Explanation

Based on niobium, alloy formed by adding other elements are usually strengthened by solid solution, carbon, nitride or silicide to improve their properties. Compared with tungsten and molybdenum alloy, niobium alloy allows more kinds of elements to be added, and the total amount is larger. In niobium alloy, the addition of tungsten, molybdenum, tantalum and other elements can play a solid solution strengthening role, and the addition of titanium, zirconium, hafnium, yttrium, vanadium, chromium, aluminum and other metal elements, as well as a certain proportion of carbon, nitrogen, oxygen, can form a dispersed second phase, playing a dispersion strengthening role. These strengthening mechanisms can significantly improve the strength and properties of alloy. Niobium titanium alloy and niobium tin alloy are widely used as superconducting materials, while niobium titanium aluminum alloy can be used not only as high-strength structural materials, but also as nonmagnetic and constant elastic materials. niobium alloy is usually prepared by electron beam melting or electron beam induction melting to ensure that alloy elements are fully alloy and improve purity. The powder metallurgy method can also be used to prepare components with complex shapes. Electron beam melting is usually used to purify alloy, while vacuum induction melting is used to adjust the composition, prepare uniform alloy, and add volatile elements. The prepared ingots can be made into various shapes of materials and profiled materials through extrusion, forging, rolling and other deformation processes.

Classification