Abstract
To introduce a large and deep compressive residual stress with the Shot Peening method, the authors conducted an experiment using Vacuum Carburized and Shot Peened or Stress Shot Peened specimens, and investigated the influence of Arc height (Ah), Shot radius (R), retained Austenite (γR) content, Strain Induced Martensite (MQ) content and loaded stress (σpre) upon compressive residual stress (σr) systemically. The major results obtained are: (a) The surface residual stress (σrs) and the maximum compressive residual stress (σr max) were almost dependent of Ah/R. (b) There is a little influence of γR content after Shot Peening upon σrs and σ<r max>. (c) There was hardly any influence of MQ content uponσrs and σ<r max>. (d) Approx.50% of σpre was introduced as σrs and σ<r max>. (e) Further, it was found the a linear relation exists between Ah/R, γR & σpre and σrs (σ<r max>).
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