TY - JOUR ID - 72291 TI - Effect of Gas Mixture H2-N2 on Microstructure and Microhardness of Steel 32CDV13 Nitrided by Plasma JO - International Journal of Engineering JA - IJE LA - en SN - 1025-2495 AU - Benramache, Said AU - Chala, Abdelouahed AU - Belahssen, Okba AU - Bensahal, Djamel AD - VTRS Laboratory, Institute of Technology, University of El-Oued 39000, Algeria AD - material sciences, university of Biskra AD - material sciences, Univeristy of Biskra AD - mechanics, University of Laghouat Y1 - 2014 PY - 2014 VL - 27 IS - 4 SP - 621 EP - 624 KW - Ion nitriding KW - Steel 32CDV13 KW - Microstructure KW - microhardness DO - N2 - Nitriding treatments of low alloyed steels can be performed only at relatively low temperatures in order to avoid a decrease of corrosion resistance due to nitride layers formation. These conditions promote the formation of the compound layer and diffusion zone, which shows high hardness and good corrosion resistance. In the present paper, the influence of the gas mixture N2-H2 in plasma nitriding process on the microstructural and mechanical characteristics of 32CDV13 steel samples was evaluated. This nuance is used in manufacturing mechanical pieces that are greatly solicited in fatigue as the transmission gearings on the helicopters’ rotors and the rolling used in aeronautic. Plasma nitriding treatments were performed at temperatures in the range 773 K for 4 h. The modified surface layer of the nitrided samples consists mainly of the γ’ and ε phases, according to metallographic technique analysis, it seems to be essentially a modification of the austenite matrix. High hardness values are observed in the modified layer with a steep decrease to matrix values.  UR - https://www.ije.ir/article_72291.html L1 - https://www.ije.ir/article_72291_d0b13bdf6d6fa186c0c82e1dafc4011f.pdf ER -