Potential Methods for Limiting the Consumption of Machine Components Exposed to Abrasive Wear

Abstract

The analysis of the behavior in exploitation of the extraction, transportation and utilization of hard rock type mineral substances proved that one of the most extended and aggressive forms of wear is abrasive wear. The effects of abrasive wear on the machine components and their economic implications are significant, especially due to the operational pauses coming up in the technological flows that serve specific activities. This study presents two ways of limiting the consumption of tamping tools for the railway machines that are submitted to abrasive wear, namely, by reconditioning with the help of electrodes for overlaying welding with alloys of preestablished characteristics; by executing cast cleats from composite material in which metal carbides were infiltrated by diffusion. The great number of cast cleats tested in exploitation allowed a reliability and maintainability analysis to be made using the Weibull++ program, including the determination of the necessary number of cleats for 5000 h of functioning. The results of the experiments performed to this end demonstrated that both the reconditioning and execution of spare parts, with the help of reusable materials, could be solutions for sustainability in several economic fields, especially in those where the production costs are high.

Application of Rock Abrasiveness and Rock Abrasivity Test Methods—A Review

“…The results of the performed experiments demonstrate that both the reconditioning and execution of spare parts, with the help of reusable materials, could be solutions for sustainability in many economic fields, especially in those where the production costs are immense [75]. For this reason, many methods exist for assessing rock abrasiveness and rock abrasivity.…”

“…The assessment of rock abrasivity is most commonly used in tunnel construction, where the cutting shields of the TBM (tunnel boring machine) are equipped with cutting discs that excavate the rocks by static crushing. The effectiveness of the tunnelling process is influenced by rock abrasivity, which determines the rate of abrasive disc wear [75,76]. Rock abrasivity is also an essential factor affecting drilling tool wear used in many industries, such as drilling, mining and construction.…”