In the process of granulating to make steel shot, molten steel is cooled from liquid to solid state, and shrinks during the cooling process. This shrinkage is carried out in a free state, and there is no riser like casting parts to reduce the volume after shrinkage. Part of the molten steel is replenished, so elliptical particles with concave surfaces appear. This kind of particles has undergone sufficient shrinkage, and the shape is not round but the structure is dense. Dense, there are internal defects such as shrinkage porosity and shrinkage cavities.
From the effect of use, the rounder the steel shot is not the better. Steel shot is usually used in the field of cleaning, and the cleaning efficiency of steel shot with high roundness is lower than that of steel shot with shrinkage. Throwing energy E=1/2mv2, poor roundness has good shrinkage and dense structure, so the same volume, large mass m, high impact energy, not easy to break; on the contrary, good roundness steel shot, the structure is not dense, Small particle mass, low kinetic energy, and easy to break.
Steel shot is widely used for descaling and rust removal treatment
How are steel shot and grit used to treat steel surfaces?
Steel shot is widely used for descaling and rust removal treatment
What are the unique characteristics of steel shot?
