金属热处理 ›› 2025, Vol. 50 ›› Issue (10): 276-282.DOI: 10.13251/j.issn.0254-6051.2025.10.045

• 表面工程 • 上一篇    下一篇

喷丸处理对30Cr3MoNiVNb钢气体渗氮的影响

吴昊轩1,2, 李秉宸1,2, 石璧琮1,2, 吴晓春1,2   

  1. 1.上海大学 材料科学与工程学院, 上海 200444;
    2.上海大学 省部共建高品质特殊钢冶金与制备国家重点实验室, 上海 200444
  • 收稿日期:2025-04-18 修回日期:2025-08-07 出版日期:2025-10-25 发布日期:2025-11-04
  • 通讯作者: 吴晓春,教授,博士,E-mail:xcwu@staff.shu.edu.cn
  • 作者简介:吴昊轩(1999—),男,硕士研究生,主要研究方向为芯棒材料表面处理,E-mail:wuhaoxuan688@163.com。

Effect of shot peening on gas nitriding of 30Cr3MoNiVNb steel

Wu Haoxuan1,2, Li Bingchen1,2, Shi Bicong1,2, Wu Xiaochun1,2   

  1. 1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;
    2. State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200444, China
  • Received:2025-04-18 Revised:2025-08-07 Online:2025-10-25 Published:2025-11-04

摘要: 利用金相显微镜、扫描电镜、X射线衍射仪、显微维氏硬度计和残余应力仪等研究了在无化合物层生成的基础上,不同喷丸强度对芯棒用30Cr3MoNiVNb钢气体渗氮的影响。结果表明,经过0.33 mmA+0.19 mmA+0.11 mmA强度组合的复合喷丸工艺后材料表面粗糙度为2.08 μm,表层晶粒得到细化,位错密度提升97.3%,形成的残余应力峰值可达-871 MPa,从而提高了氮原子的吸附面积和扩散通道,促进氮原子吸附效果。经过该喷丸强度处理后材料气体渗氮效果明显提升,渗氮层厚度可达258.3 μm,表面硬度相较于基体提升108.2%,因此该喷丸工艺为促进渗氮效果的最佳工艺。

关键词: 空心芯棒用钢, 喷丸处理, 气体渗氮

Abstract: Effect of different shot peening intensities on gas nitriding of 30Cr3MoNiVNb steel was studied on the basis of no compound layer generation by meaus of metallographic microscope, scanning electron microscope, X-ray diffractometer, micro Vickers hardness tester and residual stress tester. The results show that the surface roughness of the material is 2.08 μm after the composite shot peening processing with the intensity combination of 0.33 mmA+0.19 mmA+0.11 mmA, the surface grains are refined, the dislocation density is enhanced by 97.3%, and the peak residual stress formed can reach up to -871 MPa, which improves the adsorption area and diffusion channel of nitrogen atoms, and promotes the effect of adsorption of nitrogen atoms. After the composite shot peening processing with the aforementioned intensity combination, the gas nitriding effect of the material is improved, and the thickness of the nitrided layer can reach 258.3 μm, and the surface hardness is improved by 108.2% compared with that of the substrate, so the shot peening process is the best process to promote the nitriding effect.

Key words: hollow mandrel steel, shot peening, gas nitriding

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