<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>This article is devoted to research of the tribosynthesis mechanism of antifriction films and their influence on the functional properties of antifriction composites based on copper alloyed with nickel and molybdenum with the CaF<sub>2</sub> solid lubricant additions for operation at rotation speeds of 3,000–7,000 rph and increased loads of 3.0–5.0 MPa in air. Studies have shown that antifriction films are complex, dynamically changing formations on the surfaces of the composite and counterface, developing according to the bifurcation mechanism. The antifriction layer is decisive in the formation of the friction pair's tribological high-level properties, which provide the self-lubrication mode of the friction unit. The formation and permanent presence of the anti-seize film is associated with a balanced wear rate of the film and its constant formation again on these worn areas at rotation speeds of up to 7,000 rph and loads of up to 5.0 MPa. Due to the steady self-lubrication mechanism, the copper-based composite has significant advantages over cast bronze CuSn5ZnPb, which can only work with liquid lubrication in the friction units of printing machines. The performed studies make it possible to choose rational modes for operation of new high-speed antifriction Cu-composites based on the friction films analysis, predicting their high functional properties.</p>
</abstract>

This article is devoted to research of the tribosynthesis mechanism of antifriction films and their influence on the functional properties of antifriction composites based on copper alloyed with nickel and molybdenum with the CaF2 solid lubricant additions for operation at rotation speeds of 3,000–7,000 rph and increased loads of 3.0–5.0 MPa in air. Studies have shown that antifriction films are complex, dynamically changing formations on the surfaces of the composite and counterface, developing according to the bifurcation mechanism. The antifriction layer is decisive in the formation of the friction pair's tribological high-level properties, which provide the self-lubrication mode of the friction unit. The formation and permanent presence of the anti-seize film is associated with a balanced wear rate of the film and its constant formation again on these worn areas at rotation speeds of up to 7,000 rph and loads of up to 5.0 MPa. Due to the steady self-lubrication mechanism, the copper-based composite has significant advantages over cast bronze CuSn5ZnPb, which can only work with liquid lubrication in the friction units of printing machines. The performed studies make it possible to choose rational modes for operation of new high-speed antifriction Cu-composites based on the friction films analysis, predicting their high functional properties.

Tribosynthesis of friction films and their influence on the functional properties of copper-based antifriction composites for printing machines

Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering

Wroclaw University of Science and Technology

National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”

Department of Lightweight Elements Engineering, Foundry and Automation

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

This article is devoted to research of the tribosynthesis mechanism of antifriction films and their influence on the functional properties of antifriction...

Tribosynthesis of friction films and their influence on the functional properties of copper-based antifriction composites for printing machines

Published Online: May 02, 2023

Page range: 147 - 157

Received: Feb 09, 2023

Accepted: Mar 18, 2023

DOI: https://doi.org/10.2478/msp-2022-0051

Keywords
copper-based composite, antifriction properties, structure homogeneity, rotation speed, tribosynthesis, anti-seize films

© 2023 Kayode Olaleye et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Tribosynthesis of friction films and their influence on the functional properties of copper-based antifriction composites for printing machines

Published Online: May 02, 2023

Page range: 147 - 157

Received: Feb 09, 2023

Accepted: Mar 18, 2023

DOI: https://doi.org/10.2478/msp-2022-0051

Keywordscopper-based composite, antifriction properties, structure homogeneity, rotation speed, tribosynthesis, anti-seize films

© 2023 Kayode Olaleye et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
copper-based composite, antifriction properties, structure homogeneity, rotation speed, tribosynthesis, anti-seize films