SU1271659A1 - Apparatus for producing metal fibres - Google Patents

Abstract

The invention relates to the field of powder metallurgy, in particular, to devices for producing metallic fibers from a melt. The device contains a melt receiver 1 with curvilinear channels 2 on the surface, mounted on a shaft 3 with a 4-rotation drive, a mold 5 with acny aff / e / ff / i / iJ

Description

internal working surface, coolant 6, cylinder 7 with holes in the walls and external corrugated surface 8 in the form of a truncated cone, which passes into a cylindrical surface with bottom 9 and holes 10. The crystallizer 5 has a rotation drive 11 and is cooled by a gas flow supplied pipe 12 and flowing out of the slot 13. The aim of the invention is to improve the quality of the metal fibers. Electric motors with a magnetic core of the material obtained in this installation have a 0.3% increased efficiency. 1 il.

The invention relates to powder metallurgy, in particular, installations for the production of metal fibers from a melt.

The purpose of the invention is to improve the quality of products,

The drawing shows a device for producing metallic fibers, axonometrics.

The device contains a melt receiver 1 with curvilinear channels 2, mounted on a shaft 3 with a 4 rotation drive, a mold 5 with an inner working surface, a cooling cylinder 6j with openings in the walls and an outer corrugated surface 8 in the shape of a truncated cone, which goes into 1DILIPDR with the bottom 9 and the holes 10, the crystallizer 5 has a rotational drive 11 and is cooled by a gas flow supplied by the nozzle 12 and exhausted from the slot 13.

The device works as follows.

A 1. melt receiver communicates a retractable two-way through the shaft 3 by an actuator 4. The crystallizer drives actuator 11. A stream of molten metal flowing from a smelting furnace enters the explorer 1. From the top of the receiver the melt spreads over the entire surface 5 filled in curvilinear channels 2, They do not allow metal to be near the top of the receiver. Under the action of centrifugal forces, the liquid metal in the form of droplets detached from the receiver in the region of its base, falls on the working surface of the crystal for torus 5, the cooling of which occurs as follows. Under the influence

The centrifugal force of the cooling fluid acts with a max. force on the external wall 8 of the mold in the zone of its base. Under the action of centrifugal and capillary forces, the liquid penetrates into the gap between the working surface of the mold 5 and cylinder 7 and begins to rise, washing the inside of the working surface of the mold 5. When the latter is heated to high. temperature the liquid in the gap boils, as a result, a cacho vapor is formed. The effect of gravity and centrifugal forces exerts itself: there is little effect on his behavior. He fills the entire inner cavity of the crystallizer. Since the surface 8 is cooled by a stream of gas (air), then drops of liquid are condensed on it, t; o, by the action of centrifugal forces and the geometry of wall 8, it enters the base zone of the outside surface of the cristae. cycle. This ensures a stable and intensive process of cooling, kden.and the working surface of the mold.

  The direction of rotation is 1: the installer and the receiver are the same. Having broken off the T1Eemnika drop of W11; (., Whom the metal tangentially leaks the working surface of the crystal1 has slowed down 5, where there is a mold forming 14.1.1 fact fibers; 14, .. Tinplate last settles va dks 9. and centrifugal slings remove tpg through hole 10,

. Execution of the mold in the form of a truncated cone with an internal cylindrical working surface and a system of coolants.} In: day;

the principle of thermosyphon allows stationary use of the proposed device and obtaining fiber of identical properties during its operation. Maintaining the same direction of rotation of the receiver and the crystallizer allows smooth interaction of metal droplets with the working surface, which eliminates their additional crushing, and therefore decreases the percentage content of total non-fibrous inclusions in finished products.

The device makes it possible to produce metallic fibers with a length of 9-12 mm and a diameter (120-160) with a capacity of up to 675 kg / h. The content of total non-fibrous inclusions in the finished product is 15.7%, while with the operation of an izvesgnogo device, the productivity reaches 450 kg / h, the fiber length is 2-7 mm, the fiber diameter is (170-230) 40 mm with the content of total non-fibrous inclusions up to 21, eight%,

Electric motors with a magnetic core of the material obtained on the proposed device have 0.3% higher efficiency than motors with a magnetic core made of a material obtained on a known device.

Claims (1)

Formula invented, shadow An apparatus for producing metallic fibers comprising a rotary-driven crystallizer and a system for supplying molten metal to the crystallizer, characterized in that, in order to improve product quality, it is equipped with a conical melt-mounted receiver with curvilinear parallel channels made in the form of a multiple-wave rotary actuator mounted on a shaft threads starting at the apex and ending at the base of the cone, while the direction of rotation of the melt receiver coincides with the direction of rotation of the coaxially placed with the mold, the inner surface of which is cylindrical, and externally cooled by high-speed gas flow, is a corrugated surface in the form of a truncated cone, passing at the base into a cylindrical, displaced lateral from: versti, and fluid and in it there is a cylinder with holes in the walls, oriented concentrically with the working surface of the mold.