Wear mechanisms experienced by a work roll grade high speed steel under different environmental conditions

Garza-Montes-de-Oca, Nelson F.; Rainforth, W. M.

doi:10.1016/j.wear.2009.01.048

Cited by 85 publications

(41 citation statements)

References 18 publications

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“…It is confirmed in most of the works (often performed on a high temperature pin on disc tribometer) that friction coefficient decreases with temperature disregarding work roll grade [23,25,26,29,30]. However, there was an exception with HSS, that its friction coefficient increased in an approximately linear manner with temperature in the rolling-sliding disc on disc configuration [31]. In this case, oxides were not the same in terms of the environment and the wet conditions led to the formation of a spinel (M 3 O 4 ), Friction 3(1): 1-27 (2015) 5 which could be considered as lubricious oxide, and iron oxide (Fe 2 O 3 ), which was absent in the dry tests.…”

Section: Oxide In Rolling Processmentioning

confidence: 85%

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Tribology in metal forming at elevated temperatures

et al. 2015

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Abstract:The tribo-characteristics of metal forming at high temperatures have not yet been well understood due to the complex nature of thermal, microstructural, interaction, and process parameters. This is a review paper on the effects of temperature, coating, and lubrication to the tribological characteristics in hot forming as well as the tribometers for different metal forming processes at elevated temperatures mainly based on the experimental work. The tribological behaviors of oxides in hot forming, such as rolling and stamping, were reviewed and presented. Some commonly used surface coatings and lubricants in hot forming were given. Many types of tribometer were selected and presented and some of them provided a great potential to characterize friction and wear at elevated temperatures. Nevertheless, more testing conditions should be further investigated by developing new tribometers. Eventually, experimental results obtained from reliable tribometers could be used in theory and model developments for different forming processes and materials at high temperatures. The review also showed the great potential in further investigations and innovation in tribology.

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Section: Oxide In Rolling Processmentioning

confidence: 85%

“…[31] tested HSS at different temperatures in different environments (dry and wet conditions) on a rolling-sliding disc on disc configuration (Fig. 2).…”

Section: Oxide In Rolling Processmentioning

confidence: 99%

Tribology in metal forming at elevated temperatures

et al. 2015

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“…and incur higher production cost, restricting the application of high speed steel rolls [5][6]. Through changing concentration of boron and carbon to control the volume fraction of borides and carbides in matrix, the high boron high-speed steel was developed that can be used as excellent wear-resistant material and the cost of production is decreased at the same time [7][8][9][10]. Investigations have discovered that borides (such as FeB, Fe 2 B) can increase hardness and wear resistance of cast iron-boron alloy [10,11].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic calculation and analysis for aluminum‐alloyed high boron high speed steel

Yang

Wang

et al. 2018

Materialwissenschaft Werkst

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The equilibrium solidified phase diagrams of high boron high speed steel have been calculated and the vertical section of iron-carbon pseudo-binary phase diagrams has been drawn with different aluminum concentration. The effect of aluminum on phase diagrams and solidification microstructure has been investigated by using optical microscope, scanning electron microscopy, X-ray diffraction, and differential scanning calorimetry. The results show that the austenite region shrinks to a small area and the d-iron changes into a-iron directly during cooling process when the aluminum content reaches 1.5 wt.%. The addition of excessive amount of aluminum favors the formation of ferrite, which leads to the hardness decreasing. Moreover, excessive amount of aluminum (Al ! 1.5 wt.%) will make network M 2 B borocarbides tend to break. Alloying with aluminum raises the solubility of carbon in the matrix and reduces the quenched hardness. The calculation results are agreed with the ones from experimental. The calculation of phase diagrams method has been successfully used for the computation of phase equilibrium in the multi-component high boron high-speed steel system. The work provides a practical method for engineers and researchers in related areas.Keywords: High boron high speed steel / phase diagram calculation / aluminum / solidification / Thermo-Calc Schlü sselwö rter: Hochborhaltige Schnellarbeitsstä hle / PhasendiagrammBerechnungen / Aluminium / Erstarrung / Thermo-Calc

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“…Particularly, in modern hot rolling mills, high speed steels are used as common material for the work rolls. The surface of the rolls in these installations experiences a variety of degradation mechanisms namely thermal fatigue [2,3], abrasive wear [4,5] and oxidation [6]. The isothermal oxidation behaviour of work rolls made of high chromium irons and high speed steels has been studied [6,7] to determine the rate of growth and the chemical composition of the oxide layer.…”

Section: Introductionmentioning

confidence: 99%

Failure Modes of the Oxide Scale Formed on a Work Roll Grade High Speed Steel

2011

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The behaviour of an oxide scale grown on the surface of a high-speed steel subjected to thermal cycling was studied. The oxide layer formed on the steel by means of the exposure of samples of this material to a mixture of dry air and water vapour at either 615 or 550°C. The samples were held for 1 h at either temperature and were cooled to room temperature by quenching with distilled water. This procedure was repeated for up to forty cycles. The oxide layer was subjected to the action of thermal stresses generated during either the cooling or heating stages. It was found that both, the composition of the oxide layer and the amount of oxide spalled from the surface depended on the number of cycles imposed to the samples. The mechanisms that promote oxide spallation and the preferential composition of the oxides that remain on the surface of the steel after spallation are analyzed and discussed.

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Wear mechanisms experienced by a work roll grade high speed steel under different environmental conditions

Cited by 85 publications

References 18 publications

Tribology in metal forming at elevated temperatures

Tribology in metal forming at elevated temperatures

Thermodynamic calculation and analysis for aluminum‐alloyed high boron high speed steel

Failure Modes of the Oxide Scale Formed on a Work Roll Grade High Speed Steel

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