JP3373316B2 - Winding method of rapidly solidified ribbon - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] FIELD OF THE INVENTION The present invention relates to liquid metals and
Moving cooling of the alloy (hereinafter referred to as "molten metal")
Rapid solidification on the substrate to obtain thin strips of metal and alloy
In the liquid quenching method, rapid solidification ribbon (hereinafter, “ribbon”)
That. ) Online after peeling from the cooling substrate
On how to take. [0002] 2. Description of the Related Art A liquid quenching method for producing a ribbon is used.
The molten alloy on one high-speed rotating cooling roll
So-called single-roll method to obtain a ribbon by feeding
Supplying molten metal between cooling rolls rotating at high speed
And the twin-roll method. A method for forming a ribbon by a liquid quenching method is described.
And using a single roll quenched and solidified ribbon manufacturing apparatus shown in FIG.
An example will be described. In FIG. 5, molten metal 1
Is a tundish so that its level is constant
2 is hot water. On the bottom wall of this tundish 2
The tuyere brick 3 is provided.
The inter-nozzle 4 and the nozzle holder 5 are connected. This
These tuyere bricks 3, intermediate nozzles 4 and nozzle holders
5, a hole is provided, and this hole is connected to
The hot water path 6 and the enlarged internal space 12 in the nozzle holder
You. The tip of the nozzle holder 5 has a nozzle tip 7.
Is installed inside the nozzle tip 7.
A girder nozzle slit 8 communicates with the molten metal flow path 6. The enlarged space 12 in the nozzle holder, the nozzle
The tip 7 and the nozzle slit 8 are shown in FIG.
You. The enlarged internal space is a nozzle to obtain a wide ribbon.
The part where the molten metal flow path 6 is expanded in the holder 5
The slit 8 is used for jetting the molten metal provided in the nozzle tip 7.
The opening of. When the stopper 9 is raised,
The molten metal 1 in the dish 2 passes through the molten metal flow path 6.
Flows out from the nozzle slit 8 toward the cooling roll 10
You. At this time, according to the static pressure of the molten metal in the tundish 2
Flows out of the nozzle slit 8 toward the cooling roll 10
The flow rate of the molten metal is controlled. Nozzle slit 8
The molten metal flowing out of the cooling roll 10
When cooled, the ribbon 11 is formed. Note that in FIG.
In order to facilitate understanding of the whole, the cooling roll 10 is
Drawn at a scale greater than the scale of Tundish 2.
ing. [0006] The ribbon obtained by these liquid quenching methods
To take up on-line after peeling off from cooling substrate
Various methods have been proposed so far. Basic
The rotation of this take-up roll
The winding method is adopted. For example, the magnetism
In the case of a thin ribbon having
Winding with a permanent magnet embedded in the surface as proposed
Using a re-roll, the ribbon is caught by the force of a magnet,
This is a method of winding by rotation of a rear winding roll. In this winding method, rapid cooling is performed on a rotating cooling substrate.
After solidification, it has magnetism that rotates while closely contacting the cooling substrate surface
The thin ribbon with a sharp high-pressure gas jet
Then, the tip of the strip after peeling is the same as the rotating cooling substrate.
A winding roll with a magnetic surface rotating at a peripheral speed equal to or higher than
After magnetically adsorbing to the tape, it is wound continuously. Soshi
In the above publication, rare-earth cobalt is used as a winding roll.
Uses rolls with permanent magnets such as magnets embedded in the surface
It is disclosed that it is possible. [0008] The present inventors, for example, in the single roll method
When manufacturing ribbons, wind the resulting ribbons online
For this reason, winding of a ribbon was attempted by this method. The result
As a result, when the thickness of the ribbon is 30 μm or less, it can be wound up.
Good quality ribbon without quality problems
Was. [0009] SUMMARY OF THE INVENTION
When the material becomes thicker than 30μm, it is rolled up
Was possible, but the quality of the obtained ribbon was lower.
The problem described above occurred. In other words, the magnetic properties and
The properties were degraded in mechanical properties such as properties.
If the thickness of the ribbon is as small as 30 μm or less,
The temperature of the ribbon at the time of taking is as low as about 100 ° C or less.
