The preparation method of zirconium metal fiber is as follows: 1. Prepare zirconium ingot and forge bar blank; Two, the billet is rolled into bars, and the surface oxide is removed by mechanical processing; Three, pull the bar to get the wire; Vacuum annealing treatment after pickling of wire; Five, the wire after vacuum annealing treatment for multiple times of drawing, and then the wire after drawing vacuum annealing; 6. Pickling, pre-film treatment, electroplating, washing and drying the wire after vacuum annealing; 7. Bundle the dried wire into copper tube and compound it on the broach machine to get the composite tube, which is drawn after vacuum annealing treatment; Eight, the composite tube after drawing pickling to remove copper and oxide film, deionized water washing, natural drying, zirconium metal filament. The invention adopts the cluster drawing process to prepare zirconium metal fiber, and the zirconium-copper composite pipe will not break during the cluster drawing process by selecting an appropriate zirconium-copper section ratio.
Zirconium fiber has been commercialized in foreign countries, widely used in aircraft ejection escape system, underwater photography equipment, etc. However, there are no reports about the diameter and production process of zirconium filament. Existing related metal filament, are stainless steel and other metal wire, zirconium filament patent is not seen. A kind of invention patent named "a metal fiber and its preparation process", the license number is ZL200610086041.2, although the single filament can be drawn to 6 μ m, but its main disclosed component is iron. And its smelting process, annealing process, single wire drawing process, electroplating process, cluster drawing process, cleaning process are different from the preparation of zirconium fiber.
The technical problem is to provide a preparation method of zirconium metal filament for the deficiency of the existing technology mentioned above. The method adopts cluster preparation of zirconium metal filaments of drawing process, by choosing appropriate zirconium copper cross section ratio, synchronize the two kinds of material deformation, in the process of cluster drawing zirconium copper pipe won't appear rupture phenomenon, and through the control of process parameters to overcome the zirconium work hardening problems such as serious, easy oxidation, preparation of zirconium metal filaments minimum can be up to 10 microns in diameter.
The invention provides a preparation method for zirconium metal fiber. The pickling solution described in Step 4 is prepared by mixing H20, HF and HNO3 according to the volume ratio of (40 ~ 60): (20 ~ 40): (10 ~ 40). HF and HNO3 are analytical pure reagents, and the pickling temperature is 30°C ~ 60°C, and the time is 1s ~ 60s. The vacuum annealing process described in step 4 has a vacuum degree below 8.0X KT2Pa, a temperature of 600°C to 680°C, and a holding time of 50min to 80min.
