JPS6021160A - Production of ultraquickly cooled light-gage metallic strip - Google Patents

Abstract

PURPOSE:To obtain a light-gage metallic strip which has extremely little ruggedness on the front and rear and has no holes with a process for ejecting a molten metal through a nozzle port to the surface of a cooling body under movement by specifying the temp. of the molten metal as well as the position and shape of the nozzle port. CONSTITUTION:A molten metal 13 is ejected from a molten metal well 14 through a nozzle port 15 onto the surface of a cooling belt 11 which moves toward the direction of arrow, thereby producing an ultraquickly cooled light- gage metallic strip 17. The molten metal 13 in this stage is maintained at the temp. higher by >=(70-300 deg.C) than the m.p. of said metal. The spacing between the port 15 and the belt 11 is made 0.01-0.4mm. and the thicknesses at the tip of the nozzle in the moving direction of the belt 11 on the front end side 16a and rear end side 16b in the moving direction of the belt 11 are respectively specified at >=2mm. and >=1mm..

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for producing a metal ribbon using an ultra-quenching method.

Conventional structure and its problems The technology called ultra-quenching method uses a cooling chamber J1 to move molten metal.
Above the coagulated heart erupting on the surface of the body, 105-106 °C /
This is a method of obtaining a metal ribbon at once by so-called ultra-quenching, which cools at a rate of seconds. When long λII bands are continuously produced, metal is generally heated and melted in a molten metal reservoir, and the molten metal is continuously jetted and solidified through a nozzle port onto the surface of a moving cooling body such as a metal bell 1 or a rotating roll.

That is, as shown in FIG. 1A, the surface of the metal belt 1 as a moving cooling body; The molten metal 3 melted by the high-frequency heating coil 2 is held in the molten metal reservoir 4, and a nozzle 6 with a nozzle 115 on the right side is provided at the lower end.

Next, 11-force is applied to the surface 3a of the molten metal, and the molten metal 3 is brought into continuous contact with the metal belt 1 from the nozzle opening 5,
The ultra-quenched metal ribbon 7 is quenched by quenching. At this time, the temperature of the molten metal 3 melted in the molten metal reservoir 4 is as follows:
Generally, temperatures at or near the melting point of the metal are used.

Also, the width of the metal belt 1 of the nozzle opening 5 in the moving direction is 02.
~' 1 mm culm growth is common, and the gap between the tip surface of the nozzle 6 and the metal bells 1 to 1 is about 1 mm or less. Furthermore, the most commonly used width in the moving direction of the metal belt 1 at the tip of the nozzle 6 is 0.2 to 3 in both directions.

As a moving cooling body in place of the above metal bells 1 to 1, FIG.
Even if the rotating metal roll 8 is used as shown in J, the ultra-quenched metal ribbon 7 can be produced in the same way! J! ! I can do it.

This J: λh quenched gold Ii by the conventional method! When manufacturing a thin ribbon, it is relatively easy to use a general amorphous alloy ribbon.
! In the production of ultra-quenched ribbons of metals such as 1 to 10 wt% Si, balance iron), the surface properties of the ribbons are poor, especially when the ribbon surface does not come into contact with the moving cooling body (free 71%). r
rii), a metal ribbon with noticeable irregularities and holes is produced. -For example, 6.5
A thin metal strip consisting of w1% Si and the balance iron is heated in a molten metal reservoir at a temperature of 1500°C (approximately GO''C higher than its melting point of about 1440°C), and this molten metal is heated to 1ONnX 0.
．． It is ejected through six nozzle ports onto the surface of a roll rotating at a surface speed of 25 m/sec.