On the other hand, when the thickness of the ribbon exceeds 30 μm,
The temperature of the ribbon at the time of
This is because it will affect the sound. In particular, when the ribbon is an amorphous alloy,
The properties of morphus alloys are sensitive to heat, and when exposed to high temperatures
It is easily crystallized and the characteristics deteriorate. Large strip thickness
The temperature of the ribbon in the wound state is high
It becomes cold at a high temperature due to the thicker plate
Peels off from the roll, and after winding
This is because the subsequent ribbon is hardly cooled. Thick
Insufficient cooling of the ribbon as described above that occurs when the ribbon is wound
Good problem is to use a take-up roll with a magnetic surface
Is not a problem that occurs only in the
Invariant question in any method of winding by rotation
It is a title. An object of the present invention is to provide a thin film having a thickness exceeding 30 μm.
Even in the production of strips, the properties of thin strips may deteriorate.
To provide a winding method for thin ribbons
You. [0012] The present invention provides the following:
This is the gist. That is, on the moving cooling substrate
Rapidly solidified ribbon obtained by ejecting liquid metals and alloys
In a method of winding online, the cooling substrate and
At least one rotating secondary cooler between the winding device
A metal or alloy roll for cooling and quenching
The solidified ribbon is placed on the circumferential surface of the roll by the following relational expression:
The contact is made for a distance that satisfies (1), and then the quenching is performed.
Winding of rapidly solidified ribbon characterized by winding the solidified ribbon
How to take.   L (= L₁+ L_Two+ ... + L_n) ≧ 12 × t / t₀× λ₀/ Λ (cm) ... (1) Here, L is the contact distance between the secondary cooling roll and the rapidly solidified ribbon.
Grand total L₁Is the contact between the first secondary chill roll and the rapidly solidified ribbon
distance L_TwoIs the contact between the second secondary chill roll and the rapidly solidified ribbon
distance L_nIs the contact between the nth secondary chill roll and the rapidly solidified ribbon
distance t is the thickness of the rapidly solidified ribbon t₀Is the thickness of the rapidly solidified ribbon as a reference (= 40 μm) λ is the thermal conductivity of the secondary cooling roll used However, when using secondary cooling rolls of multiple materials,
Thermal conductivity of materials with good thermal conductivity λ₀Is the thermal conductivity of pure copper Hereinafter, the present invention will be described in detail. First,
The winding method of the present invention will be described with reference to FIG. Dissolution
The molten metal is transferred from the tundish 2 to a cooling substrate (see FIG.
Rule 10 ". Hereinafter, "cooling roll"
U. ) The thin ribbon 11 produced and supplied on the
In the winding method, the cooling roll 10 and the winding device 14
Between and rotate multiple, for example, copper or brass
Secondary cooling roll 17 made of metal and alloy having high thermal conductivity
So that the ribbon is in contact with the surface of these secondary cooling rolls 17.
After passing through so as to make contact, the support roller 16
Then, the ribbon 11 is wound by a winding roll. Mass production of ribbons
To do this, rotate it using the disk 15
11 cannot be wound by one take-up reel.
The spare take-up reel 13 '
Can be adopted. Thus, the ribbon 11 is heated
Circumference of secondary chill rolls made of highly conductive metals and alloys
The plate of the thin strip 11 is passed through by contacting the surface.
Even if the thickness exceeds 30 μm, the thin
It is possible to solve the problem of poor cooling of the ribbon at the time of band winding
It became. Total contact distance between the secondary cooling roll and the ribbon
The range of (L) depends on the thickness of the ribbon to be wound and the secondary cooling roll.
It is determined by the thermal conductivity, but satisfies the above formula (1)
Limited to the range. That is, the value on the right side of equation (1)
Is the thickness of the strip to be manufactured and the secondary cooling roll used for manufacturing
Can be determined by the material of this, the determined value,
In order to suppress the problem of poor cooling of the ribbon when winding the ribbon
The minimum required contact distance between the secondary cooling roll and the ribbon.
It is total. Secondary cooling to be adopted in actual production
The total value of the contact distance between the roll and the ribbon should be
It is preferable to set this value or more. However, not very large
Value from the viewpoint of manufacturing cost and manufacturing space, etc.
