JPS5832550A - Metal ribbon manufacturing equipment - Google Patents

Abstract

PURPOSE:To make treatment in a compact atmosphere chamber possible and economical in a device for producing a thin metallic strip by a liquid quick cooling method by disposing only the rotary cooling body in a vacuum or gaseous atmosphere chamber. CONSTITUTION:The inside of an atmosphere chamber 12 is evacuated with a pump and is kept in a prescribed vacuum. The degree of vacuum is adjusted by using a leak valve 21. A cylinder 17 is driven to move a nozzle tube 15 upward, and electricity is conducted to a heating coil 4 to melt the thin metallic strip material in the tube 5. When the material melts, a rotary cooling body 11 is rotated at a high speed, and the cylinder 17 is driven to move the tube 15 downward, thereby bringing a nozzle 15a closely over the cooling body 11. At this same instant, an inert gas is introduced through an introduction pipe 18 into the tube 15 to eject the molten metal through a nozzle port 15a to the outside circumferential surface of the body 11, whereby a continuous thin metallic strip is obtained. Thus the compact atmosphere chamber is simply required, and part of conventional devices can be used as they are.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing amorphous metal or crystalline metal ribbon (hereinafter referred to as metal ribbon) by a t-liquid quenching method.

As one of the methods for producing metal ribbons, molten gold (hereinafter referred to as molten metal) is injected from the nozzle opening of a nozzle pipe toward the outer circumferential surface of a rotating cooling body that rotates at high speed. A method of rapid cooling solidification in the form of a tube or tape is known, and this method is called a liquid quenching method. Liquid quenching methods include single roll method, double-coal method, and centrifugal quenching method, depending on the type of rotating cooling body.

Metal ribbons can be obtained by these methods by appropriately selecting the components, composition, cooling conditions, etc. of the molten metal.

By the way, the production of metal ribbons by the liquid quenching method is generally carried out in the atmosphere. However, when metal ribbons are manufactured in the atmosphere, a surface layer of air is generated on the outer circumferential surface of the rotary cooling body due to high-speed rotation, so this airflow is injected onto the rotary cooling body and onto this layer. Molten metal pool C Tsukudol)
7, which was caught between the
The surface roughness of the surface in contact with the rotary cooling body of the metal thin strip manufactured in order to disturb the stability of the metal ribbon is in poor condition.
For this reason, there is a drawback that the thickness of the metal ribbon becomes non-uniform and the edges become irregular. In addition, in the case of single roll or centrifugal quenching method,
Lines containing air bubbles are formed in the longitudinal direction on the free surface of the metal ribbon, and depending on the components and composition of the molten metal, some pieces may break easily. Furthermore, since the nozzle opening of the nozzle pipe is exposed to the atmosphere, it is not possible to prevent the oxidation of the molten metal from the nozzle opening, and as a result, oxides may become clogged and adhere to the nozzle, resulting in a high-quality product. This makes it difficult to obtain C from a continuous metal ribbon. In addition, since it is in direct contact with the rotary cooling body TE, it is easily exposed to oxidation and deterioration due to the instantaneous high temperature.

For this reason, recently, the nozzle tube of metal ribbon manufacturing equipment using the liquid quenching method is placed in a protective gas atmosphere, and the entire equipment is placed in a vacuum, thereby eliminating the various harmful effects caused by air. That is what is being attempted.

FIG. 1 shows the main parts of a typical conventional apparatus for producing a metal ribbon by the single roll method, in which a nozzle tube is provided in a protective gas atmosphere. An inert retaining gas 3t is supplied between the nozzle pipe 1 and the outer pipe 2 surrounding this pipe, and this retaining gas is injected into the rotary cooling body 4 at the same time as the bath water 5f. This prevents oxidation of the molten metal 5 and oxidation of the metal ribbon 6. However, in the above method,
It is not possible to completely prevent the infiltration of the air flow layer caused by the high-speed rotation of the rotary cooling body 4, and the thin metal strip pulled out from the paddle remains at a high temperature even after passing through the protective gas atmosphere. In particular, in iron-based crystalline ribbons), oxidation progresses and a sufficient antioxidant effect cannot be obtained. Therefore, when a large amount of inert retaining gas is flowed in order to further improve the oxidation prevention effect, the metal ribbon becomes unstable due to the influence of this strong gas flow, making it difficult to obtain metal thin strips with good dimensional accuracy. It also had the disadvantage of becoming. Therefore, in order to completely prevent oxidation of the molten metal and prevent oxidative deterioration of the rotary cooling body, it is most effective to place the entire apparatus in a vacuum or in an inert gas atmosphere.

In view of this point, FIG. 2 shows a typical example of a conventional device under vacuum of this type. That is, this device has a nozzle pipe 1, a rotary cooling body 4, a heating coil 8 provided on the outer periphery of the nozzle pipe 1, and a coaxial electrode 9 arranged in a vacuum chamber 7, and in this way, the current and the entire device are In addition to being large in scale, it also requires an electrically insulating section 10, making the closing device expensive. Also, from the viewpoint of workability, it is inconvenient to attach the nozzle pipe within the vacuum vessel 7.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional type. Only the rotary cooling body is placed in a vacuum or inert gas atmosphere chamber, and the heating coil is placed outside the atmosphere chamber. , the vacuum volume is small, high vacuum can be obtained in a short time, and conventional equipment can be easily repurposed, making it an economical, easy-to-handle, and inexpensive manufacturing equipment for metal thin strips. is intended to provide.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 3, reference numeral 11 denotes a rotary cooling body that rotates at high speed and is placed in a vacuum or inert gas atmosphere chamber 12.
The rotating shaft 11a of this rotary cooling body 110 is sealed with magnetic fluid. Reference numeral 13 denotes an outer tube that stands upright with one end protruding into the atmosphere chamber 12, and is made of a fire-resistant ceramic or transparent quartz tube.

