Experimental Investigation on Hardness of Gas Implanted AISI 316LN Austenitic Stainless Steel
Ram. Subbiah1, P. Karthick2, R. Manjunath3, T. Prasanth4, R. Ilavarasan5, R. Rajavel6
1Ram.Subbiah, Assistant Professor, Mechanical Engineering, TJS Engineering College, Chennai.
2P.Karthick, Final Year Mechanical Engineering, TJS Engineering College, Chennai.
3R.Manjunath, Final Year Mechanical Engineering, TJS Engineering College, Chennai.
4T.Prasanth, Final Year Mechanical Engineering, TJS Engineering College, Chennai.
5R.Ilavarasan, Final Year Mechanical Engineering, TJS Engineering College, Chennai.
6Dr.R.Rajavel, Professor & Head, Mechanical Engineering, Velammal Engineering College, Chennai.
Manuscript received on January 29, 2014. | Revised Manuscript Received on February 19, 2014. | Manuscript published on February 20, 2014. | PP: 7-9 | Volume-2, Issue-3, February 2014. | Retrieval Number: C0407022314/2014©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering & Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The superiority of austenitic stainless steels lies in its good weldability and great resistance to stress corrosion and pitting, because of its higher chromium, molybdenum and nitrogen contents, when compared to general stainless steels. However, some of its applications are limited by very poor wear behavior, Gas nitriding is a very effective treatment for producing wear resistant and hard surface layers on the stainless steels without compromising the corrosion resistance. In this work, AISI 316LN stainless steels samples were gas nitrided at three different timing parameters 8 hrs, 40 hrs and 72hrs under a pressure of 500Pa, in order to verify the influence of temperature on the morphology, wear of the modified surface layers. The gas nitrided samples were analyzed by means of various metallographic tests like Optical microscope, X-Ray diffraction. Wear tests were conducted on a pin on disc machine. For the samples which was nitrided, chromium nitrides were formed on the surface of the layers.
Keywords: wear behavior, wear resistance, gas nitriding, metallography.