| 摘要 |
PURPOSE:To maintain an adequate cooling rate in the section where mass is large of members having ununiform mass and high sensitivity to cracking along the peripheral weld line and to avert a welding defect in the stage of welding said members by starting welding from the section where the mass is large and rewelding said section in the final. CONSTITUTION:Welding is started from the section of the weld line corresponding to the region where the mass of members having ununiform mass around the weld line is large along the weld line made of materials such as high-carbon steels or the like having high sensitivity to cracking. The above-described section is again welded in the end welded along said peripheral weld line. The above-described section is welded double by the above-mentioned method, by which the heat input is increased only in said section and the cooling rate is adequately controlled. The welding defect is thus averted. |
