NH3 Gas Effect of Gaseous Heat Treatment on some Properties Of Spreading (Diffusion) Surface Layer of Steel 20
published by Tishreen University
in 2015
in Physics
and research's language is
العربية
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Abstract in English
We have studied in this paper the effect of thermal gaseous using NH3 – gas at some
diffusion layers properties of tool steel 20 in temperature range (550 ,650 ,750, 850) 0C ,
4h at each one . The purpose of this heat treatment is to get and determine the microhardness,
fatigue and corrosion resistance.
The micro-hardness was determined using Vickers's tester with values ranged
between ( 130-435 ) HV.
In order to verify these results, we studied the microstructure if the surface layers
using metallurgical microscope and SEM (Scanning Electron Microscope). Furthermore
the corrosion resistance was studied after immersing it in sea water for two year.
References used
Danial H. Herring ., Principles of Gas Nitriding , part 2 ., by: Danial H. Herring ,- Industrial Heating , vol.78 , 2011., Issus 5 , 53
Goodarzi M.; Marashi S.P.H.; Pouranvari M., Dependence of Overload Performance on Weld Attributes For Resistance Spot Welded Galvanized Low Carbon Steel, Journal of Materials Processing Technology , Moscow. T 209.- № 9. 2009 , 4379- 4384.
Buravlev Yu.M.; Kushnir M.P.; Miloslavski A.G., The Peculiarities of Formation The Upper Layers of Steels After Their Gas Chemical And Physical Treatment, Bulletin of Donetsk National University, Series A. Natural Sciences,- Donetsk,- № 1, 2010 , 107-111