微粒子喷丸对靶材残余应力场的影响

doi:10.13251/j.issn.0254-6051.2020.05.038

金属热处理 ›› 2020, Vol. 45 ›› Issue (5): 192-198.DOI: 10.13251/j.issn.0254-6051.2020.05.038

微粒子喷丸对靶材残余应力场的影响

王超, 张海, 李冬飞, 云浩, 徐文苏, 赵武

河南理工大学机械与动力工程学院, 河南焦作 454000

收稿日期:2019-10-11 出版日期:2020-05-25 发布日期:2020-09-02
通讯作者: 张海,教授,E-mail:jxzhang@hpu.edu.cn
作者简介:王超(1990—),男,硕士研究生,主要研究方向为微粒子喷丸残余应力场及表面粗糙度, E-mail:2679350004@qq.com。
基金资助:
国家自然科学基金(U1604140)

Effect of microparticle shot peening on residual stress field of target

Wang Chao, Zhang Hai, Li Dongfei, Yun Hao, Xu Wensu, Zhao Wu

School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo Henan 454000, China

Received:2019-10-11 Online:2020-05-25 Published:2020-09-02

摘要/Abstract

摘要： 为了研究微粒子喷丸多颗粒冲击靶材时的残余应力场,建立了1个中心粒子周边均布6个粒子的7粒子冲击模型。应用有限元软件,对微粒子搭接率、冲击速度、冲击角度、直径等喷丸工艺参数对中心粒子冲击坑中心点处残余应力场的影响进行了仿真研究。结果表明:当搭接率ζ≤0.5时,ζ的变化对残余压应力场深度没有影响,而ζ=0.75是表面残余压应力S_S变化的分界线,只有在ζ＞0.75时,残余压应力场的4个特征值才均随着ζ的增大而增大;增大微粒子直径、减小冲击角度,有利于增大残余压应力场的深度,但同时也会减小残余压应力场的大小。增大微粒子的冲击速度,残余压应力场的深度增大,而残余压应力场的大小呈现一定的波动性,但是两者均在冲击速度为200 m/s时取得最大。

关键词: 微粒子, 喷丸, 靶材, 残余应力场

Abstract: In order to study the residual stress field of the target caused by multi-particle impact of microparticle shot peening, a 7-particle impact model with 6 particles distributed around the center particle was established. The effect of shot peening parameters such as overlap rate, impact velocity, impact angle and particle size on the residual stress field at the center of the impact crater was simulated by finite element software. The results show that when the overlap rate ζ≤0.5, the change of ζ has no effect on the depth of residual compressive stress field, but ζ=0.75 is the boundary of surface residual compressive stress S_S changing. Only when ζ＞0.75, the four characteristic values of residual compressive stress field increase with the increase of overlap rate. Increased diameter and reduced impact angle are beneficial to increase the depth of residual compressive stress field, but also to reduce the residual compressive stress. The depth of residual compressive stress field increases with the increase of impact velocity, while the magnitude of residual compressive stress field fluctuates to a certain extent, but both of them reach the maximum when the impact velocity is 200 m/s.

Key words: microparticle, shot peening, target material, residual stress field

中图分类号:

TG17

王超, 张海, 李冬飞, 云浩, 徐文苏, 赵武. 微粒子喷丸对靶材残余应力场的影响[J]. 金属热处理, 2020, 45(5): 192-198.

Wang Chao, Zhang Hai, Li Dongfei, Yun Hao, Xu Wensu, Zhao Wu. Effect of microparticle shot peening on residual stress field of target[J]. Heat Treatment of Metals, 2020, 45(5): 192-198.

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微粒子喷丸对靶材残余应力场的影响

Effect of microparticle shot peening on residual stress field of target

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