Welding method of crack arrest steel and application thereof

• Main Authors: LI RENGUI, QIU FUXIANG, OU YONG, AI AIGUO, CHENG HAOXUAN, LUO SONGYUN, YU JIANG
• Format: Patent
• Language: Chinese; English
• Published: 29.03.2024
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The invention discloses a crack arrest steel welding method and application thereof.The welding method comprises the steps that firstly, a to-be-welded position of a crack arrest steel plate is machined into a V-shaped groove, the groove is pretreated, then the crack arrest steel plate is assembled, a gap is reserved at the root of the groove, an arc striking plate is welded to the arc striking end of a groove welding bead, and the crack arrest steel plate is welded to the arc striking end of the groove welding bead; a small curved part is welded to the arc suppression end and is conveniently hoisted on the test plate, then a double-wire electro-gas welding machine is adopted for welding, the current of a front wire is 360-380 A, the voltage is 32-34 V, and the standing time is 2 s; the rear filament current is 440-460 A, the voltage is 42-44 V, and the retention time is 3 s; and cooling a welding seam area behind the steel plate, and performing gas protection on a molten pool during welding. According to the