The preparation method of niobium zirconium alloy wire for electric light source includes the following steps: 1. The Niobium zirconium alloy ingot is forged by falling mold and drawing length, and the forging blank is obtained; 2. The forging blank is annealed in the first stage; 3. Pass rolling is carried out to get rolling billet; 4. The rolling billet is annealed in the second stage; 5. Stretch roll die to get stretched blank; 6. Carry out the third-stage annealing treatment on the stretched blank; 7. Forming and drawing to get semi-finished wire; Eight, carry on the fourth stage annealing treatment, get the niobium zirconium alloy wire for electric light source. The invention has the advantages of simple preparation process, easy realization, high yield and high production efficiency. The niobium zirconium alloy wire prepared by the invention has excellent surface quality, excellent mechanical properties and uniform grain, and can be widely used in the electric light source industry.
With niobium zirconium alloy produced by high pressure sodium lamp is the third generation of new type of electric light source, high luminous efficiency, less consumption, long life, strong ability to penetrate the fog and the advantages of no trap, have extremely extensive application in the field of domestic electric light source, including the highway, airport, port, dock, station, square, industrial and mining enterprises, parks and other places lighting. Niobium zirconium alloy and high pressure sodium lamp ceramic components have a similar coefficient of thermal expansion, therefore, by niobium zirconium alloy made of high pressure sodium lamp in the electric light source industry has an irreplaceable position. The niobium zirconium alloy used in traditional high pressure sodium lamp is pipe. With the continuous development and improvement of manufacturing technology, niobium zirconium alloy wire has the potential to replace niobium zirconium alloy pipe by virtue of low price and high subsequent processing efficiency.
The traditional manufacturing methods of niobium and niobium alloy wire are mainly extruded cobilization, rotary forging or fixed die drawing, and vacuum annealing. The traditional manufacturing methods of niobium zirconium wire have the following disadvantages: due to the extrusion cobilization process, the extrusion tail is long, resulting in a low product yield; Niobium zirconium alloy has the characteristics of soft material, high processing heat and poor metal fluidity. If the spinning forging process is adopted after extrusion, due to the restriction of deformation mode, multiple passes of spinning forging will lead to the folding of the blank surface and the formation of surface fine crystal layer after vacuum annealing, which will affect the properties of the wire. If the extrusion process adopts the multi-pass fixed-die drawing process, the surface oxidation pretreatment must be carried out before drawing, and the traditional manufacturing method greatly reduces the production.
