Niobium-based elastic alloy refers to the niobium-based alloy used as elastic elements and components. In the alloy, the main part of titanium and niobium exist as niobium-titanium solid solution, while aluminum precipitates with niobium and titanium as the second phase of composite aluminides. Niobium-based elastic alloy has excellent properties such as high temperature resistance, corrosion resistance, high strength, good sensitivity, fast measurement response, high accuracy, non-magnetism, small temperature drift, wide frequency response range and so on. The alloys that have been developed and applied are mainly Nb-Ti-Ai alloys, in which the Ti content is 25-45% and the Al content is 4-5.5%. The most commonly used alloy is Nb-10Ti 5.5Al. In the alloy, the main part of titanium and niobium exist as niobic-titanium solid solution, while aluminum precipitates with niobium and titanium as the second phase of composite aluminides.
Smelting is one of the key techniques for preparing powder metallurgy sintered Nd-Fe-B permanent magnets, which directly affects the final magnetic properties of the magnets. Melting technique was used to prepare the components in this article adopts the traditional Nd15Fe78 - xNbxB7 series alloy ingot casting, based on the different content of niobium alloy ingot casting microstructure and composition analysis concluded that: with the increase of niobium content, microstructure of the alloy ingot by flake crystal and dendritic crystal to granular crystal, but also changed the grain morphology, alpha Fe neodymium rich phase The distribution is more uniform, thus improving the magnetic properties of the magnet.
Niobium-based elastic alloy has excellent properties such as high temperature resistance, corrosion resistance, high strength, good sensitivity, fast measurement response, high accuracy, non-magnetism, small temperature drift, wide frequency response range and so on. The metal niobium, titanium, aluminum (or first made into master alloy) is smelted twice in a consumable electric arc furnace, and the ingot is processed into bar, strip, sheet, wire and other profiles after hot processing, forging, rolling, drawing and so on. Sometimes it is processed into a corrugated diaphragm. Finally, the desired structure and shape are obtained by heat treatment. Niobium based elastic alloy has good elasticity, but the cost is relatively high, so they are mainly used in special occasions such as elastic components requiring high precision measurement under high temperature conditions and corrosive media or in the range of strong magnetic field. Various pressure sensors and instruments made of niobium-based elastic alloy components have been widely used in aviation, navigation, petroleum, chemical industry, geology, environmental protection, medical treatment and other departments.
