(1) Wave bendIt is the phenomenon that the edge part of the strip is repeatedly bent along the longitudinal direction, which is caused by the uneven deformation of the center and edge along the width direction during strip rolling. Wavy bends will cause serious lap welding during the forming and wel
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(1) CompressionInsert the square tubeinto the nozzle, fasten it with a nut, and use the screw force to compress the casing at the nozzle part through the sealing ring to play a sealing role and complete the connection of the square tube.(2) Quick connect flange typeRing-shaped argon arc weldin
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When the square tube is quenched, the following points should be paid attention to:(1) The slender pipe should be hung vertically in the salt bath furnace or pit furnace for heating to reduce the deformation caused by its own weight.(2) When pipe fittings with different cross-sectional sizes are hea
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Phosphating is a process in which chemical and electrochemical reactions form a phosphate conversion film, and the formed phosphate conversion film is referred to as a phosphating film. It can play a big role in improving the rust resistance of square and rectangular tubes. When we phosphate the rec
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