| 摘要: |
| 采用双层圆筒不锈钢板组成空心阴极电极结构，作为奥氏体不锈钢渗氮的等离子体源。对AISI 316L奥氏体不锈钢分别进行常规直流离子渗氮和空心阴极等离子体源渗氮处理试验。氮化温度均为450 ℃，氮化时间为4 h。采用X射线衍射仪、金相显微镜、粗糙度仪、显微硬度仪、电化学工作站和摩擦磨损试验机等分析表征氮化试样。结果表明： 空心阴极等离子体源渗氮能够有效处理AISI 316L奥氏体不锈钢，可在表面制备5 μm厚的γN相氮化层。与传统离子渗氮相比，氮化表面硬度均一，粗糙度较低，特别是边缘效应明显降低。γN相氮化层的耐蚀性能优异，且减摩效果较好。 |
| 关键词: 边缘效应 粗糙度 腐蚀 摩擦 |
| DOI：10.3969/j.issn.1007-9289.2014.03.005 |
| 分类号: |
| 基金项目: |
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| Plasma Nitriding of AISI 316L Austenitic Stainless Steel by Hollow Cathode Discharge Source |
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LI Yang, XU Huizhong, QIU Jianxun, XU Jiujun, WANG Liang1,2
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1. Envirnmental and Materials Engineering College, Yantai University, Yantai 264005, Shandong;2. Transportation Equipment and Marine Engineering College, Dalian Maritime University, Dalian 116026, Liaoning
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| Abstract: |
| A double active screen of austenitic stainless steel was designed in this study. Hollow cathode discharge effect exiting between inner and outer layers is used as the plasma source. AISI 316L austenitic stainless steels were nitried at glow discharge and hollow cathode plasma source. Nitriding was carried out at 450 ℃ for 4 h. Nitrided samples were investigated using Xray diffraction, optical microscopy, roughometer, microhardness tester, electrochemical working station and tribometer. The results show that AISI 316L austenitic stainless steel is effectively nitrided by hollow cathode plasma source, and the γN phase nitrided layer of 5 μm can be formed on the surface. Compared with the traditional plasma nitriding, surface hardness was relatively uniformity, roughness is low, and the edge effect was reduced. The γN nitride layers have excellent corrosion resistance, and the friction effect is good. |
| Key words: edge effect roughness corrosion friction |
