SU1650368A1 - Device for producing metallic powder - Google Patents

Abstract

The invention relates to powder metallurgy for the production of fine metal powders by the method of conductor blasts. The purpose of the invention is to increase the yield of the amorphous powder phase. Capacitor 11 is charged to nominal voltage. The roller device 10 feeds the wire into the spray area. The pump 8 pumps the refrigerant through the channels 6 and 7 of the input and output. Part of the refrigerant through the bottom of the holes of the channel 6 is tangentially injected into the spray zone 9 and forms a spiral flow on the inner surface of the insulator 5, and the other part coming through the top of the holes of the channels into the cavity between the insulator 5 and the upper electrode cools the latter and enters channel 7. The feed wire touches the lower electrode 3. The capacitor 11 at this moment is discharged, the conductor evaporates in the process of explosive boiling. The particles of the products of electrical explosion of the conductor fall into the vortex flow of the refrigerant, condense and, quickly cooled, collect in the receiver. 1 il.

Description

The invention relates to powder metallurgy, in particular to a device for producing fine metal powders by the method of electric explosion of conductors, and can be used in the metallurgy of ferrous and non-ferrous metals.

The purpose of the invention is to increase the yield of the amorphous phase of the powder.

The drawing shows a device, a General view in section.

The device comprises a spray chamber 1, upper 2 and lower 3 electrodes, a contact disk 4, an insulator 5 with a longitudinal through channel 6 with inlet openings and an output channel 7, a peristaltic pump 8 for supplying refrigerant to the spray zone 9, feed rollers 10, a condenser 11.

The device operates as follows.

The capacitor 11 is charged to the rated voltage. The roller device 10 feeds the wire into the spray zone. The peristaltic pump 8 pumps the refrigerant through the channels 6 and 7 of the input and output. Part of the refrigerant through the lower of the holes is tangentially injected into the spray zone 9 and forms a spiral flow on the inner surface of the insulator 5, and the other part, flowing through the upper from the holes into the cavity between the insulator 5 and the upper electrode, cools the electrode and enters the output channel 7. The wire feed touches the lower electrode 3. which causes the switching device to trip. The capacitor 11 is discharged, the conductor, heated by a powerful current pulse, evaporates in the process of explosive boiling. Particles of the products of an electric explosion of a conductor enter a vortex coolant stream, where they condense and then quickly cool. The resulting paste is collected in a receiver (not shown). Then it can be dried or prepared for slip casting. Due to the high cooling rate of metal particles (about 10 ⁵ K / s), a high percentage of the amorphous phase content in the powder is achieved.

Claims (1)

Claim 20 A device for producing a metal powder containing a spray chamber, electrodes, feed rollers, a capacitor, characterized in that. In order to increase the yield of the amorphous phase 25 of the powder, the lower electrode is made in the form of a sleeve connected by a thread to the contact disk, and the spraying chamber is lined with an insulator, and a channel for supplying liquid refrigerant to the atomization zone and for cooling the electrodes is made inside the insulator. Compiled by V. Panfilenko Editor V. Danco Tehred M. Morgenthal Corrector S. Cherni Order 1570 Circulation 500 Subscription VNIIIPI State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow. J-35. Raushskaya nab., 4/5 Production and Publishing Combine Patent, Uzhhorod, 101 Gagarin St.