| 具有纳米结构表层的纯铁和38CrMoAl钢的渗氮(英文) |
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| 作者姓名： | 佟伟平 陶乃垅 王镇波 吕坚 卢柯 |
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| 作者单位： | 1. 中国科学院金属研究所, 沈阳材料科学国家( 联合) 实验室, 沈阳 110016;
2. 东北大学材料电磁过程研究教育部重点实验室, 沈阳 110004;
3. 法国特鲁瓦工业大学, 特鲁瓦 |
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| 基金项目： | supportedbyNNSFofChina (5 0 0 2 110 1) ;MinistryofScienceandTechnologyofChina (G19990 64 5 0 5 ) |
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| 摘 要： | 通过表面机械研磨技术(SMAT),在纯铁和38CrMoAl钢样品表面产生大量的塑性应变,致使其表层晶粒细化至纳米量级.随后的气体渗氮实验表明,纳米纯铁和38CrMoAl钢发生渗氮反应的温度大大低于传统粗晶材料(>500℃),分别降至约300℃和400℃.这种低温渗氮过程不仅有利于降低渗氮工件的变形和能耗,也为选择性渗氮技术的实现提供了新途径.
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| 关 键 词： | 纳米材料 38CrMoAl钢 铁 渗氮 表面机械研磨 |
| 收稿时间： | 2004-08-04 |
Nitriding Iron and 38CrMoAl Steel with a Nanostructured Surface Layer |
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| Authors: | TONG Wei-Ping TAO Nai-Rong WANG Zhen-Bo Lv Jian LU KE |
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| Institution: | 1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
2. The Key Laboratory of National Education Ministry for Electromagnetic Pr ocessing of Materials, Northeastern University, Shenyang 110004, China;
3. LASMIS, University of Technology of Troyes, Troyes, France |
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| Abstract: | The microstructure of the surface layer on a pure iron and a 38CrMoAl steel samples was refined into the nanometer scale by means of the surface mechanical attrition treatment ( SMAT) that generates repetitive severe plastic deformation in the surface layer. The subsequent nitriding kinet ics of the SMAT samples with a nanostructured surface layer is greatly enhanced so that the nitriding temperatures can be reduced to 300 e for iron and about 400 e for 38CrMoAl steel, respectively, which are much lower than the convent ional nitriding temperatures ( above 500 e ). The novel nitriding process not only facilitates reduction of torsion of the treated samples, but also provides a new approach for select ive surface reactions of solids. |
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| Keywords: | nanocrystalline materials 38CrMoAl steel iron nitriding surface mechanical attrition treatment |
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