Investigation of different inorganic chemical compounds as hot metal forming lubricant by pin-on-disc and hot rolling

Cui, Shaogang; Zhu, Hong Tao; Wan, Shanhong; Tran, Bach H.; Wang, Long; Tieu, Anh Kiet

doi:10.1016/j.triboint.2018.04.010

Cited by 30 publications

(34 citation statements)

References 32 publications

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“…The complex tribofilm structure was a result of thermal diffusion and tribochemical reactions between composite polyphosphate and iron oxides. Chemical analysis (XPS) revealed a significant reduction in polyphosphate chain length induced on the lubricated surface while a wear reduction mechanism via chemical digestion was also observed [18,20]. Using energetic synchrotron radiation, the fine chemical structure of the K/Na polyphosphate tribofilm was studied in detail, showing a long chainshort chain hierarchy as a function of tribofilm depth.…”

Section: Sodium Polyphosphatementioning

confidence: 99%

Section: Sodium Polyphosphatementioning

confidence: 99%

“…Using energetic synchrotron radiation, the fine chemical structure of the K/Na polyphosphate tribofilm was studied in detail, showing a long chain-short chain hierarchy as a function of tribofilm depth. As a result of this tribochemical reaction, iron oxide was disintegrated and digested into the polyphosphate network to form ferric orthophosphate (FePO 4 ), as well as iron and sodium mixed phosphates, such as (NaFePO 4 ) [20] and Na 3 Fe 2 (PO 4 ) 3 [19]. The digestion of iron oxide is accountable for the excellent wear resistance of polyphosphate tribofilm.…”

Section: Sodium Polyphosphatementioning

confidence: 99%

“…An abundance of Na 2 O was produced as a consequence of the tribochemical reaction between sodium polyphosphate and different iron oxides [19]. Having an abundance of Na without the ability to polymerize, sodium orthophosphate demonstrated the best tribological performance among the three, while the depolymerization of meta-and pyrophosphate was triggered by both thermal and tribological reactions [20]. In addition, higher loading was proven to accelerate the diffusion of Fe into polyphosphate networks [20], while an increase in temperature resulted in a reduction of long-chain polyphosphates on the rubbing surface [18].…”

Section: Sodium Polyphosphatementioning

confidence: 99%

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Tribochemistry and Lubrication of Alkaline Glass Lubricants in Hot Steel Manufacturing

Tran

2020

Lubricants

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Nowadays, the increasing demand to reduce energy consumption and improve process reliability requires an alternative lubricant with an effective tribological performance and environmentally friendly properties to replace traditional lubricants in hot steel manufacturing. The current work reviews recent comprehensive experimental and theoretical investigations in a new generation of alkaline-based glass lubricants, with phosphate, borate, and silicate being intensively researched. This class of lubricants showed an outstanding friction reduction, anti-wear, and anti-oxidation performance on coupled steel pairs over a wide range of temperatures (from 650 °C to 1000 °C). Each type had different tribochemical reactions within itself and with oxidized steel surfaces, which were largely determined by their chemical nature. In addition, the critical role of each structural component was also determined and corroborated by computational simulation. The theoretical studies at quantum and atomic levels reinforced our experimental findings by providing insights into the reaction mechanism using the static and dynamic simulations of the adsorption of lubricant molecules onto iron oxide surfaces. Additionally, the new reactive molecular dynamics (MD) model developed for alkali phosphate will need to be extended further to consider the realistic operating conditions of these lubricants at the atomic scale.

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Section: Sodium Polyphosphatementioning

confidence: 99%

Section: Sodium Polyphosphatementioning

confidence: 99%

Section: Sodium Polyphosphatementioning

confidence: 99%

Section: Sodium Polyphosphatementioning

confidence: 99%

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Tribochemistry and Lubrication of Alkaline Glass Lubricants in Hot Steel Manufacturing

Tran

2020

Lubricants

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“…Cui et al [541] have explored the possibility of using some inorganic compounds such as sodium phosphate, borate as well as layered talc powder and oil-in-water emulsion as a lubricant for hot metal forming process. Experimental studies regarding the performance of these lubricants were carried out by using high temperature pin on disc tests at 900 °C [542] investigated the high temperature lubricating effectiveness of sodium borate by using a pin (GCr15) on disc (mild steel) contact configuration and reported its excellent tribological performance in the temperature range 600−800 °C (i.e., above the melting point of sodium borate).…”

Section: High Temperature Speciality Lubricantsmentioning

confidence: 99%

A review of recent advances in tribology

et al. 2020

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The reach of tribology has expanded in diverse fields and tribology related research activities have seen immense growth during the last decade. This review takes stock of the recent advances in research pertaining to different aspects of tribology within the last 2 to 3 years. Different aspects of tribology that have been reviewed including lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology. This review attempts to highlight recent research and also presents future outlook pertaining to these aspects. It may however be noted that there are limitations of this review. One of the most important of these is that tribology being a highly multidisciplinary field, the research results are widely spread across various disciplines and there can be omissions because of this. Secondly, the topics dealt with in the field of tribology include only some of the salient topics (such as lubrication, wear, surface engineering, biotribology, high temperature tribology, and computational tribology) but there are many more aspects of tribology that have not been covered in this review. Despite these limitations it is hoped that such a review will bring the most recent salient research in focus and will be beneficial for the growing community of tribology researchers.

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