JPH04364205A - Apparatus and method for producing fe soft magnetic alloy strip - Google Patents

Abstract

PURPOSE:To decrease the fluctuations in surface roughness and to provide a high saturation magnetic flux density and high magnetic permeability in combination and to improve mechanical strength and thermal stability by diagonally disposing the tip of a nozzle so as to face the rear side of a rotating direction with respect to the surface of a cooling roll consisting of an Fe alloy. CONSTITUTION:The cooling roll 10 is constituted of the alloys of the Fe systems, such as stainless steels and tool steels. The nozzle 20 is disposed in proximity to the peak of the roll 10 and is so provided that its tip inclines to the perpendicular so as to face the rear side of the rotating direction of the roll 10. Accumulation 40 of the melt 30 of the Fe soft magnetic alloy formed between the roll 10 and the nozzle 20 is increased in this way and the strip 50 can be stably drawn out of the accumulation fluctuating less in size. Then, the surface roughness on both surfaces of the strip 50 is diminished and uniformized and the strip adequate for magnetic heads, etc., is obtd.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for continuously producing Fe-based soft magnetic alloy ribbons used as materials for magnetic heads and transformers, for example.

0002

2. Description of the Related Art As an apparatus for continuously producing thin strips (ribbons) of amorphous alloys, a so-called single roll method shown in FIG. 5 is known. This is done by spraying molten metal 3 from a nozzle 2 placed close to the top of a cooling roll 1 made of Cu while rotating it at high speed.
The molten metal 3 is rapidly cooled and solidified on the surface of the cooling roll 1, and is drawn out in a band shape in the rotational direction of the cooling roll 1.

In the case of the apparatus shown in FIG. 5, the nozzle 2 is provided almost vertically at the top of the cooling roll 1;
The distance between the tip and the surface of the cooling roll 1 is set to about 1 mm or less.

The molten metal 3 projected from the nozzle 2 forms a substantially stationary puddle 4 between the tip of the nozzle 2 and the surface of the cooling roll 1. As it rotates, the molten metal 3 is drawn out from the pool 4, cooled on the surface of the cooling roll 1, and solidified into a strip, thereby forming a continuous ribbon 5. There is.

[0005]

By the way, the soft magnetic alloy used as the material for the magnetic head is particularly required to have a sufficiently flat surface, that is, a sufficiently small surface roughness. The surface roughness of the ribbon produced by the conventional apparatus is not necessarily small enough to be used in audio magnetic heads, and therefore there is a demand for the development of an apparatus for manufacturing alloy ribbon that can make the surface smoother. ing.

By the way, the following characteristics are generally required for soft magnetic alloys used in magnetic heads, transformers, choke coils, etc. (1) High saturation magnetic flux density. ■High magnetic permeability. ■Have low coercive force. ■It is easy to obtain a thin shape.

[0007] Also, for magnetic heads, the above
In addition to the properties described above, the following properties are required from the viewpoint of wear resistance. ■High hardness.

[0008] Therefore, when manufacturing soft magnetic alloys or magnetic heads, material research is being conducted on various alloy systems from these viewpoints.

[0009] Against this background, the present inventors first
A patent application was filed on April 24, 1990 for a high saturation magnetic flux density Fe-based soft magnetic alloy that satisfies the above requirements in Japanese Patent Application No. 108308/1990.

Another alloy related to this patent application was a high saturation magnetic flux density alloy characterized by having a composition represented by the following formula. (Fe1-a Co a) b Bx Ty T'z where T is one or more elements selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo, and W, and , Zr, Hf, or both, and T' is C
One or more elements selected from the group consisting of u, Ag, Au, Ni, Pd, and Pt, a≦0.05, b
≦92 atom%, x=0.5-16 atom%, y=4-10
atomic %, z=0.2 to 4.5 atomic %.

[0011] Another alloy according to the above patent application is a high saturation magnetic flux density alloy characterized by having a composition represented by the following formula. Fe b Bx Ty T'z However, T is Ti, Zr, Hf, V, Nb, Ta, Mo, W
T' is one or more elements selected from the group consisting of Zr, Hf, or both;
is one or more elements selected from the group consisting of Cu, Ag, Au, Ni, Pd, and Pt, b≦92 at%, x=0.5 to 16 at%, y=4 to 10 atomic%, z
=0.2 to 4.5 at%.

