Abstract
This paper treats the result of studying the effect of shot of shot size, hardness and speed on the coverage, peening intensity or surface roughness of the work. Results obtained are as follows:
1) The size of indentation marked on the surface increases as the wheel speed goes up and is practically proportional to the shot diameter.
2) Peening intensity increases as the shot size, velocity, or hardness increases.
3) Surface roughness increases as the shot size, speed, or hardness increases. When the surface has the initial roughness, this may, in some case, be lowered by peening.
4) Intensity by soft, heat-treated steel or iron shot is high enoughand does not roughen the surface of work to be peened.
5) Broken shot loweres the peening intensity but does not affect theroughness.
