What's the difference between shot blasting and shoot peening?
What's the difference between shot blasting and shoot peening?Check these two terminology from Wikipedia.
For shot blasting: Abrasive blasting(redirect from shot blasting) is the operation of forcibly propelling a stream of abrasive material against a surface under high pressure to smooth a rough surface, roughen a smooth surface, shape a surface, or remove surface contaminants. A pressurized fluid, typically air, or a centrifugal wheel is used to propel the blasting material (often called the media). The first abrasive blasting process was patented by Benjamin Chew Tilghman on 18 October 1870.
There are several variants of the process, such as bead blasting, sand blasting, sodablasting, and shot blasting.
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For shot Peening. Shot peening is a cold working process used to produce a compressive residual stress layer and modify mechanical properties of metals. It entails impacting a surface with shot (round metallic, glass, or ceramic particles) with force sufficient to create plastic deformation.
It is similar to sandblasting, except that it operates by the mechanism of plasticity rather than abrasion: each particle functions as a ball-peen hammer. In practice, this means that less material is removed by the process, and less dust created.
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So, generally, shot blasting will be focused on cleaning/abrasion, but for shot peening, it will focus on plastic deformation to form a residual stress.
Thank you Zluu22, you raised a good question, and I learned a lot. Thank you very much!
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