Issues »  Volume 40, Issue 4

Effect of Liquid Salt Bath Nitrocarburizing on Mechanical Properties of Low-Alloy Sintered Steels

S. Serrai, S. Mechachti, O. Benchiheub, S. Boudebane, M. Fellah, M. Z. Touhami

Badji Mokhtar University, BO 12, CP 23000 Annaba, Algeria

Received: 28.12.2017. Download: PDF

The purpose of this study is to produce Fe–2Cu–2Ni–0.7Mo–$X$C steels by means of the powder metallurgy at different sintering temperatures. The mechanical properties of sintered steels have recently reached a level equivalent to that of steels produced by other processes. The static and dynamic mechanical properties of parts made of sintered steel depend on density and microstructure. Many process parameters such as initial composition, alloying elements, atmosphere, time, sintering temperature, and nitrocarburizing influence the microstructure of steel parts. The compacts’ preparation involves powder mixing, cold pressing at 500 MPa, and sintering at 1250°C within the H2 atmosphere for 2 hours and 25 min. The influence of sintering temperature on both hardness and microstructure of the steel is investigated. In this study, sintered Fe–2Cu–2Ni–0.7Mo–$X$C-type steels are developed. The impact of nitrocarburizing on this structure is evaluated. Microscopy, SEM, and destructive testing are used for characterization of the sintered steels.

Key words: microstructure, nitrocarburizing, alloying elements, porosity, density, microhardness.

URL: http://mfint.imp.kiev.ua/en/abstract/v40/i04/0515.html

DOI: https://doi.org/10.15407/mfint.40.04.0515

PACS: 06.60.Vz, 61.72.Ff, 62.20.Qp, 81.20.Ev, 81.40.Np, 81.40.Pq, 81.65.Lp

Citation: S. Serrai, S. Mechachti, O. Benchiheub, S. Boudebane, M. Fellah, and M. Z. Touhami, Effect of Liquid Salt Bath Nitrocarburizing on Mechanical Properties of Low-Alloy Sintered Steels, Metallofiz. Noveishie Tekhnol., 40, No. 4: 515—527 (2018)

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