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Fast heating speed and high productivity
Since the energy is highly concentrated in the weld zone, the weld edge of the tube heats up to the required temperature in a short period of time (a few hundredths of a second to a few tenths of a second), and there is no "skip welding" at high speeds, resulting in high welding speeds.
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Wide range of materials
High-frequency resistance welding belongs to the category of pressure welding, which eliminates the need for external filler metals and avoids problems such as chemical metallurgical reactions between the weld material and the base metal, and therefore can be applied to a wide range of materials, such as carbon steel, alloy steel, stainless steel and many other metal materials.
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Small size of welded heat-affected zone
Because of the high welding speed, the workpiece self-cooling effect is strong, so the size of the welded heat-affected zone is small, and it is not easy to oxidize, the weld can be obtained better organizational properties.
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Pipe wall thickness uniformity, high dimensional accuracy
LSAHF welded steel pipe is made of rolled steel strip by welding after cold deformation, the uniformity of wall thickness and surface quality is better than seamless steel pipe, especially the dimensional accuracy of steel pipe is far better than seamless pipe or submerged arc welding pipe. At the same time, due to the use of hot rolled steel strip as raw material, the tube body of the inherent defects (such as cracks, inclusions, porosity, etc.) is very little, in more and more applications are used to replace seamless steel pipe. However, due to the limitation of molding equipment and heating power, the size of its pipe diameter and wall thickness are limited, and currently the pipe diameter is below Φ600mm and the wall thickness is below 13mm.
