Structure and Properties of New Antifriction Composites Based on Tool Steel Grinding Waste

Tetiana Roik,Abhay Chaubey,Sadaqat Ali,Taslima Khanam,Gurusami Balaganesan,Ahmad Rashedi

doi:10.3390/su13168823

Tetiana Roik, Abhay Chaubey + Show 4 more

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https://doi.org/10.3390/su13168823

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Abstract

This article investigates the impact of manufacturing technology on the structure, mechanical, and tribological properties of new antifriction composite materials based on R6M5 high-speed tool steel grinding waste. The characteristics of the new composite’s structure formation and its impact on properties after use of the established technological modes, including grinding waste regeneration, were illustrated. It was demonstrated that such technology is capable of ensuring microheterogeneous structure. The material’s structure consists of the metal matrix based on R6M5 high-speed tool steel waste and uniformly distributed CaF2 solid lubricant in the steel matrix. As compared to known iron-based composites, this structure promotes a high degree of mechanical and tribological properties. During tribological tests, anti-seize thin films of 15–20 μm are formed on the contacting surfaces. These constantly renewable films contribute to the high antifriction properties of the composite under the studied friction conditions and provide a self-lubricating effect. Such films fully cover both the material’s surface and the counterface. The formation of antifriction films results in the self-lubrication mode. The findings of the study open up the possibility of predicting the friction behavior of a composite at high temperatures by selecting the initial metal grinding waste to ensure the appropriate level of properties. The extensive use of various alloy steel-based industrial grinding waste in the re-production cycle would significantly contribute to resolving the global environmental problem of protecting the environment from pollution.

Highlights

IntroductionA large number of antifriction (bearing) cast materials based on ferrous and non-ferrous metals and composite materials obtained by powder metallurgy methods have been developed [1,2,3]
The subject of study is a new antifriction composite material based on R6M5 highspeed tool steel grinding waste with CaF2 solid lubricant (Table 1) [10,11]
The research results showed the possibility of the alloyed grinding waste effective for the manufacture of new composites with high functional properties

Summary

Introduction

A large number of antifriction (bearing) cast materials based on ferrous and non-ferrous metals and composite materials obtained by powder metallurgy methods have been developed [1,2,3]. In most cases, parts working in friction units, in particular, plain bearings, fail much earlier than other parts of machines. This necessitates the completion of work on equipment repair and the production of a large number of replacement parts. A lot of cast and composite antifriction materials, such as plain bearings, have been developed and used today These are materials based on ferrous and non-ferrous metals, polymer materials, Sustainability 2021, 13, 8823.

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