Finite element analysis of effect of double shot peening on residual stress of 18CrNiMo7-6 gear steel
WANG Zhen
SUN Hao
WANG Guohao
Abstract：[Objective]To address the issues of uneven residual compressive stress distribution and high surface roughness in gears after shot peening,this study investigates the effect of double shot peening on the surface integrity of 18CrNiMo7-6 car-burized gear steel.[Methods]A shot peening model with random shot distribution was established using Abaqus software.The effects of shot peening parameters such as shot velocity and shot diameter on the residual stress and surface morphology of the 18CrNiMo7-6 carburized gear steel were analyzed for both single and double shot peening.[Results]The results show that com-pared with single shot peening,double shot peening leads to more uniform plastic deformation on the material surface.The dou-ble shot peening significantly increases the residual compressive stress in the surface layer and shifts the depth position of the maximum residual compressive stress towards the surface,but has no significant effect on the depth of the residual compressive stress layer.Through variance analysis,when the shot coverage is 100%,using a lower shot peening intensity for the second shot peening process improves the uniformity of the surface residual compressive stress more effectively,with the maximum improve-ment reaching 28.76%.
Keywords：Double shot peening18CrNiMo7-6 steelResidual stressSurface topographyFinite element analysis
Publication Date：2025-02-14
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：10( 101-110 )