STRAIGHT SEAM STEEL PIPE THAT THERE ARE SEVERAL WELDING PROCESS

Straight seam steel pipe formed in the welding of the connection of the two joints are called welds. Welds on both sides of the weld will be subjected to welding heat, and the organization and performance changes, this area is known as the heat affected zone. Welding and welding due to the workpiece material, straight seam steel welding current and so on, after welding in the weld and heat affected area may have overheating, brittle, hardened or softening phenomenon, but also to reduce the performance of welding parts, deterioration of welding. This requires the need to adjust the welding conditions, pre-weld weldment preheating, welding insulation and post-weld heat treatment can improve the welding of welding quality.

Straight seam steel pipe is two or two kinds of the same or dissimilar materials through the atomic or molecular combination of the connection and diffusion into a whole process, to promote the combination of atoms and molecules of the method of bonding and diffusion is heated or pressurized, Or at the same time heating and pressurization.

In addition, the welding of a local part of the rapid heating and cooling process, the welding area due to the surrounding body of the workpiece body can not be free to expand and shrink the cooling after welding in the weld will produce welding stress and deformation. Important products need to eliminate welding after weldingStress, correct welding deformation.

The cross-sectional shape of the weld seam of the straight seam pipe is determined by the thickness of the welded body before welding and the beveled pattern of the two ends. When welding thicker steel plates, various shapes of groove are opened at the edge for penetration so that it is easier to feed into the electrode or wire. Groove type with single-sided welding groove and welding on both sides of the groove. Select the groove type, in addition to ensure that welding should also be considered to facilitate welding, filling the metal Chi small, straight seam steel welding deformation and small groove processing costs and other factors.