Hardened Metal Product Produced by Shot Peening with Shot Having High Hardness

Author:  H Rokutanda; T Takahashi; J Kurosaki; T Ito
Source:  US Patent 6,153,023
Doc ID:  2000020
Year of Publication:  2000
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.