| 摘要 |
PURPOSE:To prevent the production of the brittle parts at the penetration parts of both ends where cracks are produced by undercuts and bends with less number of welding by forming the both ends of the chipped-off part of the clad steel into two- stage shape in the joint undergoing one layer hand arc welding. CONSTITUTION:shelves 12 are provided to the both ends of the chipped part of the clad member 1 for the pressure vessel of chemical equipment, etc. so that they are made into two stages. As a result of this, the thickness requiring build-up is less at the both end parts than the central part and therefore if hand arc welding is done, no undercuts will be produced. Further, the penetration of the both end parts goes down to the base metal 2 owing to the shelves 12 and therefore the brittle parts 9 becomes only the portions approximately equal to the plate surface. It is equally well to provide one-layer weld zones 13 to the both end parts in place of the shelves 12. |