At this time, the gap between the nozzle opening and the rotating roll surface is ()6mm.
The thickness of the nozzle tip in the roll surface movement direction on the tip side in the roll surface movement direction was 1 mm. The free surface of the 10# wide ribbon produced by this method is shown in the second figure.
The strip surface had irregularities of about 20 μm at the maximum, and the surface of the ribbon on the side in contact with the roll also had spike-shaped holes of about 20 μm at the maximum. These irregularities on both sides have a thickness of 35 mm.
μm, a l='R band with partially through holes was fabricated.
The thin strip made of 3i and the remainder iron has poor surface properties and partially forms through holes, resulting in significantly poor magnetic properties such as coercive force HC. In addition, when this ribbon is used as a magnetic core in equipment, the space factor shows a low value of 50" □ 60%, which has a negative impact on the design of the equipment.
- In the ρ-3i series ribbon used as a moon, there were problems such as defects occurring at the I-welding locations due to surface irregularities and weakening the welding strength.

OBJECTS OF THE INVENTION The object of the present invention is to provide a manufacturing method that eliminates the drawbacks of the conventional method described above and can produce an ultra-quenched metal ribbon that has very few irregularities on the front and back sides and has no holes. This means that all of these! l) The loss of color (magnetic 1h property, etc.) of Y1 is attempted.

41i Formation of the Invention In order to achieve the above object, the present invention provides a process in which the molten metal is ejected from the molten metal reservoir through the nozzle orifice onto the surface of the IJ body to create a metal ribbon. , the temperature of the molten metal in the molten metal reservoir is the melting point J of the metal,
・When maintaining the temperature at -300°C or higher and supplying the molten liquid to the cooling body moving through the nozzle 1])
Mu mark nozzle 1:1, the gap between the transfer cooling nozzle Jj body is 0,01
~0.4mm, and the thickness of the cooling body moving direction on the optical end side of the cooling body moving surface at the nozzle tip is two or more planes, and the
The thickness in the direction of movement of the cooling body on the rear end side in the direction of movement of the cooling body is 1
mm or more.

Nowadays, if the temperature of the molten metal in the molten metal reservoir is set to a temperature above the melting point and below 70°C below the melting point, no matter what nozzle opening setting and J2 setting, high quality silicon with good surface properties will be produced. The iron ribbon was not jqed. Is this the melt spouted from the nozzle mouth? 'A This occurs because the low humidity causes local solidification between the roll surfaces at the nozzle opening or nozzle tip, and the flow of the molten metal during solidification is disturbed. -1, the temperature of the metal melt in the molten metal reservoir is higher than the melting point 3
If the temperature is higher than 00℃, contact with the roll alone will not cool the raw white body for 1 minute! The molten metal spouted from the nozzle opening has a tendency to scatter, and the high-quality ribbon
I couldn't do it. The temperature of the molten metal in the molten metal reservoir is the melting point J
: Maintain high humidity in the range of 70 to 300 degrees Celsius), use a nozzle whose tip end has a thickness of 2 mm or more on the tip side in the direction of movement of the cooling body, and move the nozzle through the gap between the nozzle opening and the moving cooling body. When observing the unevenness on the surface of the ribbon produced in this way, as shown in Fig. 3, when the gap is 0.4 mm or more, the unevenness on the front and back sides of the ribbon (free surface, roll surface) becomes narrower and becomes larger. J with a through hole: Unaru.

On the other hand, setting the gap to less than 0.01 mm is difficult, and even if the gap is set, it will not work properly. The thickness of the nozzle tip on the light end side in the direction of cold body movement is 2.
If the thickness is less than mm, even if a thin strip is made using the settings as described above, the thin strip with poor surface properties will tend to gather.
In this case, the molten metal was scattered and did not form into a thin ribbon. It is assumed that the molten metal filled between the tip of the nozzle and the surface of the moving cylinder 741 forms a "pool", and that the length of this pool is approximately 2 mm and thin. In film analysis (, L, generally an accumulation of mm is observed.

The thickness of the nozzle tip on the tip side in the direction of movement of the cold 7I 4 body is 2 m.
When the thickness is 3 mm or more, it is possible to produce a ribbon with good v1, but when the thickness is 3 mm or more, it is most easily possible to produce a ribbon with good surface properties. Also, the thickness on the rear end side in the direction of movement of the cold body on the opposite side is preferably 1 mm or more. If the width is less than these values, the molten metal will swirl around the nozzle cooling body surface gap and it will be difficult to form a thin ribbon.

