Steel shot for shot peening is a type of media used in the surface treatment process, often used in automotive, aviation, and aerospace industries. Shot peening is a process that involves creating a compressive stress layer on the surface of a metal component by bombarding it with high-velocity, small-sized steel balls. This can improve the component's strength, durability, and lifespan.
Steel shot peening media is made from high-quality steel that is melted and then atomized into tiny particles. The shot size can vary from 0.2mm to 2mm, depending on the application. The shot is then heat-treated to obtain a specific hardness and toughness that can withstand high-speed impacts.
One of the most common applications for steel shot peening is in the automotive industry, where shot peening is used to improve the strength and durability of engine components, such as gears, springs, and connecting rods. Shot peening can also be used to enhance the fatigue life of turbine blades in the aviation and aerospace industries.
The shot peening process requires not only the appropriate steel shot but also specialized equipment, such as shot blasting machines. Shot blasting machines use high-pressure air streams to propel the steel shot onto the metal component. The components are typically placed onto a rotating table or in a tumbler, which allows for even and consistent coverage.
The effectiveness of shot peening depends on various factors, such as shot size, shot velocity, shot coverage, and intensity. The process must be carefully controlled to achieve the desired results. The intensity of the process is measured using an Almen strip, a small piece of metal that is bombarded with steel shot to create a deformation arc. The length of the arc is then measured to determine the impact energy and intensity of the shot peening process.
