What effect does heat treatment have on the structure and mechanical properties of pure tantalum sheet?

Many friends are familiar with the metal material pure tantalum sheet. It has a high melting point, good electrical and thermal conductivity, high chemical stability, excellent high-temperature strength, good processability, and can be Weldability, low plastic-to-brittle transition temperature, excellent dynamic mechanical properties, and the formation of a dense, stable, high dielectric constant amorphous oxide film on the surface after oxidation treatment, etc., and are widely used in electronics, chemical industry, aerospace, etc. , military weapons, medical and health and other fields.

Pure tantalum sheet are mainly used in the electronics industry. Tantalum capacitors have small size, large capacity, high reliability, long life, good voltage resistance and stable function. They have been widely used in communications, computer integrated circuits, automotive electronic control systems, digital appliances, etc. Extremely wide range of applications.

The casing of the all-tantalum capacitor is a deep-drawn cup-shaped piece. Domestic pure tantalum plates are prone to cracking, wrinkling, orange peeling, and earring when deep-drawing the tantalum casing. The yield is low and it is difficult to achieve high performance. , high reliability requirements. At present, the effects of cold deformation and heat treatment processes on the mechanical properties of pure tantalum plates have not been studied. Here, the stretch stamping forming of medical tantalum capacitors is used as the application background. By controlling the heat treatment process, the mechanical properties of tantalum and its tensile deformation mechanical properties are studied, which provides a theoretical basis for formulating tantalum stretching processing technology.

The morphology analysis of the tensile fracture shows that after pre-deformation and heat treatment, the pure tantalum plate changes from ductile fracture to brittle fracture. The fracture mechanism is mixed fracture, consisting of intergranular fracture, cleavage fracture and ductile fracture. The fracture morphology The analysis and mechanical properties results are the same.