JPS6336957A - Method and apparatus for producing ultra rapidly cooled alloy strip - Google Patents

Abstract

PURPOSE:To facilitate the repair in case of damaging an injection hole and to improve the operation rate by separating into a molten metal supplying tube and a molten metal injection hole part, fitting as approaching the molten metal injection hole member to a rotating cooling body and making only the molten metal supplying tube to a composition to be movable vertically. CONSTITUTION:The raw material metal 10 is charged in the molten metal supplying tube 7 and melted as heating by a high frequency induction heating furnace 6. Further, argon gas is supplied into the molten metal supplying tube 7. During melting, the current is conducted in a carbon ring 5 to heat it. After the raw material metal 10 has been melted down, the movable supporting device is worked and the molten metal supplying tube 7 is descended to push the lower end thereof on the carbon ring 5. In this way, the molten supplying tube 7 is connected with the molten metal injection hole member 3. After that, the argon gas pressure supplied into the molten metal supplying tube 7 is risen and the molten metal is supplied into the molten metal injection hole member 3 through plural hole parts in a multiple hole plate 8 and also injected to the surface of rotating cooling body 1 from the injection hole 2, to produce continuously an alloy strip.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for producing alloy ribbon by ultra-quenching. Here, the thin ribbon is not limited to one that is wider than the thickness, but also includes one that is in the form of a thin line.

[Prior art]

Conventionally, alloy ribbons with an amorphous or microcrystalline structure have been produced by melting a metal material and then jetting the molten metal onto the surface of a rotating cooling body for ultra-rapid cooling. .

An apparatus for manufacturing such alloy ribbon is disclosed in Japanese Patent Application Laid-open No. 51-4.
As shown in Publication No. 017, a molten metal supply pipe made of a heat-resistant material such as quartz and equipped with a molten metal spout at the bottom, a movable support device such as an air piston that supports the molten metal supply pipe so as to be movable up and down, and a molten metal It has an induction heating furnace and a two-rotation cooling body for melting the raw material in the supply pipe. In this equipment, the raw material is charged into the molten metal supply pipe and then melted in an induction heating furnace.

The molten metal supply pipe is lowered to a position where its spout is close to and opposed to the surface of the rotary cooling body, and the molten metal is jetted from the spout onto the surface of the rotary cooling body using gas pressure to produce a super-quenched alloy ribbon.

What moves the molten metal supply pipe up and down?

When the raw material is melted in the induction heating furnace, the single-turn cooling body (made of a highly thermally conductive material, generally copper) is heated and rotates with the heating furnace to prevent it from being able to rapidly cool the spouted molten metal. The cooling body must be kept separate from the cooling body, and in order to prevent the hot molten metal from being cooled in the air before coming into contact with the rotating cooling body when spouting molten metal, the spout port and the surface of the rotating cooling body must be kept close to each other. Because it has to be.

In the above-mentioned Japanese Patent Application Laid-Open No. 51-4017, a hollow cylindrical body is used as the rotary cooling body, and the molten metal is spouted on the inner surface of the hollow cylinder, but the nine-rotating cooling body is used as a roll.

A type in which molten metal is ejected into contact with the outer surface is also used.

[Problem that the invention seeks to solve]

In the production of super-quenched alloy ribbons as described above, the molten metal spout is worn out or destroyed by the molten metal that spouts out.

It is also susceptible to oxidation due to high temperatures.

When oxidized, it becomes more susceptible to wear and destruction.

Since the shape and size of the spout is an important factor in manufacturing the ribbon, even if the spout is slightly damaged, the molten metal supply pipe must be replaced with a new one. However, the molten metal supply pipe.

It is made of expensive ceramics and quartz materials, and the spout is
The size is 0.3~0.1111X1~100,
Machining the jet nozzle requires a high degree of skill, and the amount of processing is high. As a result, the molten metal supply pipe itself is expensive, and it is uneconomical to frequently replace the entire expensive molten metal supply pipe, leading to an increase in product cost.

Therefore, even if the spout is damaged, only the spout can be replaced without the need to replace the entire molten metal supply pipe, and moreover, it is possible to replace only the spout without having to supply inert gas or the like to the spout. A method and apparatus for producing ultraquenched alloy ribbon that can be maintained in a non-oxidizing atmosphere is desired.

[Means and effects for solving the problems] In order to solve the above problems, there are two aspects of the present invention.

The molten metal spout is divided from the molten metal supply pipe, and the molten metal spout member configured as a separate piece is placed close to the surface of the 9-turn cooling body, and after melting the raw material with the molten metal supply pipe, the molten metal spout is is lowered to connect the molten metal supply pipe portion and the molten metal spout member, and the molten metal is spouted from the spout. If the spout is damaged, only the spout member needs to be replaced.

