Tantalum has a melting point of 2980 ° c, second only to tungsten (3380 ° c) among the commonly used refractory metals, and its density is 16.67g /cm3. When annealed, tantalum has good plasticity and is stable at high temperature. It can absorb and hold gas. Tantalum is acid-resistant and biocompatible. Tantalum is widely used in electronics, chemical, medical and other industries. At the same time, tantalum is also an indispensable material for making hard alloy.
Tantalum has high melting point, high density, good plasticity when annealed and stable performance at high temperature. After annealing, tantalum material is soft and tough, which causes serious adhesion during cutting and causes bonding wear of the tool. Especially when the cutting speed is lower than 20m/min, the phenomenon of adhesion and tearing is more serious. When the cutting speed is higher than 40m/min, the tearing phenomenon is greatly reduced. The cutting tool should be as sharp as possible and the cutting speed should not be too low.
With the further development of various application fields, the national tantalum-niobium industry and the implementation of the scientific concept of development requirements, China's tantalum-niobium industry must stand in the height of promoting the overall progress and development, take the initiative to deal with the contradictions and problems in the process of development. With the development of the world's electronics, metallurgy, aerospace, aviation and other high and new technology, the international market for tantalum powder, tantalum wire and other rare metal smelting and processing of new materials, tantalum niobium crystal materials and niobium alloy demand is increasing. At present, foreign tantalum and niobium smelters and processing industries are implementing global economic integration and integration, actively exploring the market and improving the market share. The technical development of tantalum and niobium products will greatly improve the technical level and international competitiveness of tantalum and niobium products in China, and establish the situation that China's national industry has one of the three worlds in the international competition of tantalum and niobium products.
