A method and a device for manufacturing semi-hard or soft tantalum wire, comprising a pay-off device, an annealing device and a take-away device; The pay-off device comprises a pay-off wheel and a guide wheel at the entrance of the annealing device, and the take-up device comprises a take-up wheel and a guide wheel at the exit of the annealing device; The annealing device comprises an upper guide box, an incubator box and a lower guide box from top to bottom, and the upper guide box and the lower guide box are provided with an internal duct, and the incubator is provided with a hanging cabinet type heater; The hanging cabinet type heater is composed of a guide post, an upper fixed connecting block, a resistance wire and a lower fixed plate from top to bottom; The invention also discloses a tantalum wire manufacturing method. The tantalum wire is annealed in a heater and at the temperature of 1150-1250 ℃, and the hard tantalum wire can be changed into a semi-hard or soft tantalum wire according to different speed of wire collection; The invention can achieve two goals with one stone and high production efficiency without straightening the tantalum wire after annealing.
Annealing of tantalum wire can eliminate the residual stress and recrystallize to improve the structure. The existing tantalum wire annealing is generally carried out in the vacuum heat treatment furnace, the annealing temperature is basically at 1400-1500℃, and the finished product is straightening by the wire drawing machine after annealing. This method can be used to produce hard tantalum wire, but when producing semi-hard or soft tantalum wire, the annealed tantalum wire is difficult to be straightened again, and the flatness is low. The flatness of tantalum wire refers to the ratio of the distance between the center line of the two ends of the tantalum wire and the tantalum wire length after the 200mm tantalum wire is naturally loosened. The flatness is a dimensionless value, and the smaller the value, the straighter the tantalum wire. The preparation of tantalum wire for capacitor has strict requirements for the flatness of tantalum wire, so it is necessary to find a suitable annealing device and method.
The tantalum wire is threaded, and the tantalum wire is paid off by the pay-off wheel. After winding through the upper guide wheel, the tantalum wire enters the incubator vertically through the inner catheter of the upper guide box. Open the incubator, pass the tantalum wire through the opening on the heat shield, and vertically penetrate the guide post of the hanging cabinet heater; The tantalum wire passes down through the ceiling type heater and out through the opening under the heat shield, and then the tantalum wire is penetrated into the inner catheter in the lower guide box; The tantalum wire is drawn from the lower guide box through the lower guide wheel and then picked up by the take-up wheel.
