| 摘要: |
| 采用电弧喷涂含TiC陶瓷粉末的粉芯丝材，在低碳钢基体上制备了铁基复合涂层。用MLS-225型湿砂橡胶轮磨损试验机测试了涂层的抗磨粒磨损性能。利用光学显微镜、SEM、XRD分析技术对涂层的显微组织结构、磨损表面和相组成进了研究。结果表明：采用电弧喷涂工艺可制备含TiC陶瓷硬质相的复合涂层，在铁基体上弥散分布着一定量的TiC硬质颗粒，使整个涂层得到强化，涂层显微硬度平均值约为1137HV0.1，涂层的抗磨粒磨损性能较好，相对Q235钢提高T6倍。涂层磨损机制主要为犁沟切削和脆性断裂。 |
| 关键词: 铁基复合涂层 电弧喷涂 TiC陶瓷 耐磨粒磨损 |
| DOI： |
| 分类号: |
| 基金项目:北京市自然科学基金 (2062005) 资助项目 |
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| Study on Iron Base Arc Spraying Cored Wire with TiC Ceramic Powders |
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HE Ding-yong,ZHANG Fa-yun,JIANG Jian-min,FU Bin-you,LI Zhuo-xin,WANG Zhi-hui
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College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
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| Abstract: |
| Iron base composite coatings were deposited on mild steel substrate by arc spraying using cored wire with TiC ceramic powders. The abrasive wear resistance was examined on the MLS-225 model wet sand/rubber wheel tester. The microstructure, phase compositions and worn surface morphologies of the coatings were observed by means of optical, scanning electron microscopy and X-ray diffraction. The results showed that the composite coating was obviously reinforced by the TiC hard particles distributed in the iron-based coating. The average microhardness of the coating was about 1137 HV0.1. it showed excellent abrasive wear resistance about 6 times higher than that of the Q235 mild steel. Wear mechanisms of coating was mainly micro-ploughing and brittle fracture. |
| Key words: iron-based composite coating arc sprayed TiC ceramic abrasive wear resistance |
