TANDEM SUBMERGED ARC WELDING METHOD FOR HIGH Cr CSEF STEEL

摘要

Provided is a tandem submerged arc welding method for high Cr CSEF steel, wherein welding efficiency is excellent, slag peelability and the state of beads are good, and the occurrence of hot cracking in a welded metal can be suppressed. The tandem submerged arc welding method for high Cr CSEF steel is characterised in that welding is performed under conditions in which: the wire feed rate VL of a leading electrode is 45-90 g/min; the wire feed rate VT of a trailing electrode is 60-110 g/min; the welding rate v is 30-55 cm/min; and the deposited amount per unit length is 2.8-3.8 g/cm.