JP2008279459A - Method for producing amorphous alloy thin strip, and production device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing an amorphous alloy thin strip and a production device therefor where, when an amorphous alloy thin strip is produced using a cooling roll, during the production, the circumferential face of the cooling roll is ground in the width direction of the cooling roll online, a sound state is maintained for a long time, and an amorphous alloy thin strip having excellent magnetic properties is mass-produced. <P>SOLUTION: In the method for producing an amorphous alloy thin strip by jetting a molten alloy on the circumferential face of a cooling roll during high speed rotation and rapidly cooling and solidifying the same, during the production of the thin strip, when the circumferential face of the cooling roll after the separation of the amorphous alloy thin strip is ground to the width direction of the cooling roll, it is ground in such a manner that (i) at least two grinding means having different grinding properties are arranged to the rotational direction of the cooling roll and (ii) the grinding means are brought into contact with the circumferential face of the cooling roll at a length of ≥0.2% of the circumference of the cooling roll, so as to perform the grinding. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method and apparatus for producing an amorphous alloy ribbon by injecting a molten alloy onto the surface of a cooling roll and rapidly solidifying it, and in particular, during the production of the ribbon, the surface of the cooling roll is polished online. The present invention relates to a method and apparatus.

  As a method for producing an amorphous alloy ribbon, usually, a molten alloy is jetted onto a circumferential surface of a cooling roll rotating at high speed, and rapidly solidified by heat removal from the cooling roll, that is, a single roll process. However, it is generally adopted.

In the single roll method, it is necessary to quench the molten alloy at a cooling rate of about 10 ⁴ to 10 ⁵ ° C / second. Therefore, a cooling roll made of a metal material having a high thermal conductivity such as a copper alloy is usually used as a cooling roll that rapidly takes heat from the molten alloy.

  When an amorphous alloy ribbon is produced industrially, after the molten alloy is rapidly solidified by a cooling roll, the amorphous alloy ribbon is continuously wound while being peeled off from the cooling roll. Since the molten alloy is in direct contact with the surface of the steel sheet, as the production progresses, the surface of the cooling roll is damaged due to heat history, solidification of the molten alloy, etc., and the surface roughness of the cooling roll increases. The material of the surface layer part may deteriorate.

  This phenomenon adversely affects the surface properties, magnetic properties, etc. of the amorphous alloy ribbon, and sometimes causes the amorphous alloy ribbon to break during production.

  Therefore, when the amorphous alloy ribbon is produced industrially, maintaining the circumferential surface of the cooling roll in a healthy state for a long time is not only the productivity of the amorphous alloy ribbon. In order to maintain the magnetic properties constant, many proposals have been made to polish the circumferential surface of the cooling roll (see Patent Documents 1 to 12).

  In particular, Patent Document 5 proposes a surface cleaning device for a cooling roll in which a plurality of brush rolls are arranged on the circumferential surface of the cooling roll in order to remove foreign matter adhering to the circumferential surface of the cooling roll. ing.

  Patent Document 7 proposes a method of polishing the surface of a cooling roll by pressing four types of emery paper having different particle sizes in the order of coarseness by a spring mechanism against the circumferential surface of the cooling roll.

  In Patent Document 8, an online measuring device for measuring the surface roughness of the cooling roll is provided, and a method of polishing or grinding based on the output of the online measuring device is proposed. In one embodiment, a brush roll and then a buffol are used. A mode of polishing or grinding is shown.

  Patent Document 11 proposes a method in which the surface of the cooling roll is polished with a brush roll, and polishing powder and brush dust generated by the polishing are removed with a comb blade-shaped scraping device.

  However, all of the methods proposed in Patent Documents 1 to 12 indicate that the damage generated on the circumferential surface of the cooling roll is almost the same in the width direction of the cooling roll due to the production of the amorphous alloy ribbon. It is a premise.

  That is, in the above method, when the degree of damage to the circumferential surface of the cooling roll differs in the width direction of the cooling roll, the circumferential surface of the cooling roll cannot be polished to a healthy state.

