Cast Steel Shot, Metal Abrasive, Stainless Steel Shot
Shot peening are driven by a shot peening machine powered by compressed air, so that it can obtain strong kinetic energy and bombard the metal surface through a nozzle. When the bombardment intensity is greater than the yield stress of the metal surface, the metal surface undergoes a plastic change, and is bombarded into a concave shape by the steel shot, resulting in a compressive stress layer on the metal surface; the metal will be subjected to cyclic alternating loads during use, and the alternating load will form Tensile stress, resulting in metal fatigue fracture.
After shot peening, compressive stress will be formed on the metal surface, which can effectively suppress and offset the tensile stress, delay the occurrence of metal fatigue, prolong the service life of the metal, and increase the wear resistance and corrosion resistance of the metal. This is the residual stress strengthening in shot peening; in the process of shot peening, the bombardment of the metal surface by the pellets will also strengthen the metal structure and reduce the structural fracture in the non-stress bearing direction, which is the structure in shot peening. strengthen. Features of shot peening processing: The power source of shot peening is compressed air, so the structure of shot peening machine is simple and reliable. Pill handling is convenient and is not limited to the shape and location of the product. The shot peening machine has multiple nozzles with different stations, and the workpiece can be rotated and reversed on the fixed table, so that it is fully exposed to the flow of shot peening without dead ends; however, the energy conversion efficiency of shot peening is lower than that of shot peening. Because of the energy required to compress the air on the air compressor, the compressed air then drives the pellets. In this process, there are many energy conversion steps, and the loss is large, so the energy utilization rate of shot blasting is not as high as that of shot blasting; due to the low energy conversion and large aerodynamic resistance, the shot peening efficiency is generally difficult to reach the level of shot peening, and the efficiency is low. Shot peening is also a shot peening process. A more accurate statement is sandblasting and rust removal, because in the process of shot peening and rust removal, the media used are more steel sand, silica sand, corundum and so on. They are irregular in shape, angular and non-plastic, and can better penetrate the oxide layer on the metal surface and remove rust. It is a more suitable shot peening medium for rust removal.
