JPS58199647A - Production of amorphous alloy - Google Patents

Abstract

PURPOSE:To obtain spherical particles of an amorphous alloy having high out of roundness by injecting molten metal to the specific position on a disc which has good thermal conductivity, and rotates at a high speed with inclination by a prescribed angle to the injection axis of the molten metal and cooling the molten metal quickly. CONSTITUTION:A flat plate-like copper disc 20 is rotated at a high speed by means of a motor 17 via driving shaft 26 and molten metal 12 is injected onto the disc 20. The angle theta assumed by the injection axis 32 of the metal 12 and the plane of the disc 20 in this case is set at 10-60 deg.. The molten metal is injected so as to contact with the surface of said disc within the range of 180-360 deg. azimuth (the third quadrant and the fourth quadrant) in the coordinate system wherein the center X of rotation of the disc 20 is taken at the origin, the rotating direction of the disc is taken in the positive direction of the azimuth and the radius vector located in the relation minimizing the angle assumed by the positive direction of the azimuth at an optional point on the radius vector and the positive direction of the axis 32 is taken in the positive direction of the axis 32 is taken in the positive direction of the X-axis on the plane of the disc 20. The spherical particles or fiber having good symmetricalness are thus obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a 77-Runonos alloy. Although it is known that amorphous alloys can be obtained using amorphous alloys, electrolytic metal plating, electroless plating, low-depletion metal plating, sprocketing, etc., the most commonly used method is 4, there is a method C in which a molten liquid alloy is injected into a highly thermally conductive drone rotating at high speed and rapidly cooled at a negative rate of 10'''C/31f11.

Since the LTS alloy obtained by such methods has an amorphous structure, it has a low mechanical strength 1a, a low coefficient of thermal expansion, a small damage to the BL copper wire, and has good chemical corrosion resistance and resistance. It's back to being abrasive. In particular, as a magnetic material, the adhesive material must be free of #4 structure defects such as grain boundaries, have magnetocrystalline anisotropy, coercive force, and relative permeability. It has excellent properties such as a noticeable loss in vA ratio and a high electrical resistivity. For this reason, amorphous alloys have been put to practical use in magnetic heads, magnetic shields, and magnetic cartridges, as well as in relays, printing and translating systems, sensors, transformers, and transformers.
7. It is expected to be used in extremely wide seams. As a special example, amorphous materials have been discovered that have extremely large magnetostriction constants and electromechanical coupling coefficients compared to conventional metals or ferrite materials, and are useful for ultrasonic transmitting/receiving elements, variable ultrasonic delay lines, etc. There are also expectations for its application.

As mentioned above, amorphous alloys are expected to be applied in many fields such as information technology, 1-recto-O-nics, mechatronics, and energy-saving V-technology.
A simple and highly productive method for producing amornonosu alloy has been studied. On the other hand, in the fields of micromechanics and microelectronics, fine amorphous spherical particles and amorphous materials meet such demands.

A conventional manufacturing method is shown in FIGS. 1 to 4. Figure 1 shows
The injection nozzle 30 is brought close to the inner wall of the cooling cylinder 11 consisting of a cylindrical container rotating at high speed, and the molten metal (melt) is
12 was injected into contact with the side wall from an injection nozzle using a high-pressure inert gas, and a method was shown in which the ribbon-shaped Ruf7 alloy was rapidly cooled and 4R was applied using rotational force. There is a way to survive.

In Figure 2, the injection nozzle 30 is brought close to the surface of the cold Hjt'+- rule 14 undergoing [61 rotation (, similar to E, high 11 inert gas is used - (), and the molten alloy is discharged from the injection nozzle. By injecting 1!, rapid cooling is achieved by utilizing rotational force!
Figure 3 shows a method for obtaining ribbon-shaped 77'[glunois alloy 133].
[l For one method, rotation sound 1-ru 14a, 14b on both sides
4! r provided, the phase of the roll! Molten gold lK1 on the contact surface of j
Spray 2 and let it cool rapidly 1!1.7. t, T.E.
A twin-rule method for obtaining Rufunosu alloy 13 has been demonstrated.

By using these methods, J9 size 5] 0μm, width 1.
It is known that a ribbon-like alloy as small as 10011ik4 can be produced.

However, it has not been possible to produce noivar or spherical particles j' of the 7-morphous alloy by the method of 1iiL.

Therefore, as a conventional means devised to obtain the horned Jiber of Lennon S.A., the one shown in Fig. 4 is known. Immediately, water 1 is poured into the hollow cooling cylinder 15.
6, the cooling cylinder 15 is rotated by the motor 17, a high-speed water flow is generated on the inner side wall of the cooling cylinder using centrifugal force, and the molten alloy 12 is spouted into this water flow to rapidly cool it. This is a method to obtain 77 points. However, with the above method, it is difficult to obtain a symmetrical spherical powder.
It was difficult. In addition, the spherical particles and fibers obtained by rapid cooling by the above method accumulate in the cooling cylinder, and therefore are not suitable for industrial mass production.

