Electronics Incorporated - The Shot Peener - Shot Peening Library
Title: Dual Shot Peening to Maximize Beneficial Residual Stresses in Carburized Steels
Author: Ahmad, Eaton Corp., Crouch, Metal Improvement Co
Source: TSP, Vol 16 / Issue 2, Summer 2002
Publication year 2002
Document number: 2002097
Number of pages: 4
Abstract:
Reprinted with permission from Carburizing: Processing and Performance (1989) ASM International, Materials Park, OH 44073-0002, pages 277-281.
ABSTRACT
Recent advances in shot peening technology have resulted in the development of a two stage process to maximize the beneficial surface residual stresses induced in hardened,
carburized steel, such as SAE 8620, a material commonly used for gears. Steel samples with an effective case depth of 0.72mm (0.029in) were used. Shot peening conditions
investigated included: a) single shot peening with: regular hardness steel shot (HRC 45-55), hard steel shot (HRC 55-62), and b) dual peening, first with hard steel shot
followed by either smaller diameter hard steel shot at a lower intensity, or smaller diameter glass beads at lower intensities. To investigate the near surface effects
initially observed, two samples were dual peened after surface layer removal (0.13mm - 0.29mm).
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