Welding method suitable for Q500qE bridge steel plate

• Main Authors: TIAN MENG, YANG HAO, LI LI, QU JINBO
• Format: Patent
• Language: Chinese; English
• Published: 05.01.2024
• 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 welding method suitable for a Q500qE bridge steel plate. The welding method comprises the steps that a groove is machined; performing pretreatment; welding is conducted, single-power double-filament submerged arc welding is adopted, the welding current is 330-580 A, the arc voltage is 28-32 V, the welding speed is 360-500 mm/min, the welding heat input quantity is 15.4-29.9 kJ/cm, and a welding wire comprises 0.04%-0.09% of C, 1.4%-1.7% of Mn, 0.15%-0.28% of Si, 0.2%-0.4% of Mo, 2.2%-2.9% of Ni, 0.05%-0.15% of Ti, 0.002%-0.005% of B, smaller than or equal to 0.35% of Cu, smaller than or equal to 0.005% of S, smaller than or equal to 0.012% of P and the balance Fe and impurities. And the CTOD value of weld metal and a coarse grain zone of a welding heat affected zone at-20 DEG C is greater than or equal to 0.28 mm. 本发明揭示了一种适用于Q500qE桥梁钢板的焊接方法，焊接方法包括：坡口加工；预处理；焊接，采用单电双细丝埋弧焊，焊接电流为330～580A，电弧电压为28～32V，焊接速度为360～500mm/min，焊接热输入量为15.4～29.9kJ/cm，焊丝中，C 0.04～0.09％，Mn 1.4～1.7％，Si 0.15～0.28％，Mo 0.