Plastic deformation and wear resistance of A106B honed tube

- Jun 26, 2019-

The A106B honed tube is subjected to rolling processing during the production process, and the surface layer is left with surface residual compressive stress, which contributes to the sealing of the surface micro crack and hinders the expansion of the erosion effect. Thereby, the surface corrosion resistance is improved, and the generation or expansion of the fatigue crack can be delayed, thereby improving the fatigue strength of the honing pipe. Through roll forming, the rolling surface forms a cold hardening layer, which reduces the elastic and plastic deformation of the grinding contact surface, thereby improving the wear resistance of the inner wall of the honing pipe and avoiding burns caused by grinding. . After rolling, the surface roughness value is reduced to improve the compounding property.

 

The rolling process of the honing pipe is a chipless processing, which utilizes plastic deformation of the metal at normal temperature to flatten the microscopic unevenness of the surface of the workpiece to achieve the purpose of changing the surface structure, mechanical properties, shape and size. Therefore, this method can achieve both the finishing and strengthening purposes at the same time, which is impossible for grinding.

 

The principle of rolling processing of honing pipe: it is a kind of pressure finishing process, which utilizes the cold plasticity characteristic of metal in normal temperature state. The rolling tool is used to apply a certain pressure to the surface of the workpiece to make plastic flow of the surface metal of the workpiece. Into the original residual low concave valley, and the surface roughness of the workpiece is reduced. Due to the plastic deformation of the rolled surface metal, the surface layer is cold hardened and the grain is thinned to form a dense fibrous shape, and a residual stress layer is formed, and the hardness and strength are improved, thereby improving the wear resistance and corrosion resistance of the surface of the workpiece. Sex and fit. Rolling is a non-cutting plastic working method.

 

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