豫) As a method of composing spherical particles of rufus alloy,
Conventionally, the spark erosion method and the atomization method are known, but in the former method, a very small amount of distorted spherical particles with a diameter of 5 to 30 μm cannot be obtained by discharging in oil. Recovering particles from oil is troublesome and requires several ultrasonic cleanings. In addition, on the rear right, it is possible to obtain a multi-pot powder by dropping the molten alloy into the jet water stream, but the shape of the cup is irregular.
Neither of these methods is a method for obtaining an amorphous alloy with good spherical particles.

The present invention has been made with the aim of improving the following two drawbacks.46 The molten alloy is placed at a predetermined position on a highly thermally conductive disk that rotates at high speed and is inclined at a predetermined angle with respect to the injection axis. The purpose is to rapidly cool C1 by spraying and continuously obtain highly circular spherical particles or fibers of amorphous alloy. The inventors have also discovered that there are optimum conditions for the contact position and contact angle of the molten alloy on the disk, and that spherical particles or fibers are produced only under these conditions.

The present invention has been made based on the findings described in 1-.

That is, in the method of the present invention, the molten alloy is injected onto the surface of a highly thermally conductive disk rotating at high speed, and the molten alloy is rapidly cooled to produce amorphous spherical particles or 7I particles. There is a method C in which the injection direction of the molten alloy with respect to the disk surface (the injection axis with the opposite injection direction being positive) makes an angle of 106 to 60 degrees with respect to the disk surface, and , on the disk surface, with the rotation center of the disk as the origin, the rotation direction of the disk is the positive azimuth direction, and the angle between the positive azimuth direction and the positive direction of the injection axis at any point on the radius vector is In a coordinate system in which the radius vector located in the minimum relationship is taken as the X-axis stop direction (starting line), the azimuth angle is 180° to 360° (third
The method for producing an amorphous alloy comprises bringing the molten alloy into contact with the surface of a rotating disk within the range of the four quadrants and the fourth quadrant for rapid cooling. Here, the molten alloy is not particularly limited as long as it becomes an amorphous material by rapid cooling. For example, iron.

An alloy of a group element and a semimetal C such as P, C, B, Si, etc., or an iron group element and a rare earth metal Gd.

It is an alloy with Tb, DV, etc. The rotational speed of the disk is selected so that the circumferential speed at which point of contact between the molten alloy and the disk surface is appropriate. The peripheral speed is desirably from 3°71/sec to 5.61/Sec.

In the above configuration, the disk surface is connected to the injection shaft 32 of the molten alloy.
The reason why the inclination is within the range of 10° to 60° with respect to the angle is because this is the range in which spherical particles and fibers can be appropriately produced. Here, the injection axis 32 refers to an axis that takes the direction opposite to the axis (Atsu C1 injection 1) taken in the injection direction of the molten alloy (see Fig. 5, the inclination angle is as shown in Fig. (indicated by θ above). The smaller the inclination angle, the larger the contact area between the molten alloy sprayed 11 and the disk, and the greater the cooling effect.

If it is too small, contact will become unstable. From this, there is a minimum degree angle. On the other hand, if the inclination angle is large, the contact area becomes small and spherical particles or noa or ivar cannot be obtained. Further, the injection position of the molten alloy on the disk F also has an optimum range as follows. With the rotation center of the disk as the origin, the direction of rotation of the disk is in the positive azimuth direction, and the angle between the positive azimuth direction and the positive direction of the injection axis 32 at any point on the radius vector is the minimum; That is, the radius vector located in the relationship that is equal to the inclination angle θ formed by the disk, jet, and pull ring 32 is taken in the positive direction of the X axis.9! In the standard system, lJ self-weight 80° ~ 360
If the particles are injected into contact within the range of (3rd and 4th quadrant), spherical particles or fibers with good symmetry can be obtained.

The above range will be explained in detail with reference to the drawings. FIG. 6 is a plan view of the disk viewed from a direction perpendicular to the disk surface.

In the figure, A, B, and C are injection points P and Q on the disk, respectively.
, the injection shaft 32a at R.

This is an injection axis symbol indicating the positive direction of 32b and 32c.

