When the steel shot hits the surface of the casting quickly, it will cause distortion and deformation of the crystal lattice on the surface of the casting, which can strengthen the surface hardness of the metal, which is also a method for the surface of the casting. Sand blasting is often used to treat the surface of castings or to strengthen the surface of castings.
Sandblasting is all in the form of compressed air, and it is not necessary to use a high-speed rotating impeller for shot blasting. In the ship repairing and shipbuilding industries, steel shot blasting is used in steel plate pretreatment, that is, rust removal before painting; sandblasting is mostly used in formed ships, etc., and its purpose is to remove old paint and rust on steel plates. Wipe off, then repaint. In ship repair and shipbuilding, the effect of sandblasting is to increase the adhesion of the paint when the steel plate is painted.
Sand blasting is used for surface treatment of metal products such as steel. Shot peening is divided into general shot peening and stress peening. In general processing, the steel plate is in a free state, and the inside of the steel plate is hit with high-speed steel shots to generate precompressive stress on the surface. In order to reduce the tensile stress on the surface of the steel plate during work and increase the service life. Stress shot peening is to pre-bend the steel plate under a certain force, and then perform shot peening.
How to judge the quality of steel shot
Summary of hardness of several common steel shot and steel grit
The formation process of steel shot
Steel shot centrifugal pill forming technology is the preferred choice for producing national standard steel shots
