Ultrathin-wall stainless steel pipeline welding deformation control method

• Main Authors: HAN JIAN, YUAN KAIKAI, SHI ZHIWEI, FU WENPU
• Format: Patent
• Language: Chinese; English
• Published: 31.10.2023
• 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 an ultrathin-wall stainless steel pipeline welding deformation control method which comprises the following steps: firstly, cleaning before welding, then selecting a welding rod: selecting a welding wire with the model of CHG-308R, the diameter of the welding wire is 2.0 mm, the welding current is 40-60A, the welding speed is 5-8mm/min, the gas flow is 8L/min, and direct current positive connection is carried out; argon is filled in the pipe for protection in the welding process, before arc striking, a switch air supply valve is started, air in the pipe is removed, an argon tungsten-arc welding machine is selected as welding equipment, a positive connection method is adopted, and the welding machine model is WS-300A; after welding, welding seams and the peripheries of the welding seams have oxidation and welding spots and need to be treated. A stainless steel wire brush or other stainless steel tools are used for removing welding scraps at the welding position, brushing is conducted, t