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采用不同的工艺参数对工业纯铁进行了离子渗镍试验。结果表明 ,渗镍层由白亮层和树枝状结构层组成 ,白亮层为Fe Ni合金奥氏体沉积层 ,扩散层为铁素体。渗层深度随加热温度的升高和保温时间的延长而增加。白亮层中的Ni浓度随渗层的深度变化不大 ,树枝状扩散层的Ni浓度呈较大梯度分布。加热温度的升高、保温时间的延长可使工业纯铁铁芯的磁性增强 ,渗Ni后样品的磁性均优于化学镀Ni样品。经离子渗Ni的样品具有良好的防腐蚀性能。
Using different process parameters of industrial pure iron ion infiltration nickel test. The results show that the nickel infiltration layer is composed of white bright layer and dendritic structure layer, the white bright layer is the austenite deposit of Fe Ni alloy, and the diffusion layer is ferrite. Penetration layer depth with the heating temperature and holding time increased. The concentration of Ni in the white layer changes little with the depth of the layer, and the Ni concentration in the dendritic diffusion layer shows a gradient distribution. The increase of heating temperature and the prolongation of holding time can enhance the magnetic properties of industrial pure iron core, and the magnetic properties of samples after infiltration are better than that of electroless Ni plating. The ion-infiltration of Ni samples have good corrosion resistance.