Tantalum alloy formed by adding a certain amount of other elements to tantalum as a base. Tantalum metal not only has good plasticity, but also resists the corrosion of many high temperature corrosive media, and its chemical corrosion resistance is similar to that of glass. Except for the chemical corrosion with hydrofluoric acid, fluorinated ionic solution, fuming sulfuric acid, sulfur trioxide and alkali, pure tantalum has almost no chemical reaction with all inorganic acids and organic acids. Therefore, tantalum metal is widely used in the important acid industry, petrochemical industry, food and pharmaceutical industry and other sectors, manufacturing high temperature corrosion resistant reactors, heat exchangers, evaporators, high temperature springs, valve stems and valves, as well as human implant materials. However, due to the scarcity of tantalum resources and the complexity of the extraction metallurgical process, the cost of tantalum is very high and the price is expensive. In order to make full use of the advantages of tantalum corrosion resistance, scientists have carried out research work on saving tantalum and replacing tantalum, and successfully developed some tantalum alloys with higher strength than pure tantalum, corrosion resistance and processing plasticity similar to pure tantalum, which has promoted the application of tantalum in industry and promoted the development of refractory metal industry.
Ta and Ta alloy have high density, high melting point, corrosion resistance, excellent high temperature strength, good workability and weldability, and low plastic and brittle transition temperature, and are widely used in electronics, chemical, weapons and other industries. Among refractory metals,Ta has the best low temperature plasticity, and its plastic-brittleness transition temperature is lower than -196℃. At the same time, Tantalum has excellent corrosion resistance to corrosive media such as dry chlorine, wet chlorine, chlorinated water, hypochlorous acid, hypochlorite and hydrochloric acid, which was used by LosAlamos National Laboratory in the United States Ta alloy has good corrosion resistance to molten plutonium, and it is used as the smelting crucible and stirrer raw material of nuclear raw material plutonium. The mechanical properties of Tantalum and Tantalum alloys are affected by internal factors such as trace impurity content and crystal structure, and are sensitive to the change of temperature and strain rate, which has attracted the attention of many scholars at home and abroad.
