Study on the oxidation of stainless steels 304 and 304L in humid air and the friction during hot rolling

Wei, Dong Bin; Huang, Junxia; Zhang, A.W.; Jiang, Zhengyi; Tieu, Anh Kiet; Xu, Shunjian; Jiao, Sihai; Qu, Xianyong

doi:10.1016/j.wear.2008.11.030

Cited by 41 publications

(30 citation statements)

References 7 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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“…In the case of the moist atmosphere, the controllable moisture was obtained by passing industrial air through a distilled water tank which was maintained at a constant temperature. More generally, the water vapour contents between 7.0 and 19.5 vol.% in humid air are relevant to hot rolling of plain carbon steel [11,12]. During laminar cooling after hot rolling process, the steel strip through the last stands is subject to a majority of cycling water for cooling down to coiling temperature.…”

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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“…Though Krzyzanowski et al [28] claimed that holding time may result in small compositional changes and compositional changes have a large influence on oxide scale behavior, but few people have researched the effect of oxidation kinetics on IHTC and oxide scales easily split away from billet after taking out of the furnace, which further increases the difficulty of the study. For that reason, Wei's method [29] was adopted in this paper to obtain the cross-section of the oxide scale. Figure 8 shows a relationship between oxide scale formation thickness and holding time when billet is heated at a temperature of 1020 °C.…”

Section: Effect Of Holding Time On Ihtcmentioning

confidence: 99%