Moreover, FIGS. 7(a), (b), and (C) are a when the injection axis is set at point P, point Q, and point R, respectively.

ty, is a side view in the direction of the arrow c. Now, let us assume that the angle of inclination between the disk surface and the ejection axis is θ as shown in FIG. At point R, the angle between the positive azimuth direction and the injection axis C is equal to the inclination angle θ, as shown in FIG. 7(C). Also, at point P, the angle between the positive azimuth direction and the injection axis is 180°-
It is 〇. Also, at point Q, the positive azimuth direction and the injection axis B
The angle formed with is 90°. In this way, it can be seen that the point where the angle between the positive azimuth direction and the injection axis is the smallest is point R. Then, in a coordinate system in which the radius including the R point is the X wheel and the rotation center is the origin, the injection is made to approach the azimuth within the range of 1806 to 3600 (the shaded area in Figure 6)5.
Outside the above range, spherical particles or fibers will not be formed.

Do you get spherical particles or fibers (well, it depends on the rotation speed, the higher the speed, the more fibers you get.

The diameter of the injection nozzle is appropriately selected in consideration of the cooling effect, such as the diameter of the product C) or the particle size of the spherical particles. If []l\ is too large, the cooling effect will be small and the desired spherical particles or fibers will not be obtained. In addition, for spraying the alloy from the spray nozzle, it is preferable to use pressurized inert gas, although it is popular.

The injection direction of the above-mentioned molten alloy is not necessarily limited to the vertical direction. For example, the rotating disk may be placed horizontally, and the jetting direction may be inclined relative to this.

As mentioned above, J decided to select the contact angle and contact device when injecting molten alloy onto the disk surface rotating at high speed.
The effect is that spherical particles or particles whose surfaces are in an amorphous state can be continuously obtained by effective rapid cooling fJ].

Further, unlike known means, since no cooling water is used, the amorphous surface is not oxidized. The spherical particles produced by the method of the present invention have good spherical symmetry.

Embodiment FIG. 5 shows a specific means for obtaining an amorphous alloy by the method of the present invention.

It is made of a material with good thermal conductivity, such as copper, and t, = q!
The root plate-like disk 20 is attached to the drive shaft 26 of the motor 17, and rotates once upon receiving the rotational force of the motor 17. Is this own disk west? ! There is 200alt-, and when producing fiber, rotate at 4500rpm+.
When producing spherical particles, rotation was performed at 300 Orpm. The inclination angle between the molten gold and the injection direction of the gold and the disk 20 was set to 30°. The position of the injection point on the f-isk 20 is within the third quadrant (with an azimuth angle of 180'+45°
(α-45°), rll- from the center of rotation of the disk
11 approx. 75) mm. In this case, the circumferential speed of this contact +j, i (゛).

4500 rpm and about 5) 62 cm sec (
Yes, the speed is about 3000 rpm, about 3-7! ')
(:m,' bec ('There is.

In such Md, alloy composition t, raw material r% (Fe-
79%, 5i-2%, 13-17%, 0r-2% and I
The above alloy 12 was melted by heating to about 1200°0.
From the alloy injection nozzle 330 of >lφ, 1.5 IF of )'ruin gas was extruded and injected to obtain spherical particles or 5 IF of each. The shape of the powder has spherical symmetry, 1 diameter 0.1-0,
It was 211-φ. g) Iim-4,1 cross section is circular striped, *”E IYo, 1-0,
2 mmφ(a-)ta, 1

[Brief explanation of the drawing]

Figures 1 to 3 show conventional ribbon-shaped anomalous
The block diagram of I5 is shown in Figure 4, using the J method.
A conventional method for manufacturing spherical particles or horn-shaped 7T lunion particles is shown in Fig. 5. Figure 6 shows the method for manufacturing anomalous alloys.
Figure 7 (a) is a plan view in the direction of the arrow.
(b>, (c) are side views C in the directions of arrows a, b, and c in FIG. 6, respectively. 20...Disk 30...Alloy injection nozzle special crystal 1 Applicant: Aisin Seiki Co., Ltd. Patent Attorney J: Inugawa Hiroma Patent Attorney Shudo Fujitani Patent Attorney Akira Maruyama Person No. 1
figure

Claims (1)

[Claims] This is a method of producing amorphous spherical particles or fibers by injecting the molten alloy onto the surface of a disk that rotates at a high speed and has good thermal conductivity, thereby rapidly cooling the molten alloy. The injection axis (in which the injection direction of the molten alloy with respect to the disk surface and the opposite injection direction are positive) forms an angle of 10° to 60° with respect to the disk surface, and The center of rotation of the disc is set to the 1 east point, and the direction of rotation of the disc is set to the azimuth of 1
Coordinates taken in the X-axis stop direction (starting line) of the radius vector located in the relationship where the angle between the positive azimuth direction at any point of the radius vector F and the positive direction of the trunk axis is the minimum A method for producing a two-morph I-based alloy, which comprises injecting molten alloy onto the surface of a rotating disk within the azimuth angle range of 1806 to 360° (third and fourth quadrants) and rapidly cooling it.