Formation of expanded austenite using hybrid low temperature thermochemical heat treatment on 2205 duplex stainless steel

Adenan, M.S. and Berhan, M.N. and Haruman, Esa (2014) Formation of expanded austenite using hybrid low temperature thermochemical heat treatment on 2205 duplex stainless steel. Advanced Materials Research, Vol970. pp. 244-247. ISSN 10226680

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Abstract

Surface modification on 2205 duplex stainless steel (DSS) was performed by low temperature thermochemical hybrid (nitrocarburizing) heat treatment at temperature of 450° C and at holding time of 30 hours. During the process, carbon and nitrogen elements were simultaneously introduced onto the surface of DSS with composition of 5%CH4 + 25% NH3 + 70% N2. Microstructural observations reveal the formation of thick diffusional hybrid layer on the surface of 2205 DSS with very high hardness at cross sectional area. Both carbon and nitrogen diffusions formed expanded austenite (γN/C) and expanded ferrite (αC), however precipitation of nitride (Cr2N) which also occurred at the layer may deteriorate the corrosion resistance of 2205 DSS. Further investigation is required based on the parameters used in the process to produced precipitation free hybrid layer

Item Type:	Article
Uncontrolled Keywords:	Duplex stainless steel; Expanded austenite; Hybrid heat treatment; Low temperature
Subjects:	Technology > TJ Mechanical engineering and machinery Technology > TP Chemical technology
Divisions:	Fakultas Teknik dan Ilmu Komputer > Program Studi Teknik Industri
Depositing User:	Users 2 not found.
Date Deposited:	22 Jul 2016 08:57
Last Modified:	22 Jul 2016 08:57
URI:	https://repository.bakrie.ac.id/id/eprint/131

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