Method of Shot Peening a Hardened Metal Product with Shot Having High Hardness

Author:  H Rokutanda; T Takahashi; J Kurosaki; T Ito, Japan
Source:  US Patent 5,916,383
Doc ID:  1999074
Year of Publication:  1999
Abstract:  
A method for shot peening a hard metal product that has a hardened surface. The method includes projecting shot on the hardened surface of the hard metal product. The ratio of the Vickers hardness of the shot to that of the hardened surface is 0.8-1.6, and the diameter of the shot is 30-250u.