It is not advisable to set a value larger than necessary
Not good. Good for adoption in actual manufacturing
The range will be described in detail in Examples. Next, the contact distance between the secondary cooling roll and the ribbon is determined.
The reasons for limiting the total (L) as described above are described.
You. The present inventors have proposed a problem of poor cooling of a ribbon at the time of winding the ribbon.
Secondary cooling between the cooling roll and the winding device to eliminate
Rolls are arranged as shown in Fig. 1 and three secondary cooling
By changing the relative position of the roll, individual secondary
Winding experiments were conducted by changing the contact distance between the cooling roll and the ribbon.
Was. As an experimental condition, first, the thickness of the ribbon was set to 4
0 μm, and the material of the secondary cooling roll was pure copper. Soshi
Then, the magnetic properties (iron loss value) of the obtained ribbon were examined, and the individual
Contact distance between the secondary cooling roll and the ribbon and three secondary cooling
The relationship between the total contact distance between the roll and the ribbon and the magnetic properties
I organized it. As a result, the magnetic characteristics are three secondary cooling rows.
And the total contact distance between the ribbon and the ribbon.
If the total length is 12 cm or more, deterioration in magnetic properties is recognized.
Eliminates the problem of poor cooling of the ribbon when winding the ribbon
It turns out that it is possible. Further, the material of the secondary cooling roll is pure copper.
And changing the thickness of the ribbon,
Critical value of this total that can solve the cooling failure problem (hereinafter,
It is called "critical total value". ) Is proportional to the increase in the thickness of the ribbon
Then it gets bigger. That is, at an arbitrary plate thickness (t)
The critical total value is the sheet thickness relative to the critical total value at 40 μm.
(T / t)₀. Where t₀Is the standard ribbon thickness of 40
μm), 12 × t / t₀(Cm)
Revealed. Further, the thickness of the ribbon was kept at 40 μm,
Critical total when the next cooling roll material is 6/4 brass
The value is based on the critical total value when the secondary cooling roll is pure copper.
It has been found that it is only necessary to consider the decrease in the thermal conductivity. You
That is, the ratio of the thermal conductivity between 6/4 brass and pure copper is 0.3
Since it is 2, 6/4 brass is used as a secondary cooling roll.
The critical total value at a ribbon thickness of 40 μm is 12 臨界
0.32 = 38 (cm). The material of the secondary cooling roll is other
However, in principle, the critical total value can be summarized by the ratio of thermal conductivity.
It is thought that it can come. Therefore, as a secondary cooling roll
The critical total value for the thermal conductivity (λ) of the material used is pure
Critical total value when using secondary cooling rolls made of copper
The change in thermal conductivity (λ₀/ Λ. Where λ₀Is pure copper
Thermal conductivity), that is, 12 × λ₀At / λ
Can be organized. From the above experimental results, the thickness and the thickness of the ribbon
Even if the material of the next cooling roll changes, the critical total
It is considered that the expression can be arranged on the right side of the equation (1). Therefore, two
The total (L) of the contact distance between the next cooling roll and the ribbon
Limited by equation (1). In the present invention, for example, a plurality of secondary cooling
When using a roller, the contact distance between the secondary cooling roll and the ribbon
If the total satisfies the expression (1), the individual secondary cooling
The contact distance with the ribbon may be different between the tools. Ma
In addition, the number of secondary cooling rolls is also particularly limited.
If there are multiple cooling rolls, their materials
They can be different. For example, as shown in FIG.
The case where the number is L₁+ L_TwoSatisfy the expression (1).
If you add₁, L_TwoDo not specify up to individual values of
No. In other words, in FIG.
By changing the position relative to the roll, L₁, L_Two
Changes even if the value of₁+ L_TwoSatisfy the expression (1).
It should just be. 2 (b), 2 (c) and 2 (d)
Is for the case of three secondary cooling rolls each
As shown in this figure, the diameter and relative position of the secondary
Even if it changes, L₁+ L_Two+ L_ThreeSatisfy the expression (1).
It should just be. Further, FIGS. 2E and 2F respectively show
The case where the number of secondary cooling rolls is 5 or 7 is shown.
