目的：进一步提高电沉积 Fe-ZrO2纳米复合镀层的性能。方法在45#钢基体表面电沉积 Fe-ZrO2纳米复合镀层,并进行激光重熔后处理。通过正交实验分析激光重熔参数对镀层显微硬度、结合力和表面形貌的影响,并优化重熔工艺。结果优化的工艺为：电流150 A,脉宽8 ms,频率15 Hz,扫描速率250 mm/ min,负离焦量2 mm。镀层经激光重熔后,硬度提高,纳米颗粒得到了细化,与基体形成了冶金结合。结论激光重熔可以改善 Fe-ZrO2纳米复合镀层的微观形貌,提高其性能。
Objective To further enhance the properties of Fe-ZrO2 Nanocomposite ceramic coating. Methods The Fe-ZrO2 nanocomposite ceramic coating was prepared on 45 steel surface by electrodeposition and then processed by laser remelting coating. A set of orthogonal experiments were used to analyze the effects of laser remelting parameters on the coating microstructure, hard-ness and binding force and optimize the remelting process. Results The optimized process was drawn as the followings: current 150 A, impulse width 8ms, frequency 15 Hz, scan rate 250 mm/ min, negative defocus amount 2 mm. After the laser remelted, the coating hardness had been improved, nanoparticles had been refined, the metallurgical bond had been formed between the coating and substrate. Conclusion The results show that after the laser remelting, the morphology and properties of Fe-ZrO2 nanocomposite ceramic coating have been improved.
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