Furthermore, the present inventors have previously filed a patent application for an alloy having the composition shown below as an advanced alloy of the above-mentioned alloy.

One of the alloys related to this patent application was a high saturation magnetic flux density alloy characterized by having a composition represented by the following formula. (Fe1-a Q a)b Bx Tywhere Q is Co,
Either or both of Ni, T is Ti, Zr
, Hf, V, Nb, Ta, Mo, and one or more elements selected from the group consisting of W, and Zr, Hf
Contains either or both, a≦0.05, b≦93
x=0.5 to 8 atom%, y=4 to 9 atom%.

[0014] Another alloy according to the patent application is a high saturation magnetic flux density alloy characterized by having a composition represented by the following formula. Fe b Bx Ty where T is Ti, Zr, Hf, V, Nb, Ta, Mo, W
is one or more elements selected from the group consisting of, and contains either or both of Zr and Hf, and b≦
93 atom%, x=0.5-8 atom%, y=4-9 atom%
It is.

As described above, the present inventors have developed various Fe-based soft magnetic alloys having the above-mentioned compositions. Using these alloys, the manufacturing apparatus shown in FIG. It was found that a thin ribbon of the same type can be manufactured, and the present invention was achieved.

The present invention was made in view of the above circumstances, and it reduces the variation in surface roughness on both sides of the ribbon, has both high saturation magnetic flux density and high magnetic permeability, and has high mechanical strength and high magnetic permeability. It is an object of the present invention to provide a manufacturing apparatus and a manufacturing method that can provide a Fe-based soft magnetic alloy ribbon having thermal stability.

[0017]

[Means for Solving the Problem] In order to solve the above problem, the invention as set forth in claim 1 includes a cooling roll that is driven to rotate, a cooling roll that is arranged close to the cooling roll with its tip facing the surface of the cooling roll, and a and a nozzle for spraying a molten metal of a Fe-based soft magnetic alloy onto the surface of a cooling roll so that the molten metal is cooled on the surface of the cooling roll and drawn out in a band shape in the rotational direction of the cooling roll. In the soft magnetic alloy ribbon manufacturing apparatus, at least the outer circumferential surface of the cooling roll is made of an Fe-based alloy, and the nozzle is inclined with respect to the vertical so that its tip faces toward the rear in the rotational direction of the cooling roll. It is arranged close to the top of the cooling roll.

[0018] In order to solve the above problem, the invention as set forth in claim 2 injects Fe-based soft magnetic material onto the surface of a rotationally driven cooling roll from a nozzle arranged such that its tip faces the surface of the cooling roll. A method for producing a Fe-based soft magnetic alloy ribbon by spraying a molten alloy onto the surface of a cooling roll to form a strip and drawing the molten metal in the rotational direction of the cooling roll, wherein at least the outer peripheral surface is made of an Fe-based alloy. The nozzle is arranged close to the top of the cooling roll toward the rear side in the direction of rotation, and the molten metal is sprayed onto the surface of the cooling roll from the front end of the nozzle.

In order to solve the above problem, the invention described in claim 3 provides a method for producing a Fe-based soft magnetic alloy ribbon according to claim 2, in which a Fe-based soft magnetic alloy is sprayed from a nozzle onto a cooling roll. The present invention is characterized in that a molten Fe-based soft magnetic alloy having a composition represented by the following formula is used as the molten metal. (Fe1-a Co a) b Bx Ty T'z where T is one or more elements selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo, and W, and , Zr, Hf, or both, and T' is C
One or more elements selected from the group consisting of u, Ag, Au, Ni, Pd, and Pt, a≦0.05, b
≦92 atom%, x=0.5-16 atom%, y=4-10
%, z = 4.5 atomic % or less.