However, the total contact distance between the secondary cooling roll and the ribbon
If formula (1) is satisfied, the diameter and relative size of the secondary cooling roll
Secondary cooling in different secondary cooling rolls with changing position
The contact distance between the roll and the ribbon may change. Also,
As shown in FIG. 2 (f), the individual rolls approach each other.
In each of the secondary cooling rolls,
The contact distance between the cooling roll and the ribbon can be increased.
You. Of course, the diameter and number of secondary cooling rolls are
It is preferable to set an appropriate value in terms of
No. Next, how to set the position of the secondary cooling roll
explain about. In Figure 1, the ribbon has already been secondary cooled
The roll is brought into good contact with the surface and transported.
The state shown is
For example, the configuration shown in FIG. That is, FIG.
(A) shows a state in which the winding of the ribbon is stable.
At the time of, the secondary cooling rolls 17, 17 ', 17 "
Each is in the initial position. Immediately after the winding of the ribbon has stabilized
Next, move the three secondary cooling rolls in the direction of the arrow
I do. Moving the three secondary cooling rolls, Fig. 3
As shown in (b), the ribbon contacts three secondary cooling rolls.
You can touch it. Furthermore, the central secondary cooling roll 1
If only 7 'is moved in the direction of the arrow, as shown in FIG.
State. The number of secondary cooling rolls
The secondary chill roll position is the same
It can be done in the same way. Conventionally, as shown in FIG.
The support roller 1 made of, for example, tool steel
6, the method of transporting a thin ribbon is disclosed in Japanese Utility Model Laid-Open No. 01-038.
No. 144 discloses this. Of course, in this case
The support roller was for forming a thin pass line
It was used to change the direction of transport,
Although not intended for secondary cooling of ribbons,
It is also conceivable that this may lead to the effect of secondary cooling of the ribbon. However, in order to form a thin ribbon pass line,
Placed for the purpose of changing the direction of transport
With the support roller, the contact distance with the ribbon is only a little,
Moreover, if the material used is intended to remove heat from the ribbon
Therefore, the thermal conductivity is low and
In fact, it does not work for secondary cooling of ribbons
won. The winding strip of the ribbon used in the method of the present invention.
For example, take-up roll and cooling when catching the leading edge of a ribbon
The distance between the rolls should be as close as possible without collision.
It is better to make it, for example, about 10 mm or less is preferable. However
To capture the leading edge of the ribbon and ensure stable winding.
, You can place at least a gas ejection nozzle
Cool the take-up roll so that only enough space can be secured
Keep away from rolls. Further, a winding roller which can be employed in the method of the present invention.
Tools such as rare earth cobalt magnets and samarium-cobalt
Rolls with embedded permanent magnets exposed on the surface
It is. In addition, magnetism is generated on the surface by the electromagnet method.
Rolls that are made to be raw may be used. As a method of forming a ribbon, a simple method is first described.
Although the case of the roll method has been described, the method of the present invention is, for example, as follows.
Supply molten alloy between a pair of high-speed rotating cooling rolls
Other liquid quenching methods such as the twin roll method to obtain thin ribbons
Applicable. In addition, preferable casting when forming a ribbon
The conditions and the like will be described in detail in Examples. [0031] EXAMPLES The present invention will be further described below based on examples.
explain.Example 1 Using the apparatus for manufacturing a single roll ribbon in air shown in FIG.
An experiment was conducted on the production of thin ribbons. The alloy used was Fe-
Si_6.5-B₁₂-C₁It was an amorphous alloy. casting
Nozzle opening shape of nozzle tip for jetting molten sample used for
Is a 1mm x 150mm slit between 2mm in the casting direction
The shape was such that two pieces were arranged in parallel with a gap. Also high frequency
The flow rate of the molten sample of the above alloy melted by the induction method is 50 kg
/ Min, and spray it onto the peripheral surface of a copper cooling roll
It was a band. The thickness of the ribbon should be
The control was performed by the surface speed of the cooling roll for each die. A diameter of 15 mm is provided between the cooling roll and the winding device.
Three cm rolls were prepared as secondary chill rolls.
