Effect of solute content on plasma nitriding behavior of Fe-Cr alloys

Wei Yan Lin; Shigetoshi Okada; Jun Takada; Hideyuki Kuwahara; Susumu Nishikawa; Toshihiko Hama

doi:10.2497/jjspm.43.331

Effect of solute content on plasma nitriding behavior of Fe-Cr alloys

Wei Yan Lin, Shigetoshi Okada, Jun Takada, Hideyuki Kuwahara, Susumu Nishikawa, Toshihiko Hama

Faculty of Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Fe-Cr alloys with 3.0 to 18.6wt%Cr were plasma-nitrided at 650°C for 16h in a mixed gas of N₂:H₂=1:3. A nitriding layer, which is so called "internal nitriding layer", was formed parallel to the specimen surface, but the formation of a surface nitriding layer of γ′-Fe4N was not observed. The Cr nitride formed in the nitriding layer was determined by XRD experiments to be CrN, not Cr2N. The hardness Hv of the nitriding layer increased as the Cr content increased. The hardness increase is due to the dispersion of fine CrN particles in α-Fe matrix. The thickness of the nitriding layer decreased linearly as the Cr content increased.

Original language	English
Pages (from-to)	331-335
Number of pages	5
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	43
Issue number	3
DOIs	https://doi.org/10.2497/jjspm.43.331
Publication status	Published - Mar 1996

Keywords

CrN
Dispersion-strengthening
Fe-Cr alloys
Hardness distribution
Internal nitriding
Plasma-nitriding

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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title = "Effect of solute content on plasma nitriding behavior of Fe-Cr alloys",

abstract = "Fe-Cr alloys with 3.0 to 18.6wt%Cr were plasma-nitrided at 650°C for 16h in a mixed gas of N2:H2=1:3. A nitriding layer, which is so called {"}internal nitriding layer{"}, was formed parallel to the specimen surface, but the formation of a surface nitriding layer of γ′-Fe4N was not observed. The Cr nitride formed in the nitriding layer was determined by XRD experiments to be CrN, not Cr2N. The hardness Hv of the nitriding layer increased as the Cr content increased. The hardness increase is due to the dispersion of fine CrN particles in α-Fe matrix. The thickness of the nitriding layer decreased linearly as the Cr content increased.",

keywords = "CrN, Dispersion-strengthening, Fe-Cr alloys, Hardness distribution, Internal nitriding, Plasma-nitriding",

author = "Lin, {Wei Yan} and Shigetoshi Okada and Jun Takada and Hideyuki Kuwahara and Susumu Nishikawa and Toshihiko Hama",

year = "1996",

month = mar,

doi = "10.2497/jjspm.43.331",

language = "English",

volume = "43",

pages = "331--335",

journal = "Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy",

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T1 - Effect of solute content on plasma nitriding behavior of Fe-Cr alloys

AU - Lin, Wei Yan

AU - Okada, Shigetoshi

AU - Takada, Jun

AU - Kuwahara, Hideyuki

AU - Nishikawa, Susumu

AU - Hama, Toshihiko

PY - 1996/3

Y1 - 1996/3

N2 - Fe-Cr alloys with 3.0 to 18.6wt%Cr were plasma-nitrided at 650°C for 16h in a mixed gas of N2:H2=1:3. A nitriding layer, which is so called "internal nitriding layer", was formed parallel to the specimen surface, but the formation of a surface nitriding layer of γ′-Fe4N was not observed. The Cr nitride formed in the nitriding layer was determined by XRD experiments to be CrN, not Cr2N. The hardness Hv of the nitriding layer increased as the Cr content increased. The hardness increase is due to the dispersion of fine CrN particles in α-Fe matrix. The thickness of the nitriding layer decreased linearly as the Cr content increased.

AB - Fe-Cr alloys with 3.0 to 18.6wt%Cr were plasma-nitrided at 650°C for 16h in a mixed gas of N2:H2=1:3. A nitriding layer, which is so called "internal nitriding layer", was formed parallel to the specimen surface, but the formation of a surface nitriding layer of γ′-Fe4N was not observed. The Cr nitride formed in the nitriding layer was determined by XRD experiments to be CrN, not Cr2N. The hardness Hv of the nitriding layer increased as the Cr content increased. The hardness increase is due to the dispersion of fine CrN particles in α-Fe matrix. The thickness of the nitriding layer decreased linearly as the Cr content increased.

KW - CrN

KW - Dispersion-strengthening

KW - Fe-Cr alloys

KW - Hardness distribution

KW - Internal nitriding

KW - Plasma-nitriding

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Effect of solute content on plasma nitriding behavior of Fe-Cr alloys

Abstract

Keywords

ASJC Scopus subject areas

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