PLASMA NITRIDING OF FE-18CR-9NI IN THE RANGE OF 723-823-K

被引：19

作者：

KUWAHARA, H

MATSUOKA, H

TAKADA, J

KIKUCHI, S

TOMII, Y

TAMURA, I

机构：

[1] KYOTO UNIV,DEPT MET SCI & TECHNOL,SAKYO KU,KYOTO 606,JAPAN

[2] OKAYAMA UNIV,DEPT APPL CHEM,OKAYAMA 700,JAPAN

来源：

OXIDATION OF METALS | 1991年 / 36卷 / 1-2期

关键词：

PLASMA NITRIDING; FE-18CR-9NI; CRN PRECIPITATES; NITROGEN DIFFUSION; KINETICS;

D O I：

10.1007/BF00938459

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

To clarify the mechanism of plasma nitriding, we examined the optical micro-structure, the hardness, the precipitation, and the concentration of dissolved nitrogen in Fe-18Cr-9Ni nitrided using plasma in the range of 723-823 K. Compared with ammonia-gas nitriding, the features of plasma nitriding are the formation of small chromium-nitride precipitates (CrN), the absence of an externally nitrided layer, the high concentration of dissolved nitrogen, and the high hardness (HV = 1200). The diffusion coefficient of nitrogen in the present alloy was determined using the growth rate of the internally nitrided layer, based on calculations used in internal oxidation. Plasma- and gas-nitriding were also compared with respect to the growth rate of the nitrided layer.

引用

页码：143 / 156

页数：14

共 18 条

[1]

BLANTER ME, 1950, ZH TEKH FIZ+, V20, P217

[2] INVESTIGATION OF PLASMA-NITRIDED AUSTENITIC STAINLESS-STEEL BY SEM, WDX AND X-RAY-DIFFRACTION [J].

CHUNG, MF ;

LIM, YK .

SCRIPTA METALLURGICA, 1986, 20 (06) :807-812

[3]

ECKEL JF, 1968, J MATER, V3, P605

[4]

Fry A., 1923, STAHL EISEN, V43, P1271

[5]

GRIEVESON P, 1964, T METALL SOC AIME, V230, P407

[6]

KNUPPEL H, 1958, STAHL EISEN, V78, P1871

[7] AMMONIA GAS NITRIDING OF FE-18CR-9NI ALLOY AT LOWER THAN 823-K [J].

KUWAHARA, H ;

MATSUOKA, H ;

TAKADA, J ;

KIKUCHI, S ;

TOMII, Y ;

TAKAYAMA, T .

JOURNAL OF MATERIALS SCIENCE, 1990, 25 (09) :4120-4124

[8]

KUWAHARA H, IN PRESS J MATERIALS

[9]

KUWAHARA H, 1985, 7TH P INT S PLASM CH, P473

[10]

MATSUMOTO H, 1987, P 101 JAP I MET, P489

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