The effect of oxide scale of stainless steels on friction and surface roughness in hot rolling

Wei, Dongbin; Huang, Junxia; Zhang, A W; Jiang, Zhengyi; Tieu, Anh Kiet; Xu, Shunjian; Jiao, Sihai

doi:10.1016/j.wear.2010.11.029

Cited by 30 publications

(20 citation statements)

References 16 publications

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“…Budzynski et al , using a ball‐on‐disk tribo‐tester, measured a friction coefficient between 0.2 and 0.6 for different nitrogen‐implanted AISI 316L grades. Similarly, other studies have reported values of COF ranging from 0.2 to 0.65 for different SS grades and different testing methodologies . Thus, the COF for the steel grade used in the current study, measured at 0.24 ± 0.04, is consistent with the values reported in the literature studies.…”

Section: Resultssupporting

confidence: 90%

Continuously extruded micro‐textured polypropylene films

Villacorta

Hulseman²,

Cannon³

et al. 2013

Polymer Engineering & Sci

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The continuous extrusion of micro-textured isotactic polypropylene (i-PP) film and its tribological properties are reported. As analyzed by scanning electron microscopy, a rectangular-semicircular micro-patterned die successfully produced extruded cast-films with hill-like micro-texture. Such films displayed static and kinetic coefficients of friction (COF s and COF k ) values of 0.247 6 0.028 and 0.245 6 0.003, respectively, for a steel fixture sliding along the micro-texture of the film. The equivalent COF s and COF k values for non-textured (NT) films were 0.369 6 0.036 and 0.340 6 0.024, respectively, confirming that textured films displayed a reduction in COF of about 30%. For textured and NT films sliding on textured films, the COF k values were even lower at 0.161 6 0.013 and 0.113 6 0.004, which represents about 20-40% reduction as compared with that for the NT-NT counterparts. Films coated with a silicone lubricant displayed COF s and COF k values of 0.334 6 0.042 and 0.099 6 0.012, respectively, for NT films sliding over lubricated NT films, and 0.426 6 0.031 and 0.063 6 0.006, respectively, for textured films sliding over lubricated textured films. The COF k values for textured/non-lubricated films approach those of NT/lubricated films, indicating that micro-textured polypropylene films may be used in environmentally sensitive applications where lubricants and fluorinated additives may not be used for reducing friction.

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Section: Resultssupporting

confidence: 90%

Continuously extruded micro‐textured polypropylene films

Villacorta

Hulseman²,

Cannon³

et al. 2013

Polymer Engineering & Sci

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“…The impact of the oxide layer thickness on the lubrication performance was observed in rolling tests of two stainless steel grades [19]. Similar to the previous studies, after the thickness reduction rate reached 20%, the sheets were re-oxidized at high temperature in a very short time.…”

Section: Oxide In Rolling Processsupporting

confidence: 77%

“…The evolution and influence of the roughness of the soft oxide layer of steel sheet on reduction rate is also an important research topic in rolling [19,21]. The authors relied heavily on the numerical simulation and agreed that R a (μm) tended to decrease when the reduction ratio was increased (between 5% and 35%).…”

Section: Oxide In Rolling Processmentioning

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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“…Secondly, a modified pre-mounting procedure was followed [13]. After the good mixing of the epoxy resin and the hardener, leave there for a while until the liquid more viscous, when it is going to be solidified, just at this time, spread this thick paste onto the surface of the oxide scale.…”

Section: Oxidation Testmentioning

confidence: 99%

Tribological properties of magnetite precipitate from oxide scale in hot-rolled microalloyed steel

Jiang

Wei

et al. 2013

Wear

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Nano-magnetite (Fe3O4) particles have a potential to lead to the formation of lubrication tribofilm that reduces the friction and wear in hot steel strip rolling. In this paper, an attempt to fabricate the oxide film with magnetite precipitates from thermally-grown wustite (Fe1-xO) layer during isothermal cooling of low carbon microallyed steel, was obtained. The precipitation behaviors were investgated on Gleeble 3500 thermomechanical simulator under the humid air with water vaour content of 19.5 per vol percent. Several types of magnetite precipitates were examined using scanning electron microscope (SEM) with energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD) analysis. The tribological properties of magnetite precipitates were investigated in pin-on-disc configuration. It was found that the dispersed magnetite particles originate from either the pro-eutectoid precipitation above 570 degrees celcius or the partical decomposition of wustite below 570 degrees celcius. The oxide film on the presence of free particles durin g eutectoid precipitation could be a lubricant and consequently resist wear, particularly for the oxide scale with a typical thickness in the range of 8 to 11 um in dry ai and moisture atmosphere. Furthermore, characterisation and precipitation process of the oxide scale are discussed, with respect to a probable mechanism to explain the lubricated properties has been proposed. thermo-mechanical simulator under the humid air with water vapour content of 19.5 vol.%. Several types of magnetite precipitates were examined using scanning electron microscope (SEM) with energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD) analysis. The tribological properties of magnetite precipitates were investigated in pin-on-disc configuration. It found that the disperse magnetite particles originate from either the pro-eutectoid precipitation above 570C or the partial decomposition of wustite below 570C. The oxide film on the presence of free particles during eutectoid precipitation could be a lubricant and consequently resist wear, particularly for the oxide scale with a typical thickness in the range of 8 to 11μm in dry air and moisture atmosphere. Furthermore, characterisation and precipitation process of the oxide scale are discussed, with respect to a probable mechanism to explain the lubricated properties has been proposed.

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The effect of oxide scale of stainless steels on friction and surface roughness in hot rolling

Cited by 30 publications

References 16 publications

Continuously extruded micro‐textured polypropylene films

Continuously extruded micro‐textured polypropylene films

Tribology in metal forming at elevated temperatures

Tribological properties of magnetite precipitate from oxide scale in hot-rolled microalloyed steel

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