Nitriding Iron and 38CrMoAl Steel with a Nanostructured Surface Layer
具有纳米结构表层的纯铁和38CrMoAl钢的渗氮
查看参考文献12篇
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文摘
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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 kinetics of the SMAT samples with a nanostructured surface layer is greatly enhanced so that the nitriding temperatures can be reduced to 300℃ for iron and about 400℃ for 38CrMoAl steel, respectively, which are much lower than the conventional nitriding temperatures (above 500℃). The novel nitriding process not only facilitates reduction of torsion of the treated samples, but also provides a new approach for selective surface reactions of solids. |
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其他语种文摘
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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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来源
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中国科学院研究生院学报
,2005,22(2):230-238 【核心库】
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关键词
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nanocrystalline materials
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38CrMoAl steel
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iron
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nitriding
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surface mechanical attrition treatment
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地址
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1.
Institute of Metal Research, Chinese Academy of Sciences, Shenyang National Laboratory for Materials Science,, 辽宁, Shenyang, 110016
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LASMIS, University of Technology of Troyes, France
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1002-1175 |
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学科
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金属学与金属工艺 |
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基金
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国家自然科学基金
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国家科技部项目
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文献收藏号
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CSCD:2022762
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