Process for preparing invor alloy foil

Abstract

The invention relates to a Invar alloy foil manufacturing method. It belongs to precious alloy field. The Invar alloy is Fe-Ni alloy with 35-37% (wt%) nickel. The manufacturing method is electro deposition. Electrolyte is sulfate system with low metal salt density. Buffer, complexing agent, brightener, auxiliary, and 304 stainless steel, Ir2; the distance of cathode and anode is 10-30mm; the electro deposition time is 5-50min. and it includes the following steps: putting cathode in electroplating solution; electrifying direct current for curtain time; depositing Invar alloy on the cathode; taking it out; cleaning; drying; peeling off the formed Fe-Ni alloy layer to form Invar alloy foil.

Description

technical field [0001] The invention belongs to the field of precision alloys, that is, the field of functional materials, and relates to a preparation method of Invar alloy foil. Background technique [0002] Invar alloy is an iron-nickel alloy with a nickel content of 35-37% (wt%). Due to its good magnetic properties, good flexibility and compact structure, it has been widely used in precision instruments, optical instruments and electronic equipment. components. [0003] There are many methods for preparing Invar alloy, such as cold plastic deformation, sputtering film formation, melting casting, twin-roll ultra-quick cooling method, etc. However, compared with the above preparation techniques, the electrodeposition method has the following advantages: the electrodeposition layer has a unique high density and low porosity; it is easy to control the chemical composition of the material by changing parameters, electrolyte composition and other conditions in the process; it...

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Problems solved by technology

[0004] In the prior art, ("Surface Technology" in the 25th period of 2000 "The Thermal Expansion Research of Electroplated Nickel and Iron-Nickel Alloy Thin Film" Liu Xiaowei) and (Michel L, Trudean.Nanocrystalline Fe and Fe-RichedFe-Ni Through Electrodeposition.Nanostructured Materials, 1999, 12: 55-60) all disclose the method for preparing Invar alloy by electrodeposition method, but the above-mentioned method still has deficiencies and needs to be further improved, that is, the concentration of metal ions is relatively large, and the production cost is relatively high. The performance of the electrolyte is not stable enough, the oxidation resistance is low, the electrodeposited layer has high hardness and poor toughness

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