| PTA clad (Cr,Fe)7C3/γ-Fe in situ ceramal composite coating |
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| 作者姓名： | Junbo Liu Limei Wang Jihua Huang |
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| 作者单位： | School of Mechanical and Electronic Engineering, Weifang University, Shandong Weifang 261061, China |
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| 摘 要： | A wear-resistant (Cr, Fe)7C3/γ-Fe in situ ceramal composite coating was fabricated on the substrate of 0.45wt%C carbon steel by a plasma-transferred arc cladding process using the Fe-Cr-C elemental powder blends. The microstructure, microhardness, and dry-sliding wear resistance of the coating were evaluated. The results indicate that the microstructure of the coating, which was composed of (Cr, Fe)7C3 primary phase uniformly distributed in the γ-Fe, and the (Cr, Fe)7C3 eutectic matrix was metallurgically bonded to the 0.45wt%C carbon steel substrate. From substrate to coating, the microstructure of the coating exhibited an evident epitaxial growth character. The coating, indehiscent and tack-free, had high hardness and appropriate gradient. It had excellent wear resistance under the dry sliding wear test condition.
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| 关 键 词： | plasma-transferred arc cladding (Cr Fe)7C3/γ-Fe coating microstructure wear-resistance |
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