杨九州,李立,张敏,周少兰,詹青青,黄安畏,杨莉婕,陈汉宾,李忠盛.离子渗氮对多弧离子镀CrN涂层摩擦学性能的影响[J].表面技术,2022,51(11):262-270.
YANG Jiu-zhou,LI Li,ZHANG Min,ZHOU Shao-lan,ZHAN Qing-qing,HUANG An-wei,YANG Li-jie,CHEN Han-bin,LI Zhong-sheng.Effects of Ion Nitriding on Tribological Performance of CrN Coating by Multi-arc Ion Plating[J].Surface Technology,2022,51(11):262-270 |
| 离子渗氮对多弧离子镀CrN涂层摩擦学性能的影响 |
| Effects of Ion Nitriding on Tribological Performance of CrN Coating by Multi-arc Ion Plating |
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| DOI：10.16490/j.cnki.issn.1001-3660.2022.11.024 |
| 中文关键词: 离子渗氮 多弧离子镀 CrN涂层 摩擦磨损 渗镀复合 硬度梯度 |
| 英文关键词:ion nitriding multi-arc ion plating CrN coating frictional wear nitriding and deposition hardness gradient |
| 基金项目: |
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| Author | Institution |
| YANG Jiu-zhou | Southwest Technology and Engineering Research Institute, Chongqing 401329, China |
| LI Li | Southwest Technology and Engineering Research Institute, Chongqing 401329, China |
| ZHANG Min | Southwest Technology and Engineering Research Institute, Chongqing 401329, China |
| ZHOU Shao-lan | Southwest Technology and Engineering Research Institute, Chongqing 401329, China |
| ZHAN Qing-qing | Southwest Technology and Engineering Research Institute, Chongqing 401329, China |
| HUANG An-wei | Southwest Technology and Engineering Research Institute, Chongqing 401329, China |
| YANG Li-jie | Yucai Middle School, Chongqing 400031, China |
| CHEN Han-bin | Southwest Technology and Engineering Research Institute, Chongqing 401329, China |
| LI Zhong-sheng | Southwest Technology and Engineering Research Institute, Chongqing 401329, China |
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| 中文摘要: |
| 目的 采用离子渗氮技术强化40Cr钢基体，以提高大载荷条件下基体表面CrN涂层的耐磨性能。方法 首先采用离子渗氮技术强化40Cr钢基体，再采用多弧离子镀在强化后的基体表面上沉积硬质CrN涂层。采用金相显微镜和扫描电镜观察分析基体和涂层的微观形貌，采用划痕试验测试涂层与基体的结合力，采用维氏硬度表征涂层及基体不同深度的硬度，通过大载荷摩擦磨损试验研究基体强化对涂层耐磨性的影响。结果 经离子渗氮后，40Cr钢基体的表面硬度由380HV提高至879HV，渗层深度达到0.30 mm；多弧离子镀CrN涂层的表面硬度为2 380HV，厚度为33 μm，涂层的结合力达到37.79 N。摩擦磨损试验结果表明，40Cr钢基体的平均摩擦因数为0.92，磨损量为43.1 mg，磨痕宽度和深度分别为1 805、224 μm；经离子渗氮后40Cr钢基体的平均摩擦因数为0.68，磨损量为28.4 mg，磨痕的宽度和深度分别为1 260、156 μm；未强化基体表面CrN涂层的平均摩擦因数为0.55，磨损量为19.4 mg，磨痕的宽度和深度分别为884、89 μm，在摩擦磨损试验中出现了涂层剥落失效现象；经强化后基体表面CrN涂层的平均摩擦因数为0.42，磨损量为2.6 mg，磨痕的宽度和深度分别为328、16 μm，未出现涂层剥落现象。结论 采用离子渗氮强化基体的方法，使基体、渗氮层、CrN涂层形成了硬度梯度，提高了多弧离子镀CrN涂层的耐磨性能，避免在大载荷条件下出现因基体变形引起的涂层脱落失效。 |
| 英文摘要: |
| The work aims to improve the wear resistance of the CrN coating on 40Cr steel substrate under high load conditions through substrate strengthen with ion nitriding. In this paper, the 40Cr steel substrate was first strengthened with ion nitriding, then CrN coating was deposited on the reinforced substrate by multi-arc ions plating. The metallographic microscope and scanning electron microscope were used to analyze the microstructure of the substrate and coating. The combined strength of the coating and the substrate was tested by scratch test. The hardness of the coating and the substrate was tested with a Vickers hardness meter. The effect of base reinforcement on wear resistance of coating was studied by large load friction wear test and Vickers hardness characterization of different depths of the substrate. The results showed that, the surface hardness of the 40Cr steel substrate was increased from 380HV to 879HV after ion nitriding, the depth of the diffusion layer reached 0.30 mm. The surface hardness of the multi-arc ion-plated CrN coating was 2 380HV, the thickness was 33 μm, and the coating binding force was 37.79 N. The average friction coefficient of 40Cr steel substrate was 0.92, the wear was 43.1 mg, and the width and depth of the abrasive marks were 1 805 μm and 224 μm respectively. After ion nitriding, the average friction coefficient of the 40Cr steel substrate after ion nitriding was 0.68, and the wear was 28.4 mg, the wear width and depth were 1 260 μm and 156 μm respectively. After multi-arc ion-plating on the original substrate, the average friction coefficient of the unfortified substrate surface CrN coating was 0.55, the wear was 19.4 mg, and the wear width and depth were 884 μm and 89 μm respectively. In the friction and wear samples, the content of lumps in the transition zone was close to that on the coating surface. It was speculated that the lumps in the transition zone were coating residues, and the bottom of the transition zone was mainly base and a small amount of coating residues. At the bottom of the wear area, the coating has crossed the coating to the substrate. The cracks of the whole coating in the crushing area were sharp and there was no ductile crimping, indicating that the CRN coating of this sample had brittle fracture. It showed that CrN coating did not play a good role in resisting wear. On the reinforced substrate, the average friction coefficient of the CrN coating was 0.42, the wear was 2.6 mg, and the wear width and depth were 328 μm and 16 μm, respectively. In this sample, the CrN coating showed good wear resistance because the base had sufficient strength to support the CRN coating. It showed that the base had an indirect effect on improving the wear resistance of the coating. It is concluded that the substrate, nitriding layer and CrN coating form a hardness gradient, which improves the wear resistance of the multi-arc ion plating CrN coating and avoids the failure of the coating peeling caused by the large load friction. |
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