常规喷丸和微粒喷丸工艺对42CrMo钢表面性能的影响  

Influence of Conventional Shot Peening and Micro-Particle Peening Processes on the Surface Properties of 42CrMo Steel

作　　者：黄怀玉 张富林 王光宏 李欣硕 钱沁朗 邹伟 曹禹凡 刘奇 陈永镇 程震 HUANG Huaiyu;ZHANG Fulin;WANG Guanghong;LI Xinshuo;QIAN Qinlang;ZOU Wei;CAO Yufan;LIU Qi;CHEN Yongzhen;CHENG Zhen(School of Mechatronic Engineering,Jiangsu Normal University,Xuzhou 221116,China;Jiangsu Normal University KeWen College,Xuzhou 221132,China;Tianjin Ten Elements Metal Products Co.,Ltd.,Tianjin 300357,China;CNBM Hefei Mechanical&Electrical Engineering Technology Co.,Ltd.,Hefei 230051,China)

机构地区：[1]江苏师范大学机电工程学院,江苏徐州221116 [2]江苏师范大学科文学院,江苏徐州221132 [3]天津十元素金属制品有限公司,天津300357 [4]中建材(合肥)机电工程技术有限公司,安徽合肥230051

出　　处：《材料保护》2024年第11期101-109,共9页Materials Protection

基　　金：广东省级海洋产业发展专项(粤自然资合[2023]51);江苏省自然科学基金(BK20220680);江苏省研究生科研与实践创新计划项目(KYCX24_3060)。

摘　　要：为了研究常规喷丸和微粒喷丸2种工艺对42CrMo钢表面性能的影响,利用ABAQUS软件通过正交试验确定了这2种工艺对材料表面粗糙度和残余压应力层深的主次影响因素。根据正交试验的分析结果,开展了一定的实际试验验证。考虑微粒喷丸和常规喷丸的特点,针对喷丸覆盖率单因素研究了2种工艺对42CrMo钢残余应力、表面粗糙度和等效塑性应变的影响。结果表明:微粒喷丸在相同覆盖率条件下能够获得更大的残余压应力、更低的表面粗糙度和更高的等效塑性应变,但强化层深度稍浅。残余压应力的提高有助于提高材料的耐磨损和抗疲劳性能,而较低的表面粗糙度有助于降低裂纹的萌生,更高的等效塑性应变可以进一步细化晶粒,同时有利于产生残余压应力,说明微粒喷丸在机械零部件的表面强化上具有广阔的应用前景。To investigate the effects of conventional shot peening and micro-particle shot peening on the surface properties of 42CrMo steel,ABAQUS software was employed to identify the primary and secondary influencing factors of these two processes on material surface roughness and the depth of the residual stress layer through orthogonal experiments.Based on the analysis results of the orthogonal experiments,practical experiments were conducted for validation.Considering the characteristics of micro-particle shot peening and conventional shot peening,a single-factor study of the shot peening coverage rate was carried out to examine the impact of these two processes on the residual stress,surface roughness and equivalent plastic strain of 42CrMo steel.Results showed that under the same coverage rate condition,micro-particle shot peening yielded higher residual compressive stress,lower surface roughness and higher equivalent plastic strain compared to conventional shot peening,accompanied by a slightly shallower strengthening layer.The increase in residual compressive stress contributed to improving wear resistance and fatigue performance of the material,while the lower surface roughness contributed to restraining crack initiation.Higher equivalent plastic strain could further refine grains and promote the generation of residual compressive stress.These advantages suggested the broad prospects of micro-particle shot peening in the surface strengthening of mechanical components.

关 键 词：喷丸 42CRMO钢 正交试验 残余应力 粗糙度 

分 类 号：TG178[金属学及工艺—金属表面处理]