[0020] In order to solve the above problem, the invention described in claim 4 provides a method for producing a Fe-based soft magnetic alloy ribbon according to claim 2, in which the Fe-based soft magnetic alloy is sprayed from a nozzle onto a cooling roll. The present invention is characterized in that a molten Fe-based soft magnetic alloy having a composition represented by the following formula is used as the molten metal. Fe b Bx Ty T'z However, T is Ti, Zr, Hf, V, Nb, Ta, Mo, W
T' is one or more elements selected from the group consisting of Zr, Hf, or both;
is one or more elements selected from the group consisting of Cu, Ag, Au, Ni, Pd, and Pt, b≦92 at%, x=0.5 to 16 at%, y=4 to 10 atomic%, z
=4.5 atomic % or less.

[0021] In order to solve the above problem, the invention described in claim 5 provides a method for manufacturing a Fe-based soft magnetic alloy ribbon according to claim 2, in which a Fe-based soft magnetic alloy is sprayed from a nozzle onto a cooling roll. As the molten metal, a molten Fe-based soft magnetic alloy having a composition represented by the following formula is used. (Fe1-a Q a)b Bx Tywhere Q is Co,
Either or both of Ni, T is Ti, Zr
, Hf, V, Nb, Ta, Mo, and one or more elements selected from the group consisting of W, and Zr, Hf
Contains either or both, a≦0.05, b≦93
x=0.5 to 8 atom%, y=4 to 9 atom%.

[0022] In order to solve the above problem, the invention described in claim 6 provides a method for producing a Fe-based soft magnetic alloy ribbon according to claim 2, in which the Fe-based soft magnetic alloy is sprayed from a nozzle onto a cooling roll. As the molten metal, a molten Fe-based soft magnetic alloy having a composition represented by the following formula is used. Fe b Bx Ty where T is Ti, Zr, Hf, V, Nb, Ta, Mo, W
is one or more elements selected from the group consisting of, and contains either or both of Zr and Hf, and b≦
93 atom%, x=0.5-8 atom%, y=4-9 atom%
It is.

[0023]

[Operation] In the device of the present invention, the tip of the nozzle is faced obliquely to the surface of the cooling roll so that it faces backward in the direction of rotation, so the conventional device has a configuration in which the nozzle faces straight to the cooling roll. Compared to this, the puddle formed between the nozzle tip and the cooling roll is larger. Then, the molten metal is drawn out from the pool by the rotation of the cooling roll to form a ribbon, and at this time, the larger the volume of the pool, the smaller the actual volume change,
Therefore, the molten metal is drawn out more stably than in the case where the pool is small, thereby improving the surface roughness of the formed ribbon. As a result, a Fe-based soft magnetic ribbon suitable for use in magnetic heads is obtained.

Furthermore, since a molten metal of a soft magnetic alloy with a specific composition is used, the Fe-based soft magnetic alloy exhibits high saturation magnetic flux density and high magnetic permeability, has high hardness, and is suitable for use in magnetic heads with excellent heat resistance. A thin strip is obtained.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to the drawings. FIGS. 1 and 2 show an embodiment of the apparatus of the present invention. The apparatus of this embodiment has approximately the same configuration as the conventional apparatus shown in FIG. , is a device that sprays molten metal 30 from a nozzle 20 disposed close to the top of the molten metal 30, rapidly cooling and solidifying the molten metal 30 on the surface of the cooling roll 10, and pulling it out in a band shape in the rotational direction of the cooling roll 10. .

The apparatus of this embodiment is different from the conventional apparatus in that the entire cooling roll 10 is made of an Fe-based alloy. That is, the cooling roll 10 is made of an Fe-based alloy such as stainless steel or tool steel. The reason why the cooling roll 10 is made of an Fe-based alloy is to improve the wettability with the Fe-based soft magnetic alloy, which is used as the molten metal 30 as will be described later. In this embodiment, the entire cooling roll 10 is made of an Fe-based alloy, but it goes without saying that only the outer peripheral portion of the cooling roll 10 may be made of the Fe-based alloy.

In the apparatus of this embodiment, as shown in FIG.
The rotation direction of the cooling roll 10 is reversed from that in FIG. 5, so that the manufactured ribbon 50 is pulled out to the left in FIG.

Further, the nozzle 20 is disposed close to the top of the cooling roll 10, and the nozzle 20 is inclined with respect to the vertical so that the tip thereof faces toward the rear side in the direction of rotation (to the right in FIG. 1). It is set in. The degree of inclination θ (see FIG. 2) of the nozzle 20 with respect to the vertical is set within a range not exceeding 40° for reasons described later.

