JPH01178303A - Device for manufacturing continued thin sheet - Google Patents

Abstract

PURPOSE:To improve type quality and production efficiency of a thin sheet by installing a metal slurry manufacturing device breaking dendrite structures in a molten metal at the inlet side of a continuous casting machine and successively installing a rolling mill and a winder for a slab in the outlet side of the casting machine. CONSTITUTION:A metal slurry manufacturing device 1 provided with a stirrer 20 is installed in the upsteam side of a continuous casting machine 26 of twin rolls type, etc., and a rolling mill 33 and a winder 35 for a cast slab 27 are successively installed in the downstream side of the casting machine 26. A molten metal 25 is fed into the manufacturing device 1 from a ladle 2 and the stirrer 20 is rotated with the stirrer 20 and refractory materials 5, 12 heated. In that time, growing dendrite structures are broken by actions of agitation shearing force of the stirrer 20 to form uniform semisolid metal slurry. Thus, a thin sheet is continuously manufactured from a metal slurry by use of the rolling mill 33 and winder 35. Therefore, the quality and production efficiency of the thin sheet are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to continuous thin plate production equipment that is capable of continuously producing thin plates from semi-solid metal slurry.

[Prior Art] Various devices have been proposed in recent years for continuously manufacturing thin plates by cooling and solidifying molten metal (for example, Japanese Patent Publication No. 60-249
Publication No. 29).

On the other hand, in order to enable highly homogeneous deformation processing, mechanical rotational stirring is applied to the alloy material in a solid-liquid coexistence state to destroy the dendrite morphology and create a large amount of fine spherical crystal grains in the molten metal. Various studies have been made to create a semi-solid metal slurry in which solid metal is present and to produce solid metal from the metal slurry.

[Problems to be Solved by the Invention] However, the 13 facilities proposed so far are facilities for continuously manufacturing thin plates from molten metal, and they have had various problems.

The present invention has been made in view of the above-mentioned circumstances and has an object to provide equipment that can continuously manufacture thin plates from semi-solid metal slurry.

[Means for Solving the Problems] The present invention provides a heating device and a cooling device for heating and cooling molten metal, and a metal slurry that destroys the dendrite form formed in the molten metal to form a semi-solid metal slurry. a manufacturing device, a continuous casting machine that heats or cools the semi-solid metal slurry supplied from the metal slurry manufacturing device and draws it as a slab; a rolling device that rolls the slab cast by the continuous casting machine; It is equipped with a winder that winds up the plate rolled by the rolling machine.

[Function] The semi-solid metal slurry produced by the metal slurry production device is supplied to a continuous caster and heated or cooled to form a slab, which is pulled out from the continuous caster and then rolled. It becomes a plate with a predetermined width and thickness, and is wound up by a winding machine.

[Example〕 An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of continuous thin plate manufacturing equipment of the present invention,
In the figure, 1 is a stirrer (stirring bar) that controls the temperature of the molten metal supplied from the ladle 2 through the molten metal supply pipe 3.
This is a metal slurry production device that rotates the metal slurry to produce semi-solid metal slurry.

Details of the metal slurry manufacturing apparatus 1 are shown in FIGS. 2 to 4. That is, a hollow cylindrical container 6 whose exterior is covered with an iron skin 4 and a refractory material 5 is provided inside is attached to a casing 7, and at the same time, a molten metal is supplied into the container 6 from the outside to the upper side of the container 6. The metal supply pipe 3 is fixed and the container 6
A heat medium supply pipe 9 for circulating a heat medium for heating the molten metal and a cooling medium supply pipe 10 for circulating a cooling medium for cooling the molten metal are disposed between the iron skin 4 and the refractory material 5.

A container 13 for discharging semi-solid metal slurry consisting of an iron skin 11 and a refractory material 12 is attached to the lower part of the container 6, and a heat medium for heating the semi-solid metal slurry is circulated between the iron skin 11 and the refractory material 12. A heat medium supply pipe 14 is provided.

The horizontal cross-sectional shape of the upper hollow part of the container 13 is circular as shown in FIG. 3, and its diameter is smaller than the diameter of the lower end of the hollow part of the container 6.

Further, both sides of the container 13 gradually become flat from the top to the bottom and widen in the horizontal direction, and the horizontal cross-sectional shape of the lower end outlet 15 is rectangular as shown in FIG.

Another casing 1B is installed on the upper part of the casing 7, and a vertical shaft 18 that can be rotated by a drive device is fitted and supported by a bearing 1γ attached to the casing 16, and a lower end flange portion of the vertical shaft 18 is fitted. A vertical fluid pressure cylinder 19 is disposed in the vertical shaft 18a, and a stirrer 20 made of ceramic, for example, is disposed at the lower end of the vertical shaft 18, and the lower end of the piston rod 19a of the fluid pressure cylinder 19 is connected to the upper end flange portion 20a of the vertical shaft 18. A key 21 is interposed between the flanges 18a and 20a so as to be engaged with the shaft 18 and to enable transmission of power from the vertical shaft 18 to the stirrer 20.

The molten metal stirring section of the stirrer 20 has a polygonal or cylindrical cross-sectional shape, and a spiral iron piece 22, for example, which generates an induced current as a heating means is embedded inside the molten metal stirring section of the stirrer 20. Ceramic guide member 2 with a smaller diameter and located inside the container 13
3 is integrally fixed to the lower end of the stirrer 20, and a spiral guide groove 23a is carved on the outer periphery of the guide member 23.

