Low-Temperature Nitriding by Means of SMAT
来源期刊：材料热处理学报2004年第5期
论文作者：J.Lu H.W.Zhang Z.B.Wang K.Lu N.R.Tao
关键词：Nanocrystalline materials; Nitriding; Surface mechanical attrition treatment;
摘 要：The microstructure in the surface layer of iron and steel samples can be refined at the nanometer scale by means of a surface mechanical attrition treatment (SMAT) that generates repetitive severe plastic deformation to the surface layer.The subsequent nitriding kinetics of the as-treated samples with the nanostructured surface layer is greatly enhanced so that the nitriding temperatures can be reduce to 300 ～ 400 ℃ regions. This enhanced processing method demonstrates both the technological significance of nanomaterials in advancing the traditional processing techniques, and provides a new approach for selective surface reactions in solids. This article reviews the present state of the art in this field. The microstructure and properties of SMAT samples nitrided will be summarized. Further considerations of the development and applications of this new technique will also be presented.
W.P.Tong1，J.Lu3，H.W.Zhang4，Z.B.Wang4，K.Lu4，N.R.Tao4
(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 Ministryfor Electromagnetic Processing of Materials,Northeastern University, Shenyang 110004, China;
3.LASMIS, University of Technology of Troyes, 10000, Troyes, France;
4.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China)
摘要:The microstructure in the surface layer of iron and steel samples can be refined at the nanometer scale by means of a surface mechanical attrition treatment (SMAT) that generates repetitive severe plastic deformation to the surface layer.The subsequent nitriding kinetics of the as-treated samples with the nanostructured surface layer is greatly enhanced so that the nitriding temperatures can be reduce to 300 ～ 400 ℃ regions. This enhanced processing method demonstrates both the technological significance of nanomaterials in advancing the traditional processing techniques, and provides a new approach for selective surface reactions in solids. This article reviews the present state of the art in this field. The microstructure and properties of SMAT samples nitrided will be summarized. Further considerations of the development and applications of this new technique will also be presented.
关键词:Nanocrystalline materials; Nitriding; Surface mechanical attrition treatment;
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