JPS5828020B2 - Manufacturing method of tape-shaped amorphous metal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved method for producing thin, elongated tape-shaped amorphous metal.

In general, by rapidly cooling molten metal to prevent it from crystallizing, it is possible to impart mechanical and physical properties that are not found in ordinary metals. BACKGROUND OF THE INVENTION Crystalline metals have been produced.

The present inventors previously developed a method for producing tape-shaped amorphous metal by squirting molten metal between two closely rotating rolls that rotate at high speed, rolling it, and cooling it. In this process, a method was developed in which a metal belt was run around each of the two adjacent rolls, and the surfaces of the metal belts of the two adjacent rolls applied rolling and quenching to the jet stream of molten metal. The present invention has been made with the aim of further improving this.

In general, in either the conventional rolling and cooling method using rolls or the rolling and cooling method using a belt as described above, the molten metal (approximately 1000°C) is still sufficiently cooled immediately after rolling and cooling and comes out of the rolls or belt. Especially 5
If the width is wider than wrL, cooling is more likely to be insufficient.

However, when this insufficiently cooled metal tape is naturally cooled by 1x, crystallization progresses and the resulting metal tape becomes brittle, and this tendency becomes particularly severe in the case of the tape having a width of 5 mm or more.

Conventionally, a method of blowing gas under the rolls has been used to speed up the cooling of the metal tape that has passed between the rolls, but it is difficult to achieve a sufficient cooling effect, and the resulting tape may have bends, waviness, and warpage. It has the disadvantage that it causes some kind of habit.

A cooling method using water instead of gas can also be considered, but this is not preferable because the viscous force of the air accompanying the rotation of the rolls causes the water to move above the rolls and come into contact with the molten metal before rolling.

The inventors investigated the drawbacks of the gas cooling method and found that this is because the temperature of the tape immediately after rolling is still within the range that allows plastic deformation. We found that this could be avoided by taking a forcing method to prevent the tape from deforming and cooling it in this state, and by increasing the time during which the tape is sandwiched between belts in the belt-interposed rolling method developed by the inventors mentioned above. By doing so, we were able to achieve the desired results.

That is, in the method of the present invention, after rolling and quenching the jet stream of molten metal using two adjacent rolls with a metal belt interposed, the hot metal tape immediately after rolling is continuously rolled and cooled without releasing the hot metal tape from between the metal belts. If the tape is held between belts and allowed to cool, and the tape is further rolled while being held between the metal belts, it is possible to advantageously obtain a tape with excellent straightness.

The method of the present invention will be explained below using examples shown in the drawings.

In Fig. 1, endless metal belts 4, 4 are wound around two adjacent rolls 2, 3, respectively, one belt is connected to roll 2 and a guide roll 5°6, and the other belt is connected to roll 3. Guide roll T.

8, and each belt is moved in the direction of the arrow by the rotational drive of these guide rolls or the rotational drive of the adjacent rolls.

Therefore, the jet stream 1 of molten metal is jetted out between the melting rolls 2 and 3, and since each roll 2 and 3 is covered with a belt 4, the molten metal is passed through the belt 4 to the rolls 2 and 3.
It is rolled at 3.

Therefore, the molten metal is directly cooled and rolled by the belt 4, and the adjacent rolls 2 and 3 serve to press the belt 4.

Further, below the adjacent rolls 2, 3, one or more pairs of attached rolls 9, 9' are further provided on the mating surface side of the belt 4.4.
...... is installed, so melee roll 2, 3
The metal tape, which has been rolled and quenched between the belts 4 and 4 and is still hot enough to allow plastic deformation, is then continued to be rolled by the attached rolls 9, 9' while being held between the belts 4 and 4. during which sufficient cooling will be provided.

According to the method of the present invention, the contact time with the metal belt 4 can be made AC/AB times as long as in the case where no attached roll is installed, and a metal tape 10 with a sufficient cooling effect on the metal tape and excellent straightness can be obtained. It will be done.

In addition, the pressure of the attached rolls 9, 9'... is based on the belt 4,
It is sufficient that the contact with the metal tape by 4 is effective, and there is no need to make it large enough to perform rolling.

Also, attached rolls 9, 9'... are adjacent rolls 2, 3.
The closer you place it, the greater the effect, so it's best to use multiple pairs of small rolls! Yes.

Embodiment 2 As shown in FIG. 2, the attached rolls 9 are not paired but are installed on one side of the belt 4, and the metal tape is held in contact with the metal belts 4, 4 to one of the proximal rolls 3 and the attached roll 9. This is made sufficient by winding the metal belts 4, 4 in a meandering manner.

Incidentally, contrary to the case of the first embodiment, the larger the attached roll 9 is, the more effective it is.

Embodiment 3 As shown in Fig. 3, a retractable metal strip 4 is used instead of a belt.
' is used, and the metal strip 4 is moved from the left and right feed drums 11
', and the winding drum 12 functions similarly to the attached roll shown in FIG.

This example is basically the same as Example 2, but since the winding drum 12 also serves as an attached roll, it has the advantage of being simpler in terms of equipment.

By employing the above method of the present invention, it is possible to easily obtain a wide metal tape with good flatness, such as a width of 5 to 20 rrvn, and it is particularly effective in producing thin tapes of approximately 60 μm or less, which have great practical value.

Further, according to the method of the present invention, cooling is performed by the fastest heat conduction, so forced cooling such as gas cooling is not necessarily required, but a combination of these methods may be used.

[Brief explanation of drawings]

1 to 3 are explanatory diagrams showing an embodiment of the method of the present invention. 1... Metal jet stream, 2, 3... Proximity roll, 4... Metal belt, 5-8...
・Guide roll, 9゜9', 9''... Attached roll, 10... Metal tape, 11... Feed drum, 12... Winding drum .

Claims (1)

[Claims] 1. While passing a metal belt around two closely rotating high-speed rolls, the jet stream of molten metal is rolled and quenched by the surfaces of these metal belts between the close rolls, and then the resulting hot metal tape is A method for producing a tape-shaped amorphous metal, characterized in that the metal belt is subsequently cooled while being held between the surfaces of the metal belt.