Effect of different process parameters on derusting effect of thick wall stainless steel seamless tube

According to the mathematical model analysis, the experimental data table of vibration derusting process parameters for thick-walled stainless steel seamless tube was established. The vibration derusting effect tests were carried out in different vibration directions for the process parameters that affect the vibration derusting effect of thick-walled stainless steel seamless tube, and the macroscopic and metallographic comparison inspection of the derusting effect was carried out. The effect of different process parameters on the derusting effect of thick-walled stainless steel seamless tube was analyzed and tested. (1) abrasive hardness rust organization is loose, but the oxide layer on the metal surface and the base material combine strength is high, the higher the particle hardness, the better the effect of removing rust and oxide layer For the particles of the same material, the size is large, and the contact area between the particles and the rust spot increases, which affects the impact pressure. For the size of the steel pipe in this test, the diameter of the particles, D > 1.1-1.5 mm, basically has no rust removal effect. D > 0.9 ~ 1.1 mm, the derusting is obvious, D < 0.9 mm, the particle mass is small, the kinetic energy is small, the derusting effect is poor; (4) The relationship between amplitude and frequency acceleration, amplitude and frequency is as follows: the larger the amplitude, the larger the acceleration, the larger the particle kinetic energy, the better the derusting effect; With the increase of frequency, the acceleration increases, but the amplitude decreases, the derusting effect decreases, the frequency rate is too low, and the processing efficiency is low. Generally speaking, the longer the processing time is, the more obvious the derusting effect is. (6) The vibration direction is vertical vibration, and the impact energy of abrasive particles on the surface is used to remove rust spots and oxide scale, resulting in residual compressive stress on the surface, refining the surface grains, which can improve the corrosion resistance; Horizontal vibration uses friction to remove rust spots and oxide skin, resulting in residual tensile stress on the surface, which is less effective than vertical vibration. The combined vibration can improve the efficiency of derusting and scaling, and produce residual compressive stress on the surface.

Post time: Dec-31-2021