Research On Fe-Ni Alloy Surface Flexibility Treatment Process Based On Nano-perfusion Technology

Due to their high hardness,iron-nickel alloy tools often damage the surface of parts and materials during use.In this paper,according to the requirements of project development and application,the surface flexibility of the iron-nickel alloy products is modified to reduce the damage to the parts caused by the hard collision during its use.In this thesis,the iron-nickel metal alloy is used as the substrate,and the alloy surface is treated by anodizing method.The influence of different process parameters on the formation of micro-nano structure on the surface of the alloy is systematically studied,and the formation process of the porous structure of the alloy surface is studied;on this basis,the in-situ growth of carbon nanotubes in the porous structure of the anodized alloy surface was studied,and the metal/resin composite material was formed by Nano-Perfusion Technology.(1)Using a certain tool material of iron-nickel metal alloy as a substrate,the influence of chemical treatment and anodization on the nanostructure of the alloy surface was studied,and the influence of anodizing process conditions on the nanostructure of the alloy surface was explored.The results show that when the anodic oxidation time is 60 min,the voltage is 20 V,the reaction temperature is 20?,and the electrolyte concentration is 0.1 mol/L,it can form0.5-1.5?m uniform and regular micro-nano porous structure on the surface of the alloy.Further optimization of the experimental results also found that the two-step anodization can form a similar micro-nano porous structure on the surface of the alloy.The structure of the alloy surface after one-step and two-step anodization was characterized,and it was confirmed that the porous nanostructure of Fe-Ni oxide formed on the surface of the alloy after anodization.(2)Facing the engineering application of anodized alloy surface porous structure,directly grow carbon nanotubes(CNTs)in the anodized alloy surface porous structure by in-situ CVD method,it can be found that when the growth time is 10 s,the growth temperature is 650°C,and the flow ratio of C₂H₂:Ar is 10sccm:100sccm,shorter length CNTs can be grown in porous structure.When the time is increased to 30 s,CNTs nano-array structure can be formed in the porous structure of the alloy surface.The structure of CNTs grown in situ was characterized,and the structure showed that the grown product contained Ni and Fe elements from the catalyst;Further analysis,it is believed that the in-situ growth process belongs to the iron-nickel-catalyzed carbon tube growth contained in the alloy itself.(3)Using the alloy of in-situ growth of CNTs as the substrate,the anodized alloy/CNTs-epoxy composite material is prepared by nano-infusion technology,Comparative study of the effect of alloy surface modification methods on the interface bonding performance between alloy and resin.The results show that in-situ growth of CNTs on the modified alloy surface can significantly improve the interface bonding performance between metal and resin,and its effect is much higher than that of mechanical treatment and T-treatment methods reported in the literature.Analysis mainly due to the growth of carbon nanotubes increases the binding force between the alloy and the resin,and during perfusion interface between carbon and the resin tube also forms a strong chemical action,thereby increasing the adhesive properties of the interface.