收稿日期: 2004-08-04
网络出版日期: 2005-03-15
基金资助
supportedbyNNSFofChina (5 0 0 2 110 1) ;MinistryofScienceandTechnologyofChina (G19990 64 5 0 5 )
Nitriding Iron and 38CrMoAl Steel with a Nanostructured Surface Layer
Received date: 2004-08-04
Online published: 2005-03-15
佟伟平 , 陶乃垅 , 王镇波 , 吕坚 , 卢柯 . 具有纳米结构表层的纯铁和38CrMoAl钢的渗氮(英文)[J]. 中国科学院大学学报, 2005 , 22(2) : 230 -238 . DOI: 10.7523/j.issn.2095-6134.2005.2.017
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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