| 引用本文: | 李杨,徐久军,王亮.42CrMo钢表面纳米化对离子渗氮的影响[J].中国表面工程,2010,(3):60~63 |
| LI Yang,Xu Jiu-Jun,WAN Liang.Plasma Nitriding of 42CrMo Steel with a Nanostructured Surface Layer Induced by Surface Mechanical Attrition Treatment[J].China Surface Engineering,2010,(3):60~63 |
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| 摘要: |
| 用表面机械研磨处理(SMAT)对42CrMo钢进行表面纳米化处理.对SMAT处理前后的样品进行离子氮化处理.通过扫描电镜、金相显微镜、X射线衍射和显微硬度计对渗氮处理后样品的结构和性能进行了表征.结果表明:在相同的氮化条件下,特别在低温下,经SMAT处理后的42CrMo钢可以得到化合物层更厚、硬度更高的氮化层. |
| 关键词: 离子渗氮 42 CrMo钢 纳米材料 表面机械研磨处理 |
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| Plasma Nitriding of 42CrMo Steel with a Nanostructured Surface Layer Induced by Surface Mechanical Attrition Treatment |
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LI Yang,Xu Jiu-Jun,WAN Liang
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Department of Materials Science and Engineering, Dalian Maritime University, Dalian 116026
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| Abstract: |
| A plastic deformation surface layer with nanocrystalline grains was produced on 42CrMo steel by means of surface mechanical attrition treatment (SMAT). Plasma nitriding of SMAT and coarse–grained 42CrMo steel was carried out by a low–frequency pulse (40 kHz) excited plasma unit. A series of nitriding experiments has been conducted at temperatures ranging from 430 to 500°C for 8 h in gas composition of NH3. The effect of SMAT pretreatment on the microstructure and properties of the 42CrMo steel was investigated using X–ray diffraction, scanning electron microscopy and Vickers micro–hardness tester. The results showed that a much thicker compound layer with higher hardness was obtained for the SMAT samples when compared with coarse–grained samples after nitriding at the low temperature. |
| Key words: plasma nitriding 42CrMo steel nanocrystalline materials surface mechanical attrition treatment |