All three secondary cooling rolls were made of pure copper. Open casting
Immediately after catching the end of the ribbon on the take-up roll,
The surface speed of the secondary cooling rolls is
The degree is set to be the same as the degree, and the individual
The secondary chill roll was moved. And 17, 17 ', 1
The distance the 7 "secondary chill roll contacts the ribbon, ie
L₁, L_Two, L_ThreeSo that each has a predetermined value.
Set the position of the cooling roll and continue winding the ribbon.
Was. The contact distance between the secondary cooling roll and the ribbon is
High-speed camera shot of each secondary cooling roll
I got it from the photo. The winding roll used had a surface of φ10 mm ×
A 6 mmt round bar-shaped samarium-cobalt is placed adjacent to each other.
200mm width and 60 diameter embedded with different magnetic poles
It was made of 0 mm aluminum. As a result, a good thin film is obtained at all charges.
Obi was obtained. The resulting ribbon is charged with any charge
The width was about 150 mm. The thickness of the ribbon is the weight of the ribbon.
Quantity, length, width and alloy density (7.26 g / cm^Three) Or
It was calculated from: In order to evaluate the magnetic properties of the ribbon,
Take a 200mm long sample every 20m in the direction,
Iron loss value (W_13/501.3 Tessler,
(Iron loss value at 50 Hz) was measured. The results obtained are shown in Table 1. 1-7
Shown in As an experimental result of the first charge, individual secondary cooling
Contact distance L between the roll and the ribbon₁, L_Two, L_ThreeIs it
Each of the sample Nos. As shown in FIG. Contact distance
The total L was 12 cm. The obtained ribbon thickness is 32μ
m, the contact distance between the secondary cooling roll and the ribbon
Of the critical total value is 10 cm calculated from the right side of equation (1).
The total contact distance L is larger than the critical total value.
Met. The iron loss value is 0.095 to 0.102 W / Kg.
It showed good values. 6 chips from the second charge to the seventh charge
The experimental results of the sample Nos. In Table 1 are shown in Table 1. Shown in 2-7
You. The total contact distance L between the secondary cooling roll and the ribbon is
Both charges are calculated using the right side of the equation (1).
It was more than the total critical value. Also, the iron loss value of the obtained ribbon
Is 0.115W / Kg or less for any charge
Value. [0037] [Table 1]From the above results, using a secondary cooling roll,
From the cooling roll to winding under the condition satisfying the formula (1)
Good iron loss value by secondary cooling of the ribbon between
It has been found that it is possible to produce a ribbon having the above. this
Cools the ribbon before winding by the secondary cooling roll
As a result, it was possible to eliminate the problem of poor cooling when winding the ribbon.
It is determined that [0039]Example 2 Using the apparatus for manufacturing a single roll ribbon in air shown in FIG.
Using two secondary cooling rolls between the reel and the winding device,
A five-charge ribbon production experiment was performed. Secondary cooling system used
The cooling rolls 17 and 17 'shown in FIG.
Were used. Both secondary cooling rolls are made of pure copper
, And each had a diameter of 30 cm. Start casting
Immediately after capturing the end of the ribbon on the take-up roll,
The surface speed of the secondary cooling roll, the surface speed of the cooling roll
3 and 17 and 17 in the manner shown in FIG.
And 17 'secondary chill rolls were moved. In addition, 17 ″
The secondary chill roll was left untouched. And 17, 1
7 'secondary cooling roll contact distance with the ribbon, respectively
L₁, L_TwoTo the specified value.
The position of the tape was set, and the winding of the ribbon was continued. secondary
How to find the contact distance between the cooling roll and the ribbon and other casting
The fabrication conditions were the same as in Example 1. As a result, a good thin film is obtained at all charges.
Obi was obtained. The resulting ribbon is charged with any charge
The width was about 150 mm. Calculate the thickness of the ribbon
In order to evaluate the iron loss value of
A 200 mm sample was taken. Calculation method of thin strip thickness
The method for measuring the iron loss value was the same as in Example 1. The obtained results are shown in Table 1. 8 to 1
It is shown in FIG. Total contact distance L between secondary cooling roll and ribbon
Is calculated using the right side of equation (1)
It was more than the critical sum issued. Also, the obtained ribbon
The iron loss value of each charge is 0.114 W / Kg or less.
