Tantalum tape and preparation method thereof

Abstract

The invention relates to the technical field of metal materials. The invention provides a tantalum tape and a preparation method thereof. The preparation method of the tantalum tape particularly comprises the steps of: a) sintering tantalum powder to obtain a tantalum rod and forging the tantalum rod; b) rolling the tantalum rod obtained in the step a) and carrying out heat treatment for a tantalum strip obtained by rolling; c) rolling the tantalum strip obtained in the step b) again, and carrying out the heat treatment again for the tantalum strip obtained by rolling so as to obtain the tantalum tape. In the process of preparing the tantalum tape, the initial tantalum rod with uniform and fine crystal particles is firstly obtained through high-temperature sintering; then the tantalum rod is forged to be deformed; and finally, the tantalum rod is subjected to rolling for twice to enable the tantalum rod to be machined in multiple directions and facilitate to uniformity of the tantalum rod in each direction. Meanwhile, heat treatment is carried out after the rolling, so that residual stress in the machining process is removed, and the finally prepared tantalum tape is composed of uniform and fine isometric crystals.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a tantalum strip and a preparation method thereof. Background technique [0002] Tantalum and tantalum alloys have high melting point, good electrical and thermal conductivity, high chemical stability, excellent high temperature strength, good processing performance, low plastic-brittle transition temperature, excellent kinetic properties, and the surface forms dense, The advantages of stability and high dielectric constant are widely used in the fields of electronics, chemical industry, aerospace, military weapons, medical and health, etc., and are known as the rising star in the "Kingdom of Metals". Metal tantalum is mainly used in the electronics industry, among which tantalum capacitors are widely used in communications, computer integrated circuits, automotive electronic control systems and digital appliances due to their small size, large capacity, high reliability,...

AI Technical Summary

Problems solved by technology

However, the grain size of the tantalum strips produced by the above process is not uniform, and there are large grains; the isotropy of the final plate is poor, and there is a big difference between the mechanical properties of the other directions and the transverse and longitudinal directions, so that the tantalum strips can be used in deep drawing. Cracking, wrinkling, orange peel, and earing are easy to occur when stretching the tantalum shell, which will result in low yield of tantalum capacitors, and it is difficult to meet the requirements of high performance and high reliability.