Yun Qingwen,Wu Xinyu,Chen Qiuyu,et al.Research on nitriding-oxidizing complex surface modification of 30CrMnSiA structural steel[J].Plating & Finishing,2025,(02):67-73.
doi: 10.3969/j.issn.1001-3849.2025.02.01030CrMnSiA结构钢表面渗氮-氧化复合改性研究
- Title:
- Research on nitriding-oxidizing complex surface modification of 30CrMnSiA structural steel
- 关键词:
- 结构钢; 多功能改性层; 防腐耐磨; 低温等离子体渗氮; 30CrMnSiA钢
- Keywords:
- structural steel; multifunctional modified layer; corrosion and wear resistance; low-temperature plasma nitriding; 30CrMnSiA steel
- 分类号:
- TG174.44
- 文献标志码:
- A
- 摘要:
- 本文以30CrMnSiA结构钢为研究对象，利用低温等离子体渗氮及低温渗氮-低温氧化复合技术对其进行表面改性研究，重点研究了氧化时间对渗氮30CrMnSiA钢表面组织结构和性能的影响。采用扫描电子显微镜、X射线衍射仪分析渗氮层及渗氮-氧化复合改性层的表面形貌、截面组织和相结构；利用维氏硬度计、摩擦磨损试验机和电化学工作站对渗氮层及复合改性层的硬度、耐磨性和耐蚀性进行评价。结果表明，渗氮层表面主要由ε-Fe2-3N、γ’-Fe4N和αN相组成，经不同时间的氧化处理后，渗氮层表面生成Fe3O4相和Fe2O3相；随着氧化时间的延长，氧化物的含量增大，表面硬度增大，最大可达1 012 HV0.05，改性层的有效硬化层厚度约为200 μm；在防腐耐磨方面，渗氮层和渗氮-氧化复合改性层的耐磨性和耐蚀性均显著提高，且短时间氧化的复合改性层具有更好的耐磨性和耐蚀性。
- Abstract:
- Taking 30CrMnSiA structural steel as the research object, low-temperature plasma nitriding and low-temperature nitriding - low-temperature oxidizing complex technology were used to its surface modification. The research focuses on the influence of oxidation time on the surface microstructure and properties of the nitrided 30CrMnSiA steel. The surface morphology, cross-sectional microstructure and phase structure of the nitrided layer as well as the nitriding-oxidizing complex modified layers were analyzed by scanning electron microscope and X-ray diffractometer. The hardness, friction and wear resistance as well as corrosion resistance of the modified layer were examined by using the Vickers hardness tester, friction and wear tester, and electrochemical workstation. The surface of the nitrided layer is mainly composed of ε-Fe2-3N, γ’-Fe4N and αN phases, and after oxidation treatment for different times, Fe3O4 phase and Fe 2O3 phase are formed on the surface of the modified layer, and with the extension of oxidation time, the content of oxides increases, and the surface hardness can be increased to 1 012 HV 0.05. The effective hardened layer of the modified layer is about 200 μm. In terms of corrosion and wear resistance, the wear resistance and corrosion resistance of the nitrided layer and nitriding-oxidizing complex modified layer are significantly improved, and the complex modified layer that obtained under short-term times shows the better wear resistance and corrosion resistance
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