Good values were shown below. From these results, a secondary cooling roll was used.
Winding from a cooling roll under conditions that satisfy equation (1)
Good heat loss by secondary cooling of the ribbon
It has been found that it is possible to produce a ribbon having a value. This
The secondary chill roll cools the ribbon before winding.
By this, when existing thin ribbon winding
It is determined that the cooling failure problem has been solved. [0043]Example 3 Using the apparatus for manufacturing a single roll ribbon in air shown in FIG.
Using one secondary cooling roll between the reel and the winding device
An experiment was conducted to manufacture a thin ribbon of a charge. Secondary cooling row used
The cooling roll 17 shown in FIG. two
The next cooling roll is made of pure copper and has a diameter of 30 cm.
Was. Start casting and take up the end of the ribbon
Immediately after capturing, the surface speed of the secondary cooling roll
The surface speed of the roll was set to be the same as that shown in FIG.
The 17 secondary cooling rolls were moved in a similar manner. 17 '
And the 17 "secondary chill roll was left intact.
And the distance that the 17 secondary cooling rolls contact the ribbon is 14
cm, set the position of the secondary cooling roll
The winding of the obi was continued. Contact distance between secondary cooling roll and ribbon
The method of finding the separation and other casting conditions are the same as in Example 1.
And As a result, a good width of about 150 mm
A ribbon was obtained. Calculate the ribbon thickness and evaluate the iron loss value of the ribbon.
For the sake of valuation, a length of 200 mm for every 20 m in the longitudinal direction
A sample was taken. Calculation method of ribbon thickness and iron loss value
Was measured in the same manner as in Example 1. The obtained results are shown in Table 1. 13
Show. The total contact distance L between the secondary cooling roll and the ribbon is set.
Critical value calculated using the right-hand side of equation (1)
It was more than the measured value (12 cm). Also, the obtained thin iron
The loss value is a good value of 0.094 to 0.101 W / Kg or less.
showed that. From these results, the secondary cooling roll was used.
Winding from a cooling roll under conditions that satisfy equation (1)
Good heat loss by secondary cooling of the ribbon
It has been found that it is possible to produce a ribbon having a value. This
The secondary chill roll cools the ribbon before winding.
This eliminates the problem of poor cooling when winding the ribbon.
It is judged that it is. [0048]Example 4 Using the apparatus for manufacturing a single roll ribbon in air shown in FIG.
Using three secondary cooling rolls between the reel and the winding device
An experiment was conducted to manufacture a thin ribbon of a charge. Secondary cooling row used
The cooling rolls 17, 17 ', and 1 shown in FIG.
7 "were used. The three secondary cooling rolls were 6 /
It was made of 4 brass and all had a diameter of 15 cm. Start casting and take up the end of the ribbon
Surface speed of three secondary chill rolls immediately after capturing
Is set to be the same as the surface speed of the cooling roll, and FIG.
17, 17 ', 17 "secondary cooling row
Moved. And secondary cooling of 17, 17 ', 17 "
Distance of contact of the roll with the ribbon, L₁, L_Two, L_ThreePlace
Set the position of each secondary cooling roll so that
Then, the winding of the ribbon was continued. Secondary cooling roll and thin
How to determine the contact distance of the belt and other casting conditions
Same as Example 1. As a result, the width of both charges is approximately
A good ribbon of 150 mm was obtained. Calculate the ribbon thickness,
Every 20m in the longitudinal direction to evaluate the iron loss value of the ribbon
A sample having a length of 200 mm was collected. Calculation of thin strip thickness
The method and the method of measuring the iron loss value were the same as in Example 1.
Was. The obtained results are shown in Table 1. 14 o
And 15. Total contact distance between secondary cooling roll and ribbon
Total L is calculated using the right side of equation (1) for each charge.
It was more than the critical total value calculated. Also obtained
The iron loss value of the ribbon is 0.104 W /
It showed a good value of not more than Kg. From these results, a secondary cooling roll was used.
