Low temperature thermochemical surface treatment of austenitic stainless steel for improved mechanical and tribological

Triwiyanto , Askar and Mridha , Shahjahan and Haruman, Esa (2010) Low temperature thermochemical surface treatment of austenitic stainless steel for improved mechanical and tribological. Advanced Materials Research, 83-86. pp. 489-496. ISSN 1022-6680

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Abstract

This paper describes the results of four thermochemical surface treatments of austenitic stainless steels carried out at 450oC in a fluidised bed furnace and they are nitriding, carburizing and the newly developed hybrid process involving the simultaneous and sequential incorporation of nitrogen and carbon to form a dual layer structure in order to achieve much enhanced surface hardness and wear resistance without compromising the corrosion resistance of the steel. In all these treatments there formed alloyed layers with a common feature of being precipitation-free and supersaturated with nitrogen, or carbon or both in the austenite lattice which is known as S Phase or expanded austenite. However the layer thickness was not uniform in any of these treatments and an effective layer was produced after 8h treatment duration. The nitriding treatment produced thicker and harder layer compared to other treatments; the maximum hardness was over 1500 Hv for nitriding and the minimum hardness of 500 Hv for carburizing treatment. The nitriding treatment sample gave high wear resistance which corresponded to high hardness values.

Item Type:	Article (Journal)
Additional Information:	3925/5060
Uncontrolled Keywords:	Fluidized bed furnace, Austenitic stainless steel, Thermochemical treatments, Expanded austenite, Wear resistance
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ1040 Machinery exclusive of prime movers T Technology > TN Mining engineering. Metallurgy > TN600 Metallurgy
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Prof. Dr. Shahjahan Mridha
Date Deposited:	23 Nov 2011 11:35
Last Modified:	10 Dec 2011 14:55
URI:	http://irep.iium.edu.my/id/eprint/5060

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