| 摘要: |
| 采用电弧喷涂技术在低碳钢Q235基体上制备铁基TiC复合涂层，利用箱式电阻炉对涂层进行400、500、600、700和800 ℃的热处理，研究其对铁基TiC复合涂层组织和磨粒磨损性能的影响。利用光学显微镜、扫描电子显微镜（SEM）和X射线衍射仪（XRD）对涂层的显微组织结构、磨损表面和相组成进了分析和研究。结果表明： 热处理对FeTiC复合涂层的组织、硬度和耐磨性有显著影响，500~700 ℃热处理能够改善电弧喷涂铁基TiC涂层的耐磨性；500 ℃热处理后的涂层具有较好的耐磨损性能；随着热处理温度的增加，涂层中出现更多的氧化物相，涂层的磨损机理由犁沟切削和脆性脱落逐步转化为以脆性脱落为主。 |
| 关键词: 热处理 电弧喷涂 复合涂层 磨损性能 |
| DOI：10.3969/j.issn.1007-9289.2014.03.014 |
| 分类号: |
| 基金项目: |
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| Influence of Heat Treatment on Microstructure and Wear Behavior of Fe-TiC Composite Coatings |
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ZHANG Fayun, HE Dingyong, JIANG Jianmin, DENG Dong1,2
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1. Department of Nuclear Equipment Regulation, Nuclear and Radiation Safety Center, Beijing 100082;2. College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022
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| Abstract: |
| The Febased alloy carbide composite coating was deposited onto Q235 mild steel substrate using arc spray technique and then heat treated at different temperatures in a resistance stove. The coatings were then evaluated in the as sprayed and heat treated conditions. The microstructure and phase construction of composite coating were analyzed by scanning electron microscope (SEM) and Xray diffraction (XRD). Tribological properties were studied under wet condition by using pin on the disc machine. The results show that heat treatment has a significant impact on the microstructure, hardness and wear resistance of FeTiC composite coating. Heat treatment at 500700 ℃ can improve the wear resistance of arc sprayed TiC coatings, as sprayed deposit and heat treatment at 500 ℃ has the best wear resistance. The oxide phase in heat treatment samples increases by increasing the heat treatment temperature and the wear mechanism gradually changes from microploughing and brittle fracture to gouging abrasion. |
| Key words: heat treatment arc spraying composite coating wear behavior |