As described above, in the present invention, when the nozzle 1-1 is manufactured using a static manufacturing method, the molten metal ejected onto the moving cooling body surface 1 fills the gap between the nozzle tip surface and the moving cooling body surface. As a result, local solidification near the nozzle L does not occur, and a smooth molten metal flow (laminar flow) occurs, causing a flow between the nozzle tip surface and the moving cooling fJ.
A steady state flow of vlmm is generated between the surfaces of one body, and this is rapidly solidified by a moving cooling body to produce a high quality ribbon.

Description of examples Embodiments of the present invention will be described below based on specific examples.

Example 1 As shown in FIG. 4, the surface speed of the moving copper cooling belt 11 is set to 23 m/sec, and the high-frequency heating coil 1 is placed on top of the moving copper cooling belt 11.
A molten metal 13 of 1700'C (approximately 260°C or more higher than the melting point) made of L5) vt%Si and the balance iron was held in a molten metal reservoir 14 with a width of 0. A cooling bell with a quartz nozzle 1G having a rectangular nozzle opening 15 with a length of 10# in Gmmz! It was provided on the surface of -11 almost in close proximity to sub-111. The tip of the nozzle 16 is connected to the cooling belt 1.
1, and the thickness of the tip side 16a in the belt movement direction of the cooling belt 11 in the movement direction is 5.
mm, and the rear end side 1 in the moving direction of the cooling belt 11 on the opposite side
61) to 2 mm, and the surface 13a of the molten metal 13 in the IC0 melting reservoir 14 is lowered by 0.77 (ff/
By pressurizing with a high-pressure horn, the molten metal 13 is continuously ejected from the nozzle port 15 and rapidly solidified by the cooling belt 11.
An ultra-a cold high silicon fAiW band 17 with a width of I1+1 and a thickness of 35μ711 was fabricated. The surface unevenness of this ribbon is shown in Figure 5.
J' J: Maximum amount of sea urchin was approximately 4 μnL. When a model magnetic core was assembled using this thin strip, the space factor (A) was 586%. j.

Example 2 As shown in FIG. 6, melting was carried out by a frequency heating coil 22 almost perpendicular to the surface of a rotating cooling roll 21 made of chrome steel with a diameter of 30 cm and rotating at 1500 rpm.
．． A molten metal 23 consisting of 5 wt% S1 and the balance iron at 1600°C (approximately 170°C higher than the melting point) is held in a molten metal reservoir 24, and has a width of 1.2 mm and a length of 20 m.
Silicon nitride nozzle 2 with a rectangular nozzle opening 25 on the right
6 was established.

The tip of the nozzle 26 is removed from the surface of the rotating cooling roll 21.
．． They were fixed at a distance of 3 mm, and in order to smooth the flow of the molten metal from the nozzle opening 25 to the tip, a curvature of 9.8 mm was applied to the trailing edge of the nozzle tip on the tip side 2Ga in the rotational direction of the nozzle. In addition, the roll surface of the tip side 2Ga in the roll rotation direction of this tip part and the thickness of ifi+ in the Ll-rotation lJ direction of 817 rows in the roll rotation direction are in 3 order, and the thickness in the roll rotation direction 400 on the opposite side is
The thickness of the a side 26b was set to 1.5 mm. The surface 23a of the molten metal 23 in the molten metal reservoir 24 is reduced to 0.5 below atmospheric pressure9.
The molten metal 23 is continuously spouted from the nozzle port 25 and cooled by rotation.
When rapidly solidified with a JI roll 21, an ultra-quenched high-silicon iron ribbon 27 with a width of 20 ram and a thickness of 40 μm was formed.
It was μ7n.

When a model magnetic core was assembled using this ribbon, the space factor was 89%, and the coercive force 1-IC was about four-fifths of that of the ribbon made by the conventional method. l [.

