Yulia Usherenko, Sergei Usherenko, Vladimir Dashkevich, Javad Yazdani

##manager.scheduler.building##: Atbrivosanas aleja 115, k-4 (Faculty of Engineering) Room 308
Last modified: 01.06.2017


The article considers the possibility of pre-activation of the steel surface before nitriding. A complex dynamic method of material activation with a high-speed flow of powder particles (super deep penetration) was used. To exclude the influence of alloying elements, low-carbon steel (2% wt. C) was chosen as the initial material. Powders of NaF (> 250 μm) and Pb (<200 μm) were used as material of powder flow. Research of samples structure revealed the penetration of Pb particles through the depth of samples with the formation of channel elements and the absence of NaF powder traces. Microhardness measurements have shown that using of NaF powder leads to activation of the nitriding process and to increase of hardness of the resulting nitrided layer, while using of  Pb powder leads to inhibition of diffusion activity and decrease in the hardness of the nitrided layer. Application of too coarse fraction of NaF resulted in particles sticking to the surface of the sample that reduced the thickness of the nitrided layer. The necessity of using a finer-dispersed fraction of NaF in the future is shown.


super-deep penetration; SDP; nitriding; intensification; powders; dynamic loading


[1] V. A. Kozechko “Nitriding process intensification steel structures”, Journal of Engineering Sciences, Vol. 1, Issue 3, pp. F1-F5, 2014

[2] E.V. Berlin, N.N. Koval and L.A. Seidman, Plasma chemical-thermal treatment of the surface of steel parts. Moscow: Technosphera, 2012.

[3] Andreev AA, Kunchenko V.V., Sablev L.P., Stupak R.I., Shulaev V.M, “Steel nitriding in the plasma of modified vacuum-arc discharge”, Technology of Mechanical Engineering, vol.5 , pp. 27-30, 2002.

[4] N.K.Krioni, , A.A. Mingazheva and F.F. Musin, “Formation of a nitrided layer during high-energy surface activation of components” Electronic scientific journal "Oil and gas business", vol.5. pp..294-312, 2014.

[5] 5.     J. Owsik, K .Jach, S. Usherenko, Y. Usherenko,  O. Figovsky and V. Sobolev, , “The physics of superdeep penetration phenomenon”, Journal of Technical Physics, vol.49, Issue 1, pp.3-25, 2008.

[6] Yulia Usherenko, Sergei Usherenko and Javad Yazdani, “High-Energy Method of Transformation of Casting Metals and Alloys to the Composite Materials”, Key Engineering Materials, Vol.72 , pp.290-294, 2016.

[7] Yulia Usherenko, Sergei Usherenko and Javad Yazdani, “Composite Materials for Steel Cutting and Concrete Crushing”, Procedia Engineering, vol. 172, pp. 1198 – 1203, 2017.

[8] V.V. Sobolev and S.M. Usherenko, “Shock-wave initiation of nuclear transmutation of chemical elements”, J.Phys, IY, vol.134, pp. 977-982, 2006.

[9] Chengzhi Qi and Jianjie Chen, “Physical mechanism of super-deep penetration of solid microparticles into solid targets”, Journal of the Mechanical Behavior of Materials, vol. 23:1–2 pp.21-27, 2014.

[10] I. Krestelev, “Simulation of the Process of Entrainment of Powder Particles by Explosive Shock Waves”, Vestn. Samar. Gos. Tekhn. Univ. Ser. Fiz.-Mat. Nauki,              Issue 2(35),             pp. 125 –129, 2014.

[11] A.I. Belous, V.A. Soloduha and S.V. Shvedov, Space electronics, vol.2, Moscow: Technosphera, 2015.

[12] V.G. Sitalo “Materials applied. Launch vehicle and spacecraft manufacturing process. New composite materials. Nondestructive quality control” in  EC/ESA/NSAU Workshop on space-related research under FP-6, 2004, pp. 29-30.