利用ANSYS10.0软件建立了18CrNiMo7-6齿轮钢的4层喷丸模型, 在考虑弹丸弹塑性变形条件下模拟了不同强度弹丸喷丸后齿轮钢的残余应力分布, 并进行了试验验证。结果表明: 喷丸之后齿轮钢表层形成了0.4 mm的残余压应力层, 最大残余应力为800~1 200 MPa, 最大残余压应力位置距表面0.12 mm; 随着弹丸强度的增大, 残余压应力也相应增大; 齿轮钢残余应力分布的模拟结果与试验结果比较吻合。

Four layers shot peening model of 18CrNiMo7-6 gear steel was built by ANSYS10.0 software, the residual stress distribution of gear steel after shot peening by shot with different strength under the condition of considering elasticoplastic deformation of shots, and experiment verification was performed. The results show that a residual compressive stress layer with thickness of 0.4 mm and maximum compressive stress of 800-1 200 MPa appeared on gear steel surface, and the distance from the position appearing maximum residual compressive stress to surface was 0.12 mm. The residual compressive stress increased with the increase of the strength of shots, and the experimental residual stress distribution coincided with the simulated ones for gear steel after shot peening.