  When industrially producing amorphous alloy ribbons with excellent magnetic properties, it is necessary to maintain the circumferential surface of the cooling roll in a healthy state for a long time at all times. There is a need for the development of a technique that can always polish the circumferential surface of the cooling roll to a sound state even when the width direction is different.

JP-A-58-025848 JP 58-029557 A JP-A-61-209755 JP-A-62-166059 Japanese Patent Laid-Open No. 62-176650 JP-A-63-090341 JP-A-63-090343 Japanese Patent Laid-Open No. 03-169460 Japanese Patent Laid-Open No. 03-275252 Japanese Patent Laid-Open No. 07-178516 Japanese Patent Laid-Open No. 07-178517 Japanese Patent Laid-Open No. 08-019834

  In the present invention, when producing an amorphous alloy ribbon using a cooling roll, the circumferential surface of the cooling roll is polished online in the width direction of the cooling roll during the production, and is in a healthy state over a long period of time. It is an object of the present invention to provide a manufacturing method and a manufacturing apparatus capable of mass-producing amorphous alloy ribbons having excellent magnetic properties.

  In order to develop a method for maintaining the circumferential surface of the cooling roll in a healthy state for a long time during the production of the amorphous alloy ribbon, the present inventors have developed damage to the circumferential surface of the cooling roll. The present invention has been intensively investigated.

  As a result, (i) when the molten alloy solidifies and shrinks on the chill roll, the solidified part that bites into the fine recesses on the surface of the chill roll scratches the surface of the chill roll and generates wrinkles. The shrinkage of the ribbon is greatest at both ends in the width direction of the ribbon. (Iii) Over time, the damage on the circumferential surface of the cooling roll contacting the both ends of the ribbon is less than the damage at the center. It turned out to be bigger.

  During the production of the ribbon, when the circumferential surface of the cooling roll after separating the amorphous alloy ribbon is polished across the width direction of the cooling roll, the distribution of the polishing characteristics is set in the rotation direction of the cooling roll. If the polishing means having different polishing characteristics is disposed and polished, the circumferential surface of the cooling roll having different degrees of damage at the central portion and the both ends of the ribbon can always be maintained in a healthy state. I have come to know that I can do it.

    This invention was made | formed based on the said knowledge, and the summary is as follows.

(1) In a method for producing an amorphous alloy ribbon by injecting a molten alloy onto the circumferential surface of a cooling roll that is rotating at high speed and rapidly solidifying it, the amorphous alloy ribbon is When polishing the circumferential surface of the cooling roll after peeling over the width direction of the cooling roll,
(I) Polishing by disposing at least two polishing means having different polishing characteristics in the rotation direction of the cooling roll;
A method for producing an amorphous alloy ribbon characterized by the above.

(2) In a method for producing an amorphous alloy ribbon by injecting a molten alloy onto the circumferential surface of a cooling roll that is rotating at high speed and rapidly solidifying it, during the production of the ribbon, the amorphous alloy ribbon is When polishing the circumferential surface of the cooling roll after peeling over the width direction of the cooling roll,
(I) arranging at least two polishing means having different polishing characteristics in the rotation direction of the cooling roll;
(Ii) Polishing the polishing means by contacting the circumferential surface of the cooling roll with a length of 0.2% or more of the circumference of the cooling roll;
A method for producing an amorphous alloy ribbon characterized by the above.

  (3) Of the above polishing means, the last stage polishing means has a function of cleaning the circumferential surface of the cooled cooling roll together with the polishing function. The method for producing an amorphous alloy ribbon according to (1).

(4) In a method for producing an amorphous alloy ribbon by injecting a molten alloy onto the circumferential surface of a cooling roll that is rotating at high speed and rapidly solidifying it, the amorphous alloy ribbon is When polishing the circumferential surface of the cooling roll after peeling over the width direction of the cooling roll,
(I) At least two polishing means having different polishing characteristics and a cleaning means for cleaning the circumferential surface of the cooled cooling roll are arranged in this order in the rotation direction of the cooling roll,
(Ii) Polishing the polishing means by contacting the circumferential surface of the cooling roll with a length of 0.2% or more of the circumference of the cooling roll;
A method for producing an amorphous alloy ribbon characterized by the above.

