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| Friction and Wear Performance of Carbide (Cr, Fe)7C3-reinforced Fe-based Composite Coating |
| YUAN Youlu1, 2 LI Zhuguo2** |
1. School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002
2. School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240 |
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Cite this article:
YUAN Youlu, LI Zhuguo**. Friction and Wear Performance of Carbide (Cr, Fe)7C3-reinforced Fe-based Composite Coating. Chinese Journal of Materials Research, 2013, 27(6): 622-630.
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Abstract Carbide (Cr, Fe)7C3-reinforced Fe-based composite coating was fabricated by plasma transferred arc (PTA) cladding with Fe-CrNiBSi and Cr3C2 powder blends. The nucleation and growth of (Cr, Fe)7C3 were observed and analyzed by OM, SEM, EDS, XRD, simultaneous DSC-TGA, and thermodynamic analysis (TA). And the friction and wear performances of (Cr, Fe)7C3-reinforced Fe-based composite coating were measured by using M-2000 tester. The SEM results show that plenty of (Cr, Fe)7C3 with long hexagonal shape in-situ grow on the survived Cr3C2 particle. The TA results show that Cr3C2 can effectively act as the substrate for the nucleation of (Cr, Fe)7C3 rod, thus can promote the formation of (Cr, Fe)7C3 rod in the composite coating. Further, there are some holes inside the rod, and some cracks outside the rod. These cracks always formed near the intersections between rods. During the variable loads dry sliding friction and wear process, the wear resistance of (Cr, Fe)7C3-reinforced coating is higher than that of the pure Fe-CrNiBSi alloy coating. But there are a lot of vertical cracks on the worn surface of (Cr, Fe)7C3 rod along the sliding direction due to the high brittleness and low fracture toughness of the rod.
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| Fund: Supported by the National Natural Science Foundation of China No.51171116, the Ministry of Science and Technology of the People's Republic of China No.2009DFB50350, the Research Foundation of Education Bureau of Hubei Province No.Q20122304 and the Doctoral Starting up Foundation of Hubei University of Automotive Technology No. BK201205. |
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