Technology and application of high frequency welding of thin wall H-shaped steel

The proportion of H profile in the construction field is increasing, and H-beam steel includes three production processes of hot rolling, welding and high-frequency welding.

High-frequency welding H-shaped steel products use high-frequency current to locally heat the metal surface, forming welding under the action of external force, without the use of any wire flux, can achieve continuous mass production. Advantages of high-frequency welding H-beam steel: good stiffness, the side stiffness of H-beam steel is more than 1 times larger than that of I-beam steel; Save the amount of steel, in the case of the same bearing capacity, save the amount of steel 10%-15%; Flexible section, section size with flexibility and complementarity, can be customized according to user requirements; Fast welding speed, up to 45m/min; Shorten the construction period, which can shorten the construction period by 30%-50% compared with the submerged arc welding H-beam steel of the same specification, and reduce the weight of the steel structure by 30%-40%.
However, high-frequency welding H-beam steel also has a narrow application scenario, and the objective existence of extrusions at the weld during high-frequency welding affects the appearance quality and anti-corrosion surface treatment.

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