Winding from a cooling roll under conditions that satisfy equation (1)
Good heat loss by secondary cooling of the ribbon
It has been found that it is possible to produce a ribbon having a value. This
This cools the ribbon before winding by the secondary cooling roll
As a result, the cold
It is determined that the rejection problem has been solved. [0053]Example 5 Using the apparatus for manufacturing a single roll ribbon in air shown in FIG.
Using two secondary cooling rolls between the reel and the winding device.
An experiment was conducted to manufacture a thin ribbon of a charge. Secondary cooling row used
The cooling rolls 17 and 17 'shown in FIG.
Two were used. Both secondary cooling rolls are 6/4 yellow
It was made of copper and all had a diameter of 30 cm. The casting is started, and the leading end of the ribbon is taken up by a winding roll.
Surface velocity of two secondary chill rolls immediately after capturing
Is set to be the same as the surface speed of the cooling roll, and FIG.
The secondary chill rolls 17 and 17 'were replaced as shown in
moved. In addition, the secondary cooling roll of 17 ″ is left as it is.
did. And the secondary cooling rolls 17 and 17 '
Contact distance, L₁, L_TwoIs set to a predetermined value.
Set the position of each secondary cooling roll to take up the ribbon
Continued. How to find the contact distance between the secondary cooling roll and the ribbon
The other casting conditions were the same as in Example 1. As a result, the width of both charges is approximately
A good ribbon of 150 mm was obtained. Calculate the ribbon thickness,
Every 20m in the longitudinal direction to evaluate the iron loss value of the ribbon
A sample having a length of 200 mm was collected. The thickness of the strip
Is the same as that of Example 1
And The obtained results are shown in Table 1. 16
And 17. Total contact distance between secondary cooling roll and ribbon
Total L is calculated using the right side of equation (1) for each charge.
It was more than the critical total value calculated. The resulting ribbon
Iron loss value is 0.115W / Kg or less for each charge
And a good value. From these results, a secondary cooling roll was used.
Winding from a cooling roll under conditions that satisfy equation (1)
Good heat loss by secondary cooling of the ribbon
It has been found that it is possible to produce a ribbon having a value. This
The secondary chill roll cools the ribbon before winding.
By this, when existing thin ribbon winding
It is determined that the cooling failure problem has been solved. [0058]Comparative Example 1 Using the apparatus for manufacturing a single roll ribbon in air shown in FIG.
Using three secondary cooling rolls between the reel and the winding device
An experiment was conducted to manufacture a thin ribbon of a charge. Secondary cooling row used
The cooling rolls 17, 17 ', and 1 shown in FIG.
Three 7 "pieces were used. All three secondary cooling rolls were made of pure copper
And all had a diameter of 15 cm. The casting is started, and the leading end of the ribbon is taken up by a winding roll.
Surface speed of three secondary chill rolls immediately after capturing
Is set to be the same as the surface speed of the cooling roll, and FIG.
17, 17 ', 17 "secondary cooling row
Moved. And secondary cooling of 17, 17 ', 17 "
Distance of contact of the roll with the ribbon, L₁, L_Two, L_ThreePlace
Set the position of each secondary cooling roll so that
Then, the winding of the ribbon was continued. Secondary cooling roll and thin
How to determine the contact distance of the belt and other casting conditions
Same as Example 1. As a result, the width of both charges is approximately
A 150 mm ribbon was obtained. Calculate the thickness of the ribbon
To evaluate the iron loss value, length every 20m in the longitudinal direction
A 200 mm sample was taken. The calculation of the thickness of the ribbon
The method and the method of measuring the iron loss value were the same as in Example 1.
Was. The results obtained are shown in Table 1. 18 ~
20. Total contact distance L between secondary cooling roll and ribbon
Is calculated using the right side of equation (1)
It was smaller than the critical total value issued. Thin obtained
The iron loss value of the obi exceeds 0.13 for each charge
It showed a high value. From these results, using the secondary cooling roll
Equation (1) is not satisfied even if the ribbon is cooled before winding
In this case, there is a problem of poor cooling when winding the ribbon,
It was found that the magnetic properties deteriorated. [0063]Comparative Example 2 Using the apparatus for manufacturing a single roll ribbon in air shown in FIG.
Using three secondary cooling rolls between the reel and the winding device
An experiment was conducted to manufacture a thin ribbon of a charge. Secondary cooling row used
The cooling rolls 17, 17 ', and 1 shown in FIG.
