304不锈钢板材喷丸强化处理最佳工艺参数研究  

Numerical investigation on the optimization of shot peening process parameters of 304 stainless steel sheet

作　　者：赵韩[1] 朱仁胜[1] 张月[1] 周隐 孙程[1] 刘四洋[1] 

机构地区：[1]合肥工业大学机械与汽车工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2016年第3期320-323,403,共5页Journal of Hefei University of Technology：Natural Science

摘　　要：文章运用ANSYS/LS-DYNA建立了304不锈钢板材多丸喷丸硬化处理的有限元模型,模拟了不同喷丸参数(弹丸的速度、半径和强度)对304不锈钢板材残余应力的影响规律。先计算不同层深的平均残余应力值,以得到不同参数下最大残余应力场;再对模拟结果采用逐步回归分析法建立残余应力关于工艺参数的最优回归方程,从而获得了最大残余应力随不同参数的变化图,并通过残余应力测试对上述方程进行了验证。结果表明:数值计算所得最优回归方程计算结果和实验结果相符,可据此针对所需的最大残余应力要求确定喷丸工艺参数,为工程实践提供依据。In this paper, the finite element model of shot peening process for multiple shot impacts on 304 stainless steel sheet is developed by using ANSYS/LS-DYNA code. The model is applied to inves- tigating the effects of shot velocity, radius and strength of shot material on the residual stress of tar- get. Firstly, the averaged residual stresses along the depth of target are calculated and the maximum residual stresses are obtained. Secondly, the optimal regression equations of maximum residual stress as a function of shot velocity, radius and strength are determined by means of stepwise regression of numerical results. Consequently, the maximum residual stress profiles are plotted against two param- eters when the third one is invariable. The change of maximum residual stress along with different pa- rameters are obtained, and the results are validated by experiments. It is shown that the numerical re- suits are in good agreement with the experimental ones, the parameters can be determined based on the needed maximum residual stress, and the result be applied to solving engineering problem.

关 键 词：304不锈钢 喷丸 残余应力 有限元 工艺参数 逐步回归 

分 类 号：TG178[金属学及工艺—金属表面处理]