The dimensions of each part of the nozzle 20 and the distance between it and the cooling roll 1 may be set as appropriate, but preferably, the dimension t1 of the slit of the nozzle 20 shown in FIG. 2 is 0.5 mm.
, the wall thickness t2 is 1.0 mm, and the distance l1 between the tangent passing through the top of the cooling roll 1 and the bottom of the nozzle 20 is 0.
It is preferable to set it to about 5 mm.

Further, the distance l2 between the bottom of the slit and the tangent line is l2=l1+t2sinθ, and the distance l3 between the top of the slit and the tangent line is l3=l1+t2sinθ.
1+(t1+t2) sin θ, so as mentioned above, t1=0.5mm, t2=1.0mm, l1=0.5m
m, and when θ=40°, l2≒1.14m
m, l3≈1.46 mm.

Next, the molten metal 3 is sprayed onto the cooling roll 10.
As 0, a molten Fe-based soft magnetic alloy having a composition shown in the following formula can be used. (Fe1-a Co a) b Bx Ty T'z where T is one or more elements selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo, and W, and , Zr, Hf, or both, and T' is C
One or more elements selected from the group consisting of u, Ag, Au, Ni, Pd, and Pt, a≦0.05, b
≦92 atom%, x=0.5-16 atom%, y=4-10
atomic %, z = 4.5 atomic % or less.

Further, as the molten metal 30, a molten Fe-based soft magnetic alloy having a composition represented by the following formula can be used. Fe b Bx Ty T'z However, T is Ti, Zr, Hf, V, Nb, Ta, Mo, W
T' is one or more elements selected from the group consisting of Zr, Hf, or both;
is one or more elements selected from the group consisting of Cu, Ag, Au, Ni, Pd, and Pt, b≦92 at%, x=0.5 to 16 at%, y=4 to 10 atomic%, z
=4.5 atomic % or less.

Further, as the molten metal 30, a molten Fe-based soft magnetic alloy having a composition represented by the following formula can be used. (Fe1-a Q a)b Bx Tywhere Q is Co,
Either or both of Ni, T is Ti, Zr
, Hf, V, Nb, Ta, Mo, and one or more elements selected from the group consisting of W, and Zr, Hf
Contains either or both, a≦0.05, b≦93
% by atom, x=0.5 to 8 atom%, and y=4 to 9 atom%.

Further, as the molten metal 30, a molten Fe-based soft magnetic alloy having a composition represented by the following formula can be used. Fe b Bx Ty where T is Ti, Zr, Hf, V, Nb, Ta, Mo, W
is one or more elements selected from the group consisting of, and contains either or both of Zr and Hf, and b≦
93 atom%, x=0.5-8 atom%, y=4-9 atom%
It is.

The Fe-based alloy produced according to the present invention can be obtained by rapidly cooling an amorphous alloy having the above composition or a crystalline alloy containing an amorphous phase from a molten metal, and heating it to form fine crystals. It can usually be obtained by a heat treatment process that forms grains. In the molten alloy 30, the cooling roll 1
In order to easily obtain an amorphous phase after quenching at zero, it is necessary to contain either Zr or Hf, which has a high ability to form an amorphous phase. Further, a part of Zr and Hf can be replaced with Ti, V, Nb, Ta, Mo, and W among other group 4A to 6A elements. The reason why Cr was not included here is that Cr has an inferior ability to form an amorphous state compared to other elements.

B is thought to have the effect of increasing the amorphous formation ability of the alloy used in the present invention, and the effect of suppressing the formation of compound phases that adversely affect magnetic properties in the heat treatment process, and for this reason, the addition of B is required. Similar to B, A1, Si, C, P, etc. are also commonly used as amorphous forming elements, and the addition of these elements can be considered to be the same as the present invention.

