STRUCTURE AND TRIBOTECHNICAL PROPERTIES OF COMPOSITE ANTIFRICTION MATERIALS BASED ON R7M2F6 STEEL WASTE

Authors

DOI:

https://doi.org/10.20535/kpi-sn.2020.1.189200

Keywords:

Antifriction composite material, Grinding waste, High-speed steel, Solid lubricant, Technology, Structure, Functional properties, Friction films

Abstract

Background. Development of the technological measures for creating new antifriction composite materials based on waste powders of steel P7M2F6 with solid lubricant CaF2, intended for operation at temperatures up to 600 °C, sliding speeds up to 1 m/s, loads up to 5.0 MPa in air.

Objective. The purpose of the paper is to determine the features of structure formation and their influence on the properties of composite antifriction materials based on industrial grinding waste of steel P7M2F6 with solid lubricant CaF2 for operation at high temperature friction units in air.

Methods. Methodology consisted of the development of the regeneration technological modes of the industrial grinding waste of steel P7M2F6, determination of technological manufacturing operations for new antifriction composites that include mixing of steel powders with solid lubricant, pressing and sintering of composites. The study of the structure formation processes and properties of materials was carried out using optical and electron microscopy methods, standard methods for determining mechanical properties and tests for friction and wear.

Results. The influence of the developed manufacturing technology on the formation of the structure, physical mechanical and tribotechnical properties of materials based on steel P7M2F6 grinding waste with solid lubricant CaF2 additives was determined and grounded; resulting is the formation of complex heterogeneous antifriction material with high functional characteristics. The new material’s structure formation and its influence on the functional properties after using the developed manufacture modes was shown. Micro-X-ray spectral analysis confirmed the fact that CaF2, the contact pair’s chemical elements and oxygen form an antifriction film that provides a self-lubrication mode at the determined friction temperatures.

Conclusions. The possibility of predicting the structure and functional properties of antifriction self-lubricating composite materials at high temperatures by purposeful choice of starting metal grinding wastes for certain operation conditions of contact pair was shown.

Author Biographies

Tetiana A. Roik, Igor Sikorsky Kyiv Polytechnic Institute

Тетяна Анатоліївна Роїк

Iuliia Yu. Vitsiuk, Igor Sikorsky Kyiv Polytechnic Institute

Юлія Юріївна Віцюк

Olga I. Khmiliarchuk, Igor Sikorsky Kyiv Polytechnic Institute

Ольга Іларіонівна Хмілярчук

References

R.S. Ramachandra, Resource Recovery and Recycling from Metallurgical Wastes. Elsevier, 2011.

Zh. Wenshen et al., “A literature review of titanium metallurgical processes”, Hydrometallurgy, vol. 108, no. 3-4, pp. 177–188, 2011. doi: 10.1016/ j.hydromet.2011.04.005

P. Shpak et al., “Influence of electron-beam remelting on the structure and properties of high-speed steel R6M5”, Problemy Special’noj Metallurgii, no. 3, pp. 14–17, 2002.

T. Roik et al., “Features of structure formation and properties of composite antifriction materials for printing machines based on utilized waste”, Naukovi Visti NTUU KPI, no. 5, pp. 50–57, 2018. doi: 10.20535/1810-0546.2018.5.146165

T. Roik et al., “Features of the tribotechnical properties formation of composite materials based on grinding wastes of structural steel”, Powder Metallurgy, no. 7/8, pp. 88–97, 2019.

P. Kyrychok et al., Newest Composite Materials for Friction Parts of Printing Machines. Kyiv, Ukraine: NTUU KPI, 2015.

Yu.A. Heller, Tool Steels. Moscow, SU: Metallurhyia, 1983.

A. Kostornov, Tribotechnical Material Science. Lugansk, Ukraine: Noulyge, 2012.

D. Jianxin and C. Tongkum “Self-lubricant mechanisms via the in situ formed tribofilm of sintered ceramics with CaF2 additions when sliding against hardened steel”, Int. J. Refract. Metals Hard Mater., vol. 25, no. 2, pp. 189–197, 2007. doi: 10.1016/j.ijrmhm.2006.04.010

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Published

2020-03-05

Issue

No. 1 (2020)

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Статті

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