Abstract
Maintenance of certain percentage of perfectly round shots, while removing the broken shots and replacing those with new shots, is important in shot-peening treatment. With respect to this process, the life of shots will affect the necessary amount of supply, and stands as one of important factors which determine the economy of peening operation.
The authors investigated the life of several ferrous and non-ferrous shots by a specially designed testing machine. The results obtained were as follows:
Life of larger, harder and faster traveling shots was low, but could obtain higher peening intensity. Comparison of life of ferrous shots, under the same peening intensity, showed that the steel cut wire shot had the 1ongest life followed by that of cast steel and cast iron shots.