As described above, the high saturation magnetic flux density F used in the present invention
We have explained the reasons for limiting the alloying elements contained in the e-based soft magnetic alloy, but in order to improve corrosion resistance with elements other than these,
It is also possible to add Cr, Ru and other platinum group elements, and if necessary, Y, rare earth elements, Zn, C
d, Ga, In, Ge, Sn, Pb, As, Sb, Bi
Magnetostriction can also be adjusted by adding elements such as , Se, Te, Li, Be, Mg, Ca, Sr, and Ba. In addition, unavoidable impurities such as H, N, O, and S may be considered to have the same composition as the high saturation magnetic flux density Fe-based soft magnetic alloy used in the present invention even if they are contained to the extent that the desired characteristics are not deteriorated. Of course you can.

[0038] The amount b of Fe and Co in the molten Fe-based soft magnetic alloy used in the present invention is 92 atomic % or less. This is because high magnetic permeability cannot be obtained if b exceeds 92 atom %, but in order to obtain a saturation magnetic flux density of 10 kG or more, b is more preferably 75 atom % or more. In addition, in a molten alloy that does not contain the element T'z, Fe
, Ni, and Co are 93 atomic % or less.

Furthermore, the present inventors conducted research on a heat treatment method for a high saturation magnetic flux density Fe-based soft magnetic alloy, and obtained the results shown in FIG. FIG. 6 shows the results of measuring the magnetic permeability of a soft magnetic alloy sample having a composition of Fe88Cu1B3Zr8 after being heated to 650° C. for 1 hour and then cooled at various cooling rates.

[0040] The results of this study revealed that magnetic permeability can be significantly increased at a cooling rate of 100°C/min or more. Therefore, T'z could be reduced to 4.5 atomic % or less.

Next, a case will be described in which a Fe-based soft magnetic alloy ribbon is manufactured using the apparatus shown in FIG.

When the cooling roll 10 is rotated at high speed in the direction of arrow A shown in FIG. 1 and the molten metal of the alloy having the above composition is spouted from the nozzle 20, the molten alloy flows through the cooling roll while forming a pool 40 at the top of the cooling roll 10. 10 to obtain a ribbon 50. The ribbon 50 is mostly composed of a non-uniform amorphous phase.

[0043] Here, the outer peripheral surface of the cooling roll 10 is made of Fe.
The thin strip 50 is smoothly fed out from the cooling roll 10 because it has good wettability with the Fe-based soft magnetic alloy. On the other hand, if a cooling roll made of a material other than Fe-based alloy such as Cu is used, the molten metal will scatter during ejection, making it difficult to produce a ribbon with a good shape, which is not preferable.

[0044] Here, the pool 40 formed on the cooling roll 10 is formed to a sufficient size, so that the ribbon 50 is drawn out from this large pool 40. If the pool 40 is sufficiently large as described above, there will be little variation in the size of the pool 40, so that a ribbon 50 with a uniform thickness can be obtained.

For the ribbon 50 thus obtained, 50
If an annealing treatment is performed in which the ribbon is heated to 0 to 620°C and then slowly cooled, the non-uniform amorphous phase of the ribbon 50 will crystallize, resulting in the creation of many regions where it is easy to partially crystallize, resulting in non-uniform nucleation. In this case, the resulting structure becomes finer, resulting in a diameter of 100 to 200
It becomes a fine crystal structure of about angstroms. As a result, it is possible to obtain a Fe-based soft magnetic alloy ribbon that exhibits excellent soft magnetic properties with high saturation magnetic flux density and magnetic permeability, and also has high hardness and excellent heat resistance.

Here, FIG. 3 shows actual measurement data showing the relationship between the inclination angle θ of the nozzle 20 and the surface roughness Rz, where the horizontal axis is the inclination angle θ of the nozzle 20, and the vertical axis is the inclination angle 0°. It represents the ratio Rz/Rz0 of the surface roughness Rz when the nozzle 20 is tilted to the surface roughness Rz0 when the nozzle 20 is tilted. From Fig. 3, the larger the inclination angle θ, the greater the surface roughness Rz.
It can be seen that the surface tends to become smaller, that is, the surface becomes flatter. Note that the calculated values of the surface roughness Rz0 and Rz are obtained by measuring the ten-point average roughness specified in JISB0601 using a stylus type surface roughness meter.

The reason why the surface roughness Rz is reduced by tilting the nozzle 20 in this way is that the nozzle 20
Pool (paddle) formed between the tip and cooling roll 1
40 is larger than that in the case where the nozzle 20 is not tilted. Therefore, minute volume fluctuations in the pool 40 caused by the molten metal 30 being drawn out from the pool 40 are substantially reduced, and the molten metal 30 is This is thought to be due to stable withdrawal.

