Overview of Materials Testing of Brown-Coal Mining Machines (Years 1985–2017)

Konat, Łukasz; Pękalski, G.

doi:10.1007/978-3-030-25478-0_2

Cited by 8 publications

(6 citation statements)

References 8 publications

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“…However, according to [ 8 ], steel with a nominal hardness of 650 HB showed the highest impact wear resistance, and it can thus be assumed that these properties remain satisfactory. The above conclusions were also confirmed in [ 9 ], where Hardox 500 steel plates applied to a bucket wheel chute showed no pronounced wear when compared to 18G2A steel (P355N) hardfaced with an Fe-Cr-C alloy. Moreover, this statement goes against the results of the tribological analysis performed using a T-07 device, which enables wear resistance in the presence of a loose abrasive to be tested.…”

Section: Introductionsupporting

confidence: 66%

“…Their coefficient of relative abrasion resistance k bAV with respect to C45 steel in the as-normalized condition is at the level of 1.25–1.29, and therefore the resistance of these steels can be considered to be very similar to each other. In comparison, according to [ 9 ], the values obtained are higher than the resistance of Brinar 500 and Hardox 500 (k bAV equal to 1.11 and 1.20, respectively). Moreover, the study did not show a linear relationship between the hardness of the material and the abrasive wear resistance, and such a relationship could not be shown for the grain size of the former austenite either.…”

Section: Resultsmentioning

confidence: 95%

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Comparative Analysis of the Influence of Chemical Composition and Microstructure on the Abrasive Wear of High-Strength Steels

2022

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The paper discusses the microstructural, chemical and tribological properties of the selected low-alloy, high-strength martensitic boron steels with a hardness of 500–600 HBW. These materials, due to their increased strength, and thus resistance to abrasive wear, are widely used in the mining, agricultural or building industries. Grades such as XAR, TBL and Creusabro were subjected to a comparative analysis. As a result of the conducted research, an attempt was made to determine the relation between the microstructural properties, chemical composition, hardness and abrasive wear resistance of the above-mentioned metallic materials belonging to the same material group. The scope of work involved a metallographic analysis, including the examination of the microstructure with an analysis of the prior austenite grain size. Tribological tests were carried out with the use of a T-07 tester, which is designed for testing abrasive wear resistance in the presence of a loose abrasive. As a result, it was found that the coefficient of relative abrasion resistance kbAV in relation to as-normalized C45 steel is equal to 0.9–1.25 and may even have the same value among materials of different hardness in the as-delivered state.

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Section: Introductionsupporting

confidence: 66%

Section: Resultsmentioning

confidence: 95%

Comparative Analysis of the Influence of Chemical Composition and Microstructure on the Abrasive Wear of High-Strength Steels

2022

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“…In this group of samples, one part of the material was tested in the post-operative state and the other after heat treatment (normalization) to simulate the initial state. The relevance of such analysis has been widely confirmed by the authors' works concerning destructive mechanical tests [3][4][5]7,9], following the assumption of degradation theory [3,11,12]. For corrosion and fracture toughness tests, samples from the hall of the Wrocław Main Railway Station were used, resembling the materials published in the work (taken from other beams) [4].…”

Section: Methodsmentioning

confidence: 99%

Minimal Invasive Diagnostic Capabilities and Effectiveness of CFRP-Patches Repairs in Long-Term Operated Metals

Lesiuk

Pedrosa

Zięty

et al. 2020

Metals

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The paper deals with the subject of diagnostics and the quick repairs of long-term operated metallic materials. Special attention was paid to historical materials, where the structure (e.g., puddle iron) is different from modern structural steels. In such materials, the processes of microstructural degradation occur as a result of several decades of exposure, which could overpass 100 years. In some cases, their intensity can be potentially catastrophic. For this reason, the search for minimally invasive diagnostic methods is ongoing. In this paper, corrosion and fracture toughness tests were conducted, and the results of these studies were presented for two material states: post-operated and normalized (as a state “restoring” virgin state). Moreover, through the use of modern numerical methods, composite crack-resistant patches have been designed to reduce the stress intensity factors under cyclic loads. As a result, fatigue lifetime was extended (propagation phase) by more than 300%.

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“…Low-alloy martensitic steels are the preferred materials for machining parts exposed to abrasive wear [ 1 , 2 ], utilizing their declared workability and weldability together with satisfactory hardness [ 3 , 4 , 5 , 6 ]. Supported by Archard’s equation relating wear resistance with hardness, this view has become very popular in the community [ 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Use of the Ball-Cratering Method to Assess the Wear Resistance of a Welded Joint of XAR400 Steel

et al. 2023

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Wear-resistant steels are designed to allow for operation under extreme loading conditions. They combine large strength with resilience and resistance to abrasive wear. In stock, the steel is subjected to preliminary heat treatment. However, any further processing at temperatures higher than 200 °C results in tempering that influences the mechanical properties of the material. The presented paper aims to study changes in abrasive wear properties across the welded joint made out of this steel, and its prime novelty lies in using the ball-cratering method to test the wear resistance of the joints. To distinguish between different crystalline structures in the weld, metallographic and XRD analyses were performed that resulted in the determination of five primary zones for which wear tests were carried out. Abrasive wear rates, studied across the welded joint, indicate that the material in the HAZ has the lowest resistance to abrasive wear. Similarly, the obtained values of the wear index show decreasing resistance of the material approaching the joint axis.

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Overview of Materials Testing of Brown-Coal Mining Machines (Years 1985–2017)

Cited by 8 publications

References 8 publications

Comparative Analysis of the Influence of Chemical Composition and Microstructure on the Abrasive Wear of High-Strength Steels

Comparative Analysis of the Influence of Chemical Composition and Microstructure on the Abrasive Wear of High-Strength Steels

Minimal Invasive Diagnostic Capabilities and Effectiveness of CFRP-Patches Repairs in Long-Term Operated Metals

Use of the Ball-Cratering Method to Assess the Wear Resistance of a Welded Joint of XAR400 Steel

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