In the metal capillary manufacturing industry, in the manufacture of ultra-thin-wall tantalum capillary tubes, due to the lack of mastering the annealing process, the lack of mastering the drawing process of the pipe, and the lack of precision drawing machines, it is impossible to manufacture a capillary tube with an outer diameter of more than 6mm and a wall thickness of less than 0.03mm. In order to solve the shortcomings of the above technology, a manufacturing process of ultra-thin-wall tantalum capillary is proposed, which can produce qualified ultra-thin-wall capillary.
The manufacturing process of ultra-thin-wall tantalum capillary tube, the selection of metal material tantalum, the following processes are used:
1, the annealing process, according to the different diameter and wall thickness of the annealing temperature is mastered in 800-1200 degrees, the holding time is between 5-15 minutes, the temperature difference in the effective temperature zone of annealing is not more than 10 degrees, the vacuum level of annealing should be more than 10-4, vacuum natural cooling;
2, drawing process requirements, the wall thickness of less than 0.1mm manufacturing process, a single extension rate is not more than 10%, cycle total extension accumulation is not more than 20%;
3, special drawing equipment, the use of non-vibration spiral hydraulic pipe stretching machine, reduce the problem of rupture during the drawing process.
The invention has the advantages that, after processing by the above-mentioned process, several key technologies can be broken through to manufacture ultra-thin-wall tantalum capillary tubes below 0.03mm.