Reference numeral 14 denotes a heating coil arranged in a coil shape around the outer circumference of the outer tube 13, and is provided outside the atmosphere chamber 12. 15 is a nozzle pipe inserted into the outer tube 13, and 15m is a nozzle opening. Reference numeral 16 denotes a holder attached to the upper end of this nozzle pipe 15, and this holder 16 also serves as a connection between a cylinder 17 for raising and lowering the nozzle pipe 15 and an inert gas introduction pipe 18 for injecting molten metal. There is. Reference numeral 19 denotes an airtight holder that vacuum-seals the upper end of the outer tube 13 and the middle of the nozzle tube 15. An enlarged view of this airtight holder 19 is shown in FIG. The outer tube 13 is sealed by a backing 19m, and the nozzle pipe 1.5 is sealed by an O-ring 19b so as to be movable up and down. 20 is an airtight holder 19
20 & is a support part for the cylinder 17, 21 is a leak valve that adjusts the degree of vacuum in the atmosphere chamber 12, 2
Reference numeral 2 denotes an exhaust port.Next, a method for manufacturing a metal ribbon will be explained. First, a metal ribbon material is accommodated in the nozzle pipe 15.

After that, the airtight holder 19 and the outer tube 13t are sealed.
Insert the nozzle pipe 15 into the outer pipe 13. At this time, the nozzle opening tSa is made to slightly protrude from the lower end opening of the outer tube 13. Next, the OIJ ring 19b of the airtight holder 19 is sealed to the nozzle pipe 15, and then the outer pipe 13t and the heating coil 1 are sealed.
4, and is installed and sealed in the insertion hole 12 & of the lower end VLt atmosphere chamber 12 of the outer tube 130. Subsequently, the airtight holder 19 is supported on the pillar 20, and the upper metal holder 16 of the nozzle pipe 15 is
Connect the seal to the Thereafter, the cylinder 17 is driven to lower the nozzle pipe 1st, and the distance between the nozzle opening 15a and the rotary cooling body 11 is determined appropriately. Appropriately, this distance is 2- or less. In this way, the inside of the atmosphere chamber 12 is pumped by the rotary pump (
(not shown) and maintain a predetermined vacuum. Adjust the degree of vacuum using the IJ valve 21? Introduce a 4-character gas. Next, the cylinder 17 is driven again to move up the nozzle pipe 15, and then the heating coil 14t is energized to melt the metal ribbon material in the nozzle pipe 15. Note that by using a transparent quartz tube for the outer tube 13, there is an advantage that the molten state of the material can be monitored and measured using a radiation thermometer or the like. After the material is melted, the rotary cooling body 11 is rotated at high speed, the cylinder 17 is driven, and the material is lowered into the nozzle pipe 151.
The nozzle opening 15 & is placed close to the rotating cooling body 11. At the same time, an inert gas is introduced into the nozzle pipe 15 through the introduction pipe 18, and bath water is injected onto the outer peripheral surface of the rotary cooling body 11 from the nozzle port 15a. This makes it possible to obtain multiple continuous metal ribbons.

In addition, in this invention, although the one roll type was described, it can also be used for devices used in liquid quenching methods such as twin rolls and centrifugal quenching methods.

As described above, according to the present invention, by arranging only the rotary cooling body in the vacuum or inert gas atmosphere chamber, a compact atmosphere chamber can be used.

The exhaust pump is also small and economical. Also, some of the conventional equipment can be reused as is. Furthermore, since the nozzle pipe portion heated by the heating coil is separate from the atmosphere chamber, the molten state of the material can be easily monitored. Furthermore, since the metal ribbon can be manufactured in a vacuum or in an inert gas atmosphere, the surface of the metal ribbon is good, and it is possible to manufacture high-quality products with good dimensional accuracy.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the main parts of a conventional apparatus for producing metal ribbon in the atmosphere, Fig. 2 is a side sectional view of the entire conventional apparatus in vacuum, and Fig. 3 is a diagram showing the main parts of a conventional apparatus for producing metal ribbon in the atmosphere. FIG. 4 is a side sectional view of the entire manufacturing apparatus, and FIG. 4 is an enlarged sectional view of the airtight holder. 11... Rotating cooling body, 12... Atmosphere chamber, 13...
・Outer tube, 14... Heating coil, 15... Nozzle pipe,
15a--Nozzle opening, 16... Holder, 17...
Cylinder, 18...Introduction pipe, 19...Airtight holder, 20...Strut, 21...Leak valve. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Figure 1 Cause 2 Figure 3

Claims (1)

[Scope of Claims] (1.) A metal ribbon manufacturing apparatus in which molten metal maple is injected through a nozzle toward a rotating cooling body rotating at high speed, and the molten metal is rapidly cooled and solidified. The cooling body is installed in a vacuum or inert gas atmosphere chamber, and one end of the outer tube is inserted into this atmosphere chamber, and a heating coil is arranged around the outer tube, and a nozzle is installed inside the bracket O71D heating coil. A metal ribbon manufacturing apparatus characterized in that the tube is fully sealed and the nozzle opening of the nozzle tube is attached to the rotary cooling body so as to be able to rise and fall freely. (2) The metal ribbon manufacturing apparatus according to claim 1, wherein the outer tube is made of a transparent quartz tube.