Seamless stainless steel tubes are more commonly used as industrial raw materials than plastic or metal tubes, and various materials of tubes are important building materials and industrial raw materials, among which plastic and metal tubes are more commonly used.
Currently, the most commonly used seamless stainless steel tubes are PVC or PE tubes. Although PVC or PE pipelines are relatively economical, have high corrosion resistance, and can replace many metal pipelines, their performance still has certain defects and cannot meet the needs of certain special environments.
Seamless stainless steel tubes can be divided into three categories according to different production processes: hot rolling, hot extrusion, and cold-drawn seamless stainless steel tubes. Regardless of which type of seamless stainless steel tube, its production process is much more complicated than welded tubes, and coiling is also much more complicated, so their prices vary greatly. Seamless stainless steel tubes are usually made from round tube blanks through a perforation machine, and the thinner the inner wall of the seamless stainless steel tube, the higher the requirements for the perforation treatment. The production process will require more technology and price, which naturally is high.
Usually, household seamless stainless steel tubes improve the material's performance by adding alloys to the metal. After cold drawing, stress relief annealing is required for seamless steel tubes to eliminate residual stress of the material, improve the material structure, and improve plasticity of the material. Occasionally, seamless stainless steel tubes may rupture, so how to prevent this from happening?
Household seamless stainless steel tubes usually improve the material's performance by adding alloys to the metal. After cold drawing, stress relief annealing is required for seamless stainless steel tubes to eliminate residual stress of the material, improve the material structure, and improve material plasticity, in order to prevent the fracture of seamless stainless steel tubes.
Currently, the material of seamless stainless steel tubes is ordinary 45# or 20# steel 27SiMn steel, which improves the metal strength through cold deformation. However, this is at the cost of metal plasticity and toughness. Seamless stainless steel tubes stand out in the market due to their high dimensional accuracy and high strength performance. It is necessary to ensure that the deformation amount is within a certain range, so as to maximize the material's performance and minimize adverse effects on the material.
If the deformation of seamless stainless steel tubes is too small, it cannot meet the requirements of surface finish and dimensional accuracy, nor can it meet the strength index of components; if the deformation is too large, the plasticity and toughness of seamless stainless steel tubes will be greatly reduced, and the grains will be pulled too finely, forming a fibrous structure, and the metal will have obvious anisotropy. The axial direction of cold-drawn seamless stainless steel tubes is parallel to the long side direction of the grains, and the strength increases. Stress exists radially on the stainless steel precision tube, so excessive deformation is not conducive to the overall performance of the cold-drawn tube.