Method for improving welding efficiency of welding seam of 9% nickel steel butt jointed board

• Main Authors: GONG JIANHUA, LIU LIANG, CHEN QIAN, OUYANG YANG, FANG RUYI, ZHU FENG, CHEN YIFENG, SHEN HAIJIAN, SHI SUWEN
• Format: Patent
• Language: Chinese; English
• Published: 13.06.2023
• 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 a method for improving the welding efficiency of a welding seam of a 9% nickel steel butt jointed board, which comprises the following steps of: (1) forming an X-shaped groove on the 9% nickel steel jointed board, and finishing assembly according to the assembly size requirement of the X-shaped groove; (2) the truncated edge of the groove surface of the 9% nickel steel jointed plate is polished, and impurities on the two sides of a groove welding seam of the 9% nickel steel jointed plate are removed; (3) reinforcing and fixing the 9% nickel steel jointed board by adopting a clamping plate, and additionally arranging an arc striking and extinguishing plate at the arc striking and extinguishing end of the welding seam of the 9% nickel steel jointed board; (4) when the front face or the flat welding face of the X-shaped groove of the 9% nickel steel jointed board is welded, backing welding is carried out firstly, then filling welding is carried out, and then cosmetic welding is carried ou