Main classification of shot peening treatment

Shot peening is also divided into shot peening and sandblasting. Surface treatment using shot peening has a high impact force and obvious cleaning effect. However, the treatment of thin sheet workpieces by shot peening can easily cause deformation of the workpiece, and the impact of steel balls on the surface of the workpiece (whether shot peening or shot peening) can cause deformation of the metal substrate. Due to the lack of plasticity of Fe3O4 and Fe2O3, they peel off after crushing, and the oil film deforms together with the substrate. Therefore, for workpieces with oil stains, shot peening and shot peening cannot completely remove oil stains. Among the existing surface treatment methods for workpieces, sandblasting cleaning has the best cleaning effect.
Sandblasting is suitable for cleaning workpieces with high surface requirements. However, most of the general sandblasting equipment in China is composed of primitive heavy sand conveying machinery such as hinges, scrapers, and bucket elevators. Users need to construct a deep pit and a waterproof layer to install machinery, which is costly to construct and requires a significant amount of maintenance and upkeep. During the sandblasting process, a large amount of silica dust cannot be removed, seriously affecting the health of operators and polluting the environment.
Shot peening is divided into general shot peening and stress shot peening. In general, when the steel plate is in a free state, high-speed steel balls are used to strike the inside of the steel plate, causing pre compression stress on its surface. To reduce the tensile stress on the surface of the steel plate during work and increase its service life. Stress shot peening is the pre bending of a steel plate under a certain force, followed by shot peening.