Domestic straight welded pipe manufacturers usually improve their performance by adding alloys to materials. After the cold pulse, stress annealing must be performed to eliminate the residual stress of the material to prevent the broken welding pipe from broken.
At present, the manufacturer of straight seam welded pipes in my country improves the strength of the metal through cold pulling deformation, but this is at the expense of the shape and toughness of the metal.
Cold -pull straight welding pipes are based on the market. They have high -size accuracy and high -intensity performance. It must ensure that the deformation must be within a certain range in order to maximize the performance of the material and reduce the adverse effect on materials.
If the straight seam welded pipe is small, it cannot meet the flatness and size requirements of the parts, and it cannot meet the strength requirements of the component. If the deformation is too large, the plasticity and toughness of the straight seam welded pipe will be greatly reduced. Instead of forming a fiber structure, metal has obvious opposite sex.
The axis direction of the cold pulled straight seam tube is parallel to the stretch direction of the grains. Xiang, so, if the deformation is too large, it is impossible to give full play to the performance of the cold pull tube.
