Constituted oxides/nitrides on nitriding 304, 430 and 17-4 PH stainless steel in salt baths over the temperature range 723 to 923 K

Teng Shih Shih, Yung Sen Huang, Chi Fan Chen

研究成果: 雜誌貢獻期刊論文同行評審

13 引文 斯高帕斯(Scopus)

摘要

The progressively developed oxides and nitrides that form on nitriding 304, 430 and 17-4 PH stainless steel are analysed by X-ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS) in this study. The experimental results show that the Cr contents and matrix structures (ferrite, austenite and martensite) play an important role in forming FeCr 2 O 4 , Cr 2 O 3 and Fe 2 O 3 oxides as well as nitrides. After a short immersion time, oxides of Cr 2 O 3 and FeCr 2 O 4 form in nitride films on 304 stainless steel samples. Fe 2 O 3 oxide will subsequently form following an increasing immersion time. For the 430 stainless steel, Cr 2 O 3 predominately forms after a short dipping time which hinders the growth of the nitride layer. As a result, this sample had the thinnest nitride film of the three for a given immersion time. After the formation of oxides, both CrN and Cr 2 N were detected near the surface of the nitride films of three samples while Cr 2 N phases formed in the deeper zone. The greatest amount of Fe 2 O 3 oxide among the three samples was obtained on the nitriding 17-4 PH stainless steel which also had a high intensity count of N 1s.

原文???core.languages.en_GB???
頁(從 - 到)81-88
頁數8
期刊Applied Surface Science
258
發行號1
DOIs
出版狀態已出版 - 15 10月 2011

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