JPS5829555A - Production of thin strip of amorphous metal - Google Patents

Abstract

PURPOSE:To prevent the clogging of a nozzle thoroughly by providing a nozzle slit via an intermediate nozzle between the same and a tundish and providing a stopper in the opening part of the intermediate nozzle. CONSTITUTION:A nozzle slit 14 is provided between the same and a tundish 12 via an intermediate nozzle 13, and a stopper 22 is provided in the opening part of the nozzle 13. When the stopper 22 is opened, the molten metal 15 in the tundish 12 is ejected continuously onto the surface of a cooling roll 11 under high speed revolution through the slit 14 via the nozzle 13 and a nozzle tip 16 by the falling impact right after the opening, whereby the molten metal is solidified and an amorphous metal strip 9 is formed. Therefore the clogging of the nozzle is forcibly eliminated. It is preferable to provide a heater in the outside circumferential part of the nozzle 13 and to reinforce the tip 16 constituting the slit 14 with a tip base 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing an amorphous metal ribbon.

The liquid quenching method is known as a method for manufacturing amorphous metal ribbons, but of these methods! It has been announced that it is suitable for the production of centrifugal quenching method, twin roll method and single roll method.

By the way, in the past, the tundish method has been adopted in order to enlarge the hot water storage part and make it possible to process a large amount of water, but if the tundish capacity becomes larger than 11゛, the temperature of the bath molten metal will be kept at an appropriate temperature. It has been experienced that it is difficult to preheat and maintain heat required for tandish. The molten metal cooled easily, and the injection nozzle part in particular was prone to solidification, which caused problems such as nozzle clogging.

On the other hand, if high-temperature bath water is heated due to nozzle clogging, the water becomes amorphous and cannot be controlled to the optimum pouring temperature.

The present invention solves these drawbacks, and its gist is to continuously move molten metal from a nozzle slit to the surface of a cooling body at high speed; An apparatus for obtaining an amorphous metal ribbon by spinning, characterized in that the nozzle slit batten dish is provided with an intermediate nozzle, and a stopper is provided at the opening of the intermediate nozzle. This is a manufacturing equipment for quality metal ribbon.

According to the present invention, a distance is provided between the tundish and the nozzle slit to completely prevent initial clogging of the fine-hole nozzle due to kinetic energy imparted to the molten metal when the stopper is opened.

The present invention will be explained below with reference to the drawings.

In the figure, a tundish 12 is provided with an intermediate nozzle 1; 3, and a nozzle slit 14 is formed at the tip of the nozzle. 10 is a stopper, and 11 is a cooling roll, which rotates at high speed. Molten metal 15 is stored in tundish 12.

FIG. 2 shows another embodiment of the invention, in which the intermediate nozzle 13
A heating element 18 is provided on the outer periphery of the nozzle tip, and the nozzle tip is also preheated at the same time. The nozzle tip 16 is (3) reinforced with a chip stand 17, and the intermediate nozzles of Tanguin-7, :I-1 are installed all at once on the support frame 19. J., 11 Although it should be called a nozzle, the invention may not be applied to the case of a type of nozzle that sprays bath water in the direction of the water chamber. , Fig. 3 jt(so(J,) - Actual M11 example not shown.

In Figure 3, 12C1, container, I n 6゛, -1
Go? 1 hot water, 23 common supply hole, 13 kl two intermediate nozzles,
+ 7 (1,1 chip base, 17a is tapered fitting hole,
l6i1 nozzle chip, 14 and 1 nozzle slit, I.
la Q: l nozzle slit opening, I i, ii cooling roll, 9): l, s i IJ tube. 20
is cylinder <+34, 20 a It: r King'IBM open [-
1, 2'Ot+ & small diameter through hole above the soil, 21 is open 1-■;
li, 2:l11, stuts・etc.

In the apparatus shown in FIG. 13, bath water is charged into a container 1.
2 When the lower stopper 22 is opened, a large kinetic energy i-3 is given to the molten metal 15 due to the static pressure in the lower part of the container, and the molten metal rushes through the internal space of the intermediate nozzle]3 and enters the nozzle slit 14 (/I ) collides with. The water hammer action at this time prevents initial clogging of the nozzle tip l-+7+.

Although s is essential (1 is also a component), it is also possible to provide the cylindrical wall 10 and form a small-diameter through hole on the cylindrical wall 10 to form an air vent.

The present invention consists of the above configuration, but the present invention
When the stopper 10 is opened, the molten metal 15 stored in the tundish 12 is forcibly ejected and supplied from the nozzle slit 14 to the cooling roll 11 via the nozzle tip 16 due to the falling impact immediately after the stopper is opened. As a result, the nozzle clogging phenomenon completely disappears.

According to Te. Kouma, if a conventional crucible with a nozzle cut into the bottom is used, the local preheating of the nozzle tip is insufficient.
Although nozzle clogging was unavoidable, according to the present invention, it is clear that immediately after the stopper is opened, a force several times the static pressure of molten steel acts to forcibly remove the molten steel from clogging the nozzle.

In the present invention, it is also possible to locally preheat the intermediate nozzle by heating the outer periphery of the intermediate nozzle in combination with gas heating or electric heating, for example, to maintain the temperature at a desired temperature. Furthermore, it is effective for preheating if a chip stand] 7 is provided on the support frame 19 in circumscribed relation to the nozzle tip 16, and preferably the chip stand is made of a good thermal conductor.

Next, examples of the present invention are not shown. 3. Intermediate nozzle (BNXA, ]203, (graphite)):
2001am (fI Shitandei Tsunyu total height 500
mm) Noz/L/ 5- Horn-A1203 Also 1f, ”;-
5i3Na or 1f3, BN chip stand, C (graphite), B
In addition to heating with an oxyhydrogen flame, electric heating using the graphite intermediate nozzle itself as a heating element was used for the N-Al←1, A1□03 series intermediate nozzle. As a result, both were able to be preheated to +300°C. 3. By using the chip stand as a good thermal conductor, the nozzle chip uniformly showed a temperature of 1200°C (light high temperature = -1). As a result, there was no nozzle hi1.

,

[Brief explanation of drawings]

FIG. 1 is a front view of the present invention, FIG. 2 is an explanatory diagram of one embodiment of the present invention, and FIG. 3 is a further detailed explanatory diagram of the present invention. IO° Stopper 12: Tanditush 11
Cooling roll 13: Intermediate nozzle 14: Nozzle slit Figure 7 Figure 2

Claims (1)

[Scope of Claims] 1. In an apparatus for obtaining an amorphous metal ribbon by continuously jetting and supplying molten metal from a nozzle slit onto the surface of a cooling body rotating at high speed and rapidly solidifying it, the nozzle slit 1. An apparatus for manufacturing an amorphous metal ribbon, characterized in that the tundish is provided through an intermediate nozzle, and a stopper is provided at the opening of the intermediate nozzle. 2. The amorphous metal ribbon manufacturing apparatus according to claim 1, wherein a heating device is provided on the outer periphery of the intermediate nozzle. 3. The amorphous metal ribbon manufacturing apparatus according to claim 1, wherein the nozzle chip constituting the nozzle slit is reinforced by a chip stand.