Methods to prevent the fracture of straight seam steel pipe

Straight seam steel pipe manufacturers usually improve their performance by adding alloys to the material. After cold drawing, stress annealing must be carried out to eliminate the residual stress of the material to prevent the fracture of the straight seam steel pipe. At present, China's straight seam steel pipe manufacturers improve the strength of the metal by deforming the metal through cold drawing, but this is at the expense of the shape and toughness of the metal.

Cold-drawn straight seam steel pipe is based on the market with high dimensional accuracy and high strength performance, and it must be ensured that the deformation is within a certain range in order to maximize the performance of the material and reduce the adverse effects on the material, the axial direction of the cold-drawn straight seam steel pipe is parallel to the elongation direction of the grains, and the strength of the cold-drawn straight seam steel pipe is perpendicular to the elongation direction of the grains but the strength is declining, and the maximum stress of the hydraulic cylinder exists in the radial direction of the straight seam steel pipe , so that the deformation is too large to give full play to the performance of the cold-drawn pipe.

If the deformation of the straight seam steel pipe is too large, then the plasticity and toughness of the straight seam steel pipe manufacturer will be greatly reduced, the grains are stretched too long and can not form a fiber structure, and the metal has obvious anisotropy. If the deformation is small, it can neither meet the requirements of flatness and dimensional accuracy of the parts, nor can it meet the strength requirements of the components.