Tribological performance of some solid lubricants for hot forming through laboratory simulative tests

Tomala, A.; Hernández, Sinuhé; Ripoll, Manel Rodríguez; Badisch, E.; Prakash, Braham

doi:10.1016/j.triboint.2014.02.008

Cited by 37 publications

(24 citation statements)

References 11 publications

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“…Common problem in most technology systems found to be wear damage which subjected to elevated temperature during operation [1]. Surface topography defined three characteristics of surface finishing which include surface roughness, lay and waviness [2].…”

Section: Introductionmentioning

confidence: 99%

“…Surface topography defined three characteristics of surface finishing which include surface roughness, lay and waviness [2]. Surface modification importance to most industrial applications which are surface dependent such as adhesion, friction, corrosion resistance and wettability [1], [3], [4]. Surface roughness plays an important role in controlling friction and wear between two contact areas during processing [3], [5], [6].…”

Section: Introductionmentioning

confidence: 99%

“…Surface roughness plays an important role in controlling friction and wear between two contact areas during processing [3], [5], [6]. Excessive friction between contact surfaces after thousands cycles during processing produces abundant heat resulted in reduced die lifecycle [1], [7].…”

Section: Introductionmentioning

confidence: 99%

“…In some cases, surface roughness is crucial to enhance adhesion between coating materials and substrate, holding lubricant in machining process and ease component removal from die surface in forming process [1], [5], [8], [9]. Surface texture affects friction by creating resistance that prevented fluid from escaping from surface contact [3], [5]- [7].…”

Section: Introductionmentioning

confidence: 99%

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Micro-Bulges Investigation on Laser Modified Tool Steel Surface

et al. 2017

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Abstract. This paper presents micro-bulges investigation on laser modified tool steel. The aim of this study is to understand the effect of laser irradiance and interaction time on surface morphology configuration. An Nd:YAG laser system with TEM00 pulse processing mode was used to modify the samples. Metallographic study shows samples were analyzed for focal position effect on melted pool size, angle of peaks geometry and laser modified layer depth. Surface morphology were analyzed for surface roughness. Laser modified layer shows depth ranged between 42.22 and 420.12 μm. Angle of peak bulge was found to be increase with increasing peak power. The maximum roughness, Ra, achieved in modified H13 was 21.10 μm. These findings are significant to enhance surface properties of laser modified steel and cast iron for dies and high wear resistance applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Micro-Bulges Investigation on Laser Modified Tool Steel Surface

et al. 2017

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“…Ghiotti et al carried out thermal and physical-simulation experiments to examine the performance of the zinc-based coating [9]. Tomala et al tested different solid lubricants in the sliding experiments at elevated temperatures [10].…”

Section: Introductionmentioning

confidence: 99%

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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Micro morphological observation and mechanism analysis of boundary layer evolution in mixed powder lubrication

Wang

Liu

et al. 2017

Lubrication Science

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In mixed‐powder‐lubricated interfaces, the lubrication performance is strongly affected by evolution of the boundary layer features. Therefore, the current investigation uses a laser microscopy system to observe the behaviours of boundary layer formed on the brass specimens during the process of graphite‐lubricated 0.45 C steel (HRC56) sliding upon brass alloy (HV160). The evolution process of mixed powder lubrication can be divided into 4 typical stages: running‐in, stable, deterioration, and damage. Multiple micro phenomena are observed in the boundary layers at different stages. These include extent of layer coverage, flaking, local adhesion, lamellar shedding, blisters, pits, and abrasion damage. These phenomena indicate that the boundary layer deteriorates from full coverage to a damaged powdery film, and eventually the serious wear on metal substrate. Moreover, an interface model of mixed powder lubrication is established to explain the changes in boundary layers. The model displays that the typically micro events above are related to the quantitative degree of overlapping of the asperities between opposing surfaces. At first, many particles bear the load collectively and adapt to velocity differences through inner shearing in powder layer. Later, plastic deformation and abrasion between asperities play a major role in surface velocity accommodation, and the metal substrates bear the load more directly.

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Tribological performance of some solid lubricants for hot forming through laboratory simulative tests

Cited by 37 publications

References 11 publications

Micro-Bulges Investigation on Laser Modified Tool Steel Surface

Micro-Bulges Investigation on Laser Modified Tool Steel Surface

Tribology in metal forming at elevated temperatures

Micro morphological observation and mechanism analysis of boundary layer evolution in mixed powder lubrication

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