Research on oxidation wear mechanism of the cast steels

Cui, Xianghong; Wang, S.Q.; Wang, F.; Chen, K.M.

doi:10.1016/j.wear.2007.11.015

Cited by 87 publications

(39 citation statements)

References 21 publications

(35 reference statements)

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“…8b. This phenomenon is very similar to that already observed by Cui et al [35] and by Barrau et al [36]. Thus, the surface layer was not as protective as it was, for example, in the case of heat-treated steels, characterised by a harder microstructure able to conveniently sustain the surface scales [37].…”

Section: Examination Of Wears Debris and Worn Surfacessupporting

confidence: 87%

Mild Sliding Wear of Fe–0.2%C, Ti–6%Al–4%V and Al-7072: A Comparative Study

Straffelini

Molinari

2010

Tribol Lett

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The mild sliding wear of Fe-0.2%C, Ti-6%Al-4%V and Al-7072 was investigated by means of pin-ondisc sliding tests. The applied pressure was 1 MPa and the sliding velocity was varied between 0.2 and 1 m/s. The sliding behaviour was followed by continuous measurements of the friction coefficient, pin wear and pin temperature. For the Fe alloy, wear was mixed (delamination and oxidation), and friction and wear coefficients were found to decrease with sliding velocity. The Al and Ti alloys displayed a different behaviour, characterised by the occurrence of sliding distance transitions at 0.8 and 1 m/s for the Al alloy, and at 0.4 up to 1 m/s for the Ti alloy. Before the transition, the wear coefficient of the Al alloy was very low, because of the presence of a compacted tribolayer on the sliding surface. After the transition wear was by delamination: the wear rate increased but the friction coefficient decreased. For the Ti alloy, wear occurred by oxidation and was quite high before the transition. After the transition, both the wear rate and the friction coefficient decreased, although the wear process became unstable with repeated oscillations in the friction coefficient. The results allowed us to highlight the role of flash temperature in determining the wear mechanisms of the alloys under study and the necessity of properly considering the sliding distance transitions to make reliable comparisons and obtain guidelines for safe operations.

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Section: Examination Of Wears Debris and Worn Surfacessupporting

confidence: 87%

Mild Sliding Wear of Fe–0.2%C, Ti–6%Al–4%V and Al-7072: A Comparative Study

Straffelini

Molinari

2010

Tribol Lett

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“…Some research has reported that multi-layer tribooxides would appear in severe conditions [5,6]. We also found in the prior studies that when multi-layer tribo-oxides formed under a high load, the wear rate was high [11,12]. It is clear that multi-layer tribo-oxides did not prevent wear, and even accelerated wear.…”

Section: Resultssupporting

confidence: 61%

“…However, when the substrate does not have enough strength to support the tribo-oxide layer, tribo-oxides may not reduce wear. In this case, the oxidative wear does not mean mild wear [11]. Generally, oxidation wear is identified by the existence of tribo-oxides on worn surfaces [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Analysis for Wear Behaviors of Oxidative Wear

et al. 2011

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Sliding wear tests were performed for H13 steel and a cast steel under atmospheric conditions of 25, 200, and 400°C. XRD results identify that oxidative wear prevailed for the steels during sliding at 200-400°C. However, the oxidative wear at 200°C presented entirely different wear behaviors from the one at 400°C. With an increase of load, the oxidative wear at 200°C exhibited slowly increased and lower wear rates, despite relatively less tribooxides. On the contrary, although there were more tribooxides, the oxidative wear at 400°C presented rapidly increased and higher wear rates. The former oxidative wear could be classified into mild wear; the latter one fell beyond mild wear. The two types of oxidative wear universally existed; their discrepancies were mainly attributed not to the tribo-oxides, but to the extent of softening and deformation of substrate. Hence, we suggested that the two types of oxidative wear should be distinguished in the coming research, and were termed oxidative mild wear and oxidative wear, respectively.

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“…As a result, the delamination of the oxide layer was accelerated, with the result that the wear rate increased. It is known that significant plastic deformation of the substrate would result in delamination of the substrate at the interface of the secondary phases with the matrix [11]. In this case, wear rate would be further increased.…”

Section: Results and Analysismentioning

confidence: 99%

Transition of Mild Wear to Severe Wear in Oxidative Wear of H21 Steel

et al. 2008

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Under atmospheric conditions at 400°C, we studied the wear mechanism of H21 steel with different tempering states as a function of normal load. Typical oxidative wear was identified by X-ray diffraction patterns with predominant tribo-oxides of Fe 3 O 4 and Fe 2 O 3 . Under loads of 50-100 N, mild oxidative wear prevailed for all samples, such that the wear losses of H21 steel with various tempering states showed no significant differences with characteristics of a slight plastic deformation of the substrate and single-layer oxide. In this case, the wear rate was lower, and the tribo-oxide was decisive factor in determining wear rate. Under loads of 150-200 N, the transition of mild wear to severe wear occurred in H21 steel and was characterized by: (1) a significant difference of wear losses for steel with various tempering states; (2) wear loss that started to increase faster and reached a relatively high level; (3) the appearance of significant plastic deformation in the oxide underneath the substrate and multi-layer tribooxide. Under a load of 200 N for the steel tempered at 700°C, plastic extrusion prevailed with a mixed metaloxide layer.

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Research on oxidation wear mechanism of the cast steels

Cited by 87 publications

References 21 publications

Mild Sliding Wear of Fe–0.2%C, Ti–6%Al–4%V and Al-7072: A Comparative Study

Mild Sliding Wear of Fe–0.2%C, Ti–6%Al–4%V and Al-7072: A Comparative Study

Analysis for Wear Behaviors of Oxidative Wear

Transition of Mild Wear to Severe Wear in Oxidative Wear of H21 Steel

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