Further, in the present invention, a carbon ring is further provided on the molten metal spout member so as to be interposed between the lower part of the molten metal supply pipe and the molten metal spout member when the two are connected, and while melting the raw material in the molten metal supply pipe, The carbon ring is heated. As a result, carbon dioxide gas is generated from the carbon ring, and the lower region of the molten metal supply pipe and the inner region of the molten metal spout member are made into a carbon dioxide gas atmosphere to prevent their oxidation.

That is, the manufacturing method of the present invention is a method for manufacturing a super-quenched alloy ribbon by melting a raw metal by induction heating and jetting the molten metal from a spout onto the surface of a rotary cooling body. is disposed close to and facing the surface of the rotary cooling body, and above the spout member, the raw metal is melted by induction heating in the molten metal supply pipe, and during the melting, the carbon ring is heated to generate carbon dioxide gas. The lower part of the molten metal supply pipe and the internal area of the spout member are maintained in a non-oxidizing atmosphere, and then the molten metal supply pipe is lowered and connected to the spout member, and the molten metal is rotated from the spout of the spout member. It is characterized by ejecting water onto the surface of the cooling body.

In addition, there are two ultra-quenched alloy ribbon manufacturing apparatuses according to the present invention.

A rotary cooling body, a molten metal spout member arranged with a molten metal spout facing the surface of the rotary cooling body and having a wide mouth at an upper part, and a carbon ring arranged at the edge of the wide mouth of the molten metal spout member. a means for heating the carbon ring; a molten metal supply pipe disposed above the wide mouth of the molten metal spout member; an induction heating device for melting the raw metal in the bath water supply pipe; and the molten metal supply pipe. a support member movably supporting the molten metal so that the bottom thereof can move between a position remote above the molten metal spout member and a position connected to the wide opening of the molten metal spout member;

The molten metal supply pipe is characterized by having means for spouting the molten metal from the spout while the bottom of the molten metal supply pipe is connected to the molten metal spout member.

〔Example〕

Hereinafter, an embodiment in which the present invention is applied to a system in which bath water is spouted onto the outer surface of a rotary cooling body made of a roll will be described with reference to nine drawings. Referring to FIG. 1, 1 is a roll-shaped rotary cooling body, only a portion of which is shown. A jet nozzle member 3 having a jet nozzle 2 closely opposed to its outer surface is disposed above the rotary cooling body 1 . The spout member 3 has a wide opening at the top, and is fixedly supported by being fitted into the mounting base 4.

A carbon ring 5 is placed on the upper edge of the wide opening at the top of the spout member 3.
is located. Electricity is supplied to this carbon ring 5 through two electric wires (not shown) 9, and by this electricity supply, the carbon ring 5 is heated and releases carbon dioxide gas.

A high frequency induction heating furnace 6 is fixedly arranged above the carbon ring 5, and a molten metal supply pipe 7 is arranged inside the high frequency induction heating furnace 6. The molten metal supply pipe 7 is vertically movable and supported by a movable support device 9 (not shown) such as an air piston.

It is curved so that it can be moved up and down between the position shown by the solid line and the position where the lower end is pressed onto the carbon ring 5, as shown by the dashed line in the figure. The bottom opening of the molten metal supply pipe 7 is closed with a perforated plate 8, and the raw material is charged and argon gas is supplied from the top opening. 9 is a ring for heat insulation protection.

The rotary cooling body 1 is made of a highly thermally conductive material, such as Cu, and includes a molten metal spout member 3, a mounting base, and 4. Molten metal supply pipe7. Perforated plate 8. The heat insulating protection ring 9 is made of a heat resistant material such as ceramic material or alumina.

In manufacturing the alloy ribbon, raw metal 10, which is a raw material, is charged into a molten metal supply pipe 7 in the arrangement shown in FIG. 2, and is heated to 1300° C. in a high frequency induction heating furnace 6 to melt it. Incidentally, alcohol supplies gas into the molten metal supply pipe. During this melting, electricity is applied to the carbon ring 5 and it is heated to 1000°C. After the raw metal 10 is completely melted, a movable support device (not shown) is operated to lower the bath water supply pipe 7 and press its lower end onto the carbon ring 5 as shown by the dashed line in FIG. 9.

Thereby, the molten metal supply pipe 7 and the molten metal spout member 3 are connected. Note that, at this time, the current supply to the carbon ring is cut off.

Thereafter, the argon gas pressure supplied to the molten metal supply pipe 7 is increased, and the molten metal is supplied into the molten metal spout member 3 through the many holes of the perforated plate 8 and is spouted from the spout 2 onto the surface of the rotary cooling body 1. let In this way, alloy ribbons can be produced continuously.

In this device, the molten metal spout member 3 is fitted and fixed in the mounting base, so even if the spout 2 is damaged, there is no need to replace the molten metal supply pipe 7, and only the spout member 3 can be easily replaced. Repair the device because it can be replaced.

Not only can maintenance costs be reduced, but the operating rate can also be improved.