  (5) The polishing characteristics are set by adjusting one or two or more of the material, shape, polishing roughness, hardness, contact area, and pressing force of the polishing means. The method for producing an amorphous alloy ribbon according to any one of 4).

  (6) The amorphous material according to any one of (1) to (5), wherein all or part of the polishing means is brought into contact with the circumferential surface of the cooling roll continuously or intermittently. Of producing high quality alloy ribbon.

(7) In an apparatus for producing an amorphous alloy ribbon by injecting a molten alloy onto the circumferential surface of a cooling roll that is rotating at high speed and rapidly solidifying it, on the circumferential surface of the cooling roll during the production of the ribbon In the position between the position where the amorphous alloy ribbon is peeled off and the molten alloy jet, over the width direction of the cooling roll,
(I) At least two polishing means having different polishing characteristics are arranged in the rotation direction of the cooling roll.
An amorphous alloy ribbon production apparatus characterized by the above.

(8) In an apparatus for producing an amorphous alloy ribbon by injecting a molten alloy onto the circumferential surface of a cooling roll that is rotating at high speed and rapidly solidifying it, on the circumferential surface of the cooling roll during the production of the ribbon In the position between the position where the amorphous alloy ribbon is peeled off and the molten alloy jet, over the width direction of the cooling roll,
(I) arranging at least two polishing means having different polishing characteristics in the rotation direction of the cooling roll;
(Ii) bringing the polishing means into contact with the circumferential surface of the cooling roll at a length of 0.2% or more of the circumference of the cooling roll;
An amorphous alloy ribbon production apparatus characterized by the above.

(9) In an apparatus for producing an amorphous alloy ribbon by injecting a molten alloy onto the circumferential surface of a cooling roll that is rotating at high speed and rapidly solidifying it, on the circumferential surface of the cooling roll during the production of the ribbon In the position between the position where the amorphous alloy ribbon is peeled off and the molten alloy jet, over the width direction of the cooling roll,
(I) At least two polishing means having different polishing characteristics and a cleaning means for cleaning the circumferential surface of the cooled cooling roll are arranged in this order in the rotation direction of the cooling roll,
(Ii) bringing the polishing means into contact with the circumferential surface of the cooling roll at a length of 0.2% or more of the circumference of the cooling roll;
An amorphous alloy ribbon production apparatus characterized by the above.

  (10) The amorphous alloy ribbon manufacturing apparatus according to any one of (7) to (9), wherein all or part of the polishing means is brought into contact with a circumferential surface of a cooling roll. .

  (11) The amorphous alloy ribbon manufacturing apparatus according to any one of (7) to (10), wherein one of the polishing means includes an abrasive.

  (12) One of the said grinding | polishing means is a brush roll, The manufacturing apparatus of the amorphous alloy ribbon in any one of said (7)-(10) characterized by the above-mentioned.

  (13) The above-mentioned (7) characterized in that the polishing characteristic has a function of adjusting and setting one or more of the material, shape, polishing roughness, hardness, contact area, and pressing force of the polishing means. ) To (12) The amorphous alloy ribbon production apparatus.

  According to the present invention, during the production of the amorphous alloy ribbon, the circumferential surface of the cooling roll having a different degree of damage in the width direction of the cooling roll is polished online, and in the width direction of the cooling roll for a long time. A healthy state can be maintained, and as a result, an amorphous alloy ribbon having excellent magnetic properties can be stably mass-produced.

  The present invention will be described in detail.

  Along with the production of the amorphous alloy ribbon, the damage generated on the circumferential surface of the cooling roll greatly affects the surface properties and magnetic properties of the amorphous alloy ribbon. Therefore, the inventors focused on the change in the surface roughness of the cooling roll, which greatly affects the surface properties and magnetic properties of the amorphous alloy ribbon, and investigated the occurrence of damage to obtain the following knowledge. It came.

