| 摘要 |
PURPOSE:To improve the anticorrosion property of welded parts, by a method wherein a covered layer is formed by flame spraying of equal component metal with blazing material of a clad layer to the part from which bead is cut at the weld part of weld tube. CONSTITUTION:Since base material 2 is exposed, blazing material 3 being deprived at the cut part 7 from which bean 6 of the weld part 5 is cut, flame spraying covered layer 8 is formed at the cut part 7 and its vicinity by flame spraying equal component metal with blazing material 3 by a flame spraying gun. Because the layer 8 is composed of equal components with the blazing material, the difference in potential will not occur between the blazing material, and because flame spraying metal of the layer 8 is cooled in a short time, there is no chance of exfoliation of the blazing material, preferably the flame spraying metal laminates on the blazing material 3, and makes equal width with the blazing material 3 of another parts. When a core is formed, the blazing material of the layer 8 contributes the connection at the time of blazing tube and plate, and improveds the anticorrosion property. |
