Welding technique for steel structure box column

Abstract

The invention discloses a welding technique for a steel structure box column. The welding technique comprises the following steps that rust, oxidizing slag and oil stains on connectors to be welded and areas which are 50-millimeter within the two sides of a welding portion are polished to be clean; partition plates of an inner cavity of the steel structure box column are welded through electroslag welding, and weld beads on the two sides of the partition plates are welded at the same time through HJ360 welding flux and silicon-contained welding wires; two main weld joints are welded at the same time, then the box column is turned by 180 degrees, and the other two main weld joints are welded at the same time; and heat preservation is conducted on the weld joints after welding is finished, ultrasonic flaw detection is conducted on the weld joints 38 hours later after welding, and the welding quality is guaranteed. According to the welding technique for the steel structure box column, the operability is high, the weld joints are heated uniformly, fusion penetration is uniform, the welding stress is small, the welding contraction deformation is small, the welding quality is high, and the welding speed is increased.

Description

technical field [0001] The invention relates to the technical field of building structures, in particular to a welding process for steel structure box columns. Background technique [0002] Steel structure buildings have been widely promoted in China in recent years. Compared with concrete structures, steel structure buildings have the advantages of less total steel consumption, industrialized component manufacturing, good earthquake resistance, fast installation speed, and low cost. in civil buildings. Among them, the steel columns of multi-story steel structure buildings mostly adopt H-shaped steel, round pipe steel, cross-shaped steel, steel structure box-type columns, etc., because the steel structure box-type columns have good working performance in two mutually perpendicular directions of force , which can better satisfy the strength of the steel column and the stability of the overall structure, and the welding of the steel structure box-shaped column is the key proc...

AI Technical Summary

Problems solved by technology

Among them, the steel columns of multi-story steel structure buildings mostly adopt H-shaped steel, round pipe steel, cross-shaped steel, steel structure box-type columns, etc., because the steel structure box-type columns have good working performance in two mutually perpendicular directions of force , which can better satisfy the strength of the steel column and the stability of the overall structure, and the welding of the steel structure box-shaped column is the key process of the overall process. Structural box-shaped columns are heavy, thick steel plates, and high rigidity. The welds cannot guarantee uniform penetration, and the welding deformation is not easy to control, which affects the quality and progress of welding.