In addition, in FIG. 2, 24 is a gas exhaust pipe provided in the casing 1B, and 25 is a molten metal.

As shown in FIG. 1, below the metal slurry manufacturing apparatus 1, there is a twin-roll continuous casting system having two cooling rolls 28a arranged horizontally and in parallel, and a pool 26b formed on the cooling rolls 28a. A machine 26 is installed. Cooling roll 28a
The axial direction of is the lower end outlet 2 of the metal slurry manufacturing apparatus 1.
It extends in the long plane direction of 5.

A guide roll group 28 is disposed below the twin-roll continuous caster 26 to transport the slab 27 descending vertically in the horizontal direction.
, an edge heater 30, a rolling device 33 including a plurality of edgers 31 and a horizontal rolling mill 32, a pinch roll 34, and a winder 35 are sequentially arranged from upstream to downstream.

When manufacturing a thin plate from a semi-solid slurry, the slurry 2 is
0 is lowered, and the lower end of the slurry 20 and the refractory material 1 of the container 13 are
2, the vertical shaft 18 is driven to rotate the slurry 20, the gas in the container B is sucked and exhausted through the tube 24, and the iron piece 22 is energized to generate an induced current. The heating medium is generated and circulated through the heating medium supply pipe 9.14.

For this reason, the slurry 20 is caused by the induced current and the container 6,
The heat-resistant material 5.13 and the wall surface of 12 are respectively heated to a desired temperature by a heat medium.

When the slurry 20 and the refractory material 5.12 are heated to a predetermined temperature, the molten metal is fed from the ladle 2 to the container 6 via the molten metal supply pipe 3.
molten metal 25 is supplied into the heat medium supply pipe 9 as necessary.
A heating medium is supplied to the cooling medium supply pipe IO, and a cooling medium is supplied to the cooling medium supply pipe lO, and heating of the slurry 20 by the induced current is continued or stopped, and the molten metal is stirred and sheared by the slurry 20 while controlling the temperature of the molten metal. A force is applied to crush the growing dendrite crystal structure to mix uniform fine spherical crystal grains in the molten metal, producing a semi-solid metal slurry. Even when the supply of molten metal is started, the slurry 20 and the refractory material 5 are heated to a predetermined temperature, so the molten metal is not cooled by the slurry 20 and the refractory material 5, and therefore the generation of solidified shells can be prevented.

When a predetermined semi-solid metal slurry is formed, the slurry 20 is raised by the fluid pressure cylinder 19, and the slurry 20
A gap of approximately X is formed between the lower end and the upper surface of the refractory material 12 of the container 13, and the semi-solid metal slurry is transferred from the container 6 to
The molten metal is supplied to the sump 2Bb of the twin roll continuous caster 26 through the lower end outlet 15 of 3.

At this time, since the semi-solid metal slurry is guided along the guide groove 23a of the rotating guide member 23 and discharged,
The semi-solid metal slurry is smoothly discharged into the container 13. In addition, since the semi-solid metal slurry spreads uniformly in the longitudinal direction within the container 13, it is supplied to the twin-roll continuous caster 26 in a rectangular cross-sectional state extending in the axial direction of the cooling roll 26a.

The semi-solid metal slurry supplied to the sump 28b of the twin-roll continuous caster 26 is cooled by contacting the cooling roll 26a rotating in the direction of the arrow, producing a solidified shell, and the grown solidified shell is cast. Cooling rolls 26a, 26a as pieces 27
It is pulled out from between the holes, guided by the guide rail group 28, passes through the crop shear 29, and the tip crop is cut off.
The edge portion is heated by the edge heater 30 and the rolling device 33
It is sent to the factory and rolled into a thin plate to a specified width and thickness.
It is wound up onto a winding machine 35.

By casting the slab 27 from the semi-solid metal slurry as described above, a high-quality thin plate can be manufactured efficiently.

In addition, in the embodiment of the present invention, the case where a twin roll type continuous casting machine is used as the continuous casting machine has been explained, but it is also possible to use a continuous casting machine such as a caterpillar type or a belt type.
It goes without saying that various other changes may be made without departing from the gist of the present invention.

[Effects of the Invention] According to the continuous thin plate manufacturing equipment of the present invention, thin plates can be continuously obtained from a semi-solid metal slurry, and therefore products of good quality can be efficiently produced, which is an excellent effect.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of one embodiment of the continuous thin plate production equipment of the present invention, Fig. 2 is a detailed diagram of the metal slurry production equipment of the equipment shown in Fig. 1, and Fig. 3 is a diagram of ■-■ in Fig. 2. 4 is a view taken along the line IV-IV in FIG. 2. In the figure, 1 is a metal slurry manufacturing device, 6 and 13 are containers, and 20
25 is a slurry, 25 is a molten metal, 26 is a twin roll continuous caster, 26a is a cooling roll, 26b is a sump, 33 is a rolling device, and 35 is a winder. Figure 2

Claims (1)

[Claims] 1) A heating device and a cooling device that heat and cool molten metal, a metal slurry manufacturing device that destroys the dendrite form formed in the molten metal and forms a semi-solid metal slurry, and a metal slurry manufacturing device that is supplied from the metal slurry manufacturing device. A continuous casting machine that heats or cools semi-solid metal slurry and draws it as a slab, a rolling device that rolls the slab cast by the continuous casting machine, and a winder that winds up the plate rolled by the rolling device. Continuous thin plate manufacturing equipment characterized by being equipped with a machine.