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http://dx.doi.org/10.5574/KSOE.2011.25.1.056

The Influence of Treatment Condition During Low Temperature Plasma Carburizing of AISI304L Stainless Steel  

Lee, In-Sup (Department of Advanced Materials Engineering, Dongeui University)
Publication Information
Journal of Ocean Engineering and Technology / v.25, no.1, 2011 , pp. 56-60 More about this Journal
Abstract
A low temperature plasma carburizing process was performed to AISI 304L austenitic stainless steel to achieve the enhancement of surface hardness without a compromise in their corrosion resistance. Attempts were made to investigate the influence of the processing temperatures on the surface-hardened layer during low temperature plasma carburizng in order to obtain the optimum processing conditions. The expanded austenite (${\gamma}C$) was formed on all the treated surfaces. Precipitates of chromium carbides were detected in the hardened layer (C-enriched layer) only for the specimen treated at $500^{\circ}C$. The hardened layer thickness of ${\gamma}C$ increased up to about $35\;{\mu}m$, with increasing treatment temperature. The surface hardness reached about 1000 $HK_{0.05}$, which is about 4 times higher than that of the untreated sample (250 $HK_{0.05}$). Minor loss in corrosion resistance was observed for the specimens treated at temperatures of $310^{\circ}C-450^{\circ}C$ compared with untreated austenitic stainless steel. Particularly, the precipitation of chromium carbides at $500^{\circ}C$ led to a significant decrease in the corrosion resistance.
Keywords
Austenitic stainless steel; Low temperature plasma carburizing; Expanded austenite; Corrosion resistance;
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Times Cited By KSCI : 1  (Citation Analysis)
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