Tantalum metal has the characteristics of high melting point, high density, corrosion resistance, good ductility, etc., and is widely used in electronics industry, alloy industry and other fields. With the development of science and technology and the evolution of the concept of miniaturization, miniaturization products are increasingly widely used. Tantalum foil can be used as a solid electrolytic capacitor with large capacity, small size and stable performance, used in radar, missiles, supersonic aircraft and electronic computers, and can also be used as electronic transmitting tube and high-power tube parts material. The preparation of miniaturized products requires a large number of small size (micron level or less) metal foil, and the foil as a key material of the product must have the required performance.
Annealing strengthening process for rolled pure tantalum foil includes: surface treatment; Vacuum package; The rolled pure tantalum foil is subjected to vacuum annealing treatment, the rolling deformation of the rolled pure tantalum foil is not less than 50%, the annealing temperature is 700℃ ~ 850℃, the holding time is 1h ~ 1.5h, and the air cooling is carried out after the heat preservation is completed. The annealing method of the rolling tantalum foil can significantly improve the tensile strength and plastic deformation of the rolling pure tantalum foil, indicating that the rolling tantalum foil can improve its mechanical properties through the annealing process of the invention.
The elongation of the material can represent the plastic deformation ability of the material. It can be seen from Table 1 that the annealing method of the rolling tantalum foil can significantly improve the tensile strength and plastic deformation of the rolling tantalum foil, indicating that the rolling tantalum foil can improve its mechanical properties through the annealing process of the invention.
