Repair method for severe cracking of T-shaped weld joint of blast furnace shell

• Main Authors: WANG ZHENGMING, JIANG LINGANG, GAO LI, LIU HONGTAO
• Format: Patent
• Language: Chinese; English
• Published: 28.01.2022
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; COMBINED OPERATIONS; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; OTHER WORKING OF METAL; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; UNIVERSAL MACHINE TOOLS; WELDING; WORKING BY LASER BEAM

The invention discloses a repairing method for severe cracking of a T-shaped weld joint of a blast furnace shell. The repairing method comprises the following steps: the cracking part of the T-shaped weld joint is cleaned; a lining plate is machined according to the shape and size of the cleared T-shaped welding seam cracking part, the lining plate is made of the same material as the furnace shell, the shape of the lining plate is the same as that of the cleared T-shaped welding seam cracking part, and the size of the lining plate is slightly larger than that of the cleared T-shaped welding seam cracking part; and a lining plate is welded to the cleared T-shaped welding seam cracking part, the lining plate is located on the inner side of the furnace shell, the lining plate is matched with the cleared T-shaped welding seam cracking part, the cleared T-shaped welding seam cracking part is welded, and a high-toughness welding rod is adopted as a welding material for welding. The repairing method is simple in ove