Issues »  Volume 40, Issue 8

Influence of Lubricoolants with Active Chemical Elements on Increase of Durability of Steel Parts After Frictional Hardening Working Surfaces

V. V. Tykhonovych

G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine

Received: 06.03.2018. Download: PDF

As determined, an increase in the fatigue crack resistance of machine parts at frictional hardening of their working surfaces essentially depends on the choice of the technological environment. A complex local study of the influence of different working media on the phase and chemical compositions, microstructure, and stress state of friction-hardened steel 45 is carried out. As shown, a saturation of friction-hardened metal with active chemical elements from lubricoolants influences on the fatigue crack resistance of articles. These chemical elements are predominantly located in the near-boundary regions of grains. They do not form any chemical compounds with the atoms of the parent metal and significantly change both the electronic structure and the nature of chemical bonds between the atoms. Saturation of friction-hardened metal with carbon atoms reduces the fatigue crack resistance of the material because of low atoms’ mobility in the near-boundary regions of the grains because of formation of strong covalent bonds between the carbon atoms and the surrounding metal atoms.

Key words: friction, lubricoolants, fatigue crack resistance, plastic deformation, impurity atoms, electronic structure, interatomic bonds.

URL: http://mfint.imp.kiev.ua/en/abstract/v40/i08/1005.html

DOI: https://doi.org/10.15407/mfint.40.08.1005

PACS: 06.60.Vz, 62.20.Qp, 71.20.Be, 81.40.Np, 81.40.Pq, 81.65.-b, 82.80.Pv

Citation: V. V. Tykhonovych, Influence of Lubricoolants with Active Chemical Elements on Increase of Durability of Steel Parts After Frictional Hardening Working Surfaces, Metallofiz. Noveishie Tekhnol., 40, No. 8: 1005—1027 (2018) (in Russian)

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