JPS6025216B2 - Nozzle for manufacturing amorphous alloy thin wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nozzle for producing fine amorphous alloy wire, and more particularly to the nozzle used for producing amorphous alloy pongee wire by jetting and quenching port-scarred alloy.

When an alloy of a specific composition is cooled extremely rapidly from a molten state, a so-called amorphous alloy having an atomic arrangement similar to that of a liquid can be obtained, and its use in various fields has attracted particular attention in recent years.

A common method for producing such amorphous alloys is, for example, to ultra-quench the alloy by directly injecting it onto a cooling body such as a rotating roll (at a cooling rate of about 100 ml).

0/sec), and the shape of the amorphous alloy obtained by this method depends on the hole diameter of the nozzle through which the molten metal is jetted.

That is, the molten metal ejected from the nozzle is rapidly cooled on the rotating roll surface and formed into a ribbon shape by continuous casting, and it is known that the width of the ribbon corresponds to the diameter of the ejection hole of the nozzle. Depending on the application, the shape of the amorphous alloy often needs to be a thin wire with a ribbon width of 150 mm or less, and the diameter of the ejection hole of the nozzle used in this case must be 150 mm or less. Must be.

However, it is not easy to select an appropriate material for forming such a small diameter nozzle outlet, and currently, quartz glass is mainly used.

It is possible to form ejection holes of any size in quartz glass by plastic processing, but when processing it into a so-called multi-hole nozzle in which multiple ejection holes are provided in the same nozzle, it is necessary to plastically process each hole into the same shape. is almost impossible. For this reason, when quartz glass is used as the material, the nozzle structure is limited to a single hole, and the mass productivity of amorphous alloy thin wires is significantly reduced. Moreover, quartz glass easily reacts with phosphorus.
Therefore, if the composition of the melt alloy contains phosphorus, reaction products are formed on the surface of the quartz glass nozzle due to the reaction between quartz and phosphorus, and the stress generated at this time is known to damage the nozzle. . Therefore, quartz glass is not a suitable material for a nozzle for manufacturing an amorphous alloy mesh wire in terms of mass productivity and safety. For this reason, ceramic materials that have little reactivity with phosphorus, such as zirconia (Z 2)
, magnesia (Mg○), alumina (N203), and boron nitride may be used in place of silica glass, but these ceramics have extremely high hardness, so even with current technologies such as ultrasonic processing, they cannot be used as they are. Diameter 3
It is extremely difficult to process an ejection hole with a diameter of 0.00 Buddha or less.

It is an object of the present invention to overcome the drawbacks of the prior art and to provide a ceramic nozzle with excellent workability and safety that is suitable for manufacturing extremely small width amorphous alloy pongee wire.

The present invention provides a nozzle for manufacturing an amorphous alloy fine wire for forming a pongee wire of an amorphous alloy with a predetermined line width by jetting and rapidly cooling a melt-scarred alloy, wherein the nozzle is made of a ceramic material, and the nozzle is made of a ceramic material. It is characterized by comprising a closing part provided on the end face, and an ejection hole having a hole diameter corresponding to the predetermined line width formed by adhering and bonding a ceramic material to the mouth edge of the closing part. .

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 4 show the steps of a method for manufacturing a nozzle for manufacturing a thin amorphous alloy wire according to an embodiment of the present invention.

On the end face of the nozzle body 1 made of a ceramic material (alumina), a gateway A having a diameter of about 300 mm is first formed by ultrasonic processing, as shown in cross section in FIG.