  When the circumferential surface of the cooling roll is not polished, as the manufacturing progresses, the roughness in the width direction of the cooling roll changes as shown in FIG.

  FIG. 1 shows the results of investigating the change in roughness in the cooling roll width direction for each manufactured amorphous alloy ribbon. Specifically, in the circumferential surface of the cooling roll that the molten alloy contacted, With respect to the roughness of the portion, the roughness increases toward the contact end (the ribbon end).

  Further, the difference in roughness between the center portion and the contact end portion (the ribbon end portion) increases as the width of the amorphous alloy ribbon increases, and becomes significant when the width of the amorphous ribbon is 50 mm or more. .

  And, as a result of earnest analysis of the cause by the present inventors, with the progress of the production of the amorphous alloy ribbon, in the central portion and the contact end portion (the ribbon end portion) of the circumferential surface of the cooling roll, It has been found that the phenomenon in which a difference in roll roughness occurs and the difference increases is caused by thermal shrinkage in the width direction of the cooling roll that occurs during solidification of the molten alloy.

  That is, when the molten alloy solidifies on the surface of the cooling roll, it shrinks on the cooling roll. At this time, the alloy that has already solidified by biting into the minute recesses on the surface of the cooling roll is pulled to the center of the cooling roll. As a result, the surface of the cooling roll is scratched, and as a result, the surface of the cooling roll is damaged and roughened.

  Further, once the surface of the cooling roll is damaged, the molten alloy is likely to bite into the damaged portion, and the damage to the cooling roll increases as the manufacturing progresses.

  The heat shrinkage at the time of solidification of the molten alloy occurs in the width direction and the longitudinal direction of the cooling roll. In the longitudinal direction, the width of the molten alloy to be supplied is substantially constant, so the amount of heat shrinkage in the longitudinal direction of the cooling roll is In addition, since the longitudinal width of the molten alloy is as narrow as several millimeters or less, the amount of heat shrinkage is small. As a result, the degree of roughening of the cooling roll due to heat shrinkage is almost the same, and also due to heat shrinkage. The degree of roughening of the cooling roll is also small.

  On the other hand, in the width direction of the cooling roll, the contraction length of the contact end portion (thin strip end portion) is longer than the contraction length of the central portion, so the contact end portion (thin strip end portion) and its vicinity The degree of surface damage in the case becomes larger than that in the central portion.

  The present inventors show that the above phenomenon is remarkably exhibited when an amorphous alloy ribbon having a width of 50 mm or more is produced continuously for 5 minutes or longer without polishing the circumferential surface of the cooling roll. confirmed.

  FIG. 2 shows that the 106 mm-wide amorphous alloy ribbon is manufactured by changing the production time without polishing the circumferential surface of the cooling roll. The roughness change of a cooling roll is shown.

  The damage at the center is small even if the manufacturing time is lengthened (refer to Δ mark in the figure), whereas the contact end (the ribbon end, the edge) continues for more than 5 minutes. When manufactured, the damage increases (see ● in the figure), and the ribbon properties and magnetic properties deteriorate.

In the present invention, in this way, in order to finish the circumferential surface of the cooling roll having a different degree of damage in the width direction of the cooling roll into a healthy circumferential surface over the width direction,
(I) disposing at least two polishing means having different polishing characteristics in the rotation direction of the cooling roll;
This is the first feature.

Furthermore, in the present invention, in addition to the first feature,
(Ii) The polishing means has a length of 0.2% or more of the circumference of the cooling roll and is brought into contact with the circumferential surface of the cooling roll for polishing.
This is the second feature.

  The reason for this is as follows.

  As described above, in the width direction of the cooling roll, the degree of surface damage at the contact end portion (the ribbon end portion) and in the vicinity thereof is larger than the degree of damage at the center portion.

