激光重熔对纳米Ni-Al2O3复合镀层耐腐蚀性能的影响
Effect of Laser Remelting on Corrosion Resistance of Ni-Al2O3 Nano-composition Coating
陈劲松, 乔 斌, 杨建明, 陈书法
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作者单位：淮海工学院 机械工程学院, 江苏 连云港 222005
中文关键字：激光重熔； 纳米复合镀层； 喷射电镀； 耐腐蚀性能
英文关键字：laser remelting; nano-composite coating; jet-electroplating; corrosion resistance
中文摘要：利用喷射电镀方法在45钢基体表面制备了Ni-Al2O3纳米复合镀层，并对其进行了激光重熔处理。采用扫描电镜分析了Ni-Al2O3复合镀层和激光重熔层的微观组织，利用X射线能谱仪对镀层的元素进行元素分析，分别测试了基体材料及经过激光作用前后复合镀层的耐腐蚀性。 结果表明：在优化的实验参数条件下，喷射电镀工艺能够制备出1.44wt%的纳米Ni-Al2O3的复合镀层，激光处理后，强化层与基体形成冶金结合，与基体相比，镀件的耐腐蚀性明显提高。
英文摘要：Ni-Al2O3 nano-composition coating was prepared using jet-electroplating technology on the surface of 45 steel, then the coating was processed by laser remelting. The microstructure of nano-composite coating and the remelting coating was analysed using SEM. The elements contribution was analyzed using EDS. The results indicate that the nano-Al2O3 particle content in composite is up to 1.44wt%, which is fabricated by jet-electroplating under the optimum process parameters. After laser remelting, the nano-composite coating is metallurgically bonded with substrate, and the corrosion resistance is obviously increased.