Ge Zhihua,Wu Haiyong*,Zhang Liu.Study on properties of Co-W/CeO 2 composite coatings electrodeposited on structural steel[J].Plating & Finishing,2024,(3):16-24.[doi:10.3969/j.issn.1001-3849.2024.03.003]
结构钢电沉积Co-W/CeO2复合镀层及其性能研究
- Title:
- Study on properties of Co-W/CeO 2 composite coatings electrodeposited on structural steel
- 关键词:
- Co-W/CeO 2 复合镀层; 电沉积; CeO 2 颗粒; 结合力; 高温抗氧化性能
- Keywords:
- Co-W/CeO 2 composite coating ; electrodeposition ; CeO 2 particles ; binding force ; high temperature oxidation resistance
- 分类号:
- TQ153
- 文献标志码:
- A
- 摘要:
- 选择 CeO 2 颗粒作为复合相，利用电沉积技术在普通结构钢表面制备出 Co-W/CeO 2 复合镀层，并研究镀液中 CeO 2 颗粒浓度对复合镀层的微观形貌、化学成分、结合力、硬度、耐磨性能以及高温抗氧化性能的影响。结果表明： Co-W/CeO 2 复合镀层与基体结合牢固，表面分布着类似胞状的晶粒团聚体，其化学成分为 Co 、 W 、 Ce 和 O 元素。随着镀液中 CeO 2 颗粒浓度从 2 g/L 升高到 15 g/L ，复合镀层的晶粒团聚体尺寸差异先减小后增大，吸附在晶粒团聚体表面及边界处的 CeO 2 颗粒量先增多后减少，导致复合镀层的硬度、耐磨性能和高温抗氧化性能都呈先增强后下降的趋势。当镀液中 CeO 2 颗粒浓度为 8 g/L 时， Co-W/CeO 2 复合镀层的晶粒团聚体大小较为均匀，具有良好的致密性，其表面粗糙度仅为 0.39 μ m 。该复合镀层的硬度较 Co-W 合金镀层增大约 76 HV ，表现出良好的耐磨性能和高温抗氧化性能，摩擦系数和氧化增重量仅为 0.43 和 0.74 mg/cm 2 。
- Abstract:
- ： Co-W/CeO 2 composite coatings were prepared on the surface of ordinary structural steel by electrodeposition ， and the effect of concentration of CeO 2 particles in the bath on the microstructure ， chemical composition ， binding force ， hardness ， wear resistance and high temperature oxidation resistance of the composite coating was investigated. The results show that Co-W/CeO 2 composite coating is firmly bound to the substrate ， there are cell like grain aggregates distributed on the surface ， with chemical compositions of Co ， W ， Ce ， and O. As the concentration of CeO 2 particles in the bath increased from 2 g/L to 15 g/L ， the difference of grain aggregate size of the composite coating first decreased and then increased ， and the amount of CeO 2 particles adsorbed on the surface and boundary of the grain aggregate first increased and then decreased. As a result ， the hardness ， wear resistance and high temperature oxidation resistance of the composite coating increased first and then decreased. When the concentration of CeO 2 particles in the bath is 8 g/L ， the Co-W/CeO 2 composite coating has good densification ， the grain aggregate size is more uniform ， and its surface roughness is only 0.39 μ m. The hardness of the composite coating is about 76 HV higher than that of Co-W alloy coating ， and the composite coating also shows good wear resistance and high temperature oxidation resistance. The friction coefficient and oxidation weight gain are only 0.43 and 0.74 mg/cm 2 .
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备注/Memo
收稿日期： 2023-11-08 修回日期： 2023-12-20 作者简介： 葛志华（ 1980 —），讲师，主要研究方向：建筑结构材料、机械工程技术等， email ： gzh_1999@126.com 。 * 通信作者： 武海勇（ 1979 —），讲师，主要研究方向：金属表面处理、建筑结构材料等， email ： Vocational_517@126.com 。 基金项目： 河北省重点研发计划项目（ 18274517 ）?/html>