| 摘要 |
PURPOSE:To reduce and dissolve the thermal deterioration of the weld zone and the heat-affected zone, by sectioning the welding margin of the thick metal to be welded, into suitable small areas, in the direction of its thickness, using the backing metals of suitable shape, and by respectively carrying out the welding of each small area. CONSTITUTION:For instance, on the purpose to make a small area S1 at the middle portion of the welding margin between the thick metals 10, 10, the backing metals 3, 3, of T-type section are attached from both sides, and the steel wire 4 is inserted into thus formed small area S1, and then, the well-known electroslag welding is carried out. As a result of this welding, the weld zone 11a of a small portion is formed at first. Then, the backing metals 2, 2, similar to the conventional method are attached for sealing from both sides of the weld zone 11a so as to form small areas S2, S2; and the steel wires 4, 4, are respectively inserted into these small areas S2, S2; after that, the electroslag welding is similarly carried out to form the weld zones 11b, 11b. The slag on the weld zone generating from the welding at each small area, is molten while the next weld zone is being formed, so that it is unnecessary to peel off this slag. |
