating material 21 and lower than the melting points of the core material 20, the corrugate plate 1 and the partitioning flange 10 to weld the coated materials with each other and between the coated materials 22 and the partitioning flange 10 as well as the corrugate plate 1 by fusion. In this case, coated materials 22 having different grain sizes are used by mixing them. According to this method, grains having smaller sizes enter spaces between grains having larger grain sizes whereby a joint reduced in voids can be obtained. |