Note that the lowermost end of the nozzle 20 and the cooling roll 1
When the distance l1 between the two and The inclination angle θ must be set within a range of not exceeding 40° because it flows down to the rear side in the transfer direction of the cooling roll 10 and no pool 40 is formed.

Furthermore, when the nozzle 20 is inclined so that its tip faces forward in the rotational direction of the cooling roll 10, a large pool 40 is not formed, and therefore, in that case, the surface roughness is improved. It does not have the same effect.

On the other hand, FIG. 4 shows the effect of the distance between the tip of the nozzle 20 and the surface of the cooling roll 10 on the surface roughness when the inclination angle θ of the nozzle 20 is constant. . In FIG. 4, the horizontal axis represents the distance between the tip of the nozzle 20 and the surface of the cooling roll 10 (the above l1 dimension)
, and the vertical axis represents the surface roughness Rz, Rm of the formed ribbon 5.
It is ax. Rmax is the maximum surface roughness measured by a stylus type surface roughness meter. From this figure, the l1 dimension is set to 0.
Surface roughness Rz when set within the range of 3 to 0.5 mm
, Rmax is the smallest, so the l
It is preferable to set a value of 1 within that range. In that case, when using the above nozzle 20 and setting θ=40°, l2=0.94 to 1.14 mm, l3≈1.
Since the distance is 26 to 1.46 mm, the distance between the slit of the nozzle 20 and the cooling roll 10 is substantially larger than in the conventional case, which is usually 1 mm or less.

By the way, Fe9 produced as described above
After holding the 1Hf7B2 alloy ribbon at 550° C. for 1 hour, it was slowly cooled and annealed, and as a result, a Fe-based soft magnetic alloy ribbon could be obtained.

The obtained Fe-based soft magnetic alloy ribbon exhibited a saturation magnetic flux density of 1.6 kG and a magnetic permeability of 18,000 at 1 kHz, and was found to have excellent soft magnetic properties. In addition, this Fe-based soft magnetic alloy ribbon has a Vickers hardness of 1300D.
It was revealed that the material exhibited PN and had sufficient hardness for use in magnetic heads.

As explained above, the surface roughness on both sides of the thin ribbon 50 can be made sufficiently small, and therefore, the device of this embodiment is particularly applicable to thin sheets of soft magnetic alloy as a material for audio magnetic heads. It is suitable as an apparatus for manufacturing belts.

[0054]

[Effects of the Invention] As explained above, in the manufacturing apparatus of the present invention, since the nozzle is inclined toward the rear side in the rotational direction of the cooling roll, the pool formed between the cooling roll and the nozzle is enlarged. Since the ribbon can be pulled out from this large pool, the ribbon can be stably pulled out from the pool whose size does not fluctuate much. As a result, the surface roughness on both sides of the manufactured ribbon can be made sufficiently small and uniform.

Furthermore, since the molten metal used is a molten metal of a Fe-based soft magnetic alloy with a specific composition, the obtained ribbon has a high saturation magnetic flux density, excellent magnetic permeability, and high hardness, so it is suitable for magnetic heads. A ribbon of Fe-based soft magnetic alloy suitable for various purposes is obtained.

Furthermore, according to the method of the present invention, since the manufacturing apparatus having the above-mentioned configuration is used, a Fe-based soft magnetic alloy ribbon having low surface roughness, excellent soft magnetic properties, and suitable for use in magnetic heads can be manufactured. be able to.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a cooling roll and a nozzle showing an embodiment of the apparatus of the present invention.

FIG. 2 is an explanatory diagram showing an inclination angle of a nozzle showing an embodiment of the device of the present invention.

FIG. 3 is a diagram showing the relationship between nozzle inclination angle and surface roughness.

FIG. 4 is a diagram showing the relationship between the distance between the nozzle and the cooling roll and the surface roughness.

FIG. 5 is a sectional view showing a conventional cooling roll and nozzle.

FIG. 6 is a graph showing the relationship between cooling rate and magnetic permeability.

