Seamless steel gas cylinder tube

The cylinder tube is a kind of high-precision steel pipe material processed by cold drawing or hot rolling. Due to the fact that the inner and outer walls of the precision steel pipe are free of oxide layers, withstand high pressure, no leakage, high precision, high gloss, no deformation due to cold bending, no flaring, no flat cracks, etc., they are mainly used for the production of pneumatic or hydraulic components such as cylinders or the cylinder can be a seamless steel tube. The chemical composition of the cylinder tube is carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, chromium Cr.

Processing technology of seamless steel gas cylinder tube
The cylinder tube adopts rolling processing, because the residual pressure stress on the surface remains on the surface layer, which contributes to the closure of surface micro cracks and hinders the expansion of the erosion effect. In order to improve the surface corrosion resistance, and can delay the generation or expansion of fatigue cracks, thus increasing the fatigue strength of the cylinder tube. Through roll forming, the rolling surface forms a layer of cold hardened layer, which reduces the elastic and plastic deformation of the contact surface of the grinding pair, thereby improving the wear resistance of the inner wall of the cylinder tube and avoiding the burn caused by grinding. After rolling, the reduction of the surface roughness value can improve the blending properties. Rolling processing is a kind of chipless processing. At the normal temperature, the plastic deformation of the metal is used 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. It can not be achieved by grinding.

No matter what processing method is used to process, there will always be fine uneven marks on the surface of the part, and there will be staggered peaks and valleys. The principle of rolling processing: It is a kind of pressure finishing and uses metal at room temperature. The cold plasticity of the state, the use of rolling tools on the surface of the workpiece to apply a certain pressure, so that the workpiece surface metal plastic flow, fill in the original residual trough valleys, and to achieve a reduction of the workpiece surface roughness. Due to the plastic deformation of the surface metal being rolled, the surface layer is cold-hardened and the grains become fine, forming a dense fibrous form, and forming a residual stress layer, which improves the hardness and strength, thereby improving the wear resistance and corrosion resistance of the workpiece surface. Sex and fit. Rolling is a non-cutting plastic processing method.

Advantage of seamless steel gas cylinder tube
1, To improve the surface roughness, roughness can basically reach Ra≤0.08µm or so.
2. Correct roundness, ellipticity can be ≤ 0.01mm.
3, Increase the surface hardness, eliminate stress deformation, increase hardness HV ≥ 4 °
4, Residual stress layer after processing, improve fatigue strength by 30%.
5, Improve the quality of the match, reduce wear and prolong the service life of the parts, but the processing costs of the parts are reduced.