PTA clad (Cr,Fe)_7C_3/γ-Fe in situ ceramal composite coating

查看全文 作　　者：Junbo [1]Liu;Limei [2]Wang;Jihua [3]Huang

机构地区：[1]School of Mechanical and Electronic Engineering, Weifang University, Shandong Weifang 261061, China;[2]School of Information and Control Engineering, Weifang University, Shandong Weifang 261061, China;[3]School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《Journal of University of Science and Technology Beijing》索引2006年第13卷第6期,共4页

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. 关键词：等离子转移弧覆层微结构阻抗 PTA

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PTA clad (Cr,Fe)_7C_3/γ-Fe in situ ceramal composite coating

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