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Influence of copper content on wear behavior of composites “steel ShKh15/copper” at sliding against copper under electric current of contact density higher than 100 A/cm2
https://doi.org/10.22349/1994-6716-2018-94-2-88-95
Abstract
Powder composites “steel ShKh15/copper” in alumina ceramics and graphite powders surrounding were sintered in the air. Powder steel was restored from grinding slime of bearings production. It is shown that the steel framework has low level of mechanical properties, but high pore space percolation. Copper concentration increases isolated pores concentration impeding oil impregnation. This effect did not allow making the long and steady sliding electric contact with contact current density higher than 150 A/cm2. The sintered composites based on recycled bearing steel and containing near 15%Cu show high wear resistance at sliding with a contact current density 150–200 A/cm2 under boundary lubrication.
Keywords
sliding electric contact,
surface layer,
specific surface contact,
electric conductivity,
sintered composite,
pores space
Supporting agencies: This research was financially supported by a grant from the Russian Foundation for Basic Research (RFBR) under the project No 16-48-700434.
About the Authors
M. I. Aleutdinova
Institute of Physics of Strength and Materials Science, Siberian Branch of RAS;
Seversk Technological Institute of Moscow Engineering Physics Institute
Russian Federation
Russian Federation
Cand Sc. (Eng)
2/4, Prospect Akademichesky, 634055 Tomsk;
65, Prospect Kommunistichesky, Seversk, 636036 Tomsk Region
V. V. Fadin
Institute of Physics of Strength and Materials Science, Siberian Branch of RAS
Russian Federation
Russian Federation
Cand Sc. (Eng)
2/4, Prospect Akademichesky, 634055 Tomsk
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Review
For citations:
Aleutdinova M.I., Fadin V.V. Influence of copper content on wear behavior of composites “steel ShKh15/copper” at sliding against copper under electric current of contact density higher than 100 A/cm2. Voprosy Materialovedeniya. 2018;(2(94)):88-95. (In Russ.) https://doi.org/10.22349/1994-6716-2018-94-2-88-95
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