Relations between oxidative wear and Cr content of steels
► Dry sliding wear mechanism and behavior depend on the role of tribo-oxides, which closely related with the chromium content of steels. ► Trace tribo-oxides reduced wear to some extent in adhesive wear. ► A small amount of tribo-oxides reached about 10 μm on contacting asperities and lead to mild o...
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Published in | Wear Vol. 272; no. 1; pp. 110 - 121 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
03.10.2011
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | ► Dry sliding wear mechanism and behavior depend on the role of tribo-oxides, which closely related with the chromium content of steels. ► Trace tribo-oxides reduced wear to some extent in adhesive wear. ► A small amount of tribo-oxides reached about 10
μm on contacting asperities and lead to mild oxidative wear. ► Cr-strengthened adhesion power of tribo-oxides and matrix result in high elevated-temperature wear resistance.
Dry sliding wear tests at 25–400
°C were performed for 45, 4Cr5MoSiV1 and 3Cr13 steels; the relations between oxidative wear and Cr content of steels were explored. The low and medium-Cr steels had a substantially lower wear rate and increasing tendency than the high-Cr steel at 25–200
°C, but the contrary case occurred at 400
°C. With an increase of ambient temperature, the wear rate of the low and medium-Cr steels first decreased, then increased and reached the lowest value at 200
°C, while the wear rate of the high-Cr steel decreased monotonously with the lowest value at 400
°C. At 25
°C, trace tribo-oxides reduced wear to some extent in adhesive-dominated wear for the low and medium-Cr steels. At 200
°C, a small amount of tribo-oxides formed and reached a thickness of 10
μm on contacting asperities in the low and medium-Cr steels, thus oxidative mild wear prevailed. At 400
°C, a great amount of tribo-oxides appeared in the low and medium-Cr steels; unexpectedly, the high-Cr steel had more tribo-oxides than the low or medium-Cr steels in some cases. Its high wear resistance may be attributed to Cr-strengthened adhesion power of tribo-oxides and matrix. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0043-1648 1873-2577 |
DOI: | 10.1016/j.wear.2011.08.005 |