Furthermore, because the carbon dioxide gas generated from the carbon ring 5 exposes the lower part of the molten metal supply pipe, especially the surfaces of the perforated plate 8 and the molten metal spout member 3, to a non-oxidizing atmosphere, oxidation of these is prevented and damage is reduced accordingly. The percentage of people receiving 1 easy will decrease. Moreover, due to the heating of the carbon ring 5, the molten metal spout member 3 is heated to a high temperature before the molten metal is supplied. There is no inconvenience of storing it away.

In addition, since the molten metal spout 2 is fixedly arranged, the cooling body 1 rotates twice.
Since the distance between the two can be kept extremely small and the distance can be kept constant, ultra-quick cooling can be performed stably.

A specific example will be described below.

Molten metal supply pipe 7 is made of Si3N4 material, 300X60φX50φ
(-) crucible type (bottom opening 30φ),
The perforated plate 8 is made of alumina material and has a disc shape of 50φ x IQ (I), and the diameter of the 6 holes is 1φ (in), and the carbon ring 5 is made of a molten metal spout member with dimensions of (60φ x 40φXIQ (in)). 3 is made of Si3N4 material and the size of the spout 2 is 0.3
50 (IIm), the distance between the tip of the jet nozzle 2 and the rotary cooling body 1 is set to 50 μm or less, and the peripheral speed of the two-rotating cooling body 1 is set to approximately 20 m/s.
An alloy ribbon of J6(ZrMO)2B12sj+3 was manufactured. The obtained alloy ribbon has a width of 50 mm and a plate thickness of 0.02) II
m and its surface flatness is ±1.0 μm.

It was a high quality wide amorphous alloy ribbon.

Further, after manufacturing the ribbon, slag (slag) made of oxides was caught on the perforated plate 8, and almost no staining of the spout portion 2 due to the slag was observed. The slag caught on the porous plate 8 is the oxide 11 produced when the raw metal 10 is heated.
This is not due to an oxide film formed by contact with air in a molten state.

When a ribbon was produced without using carbon ring 5,
The spout of molten metal from the molten metal spout 2 becomes extremely unstable.
It was also observed that the spout 2 was clogged with slag.

〔Effect of the invention〕

As is clear from the description of the above embodiments, in the present invention,
The molten metal supply pipe and the molten metal spout part are separated, the molten metal spout member is fixedly arranged close to the rotating cooling body, and only the molten metal supply pipe is moved up and down, so there is no possibility of damage to the spout. In this case, only the spout member needs to be replaced, and the work is easy. Therefore, equipment repair and maintenance costs are reduced.

It also improves the operating rate.

In addition, a carbon ring is placed on the spout member and heated while the raw material is melted in the bath water supply pipe, so carbon dioxide gas is generated and prevents oxidation of the lower part of the molten metal supply pipe and the molten metal spout member. It is also possible to prevent oxidation of the molten metal. Furthermore.

The heating of the carbon ring also heats the molten metal spout member, so
Thereafter, the molten metal is ejected at a high temperature, so that ultra-rapid cooling can be stably performed.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an apparatus according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Rotating cooling body, 2... Molten metal spout, 3... Molten metal spout member, 4... Mounting base, 5... Carbon ring, 6...
... Visiting heating furnace, 7... Molten metal supply pipe, 8... Perforated plate. iI l Figure ■ Procedural amendment (method) Showa 4z f/month/2E

Claims (1)

[Claims] 1. In a method for manufacturing an ultra-quenched alloy ribbon by melting a raw metal by induction heating and spouting the molten metal from a spout onto the surface of a rotary cooling body, a spout member having a carbon ring is used. Disposed close to and facing the surface of the rotary cooling body, the raw metal is melted by induction heating in the molten metal supply pipe above the spout member, and during the melting, the carbon ring is heated to generate carbon dioxide gas. The lower part of the molten metal supply pipe and the internal area of the spout member are maintained in a non-oxidizing atmosphere, and then the molten metal supply pipe is lowered and connected to the spout member, and the molten metal is rotatably cooled from the spout of the spout member. A method for producing a super-quenched alloy ribbon, characterized by ejecting it onto the body surface. 2. In an apparatus for manufacturing an ultra-quenched alloy ribbon by melting raw metal by induction heating in a molten metal supply pipe and jetting the molten metal from a spout onto the surface of a rotary cooling body, the rotary cooling body and the A molten metal spout member arranged so that the molten metal spouts face each other on the surface of the rotary cooling body and has a wide mouth at the top, a carbon ring arranged at the edge of the wide mouth of the molten metal spout member, and heating the carbon ring. means for melting the molten metal, the molten metal supply pipe disposed above the wide mouth of the molten metal spout member, an induction heating device for melting the raw metal in the molten metal supply pipe; a supporting member movably supporting the molten metal spout member so as to be movable between a position remote above the molten metal spout member and a position connected to the wide mouth of the molten metal spout member; and a means for spouting molten metal from the spout while connected to the spout.