Production characteristics of straight seam high frequency welded steel pipe

Regarding straight seam high-frequency welded steel pipes, high-frequency butt welding is used, including high-frequency contact welding and high-frequency induction welding, and the current frequency range is 350-450kHz. Its own production process is simple, high production efficiency and low cost

Fast heating speed and high production efficiency

Because the energy is highly concentrated in the welding area, the welding edge of the tube is heated to the temperature required for welding in a short time (a few hundredths of a second to a few tenths of a second), and there is no "jump welding" phenomenon during high-speed welding. Therefore, a high welding speed can be obtained.

Suitable for a wide range of materials

High-frequency resistance welding belongs to the category of pressure welding. No external filler metal is needed during welding, and problems such as chemical metallurgical reactions between welding materials and base metal metals are avoided. Therefore, it is suitable for a wide range of materials and is suitable for welding carbon steel, alloy steel, stainless steel, etc. welding of metal materials.

Welding heat-affected zone size is small

Due to the high welding speed and strong self-cooling effect of the workpiece, the size of the welding heat-affected zone is small, and oxidation is not easy to occur, and the weld can obtain better microstructure and properties.

Uniform steel pipe wall thickness, high dimensional accuracy

Straight seam high-frequency welded steel pipe is made by welding the rolled steel strip after cold deformation. It is superior to seamless steel pipe in terms of wall thickness uniformity and surface quality, especially the dimensional accuracy of steel pipe is far better Submerged arc welded pipe. At the same time, due to the use of hot-rolled steel strips as raw materials, there are very few internal defects (such as cracks, inclusions, pores, etc.) in the pipe body, and it is used to replace seamless steel pipes in more and more applications. However, due to the limitation of molding equipment and heating power, the size and wall thickness of the pipe are limited. At present, the pipe diameter is below Φ600mm and the wall thickness is below 13mm.