  Therefore, if rough polishing more than damage to the contact edge (thin ribbon edge) is performed, a uniform roughness state can be maintained in the cooling roll width direction, but the surface roughness of the cooling roll is too rough and magnetic The characteristics will deteriorate. Therefore, it is necessary to finish the contact end portion (thin strip end portion) and the central portion with the same degree of roughness as before the damage by a polishing means capable of realizing polishing at a desired roughness level.

  In the production of amorphous alloy ribbon by the single roll method, the chill roll contacts and solidifies every round, so the surface of the chill roll is damaged every turn due to thermal shrinkage during solidification. Receive. In order to maintain the circumferential surface of the cooling roll in a healthy state, when the polishing means is arranged on the circumferential surface of the cooling roll, the polishing roll comes into contact with one place in the rotation direction once for one rotation.

  Therefore, in order to maintain a sound cooling roll circumferential surface using a polishing means that can realize polishing at a desired roughness level, it is necessary to increase the polishing efficiency in a single contact.

  As a result of searching for an efficient polishing method by the present inventors, by combining abrasives having different polishing characteristics, it is possible to significantly increase the polishing efficiency as compared with the case where a plurality of abrasives having the same characteristics are installed in a wide range or in a wide range. It was found that the surface state of the initial cooling roll can be maintained substantially uniformly throughout the cooling roll width direction until the amorphous alloy ribbon is manufactured.

  Furthermore, in order to maintain the surface state of the cooling roll at an almost initial surface state, it is necessary to bring one of the polishing means into contact with the circumference of the cooling roll at least 0.2% of the circumference. There was found. That is, it was found that when the contact percentage is less than 0.2%, the polishing efficiency is reduced and the cooling roll is gradually damaged.

  The present invention will be further described with reference to the drawings. 3a to 3c show an example of an embodiment of a single roll apparatus for producing an amorphous alloy ribbon.

  In the single roll apparatus shown in FIG. 3 a, the opening surface of the ejection nozzle 3 is brought close to the circumferential surface of the cooling roll 5 rotating at high speed, and the molten alloy 2 in the tundish 1 is ejected from the ejection nozzle 3. Thus, the amorphous alloy ribbon 6 is continuously manufactured.

  When the stopper 4 in the tundish 1 is raised, the molten alloy 2 is ejected to the circumferential surface of the cooling roll 5, and the production of the amorphous alloy ribbon 6 begins. The amorphous alloy ribbon 6 is wound up. It is wound up on a roll 7a.

  In FIG. 3a, the next winding roll 7b stands by in the vicinity of the amorphous alloy ribbon, and when the winding amount of the winding roll 7a reaches a predetermined amount, the amorphous alloy ribbon 6 is It is cut (a cutting device is not shown) and switched to the next winding roll 7b.

  The take-up roll 7a wound with a predetermined amount of the amorphous alloy ribbon is replaced with a new take-up roll by an exchanging device (not shown), and then the carousel reel 8 is rotated so that FIG. Winding is continued in the state shown in (1) to produce an amorphous alloy ribbon over a long period of time.

  In the present invention, the circumferential surface of the cooling roll 5 after peeling the amorphous alloy ribbon 6 is polished online by polishing means having different polishing characteristics. In the single roll apparatus shown in FIG. 3a, two polishing means 9a and 9b are arranged in the rotation direction of the cooling roll. The polishing means 9a and 9b always contact the circumferential surface of the cooling roll with the length L and polish the surface area of the length L.

  The length L is an important index for increasing the polishing efficiency of the contact end portion (thin strip end portion) having a large degree of surface damage in the cooling roll.

  The polishing characteristics of the polishing means can be set by appropriately adjusting one or more of the material, shape, polishing roughness, hardness, contact area, and pressing force of the polishing means, but the required contact length L Is preferable for the polishing characteristics that can be maintained for a long time.

  The present inventors changed the contact length with the circumferential surface of the cooling roll (hereinafter also referred to as “polishing length”) L for the polishing means having the required polishing characteristics, An alloy ribbon was manufactured, and the surface roughness of the contact end portion (thin strip end portion) where the degree of damage was maximum and the central cooling roll where damage was minimum was measured.

