23-07-2014 дата публикации
Номер: CN103934554A
Принадлежит:
The invention discloses a submerged-arc welding process for welding a steel plate with a thickness larger than 40mm without back gouging. According to the submerged-arc welding process, the steel plate produced through TMCP or microalloying serves as the base material; the shape of a groove is a double-Y-shaped arc chamfer, one end of the arc is perpendicular to a truncated edge, and the other end of the arc is tangent with a groove edge; the diameter of the matched welding wire is 3.0mm-5.0mm; welding parameters include that weld heat input of a first weld joint on the front surface is 15-25J/cm, weld heat input of a first weld joint on the back surface is 40-50J/cm under the conditions without back gouging, and vertical dislocation of truncated edges of two steel plates is not larger than 1.5mm; other procedures are performed according to the conventional submerged-arc welding mode. By means of the submerged-arc welding process, formation of the weld joints is good, no back gouging on ...
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