Effects of ultrasonic impact treatment on surface residual stress and electrochemical properties of 42CrMo4 steel

DONG Zheng; YANG Cong; GU Bangping; YANG Yuchen; GAO Liqiang; XU Guanhua

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Effects of ultrasonic impact treatment on surface residual stress and electrochemical properties of 42CrMo4 steel

更新时间：2025-01-07

- Effects of ultrasonic impact treatment on surface residual stress and electrochemical properties of 42CrMo4 steel
- Journal of Mechanical Strength Pages: 1-7(2025)
- 作者机构：
  
  1.上海海事大学物流工程学院，上海 201306
  2.上海外高桥造船海洋工程有限公司，上海 201306
  3.浙江大学机械工程学院浙江省三维打印工艺与装备重点试验室，杭州 310027
  4.浙江大学机械工程学院流体动力基础件与机电系统全国重点实验室，杭州 310027
- 作者简介：
  
  XU Guanhua, E-mail: xuguanhua@zju.edu.cn
- 基金信息：
  
  National Natural Science Foundation of China(52105466;51805477)
- DOI：
  CLC： TG115
- Published Online：07 January 2025，
  
  Received：24 March 2024，
  
  Revised：29 April 2024，
- 稿件说明：
移动端阅览
董政，杨聪，顾邦平等.超声冲击处理对42CrMo4钢表面残余应力与电化学性能的影响［J］.机械强度，DOI：10.16579/j.issn.1001.9669.XXXX.XX.001.

DONG Zheng，YANG Cong，GU Bangping，et al.Effects of ultrasonic impact treatment on surface residual stress and electrochemical properties of 42CrMo4 steel［J］.Journal of Mechanical Strength，DOI：10.16579/j.issn.1001.9669.XXXX.XX.001.
董政，杨聪，顾邦平等.超声冲击处理对42CrMo4钢表面残余应力与电化学性能的影响［J］.机械强度，DOI：10.16579/j.issn.1001.9669.XXXX.XX.001. DOI：

DONG Zheng，YANG Cong，GU Bangping，et al.Effects of ultrasonic impact treatment on surface residual stress and electrochemical properties of 42CrMo4 steel［J］.Journal of Mechanical Strength，DOI：10.16579/j.issn.1001.9669.XXXX.XX.001. DOI：

摘要

目的

分析了不同超声冲击处理时间对42CrMo4钢试样横截面微观组织、表面残余应力、表面显微硬度以及耐腐蚀性能的影响。

结果

结果表明，超声冲击后42CrMo4钢试样表面产生了大量的塑性变形，导致硬度增加。在超声冲击8 min后，试样表面平均硬度为262.9 HV，相比于初始硬度提高了14.3%。超声冲击能够有效消除试样表面的残余拉应力，并引入残余压应力。在试验参数范围内，引入的残余压应力随着超声冲击处理时间的延长而增加。在超声冲击时间为8 min时，

轴向和

轴向的最大残余压应力分别达到-204.2 MPa和-121.5 MPa。超声冲击处理能够提高试样的耐腐蚀性能，当超声冲击时间为8 min时，试样的耐腐蚀性能最好，腐蚀电流密度下降到未处理时的12%。超声冲击通过改变金属材料的表面残余应力状态、产生晶粒细化效应、引起塑性变形等因素来改善其耐腐蚀性能。

Abstract

Objective

The effects of different ultrasonic impact treatment time on cross section microstructure

surface residual stress

surface microhardness

and corrosion resistance of 42CrMo4 steel sample was investigated.

Results

The results showed that after ultrasonic impact

a large amount of plastic deformation occurred on the surface of 42CrMo4 steel sample

which results in that the hardness could be increased. After ultrasonic impact with the time of 8 min

the average surface hardness of the sample reached 262.9 HV

14.3% higher than the initial hardness. In addition

ultrasonic impact could effectively eliminate residual tensile stress on the sample surface and introduce residual compressive stress. The introduced residual compressive stress increased with the extension of ultrasonic impact tr

eatment time within the range of experimental parameters. When the ultrasonic impact time was 8 min

the maximum residual compressive stress on the

-axis and

-axis reached -204.2 MPa and -121.5 MPa respectively. The corrosion resistance of the sample can improve after ultrasonic impact treatment. When the ultrasonic impact time was 8 min

the corrosion resistance of the sample was best

and the corrosion current density decreased to 12% of the untreated sample. Ultrasonic impact improved the corrosion resistance of the metal materials by changing the residual stress state on the surface

producing grain refinement effect and plastic deformation.

关键词

超声冲击微观组织显微硬度残余应力电化学

Keywords

Ultrasonic impact treatmentMicrostructureMicrohardnessResidual stressElectrochemical

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