| LIU Xiao-ming,GAO Yun-peng,YAN Hou-xia.Effects of Load and Temperature on the Frictional Wear Resistance of Fe-Al/Cr3C2 Composite Coating[J],45(11):55-61 |
| Effects of Load and Temperature on the Frictional Wear Resistance of Fe-Al/Cr3C2 Composite Coating |
| Received:April 06, 2016 Revised:November 20, 2016 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2016.11.008 |
| KeyWord:Fe-Al/Cr3C2 composite coating load temperature frictional wear |
| Author | Institution |
| LIU Xiao-ming |
Inner Mongolia Electric Power Science and Research Institute, Hohhot , China |
| GAO Yun-peng |
Inner Mongolia Electric Power Science and Research Institute, Hohhot , China |
| YAN Hou-xia |
Inner Mongolia Energy Power Jinshan Thermal Power Co., Ltd., Hohhot , China |
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| Abstract: |
| The work aims to study frictional wear resistance of Fe-Al/Cr3C2 composite coating under different load and temperature in order to provide theoretical basis for resolving frictional wear problems by using Fe-Al/Cr3C2 composite coating under different operation conditions. The frictional wear resistance of Fe-Al/Cr3C2 composite coating was tested by using THT07-135 high-temperature friction-abrasion testing machine at 3 N, 5 N, 7 N load and room temperature (25 ), 300 , 450 , 550 , 600 respectively. Wear scar images and composite ℃ ℃ ℃ in different regions were analyzed by SEM with EDAX. Microstructures were analyzed by TEM. Friction coefficient of coating decreased and wear loss of the coating increased as the load increased. Effects of the load to wear loss reduced gradually as the temperature increased. Under the same load, friction coefficient of the coating first increased and then decreased. Friction coefficient was the maximum at 450 . Overall, wear l ℃ oss of the coating showed a downtrend and was the minimum at 450 ℃ . At lower temperature, the main wear mechanism was delamination wear caused by brittle fracture. When the temperature was up to 450 , the main mechanisms were brittle fracture, ℃ plastic deformation and little adhesive wear. When the temperature was higher than 550 , the main mechanisms were adh ℃ esive wear and plastic deformation. The Fe-Al/Cr3C2 composite coating has better high-temperature frictional wear resistance. Transformation between B3 phase and D03 phase improves the high-temperature frictional wear resistance of the coating as the oxides increase and substrate Fe-Al intermetallics is at high temperature. |
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