STUDY ON THE EFFECT OF SURFACE COMPOSITE STRENGTHENING ON THE SURFACE INTEGRITY OF 18CrNiMo7⁃6 CARBURIZED GEAR STEEL

WANG Zhen; SUN Hao; CUI YiLong; LI LinYan; WANG Tao; HAN JiaoBao

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STUDY ON THE EFFECT OF SURFACE COMPOSITE STRENGTHENING ON THE SURFACE INTEGRITY OF 18CrNiMo7⁃6 CARBURIZED GEAR STEEL

更新时间：2024-06-04

- STUDY ON THE EFFECT OF SURFACE COMPOSITE STRENGTHENING ON THE SURFACE INTEGRITY OF 18CrNiMo7⁃6 CARBURIZED GEAR STEEL
- Journal of Mechanical Strength Pages: 1-12(2024)
- 作者机构：
  
  1.郑州航空工业管理学院自动化学院，郑州 450046
  2.Zhengzhou Research Institute of Mechanical Engineering Co.， Ltd.， Zhengzhou 450001， China
- 作者简介：
  
  WANG Zhen， E-mail： wangzhen@zua.edu.cn
- 基金信息：
- DOI：
  CLC： TG668;TB115
- Published Online：03 June 2024，
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王振,孙浩,崔义龙等.表面复合强化对18CrNiMo7-6渗碳齿轮钢表面完整性的影响研究[J].机械强度,

WANG Zhen,SUN Hao,CUI YiLong,et al.STUDY ON THE EFFECT OF SURFACE COMPOSITE STRENGTHENING ON THE SURFACE INTEGRITY OF 18CrNiMo7⁃6 CARBURIZED GEAR STEEL[J].Journal of Mechanical Strength,
王振,孙浩,崔义龙等.表面复合强化对18CrNiMo7-6渗碳齿轮钢表面完整性的影响研究[J].机械强度, DOI：10.16579/j.issn.1001-9669...001.

WANG Zhen,SUN Hao,CUI YiLong,et al.STUDY ON THE EFFECT OF SURFACE COMPOSITE STRENGTHENING ON THE SURFACE INTEGRITY OF 18CrNiMo7⁃6 CARBURIZED GEAR STEEL[J].Journal of Mechanical Strength, DOI：10.16579/j.issn.1001-9669...001.

摘要

喷丸强化工艺广泛应用于齿轮等基础零部件的制造过程，其自身局限性限制了工件表面完整性的提升。为进一步提升工件表面完整性，采用数值模拟与试验相结合的方法，研究二次喷丸、喷丸-超声滚压等两种表面复合强化工艺对18CrNiMo7-6渗碳齿轮钢试样表面完整性的影响效果，主要分析两种复合强化工艺对喷丸强化试样表面完整性的改善效果。结果表明，二次喷丸强化试样残余压应力最大值为1 359.56 MPa，位于0.08 mm的深度位置。喷丸-超声滚压强化试样残余压应力最大值为1 329.05 MPa，位于0.25 mm的深度位置。相较于单次喷丸强化试样，二次喷丸强化试样和喷丸-超声滚压强化试样，表面粗糙度分别下降29.42%和62.76%，表面显微硬度分别提升8.70%和17.60%，表面结点残余压应力值标准差分别下降23.36%和89.50%。喷丸-超声滚压强化工艺在提升试样表面硬度、残余应力层厚度和残余压应力均匀性以及降低表面粗糙度等方面效果更显著，能够有效改善喷丸强化试样的表面完整性。

Abstract

Shot peening process is widely used in the manufacturing process of gears and other basic components， and its own limitations limit the enhancement of the surface integrity of the workpiece. In order to further improve the surface integrity of the workplece， A combination of numerical simulation and experimental methods was utilized to study the effect of two surface composite strengthening processes， such as double shot peening and shot peening-ultrasonic rolling， on the surface integrity of 18CrNiMo7-6 carburization gear steel samples， and mainly analyzed the effect of the two composite strengthening processes on the improvement of surface integrity of the shot peened samples. The results show that the maximum value of the residual compressive stress of the double shot peening sample is 1 359.56 MPa， locates at the depth of 0.08 mm， and the maximum value of the residual compressive stress of the shot peening-ultrasonic rolling peening sample is 1 329.05 MPa， locates at the depth of 0.25 mm. Compare with the single shot peening sample， the surface roughness of the double shot peening sample and the shot peening-ultrasonic rolling sample is 29.42% and 29.42% lower than that of the single shot peening sample. Compare with the single shot peening samples， the surface roughness of the double shot peening samples and shot peening-ultrasonic tumbling peening samples decreases by 29.42% and 62.76%， respectively， the surface microhardness increases by 8.70% and 17.60%， and the standard deviation of the surface node compressive residual stress value decreases by 23.36% and 89.50%. The shot peening-ultrasonic rolling process is more effective in enhancing the surface hardness， thickness of the residual stress layer and uniformity of the residual compressive stress， as well as reducing the surface roughness of the specimens， and can effectively improve the surface integrity of the shot peened samples.

关键词

18CrNiMo7⁃6钢喷丸超声滚压表面完整性

Keywords

18CrNiMo7⁃6 steelShot peeningUltrasonic rollingSurface integrity

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