Example 3 As shown in FIG. 7, a resistance heating (electric) The molten metal 33 of NWI96S melted by 32:, 0.3 wt% Mq, balance aluminum or 15 G! A quartz nozzle 3 is held in the quartz nozzle 3 and is held in a quartz nozzle 3 with a width of 0.4 mm and a length of 40 mm.
G was 1iuL. 0.08 nrm ril from the surface of the rotating cooling roll 31 to the tip of the nozzle 3G. 3. Front end side of the rotating surface of the nozzle tip 36
The roll rotation direction j9 of a is 8. mm, 1 on the opposite side
The thickness of the rear end side 36b in the direction of rotation of the first wheel was 3 mm.

Pressurizing the surface 33E1 of the molten metal 33 in the molten metal reservoir 34 at a pressure higher than atmospheric pressure J, 10 m/- or more,
1. When the metal melt (33) is ejected from the nozzle opening 35 and the target 12-11f is rapidly solidified with the rotating cooling roll 31, a 40# width GO with very few surface irregularities is produced.
71m thick IB quenched thin? j) 37 kain light
fc. Kono WJ Wr (J) Maximum surface unevenness is 2μ? +
It was 1. Is this thin strip made of aluminum? y tangent σ)
l: I- (when used as 11, 2 sheets without defects)! The aluminum plate was successfully welded.

According to the manufacturing method of the present invention, as described in the 1991 Song Dynasty-1- of the invention, the unevenness on the surface of the ultra-quenched metal ribbon is particularly small. , ordinary super-quenched piece 1
]-Compared to the crystalline ribbon obtained by the method, it is possible to provide a ribbon with surface irregularities that are approximately one-half or less.

When using the λ9 band as a magnetic core material, this high-quality thin ribbon not only improves magnetic properties (11) such as low coercive force, but also improves the space factor! - It also has the advantage of being able to make the porcelain installation more compact.

Also, with this method, 1! '7 High quality 8 strips for welding 1
．． When used as a 1-material, it also has the advantage of allowing defect-free welding. Furthermore, this method of producing high-quality ribbons can be applied to various materials.

[Brief explanation of drawings]

Figures 1A and B are diagrams for explaining a conventional three-point method for producing ultra-quenched metal ribbons, respectively, and Figure 2 is an explanation of the surface irregularities of the ribbon produced by the method. Figure 3 shows the relationship between the nozzle-roll gap and the surface unevenness of the ribbon.
FIG. 4 is a diagram for explaining the method of manufacturing an ultra-quenched metal ribbon according to an embodiment of the present invention. FIG. Figure, No. (
Figure 3 J3 and Figure 7 depict other embodiments.
FIG. 1 is a diagram illustrating a method of manufacturing a quenched gold 1i thin strip. 11...Cold) J1 Hell 1~. 21, 31...Rotary cold nozzle J1[]-le, 12.22...High frequency heating"il, 32...Resistance heating furnace, 13, 23.33...Metal shuttle f-gata, 1/1 ,24.34...molten metal reservoir, 15,2
5.35...Nozzle opening, 1(i, 2G, 3(i・
... Nozzle, 16a12-Ga, 3 (ia... Nozzle tip end in belt movement direction or roll rotation direction tip side,
1 (ib, 2611.36b... Belt movement direction of the nozzle tip 3 or 1" - rotation direction after 9;): side,
17.27.37...Ultra-quenched metal thin strip agent Hiroshi Moriki Raku Figure 1 (/'l) Figure 2 Figure 3 Nosuf L-0-le fi%, (mm) Figure 4 Figure 5 Figures 5-7

Claims (1)

[Claims] 1. When producing a metal ribbon by spouting molten metal from a molten metal reservoir through a nozzle port onto the surface of a moving cooling body,
When maintaining the temperature of the molten metal in the molten metal reservoir at a high temperature of 70 to 300 ° C. or higher than the melting point of the metal, and supplying the molten metal onto a cooling body that moves through a manzururo,
The gap between the nozzle opening and the moving cooling body is 0.01 to 0.04
mm, and the cold J on the tip side of the nozzle tip in the direction of cooling body movement.
The thickness of the ul body in the direction of movement of the cooling body is 2# or more, and the thickness of the rear end side of the opposite side in the direction of movement of the cooling body is 1 mm or more.
, a method for producing an ultra-quenched metal ribbon.