The common seamless stainless steel pipe improves the performance of the material by adding alloy to the metal. After cold drawing, it is necessary to carry out stress relief annealing on seamless steel pipe to eliminate residual stress, optimize material structure optimize material. Plastic seamless stainless steel pipe will occasionally crack, so how to prevent this phenomenon? Let the technical personnel of seamless stainless steel pipe manufacturer answer for you.
Seamless stainless steel pipe usually improves material properties by adding alloy to metal. After cold drawing, the seamless stainless steel tube needs stress relief annealing to eliminate the residual stress of the material, optimize the structure of the material optimize the material. Plasticity to prevent seamless stainless steel pipe breaking breaking.
At present, the material of seamless stainless steel pipe is 27SiMn Steel of common 45 20 steel, the metal strength is improved by cold drawing deformation. However, this comes at the cost of the plasticity toughness of the metal. Seamless stainless steel pipe is based on the market for its high dimensional accuracy high strength performance. It is necessary to ensure that the deformation is within this range, so as to reduce the adverse effect on the material performance.
The deformation of seamless stainless steel pipe is too small to meet the requirements of surface finish dimensional accuracy, also can meet the strength index of components; if the deformation is too large, the plasticity toughness of seamless stainless steel pipe will be reduced too much, the grain will be pulled too fine to form fibrous structure, the metal will have obvious anisotropy. The axial direction of cold drawn seamless stainless steel tube is parallel to the long side direction of grain, the strength increases. The radial direction of cold drawn seamless stainless steel tube is perpendicular to the long side direction of grain, but the strength decreases the hydraulic cylinder is larger. The radial stress also exists in the stainless steel precision tube, so the large deformation is conducive to the full performance of the cold drawn tube.