Next, as shown in FIG. 2, a graphite core material 2 with a diameter of about 150 mounds corresponding to the ribbon width of the amorphous alloy manufactured is placed in the opening A of the end face of the nozzle body, leaving a gap B. will be inserted. In this state, a ceramic material (alumina mixed with cement) is adhered and bonded to the end surface of the nozzle body 1 including the gap B between the opening A and the core material 2 by thermal spraying, as shown in FIG. 3. A ceramic adhesive bonding layer 3 is formed. Here, when the core material 2 is removed by incineration at high temperature, the hole corresponding to the diameter of the core material is approximately 15 mm, as shown in FIG.
A nozzle 1 having a jet hole C of 0 mm on the end face is obtained.
Figures 4 and 5 are micrographs (magnification x 100) showing the enlarged nozzle end face during the manufacturing process of the nozzle, and Figure 5 shows a sekiguchi section with a diameter of about 300 mounds formed by ultrasonic processing on the ceramic nozzle end face. The state in which is formed,
Further, FIG. 6 shows a state in which an ejection hole having a diameter of approximately 150 mm is formed in the opening □ of this end face by thermal spraying of ceramic.

Thus, according to the embodiment of the present invention, since the nozzle is formed from a ceramic material (alumina) that does not react with phosphorus, the use of an amorphous alloy thin wire made from a molten alloy containing phosphorus in its composition is possible. Even when used for quartz glass nozzles, almost no damage occurs due to reaction with phosphorus, as occurs with quartz glass nozzles.

For example, using the nozzle of this example and a secondary nozzle made of quartz glass, Fe75Cr6P88C8 (atomic ratio)
When molten metal was jetted for 10 seconds each at a temperature of 130 to 0, the secondary quartz glass nozzle was damaged after just one jet, but the ceramic nozzle of this example was jetted 10 times. No damage was observed in the above eruptions. Also,
The nozzle according to the embodiment of the present invention is formed by ultrasonically machining the entrance part A of about 300 mm on the end face of the ceramic, and then thermally spraying it with ceramic, leaving the area of the ejection hole C in the closed part. It is now possible to arbitrarily form a pongee hole of about 150 mm, which was practically impossible in the past, and it is now possible to use ceramic as a nozzle material for manufacturing amorphous alloy thin wire with a ribbon width of 150 mm or less. Become.

Furthermore, in this embodiment, when forming the ejection hole C in the entrance part A, a core material 2 having a diameter corresponding to the hole diameter of the ejection hole is inserted into the opening A, and after welding the ceramic bonding layer 3, the core material 2 is inserted into the opening A. Since the core material 2 is incinerated, by appropriately setting the diameter of the core material 2, it is easy to create an ejection hole in the nozzle end face with dimensions corresponding to the desired ribbon width of the amorphous alloy pongee wire. can be formed into

Furthermore, as is clear from the above processing method, it is easy to form a large number of such ejection holes C on the same nozzle end face, and mass productivity can be improved by using a multi-hole nozzle structure.

In this example, alumina (
Although zirconia (Zr02), magnesia (M90), and boron nitride (BN) were used instead, similar effects in terms of life, workability, etc. were obtained.

As described above, according to the present invention, the safety and workability of a nozzle for manufacturing an amorphous alloy cord wire can be significantly improved.

[Brief explanation of the drawing]

FIGS. 1 to 4 are diagrams showing each step of manufacturing a nozzle according to an embodiment of the present invention, and FIGS. 5 and 6 are microscopic photographs showing an enlarged state of the end face of the nozzle. 1... Nozzle, 2... Core material, 3...
...Ceramic adhesion bonding layer, A...Sekiguchi part, B.
...Gap, C...Blowout hole. Festival l Figure 2 Figure 3 Figure 4 Nada bonito, Isowashi bonito snow

Claims (1)

[Claims] 1. In a nozzle for manufacturing amorphous alloy thin wire for forming a thin amorphous alloy wire with a predetermined line width by jetting and rapidly cooling a molten alloy, the nozzle is made of a ceramic material and is provided on the end face of the nozzle. An amorphous alloy thin wire comprising an opening and an ejection hole having a diameter corresponding to the predetermined line width and formed by adhering and bonding a ceramic material to the edge of the opening. Nozzle for manufacturing.