Characteristics of Shot Peened Surfaces and Surface Layers

Author:  Dr. Katsuji Tosha
Source:  The Shot Peener magazine, Vol 19 / Issue 1, Winter 2005
Doc ID:  2005014
Year of Publication:  2005
Abstract:  
ABSTRACT This paper describes the influence of the shot size, the shot velocity and the work hardness on the characteristics of peened surfaces and surface layers. In order to clarify the clear influences of those factors, a medium carbon steel (S45C) was peened by a centrifugal type peening machine using 4 different cast steel shots. Following results are obtained; (1) The diameter of dent is in proportion to the shot size and the square root of the shot velocity, and in inverse proportion to the fourth root of the work hardness. (2) The contact angle of dent is in proportion to 2/3 power of the shot velocity, and the values were varied from 11 to 18