| DONG Tian-shun,ZHENG Xiao-dong,MENG Hong-jie,FU Bin-guo,LI Guo-lu,LI Ya-long.Preparation and Wear Properties of Fe-based Argon Arc Remelting Coating[J],47(12):155-165 |
| Preparation and Wear Properties of Fe-based Argon Arc Remelting Coating |
| Received:July 19, 2018 Revised:December 20, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.12.022 |
| KeyWord:Fe-based coating argon arc remelting orthogonal optimization wear properties |
| Author | Institution |
| DONG Tian-shun |
1.School of Material Science and Engineering, Hebei University of Technology, Tianjin , China |
| ZHENG Xiao-dong |
1.School of Material Science and Engineering, Hebei University of Technology, Tianjin , China |
| MENG Hong-jie |
2.Department of Mechanical Engineering, Tangshan Industrial Vocational Technical College, Tangshan , China |
| FU Bin-guo |
1.School of Material Science and Engineering, Hebei University of Technology, Tianjin , China |
| LI Guo-lu |
1.School of Material Science and Engineering, Hebei University of Technology, Tianjin , China |
| LI Ya-long |
1.School of Material Science and Engineering, Hebei University of Technology, Tianjin , China |
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| Abstract: |
| The work aims to prepare high quality Fe-based argon arc remelting coating and study the effect of argon arc re-melting treatment on the wear properties of as-sprayed coating under different loads. Four main remelting parameters (current, velocity, arc length and step length) of Fe-based remelted coating were optimized by orthogonal test, and the porosity and mi-crohardness were used as indicators to comprehensively evaluate the quality of Fe-based remelted coating. The phase composition of the coating was evaluated by X-ray diffraction, the wear resistance of the coating was tested by UMT-3 multi-function friction and wear tester, and wear scar was characterized by three dimensional surface profiler. The morphology of the powders, the microstructure of the coating and the failure morphology of the coatings were analyzed by scanning electron microscope (SEM). High quality Fe-based argon arc remelting coating could be obtained by orthogonal test, and the three main parameters optimized by orthogonal test were current of 70 A, speed of 200 mm/min, arc length of 2 mm and step length of 2 mm. With the increase of the experimental load, the friction coefficient of the as-sprayed coating and the remelted coating increased. While, the friction coefficient of the remelted coating was smaller than that of the as-sprayed coating under the same experimental load. The main failure modes of the as-sprayed coating were spalling and abrasive wear, showing the characteristics of brittle fracture. The main failure modes of the remelted coating were adhesive wear and fatigue wear, displaying the characteristics of plastic deformation and pear gully. The wear volume of the remelted coating respectively decreased by 32.1%, 51.5%, 60.7% and 55.7% than the as-sprayed coating under the load of 10、20、30 and 40 N. Therefore, the microstructure and wear resistance of Fe-based coating are greatly improved by argon arc remelting treatment, when compared with original Fe-based coating. |
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