[Explanation of symbols]

10 Cooling roll 20 Nozzle 30 Molten metal 40 Accumulation 50 thin strip

Claims (6)

[Claims] Claims: 1. A cooling roll that is rotationally driven; and a cooling roll that is disposed close to the surface of the cooling roll with its tip facing the surface of the cooling roll; In this apparatus, at least the outer circumferential surface of the cooling roll is made of Fe-based alloy. The Fe-based soft magnetic alloy is characterized in that the nozzle is arranged close to the top of the cooling roll in a state where the tip thereof is inclined with respect to the vertical so that the tip thereof faces toward the rear side in the rotational direction of the cooling roll. Thin strip manufacturing equipment. [Claim 2] On the surface of the rotationally driven cooling roll,
Fe-based soft magnetic alloy molten metal is sprayed from a nozzle whose tip is arranged so as to face the surface of the cooling roll, and the molten metal is cooled on the surface of the cooling roll, formed into a band shape, and drawn out in the rotational direction of the cooling roll. In the method for producing a soft magnetic alloy ribbon, at least the outer peripheral surface is made of Fe.
The method is characterized in that a cooling roll made of a base alloy is used, the nozzle is arranged close to the top of the cooling roll toward the rear side in the direction of rotation, and the molten metal is sprayed from the front end of the nozzle onto the surface of the cooling roll. A method for producing a Fe-based soft magnetic alloy ribbon. 3. In the method for producing a Fe-based soft magnetic alloy ribbon according to claim 2, the molten Fe-based soft magnetic alloy that is sprayed from the nozzle onto the cooling roll is an Fe-based soft magnetic alloy having a composition represented by the following formula. A method for producing a Fe-based soft magnetic alloy ribbon, characterized by using a molten magnetic alloy. (Fe1-a Co a) b Bx Ty T'z where T is one or more elements selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Mo, and W, and , Zr, Hf, or both, and T' is C
One or more elements selected from the group consisting of u, Ag, Au, Ni, Pd, and Pt, a≦0.05, b
≦92 atom%, x=0.5-16 atom%, y=4-10
%, z = 4.5 atomic % or less. 4. In the method for producing a Fe-based soft magnetic alloy ribbon according to claim 2, the Fe-based soft magnetic alloy molten metal sprayed from the nozzle onto the cooling roll is an Fe-based soft magnetic alloy having a composition represented by the following formula. A method for producing a Fe-based soft magnetic alloy ribbon, characterized by using a molten metal of the alloy. Fe b Bx Ty T'z However, T is Ti, Zr, Hf, V, Nb, Ta, Mo, W
T' is one or more elements selected from the group consisting of Zr, Hf, or both;
is one or more elements selected from the group consisting of Cu, Ag, Au, Ni, Pd, and Pt, b≦92 at%, x=0.5 to 16 at%, y=4 to 10 atomic%, z
=4.5 atomic % or less. 5. In the method for producing a Fe-based soft magnetic alloy ribbon according to claim 2, the molten Fe-based soft magnetic alloy that is sprayed from the nozzle onto the cooling roll is an Fe-based soft magnetic alloy having a composition represented by the following formula. A method for producing a Fe-based soft magnetic alloy ribbon, characterized by using a molten metal of the alloy. (Fe1-a Q a)b Bx Tywhere Q is Co,
Either or both of Ni, T is Ti, Zr
, Hf, V, Nb, Ta, Mo, and one or more elements selected from the group consisting of W, and Zr, Hf
Contains either or both, a≦0.05, b≦93
x=0.5 to 8 atom%, y=4 to 9 atom%. 6. In the method for producing a Fe-based soft magnetic alloy ribbon according to claim 2, the Fe-based soft magnetic alloy molten metal sprayed from the nozzle onto the cooling roll is an Fe-based soft magnetic alloy having a composition represented by the following formula. A method for producing a Fe-based soft magnetic alloy ribbon, characterized by using a molten metal of the alloy. Fe b Bx Ty where T is Ti, Zr, Hf, V, Nb, Ta, Mo, W
is one or more elements selected from the group consisting of, and contains either or both of Zr and Hf, and b≦
93 atom%, x=0.5-8 atom%, y=4-9 atom%
It is.