The Phase Composition and Structure of the Antifriction Copper-Based Composite and their Influence on Tribological Properties

Роїк, Тетяна Анатоліївна; Гавриш, Олег Анатолійович; Вицюк, Ю. Ю.

doi:10.1007/s11106-021-00227-z

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…A solid lubricant was added to the original powder charge. Calcium fluoride was chosen as a solid lubricant due to its stable performance under severe operating conditions (Table 1), such as high temperatures, loads, or rotational speeds [6][7][8]19].…”

Section: Preparatory Proceduresmentioning

confidence: 99%

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New Antifriction Composites for Printing Machines Based on Tool Steel Grinding Waste

et al. 2022

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In this article, we present research results on the structure and properties of new self-lubricating antifriction composites based on 4H4VMFS tool steel grinding waste with solid lubricant additives. The new composites are designed to work in the friction units of offset cylinders in printing machines at rotation speeds up to 7000 rpm and increased loads up to 5.0 MPa. The developed technology formed composites with a fine-grained heterophase structure with a metal matrix base of tool steel 4H4VMFS regenerated grinding waste, consisting of high-alloy α−solid solution and hard grains of alloying element carbides, as well as evenly distributed CaF2 antiseizure solid lubricant. This structure ensured the formation of composites with favorable functional properties. During the friction process, antiseizure films were formed on the contact surfaces, resulting in a self-lubrication mode. Comparative tests for friction and wear showed significant advantages of the new waste composite compared to cast bronze parts, which are traditionally used in the friction units of offset cylinders of rolled newspaper printing machines. The stable operation of the new composite made it possible to ensure a “wear-free” effect. Studies have shown the importance and prospects of using the wide range of valuable grinding waste in the reproduction cycle to manufacture quality composites. Reuse of such waste would significantly protect the environment from pollution connected with human activity industrial and mitigate negative impacts on ecosystems and the biosphere.

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Section: Preparatory Proceduresmentioning

confidence: 99%

“…Bearings based on cast bronze Cu83Sn7Zn3Pb7 or Cu85Sn5Zn5Pb5 (C93200 ASTM Standard, USA) are currently used in the offset cylinders units of rolled newspaper machines such as, the Solna D390 and Solna D480 (Sweden). Such bronze bearings can work when greased with liquid oil [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

New Antifriction Composites for Printing Machines Based on Tool Steel Grinding Waste

et al. 2022

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“…The CaF 2 solid lubricant was selected for the initial charge preparation as a known effective solid lubricant in severe working conditions [19,20,27,28]. Samples were prepared by powder metallurgy methods (Figure 1) according to the technology developed by the authors of this article, which is described in the papers [10,11,[14][15][16][17][18]. The porosity of the samples was 12%-14% after cold pressing.…”

Section: Experimental Procedures 21 Preparation Of Powder Charge Comp...mentioning

confidence: 99%

“…In [14][15][16][17][18], the authors developed several copper-based antifriction composites for various operating conditions and worked out the technological operations of their production. The developed technological modes made it possible to obtain composites with a high level of functional properties depending on the features of the formed structure.…”

Section: Introductionmentioning

confidence: 99%

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

Olaleye

Роїк

Kurzawa

et al. 2022

Materials Science-Poland

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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.

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Wear-Resistant Composites Produced from Tool Steel Waste for Contact Joints of High-Speed Printing Machines

Roik,

Gavrysh,

Vitsiuk

et al. 2023

Powder Metall Met Ceram

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The Phase Composition and Structure of the Antifriction Copper-Based Composite and their Influence on Tribological Properties

Cited by 3 publications

References 6 publications

New Antifriction Composites for Printing Machines Based on Tool Steel Grinding Waste

New Antifriction Composites for Printing Machines Based on Tool Steel Grinding Waste

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

Wear-Resistant Composites Produced from Tool Steel Waste for Contact Joints of High-Speed Printing Machines

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