(福州大学 材料科学与工程学院，福州 350108)
摘 要: 采用可溶性Ni阳极电刷镀方法制备纳米晶Ni-Fe合金镀层，利用XRD、SEM、TEM、显微硬度计等测试方法分析低温退火对镀层结构和性能的影响。结果表明：纳米晶Ni-Fe合金镀层的硬度随退火温度的升高而提高，在200 ℃时达到最大值，存在明显的退火再强化；继续提高退火温度导致镀层硬度降低；400 ℃退火后的镀层硬度与镀态的接近；纳米晶Ni-Fe合金镀层退火过程没有出现晶粒异常长大，表现出比纯Ni镀层更高的热稳定性。
关键字: 电刷镀；Ni-Fe合金镀层；退火再强化；热稳定性
（College of Materials Science and Engineering, Fuzhou University, Fuzhou 350002, China）
Abstract: Nanocrystalline Ni-Fe alloy coatings were synthesized by brush plating using soluble anode. Microhardness test and techniques of XRD, SEM and TEM were applied to characterize the microstructures and mechanical properties of Ni-Fe alloy coatings. The results show that the microhardness of Ni-Fe alloy coatings increases with increasing annealing temperature and reaches a peak value at 200 ℃, showing a significant hardening during annealing. With further increasing annealing temperature, the microhardness decreases gradually, but the microhardness of the coating after being annealed at 400 ℃ is still as high as that of the as-deposited sample. The abnormal grain growth is not observed during annealing of Ni-Fe alloy coatings, which indicates a better thermal stability.
Key words: brush plating; Ni-Fe alloy coating; annealing hardening; thermal stability
