超声喷丸工艺参数对42CrMo钢表面质量的影响  

Influence of ultrasonic shot peening process parameters on surface quality of 42CrMo steel

作　　者：王斯宇 谢春晓[1] 杨宇辉[1] 宋成浩 隆志力 黄浦东 WANG Si-yu;XIE Chun-xiao;YANG Yu-hui;SONG Cheng-hao;LONG Zhi-li;HUANG Pu-dong(School of Mechanical Engineering,Dongguan University of Technology,Dongguan 523808,China;School of Mechanical Engineering and Automation,Harbin Institute of Technology,Shenzhen,Shenzhen 518055,China)

机构地区：[1]东莞理工学院机械工程学院,广东东莞523808 [2]哈尔滨工业大学(深圳)机电工程与自动化学院,广东深圳518055

出　　处：《塑性工程学报》2024年第5期71-78,共8页Journal of Plasticity Engineering

基　　金：国家自然科学基金青年基金资助项目(52204384);广东省重点领域研发计划(2020B090926001);东莞市科技特派员项目(20221800500092)。

摘　　要：通过单因素试验法研究了超声喷丸工艺对42CrMo超高强度钢表面质量的影响,对42CrMo钢超声喷丸处理前后的表面粗糙度、表面硬度、截面显微硬度和微观组织进行了表征分析。结果表明,随着喷丸时间的延长,表面粗糙度和表面硬度逐渐增大直至稳定,稳定值分别为1.08μm和433.60 HV;超声振幅、弹丸直径的增加和喷丸距离的减小可以有效地提升试样的超声喷丸强度,在试样表面产生更加剧烈的塑性变形,虽然提高了表面粗糙度,但是获得了深度更大的硬化层和梯度结构晶粒细化层,分别为2.8 mm和40μm。The effect of ultrasonic shot peening process on the surface quality of 42CrMo ultra-high strength steel was studied by single factor experiment.The surface roughness,surface hardness,section microhardness and microstructure of 42CrMo steel before and after ultrasonic shot peening were characterized and analyzed.The results show that with the extension of shot peening time,the surface roughness and surface hardness gradually increase until stable,the stable values are 1.08μm and 433.60 HV,respectively.The increase of ultrasonic amplitude and projectile diameter and the decrease of shot peening distance can effectively increase the intensity of ultrasonic shot peening of samples,and produce more severe plastic deformation on the sample surface.Although the surface roughness is improved,the deeper hardening layer and the grain refinement layer with gradient structure are obtained,which are 2.8 mm and 40μm,respectively.

关 键 词：超声喷丸 42CRMO钢 表面粗糙度 显微硬度 微观组织 

分 类 号：TG176[金属学及工艺—金属表面处理]