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Title: Application Of Ceramic Shot For Peening Of Automotive Suspension Coil Springs
Author: Abadie, Beaudonnet, Dixon, Fader, Fabre, Barrallie
Source: Conf Proc: ICSP-10 Tokyo, Japan 2008
Publication year 2008
Document number: 2008082
Number of pages: 6
Abstract:
ABSTRACT
The use of ceramic shot for the improvement of high strength steel endurance is confirmed to enhance coil spring fatigue life by improving the surface condition and
providing high levels of residual stress at the surface. Since the last conference in 2005 [1], a major technology development effort led by MSSC has resulted in the
implementation of 2nd stage ceramic peening process in an industrial application for
highly loaded suspension coil springs. Industrial benefits and a significant improvement in coil spring fatigue life have been observed. This paper reports on upgraded
knowledge on ceramic peening and industrial results, including case studies on actual parts. The analysis of actual coils provides a good understanding of the benefits of
ceramic peening on the material - lower surface damage and less disturbed roughness with high compressive residual stress close to the surface.
KEYWORDS
High strength steel, automotive suspension coil springs, double shot peening,
ceramic shot, steel shot, fatigue life.
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This page last revised: 03/22/2010