7 ". Three secondary cooling rolls were used, each having 6 /
It was made of 4 brass and all had a diameter of 15 cm. Start casting and take up the end of the ribbon
Surface speed of three secondary chill rolls immediately after capturing
Is set to be the same as the surface speed of the cooling roll, and FIG.
17, 17 ', 17 "secondary cooling row
Moved. And secondary cooling of 17, 17 ', 17 "
Distance of contact of the roll with the ribbon, L₁, L_Two, L_ThreePlace
Set the position of each secondary cooling roll so that
Then, the winding of the ribbon was continued. Secondary cooling roll and thin
How to determine the contact distance of the belt and other casting conditions
Same as Example 1. As a result, the width of both charges is approximately
A 150 mm ribbon was obtained. Calculate the thickness of the ribbon
To evaluate the iron loss value, length every 20m in the longitudinal direction
A 200 mm sample was taken. The calculation of the thickness of the ribbon
The method and the method of measuring the iron loss value were the same as in Example 1.
Was. The results obtained are shown in Table 1. 21-
23. Total contact distance L between secondary cooling roll and ribbon
Is calculated using the right side of equation (1)
It was smaller than the critical total value issued. Thin obtained
The iron loss value of the obi exceeds 0.13 for each charge
It showed a high value. From these results, using the secondary cooling roll
Equation (1) is not satisfied even if the ribbon is cooled before winding
In this case, there is a problem of poor cooling when winding the ribbon,
It was found that the magnetic properties deteriorated. [0068] According to the method of the present invention, an amorphous alloy
Poor cooling when winding rapidly solidified thin ribbons such as
High yield of thin ribbons because problems can be solved
It became possible to produce with.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram for explaining a method of the present invention. FIG. 2 is a schematic diagram showing a specific example of the method of the present invention. FIG. 3 is a schematic view illustrating a preparation method for performing the method of the present invention. FIG. 4 is a schematic view for explaining a conventional ribbon winding method. FIG. 5 is a schematic diagram for explaining a single-roll method as an example of a liquid quenching method. FIG. 6 is a schematic diagram for partially explaining a single roll method as an example of a liquid quenching method. [Description of Signs] 1 Molten metal 2 Tundish 3 Tuyere brick 4 Intermediate nozzle 5 Nozzle holder 6 Molten flow path 7 Nozzle tip 8 Nozzle slit 9 Stopper 10 Cooling roll 11 Thin strip 12 Enlarged internal space 13 Winding roll 13 'Reserve Take-up roll 14 take-up device 15 disk 16 support roller 17 secondary cooling roll 17 ′ secondary cooling roll 17 ″ secondary cooling roll

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B22D 11/06 390 B22D 11/06 360 B22D 11/124 B22D 11/22

Claims (1)

(57) [Claim 1] In a method for online winding a rapidly solidified thin ribbon obtained by ejecting a liquid metal or alloy onto a moving cooling substrate, the cooling substrate and the winding substrate may be wound. At least one rotating secondary cooling metal or alloy roll is arranged between the roll and the cooling device, and the rapidly solidified ribbon is formed on the circumferential surface of the roll so as to satisfy the following relational expression. A method for winding a rapidly solidified ribbon, comprising: contacting a short distance, and then winding the rapidly solidified ribbon. L (= L ₁ + L ₂ +... + L _n ) ≧ 12 × t / t ₀ × λ ₀
/ Λ (cm) where L is the total contact distance L ₁ of the secondary cooling roll and the rapidly solidified ribbon, and the contact distance L ₂ of the first secondary cooling roll and the rapidly solidified ribbon is 2 The contact distance L _n between the second secondary cooling roll and the rapidly solidified ribbon is the contact distance t between the n-th secondary cooling roll and the rapidly solidified ribbon, and the plate thickness t ₀ of the rapidly solidified ribbon is a reference. Λ is the thermal conductivity of the secondary cooling roll to be used. However, when multiple secondary cooling rolls are used, the thermal conductivity of the material having the best thermal conductivity is used. λ ₀ is the thermal conductivity of pure copper