Phase identification during aging of some nitrided ferrous materials

被引：9
作者：
Hinojosa, G
Oseguera, J
Schabes-Retchkiman, PS
机构：
[1] DIA, CEM, ITESM, Atizapan de Zaragoza 52926, Mexico
[2] Ctr Nucl Dr Nabor Carrillo, ININ, Ocoyoacac 52045, Mexico, Mexico
[3] Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
来源：
THIN SOLID FILMS | 1999年 / 349卷 / 1-2期
关键词：
microwave nitriding; high resolution electron microscopy; iron nitride phases;
D O I：
10.1016/S0040-6090(99)00196-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A characterization study of the phases formed during aging of ferrous materials nitrided in a microwave post-discharge was performed by microhardness, electron microscopy (SEM, TEM and HREM) and X-ray diffraction. Iron and AISI-1010 steel samples were microwave nitrided for 10 min at 840 K and then quenched in Ar at 273 K. The quenched samples were then annealed for treatment times ranging from 0.5 h to 8 h at 673 K. The results from the microstructural characterization of steel show the presence of a compact surface layer composed of epsilon nitride (Fe-2-N-3). For iron, Fe4N needles appeared underneath the surface after nitriding. During annealing, the amount, size and morphology of the needles change as the treatment time progresses. The presence of Fe16N2 was also detected after aging. The amount of this phase increases with aging time. The microhardness measurements correlate with the microstructural changes. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：171 / 175
页数：5
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