STS 347 및 STS 310S 오스테나이트계 스테인리스강의 고온 가스질화 열처리 특성 연구

The influence of high temperature gas nitriding (HTGN) in STS347 and STS310S steels was experimentally investigated. The HTGN was carried out at 1,050℃~1,150℃ for 10 hrs in a gaseous atmosphere containing 1 kg/mm2 of nitrogen. After HTGN, fine precipitates of Cr2N and NbN appeared in austenite on th...

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Published in대한금속·재료학회지, 46(11) Vol. 46; no. 11; pp. 708 - 712
Main Authors 유대경, Dae Kyoung Yoo, 공정현, Jung Hyun Kong, 이해정, Hea Joeng Lee, 성장현, Jang Hyun Sung, 이해우, Hae Woo Lee
Format Journal Article
LanguageKorean
Published 대한금속재료학회 01.12.2008
대한금속·재료학회
Subjects
Cr2N nitride
High Temperature Gas Nitriding
HTGN
STS 347
STS310S
재료공학
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ISSN1738-8228
2288-8241

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Summary:The influence of high temperature gas nitriding (HTGN) in STS347 and STS310S steels was experimentally investigated. The HTGN was carried out at 1,050℃~1,150℃ for 10 hrs in a gaseous atmosphere containing 1 kg/mm2 of nitrogen. After HTGN, fine precipitates of Cr2N and NbN appeared in austenite on the surface of STS 347, while nitrogen pearlite, which was layeredof Cr2N and austenite alternatively, appeared in austenite on the surface of STS 310S. The surface hardness of HTGN-treated, STS 347 and STS 310S specimens was 250~360 Hv and 270~400 Hv, respectively, depending on the temperature of HTGN. The nitrogen content was analyzed 1.4 wt% and 1.6 wt% at the surface layer of STS 347 and STS 310S steels, respectively. In addition, an improvement in the corrosion resistance of HTGN treated specimens was observed.
Bibliography:The Korean Institute of Metals and Materials
G704-000085.2008.46.11.004
ISSN:1738-8228
2288-8241