  The results (results when two polishing means are arranged in the rotation direction of the cooling roll) are shown in FIG.

  From FIG. 4, when the contact length (polishing length) L is 0.2% or more of the circumference of the cooling roll, there is almost no difference in roughness between the contact end (thin strip end) and the center. It can be seen that smoothing is possible. Therefore, in the present invention, the contact length (polishing length) L of the polishing means is 0.2% or more of the circumference of the cooling roll. This point is the second feature of the present invention as described above.

  The polishing means is not limited to a specific shape and material as long as it has the required polishing characteristics and can maintain the contact length (polishing length) L over a long period of time. What can adjust a grinding | polishing characteristic suitably and can maintain the contact length L for a long time is preferable.

  A material that is softer than the surface hardness of the cooling roll and resistant to friction on the surface of the cooling roll, for example, a cylindrical brush roll made of an abrasive material in which abrasive grains are knitted into a resin fiber wire is preferable.

  The rotation direction in the case of the brush roll may be the same direction or the reverse direction with respect to the cooling roll rotation direction, but it is necessary to rotate at least from the viewpoint of brush roll damage.

  In addition, a polishing pad, a polishing paper, a polishing belt, and the like can also be applied as an abrasive because it is easily available. In order to make the polishing finish uniform, the polishing means may be swung in the cooling roll width direction.

  As described above, it is important for the polishing units 9a and 9b to change the polishing characteristics in the rotation direction of the cooling roll. That is, in the single roll apparatus shown in FIG. 3a, even if the polishing means 9b adopts the same means as 9a as the polishing means, the polishing characteristics must be different from the polishing characteristics of the polishing means 9a. Naturally, the polishing characteristics of the polishing means 9b are set according to the surface properties of the circumferential surface of the cooling roll polished by the preceding polishing means.

  Further, as shown in FIG. 3c, a cleaning device 10 for cleaning the circumferential surface of the cooling roll is provided in the vicinity of the polishing means in order to remove minute polishing debris remaining on the circumferential surface of the cooling roll after polishing. The arrangement is preferable for stably producing an amorphous alloy ribbon having excellent magnetic properties.

  As a cleaning device that cleans the circumferential surface of the cooling roll, use means that uses a brush roll that does not contain abrasives, such as gas blowing / suction, directly pressing cloth against the circumferential surface of the cooling roll, etc. Can do.

  As for the brush roll, a material that is softer than the surface hardness of the cooling roll and resistant to friction on the surface of the cooling roll, for example, a cylindrical brush roll made of a resin fiber wire, is preferable.

  Further, as the final stage polishing means, as shown in FIG. 3b, a polishing means 9c that directly presses the polishing member against the circumferential surface of the cooling roll may be employed. The polishing member is preferably a polishing pad or a polishing paper / polishing belt provided with a mechanism capable of continuously supplying a new surface.

  Since the polishing pad and the polishing belt have a function of cleaning the circumferential surface of the cooling roll while cleaning it, a polishing means that contacts the circumferential surface of the cooling roll with a contact length L (9a in FIG. 3b). It is suitable as a polishing means arranged next to the above.

  As for the polishing means 9c, a mechanism such as a shape that fits the outer peripheral surface of the cooling roll or a mechanism such as pressing with a soft rubber so that it can be deformed according to the outer peripheral surface of the cooling roll so that a predetermined contact length can be obtained More preferred.

  In addition, the degree of damage of the circumferential surface of the cooling roll is measured online, and all or part of the polishing means is continuously or intermittently applied to the circumferential surface of the cooling roll based on the measurement result. You may make it contact.

  Thus, in the present invention, since the circumferential surface of the cooling roll after separating the amorphous alloy ribbon can be efficiently polished during the production of the ribbon, the circumferential surface of the cooling roll Can be constantly maintained in a healthy state for a long time, and an amorphous alloy ribbon having excellent magnetic properties can be stably mass-produced.

  Next, examples of the present invention will be described. The conditions of the examples are one example of conditions adopted for confirming the feasibility and effects of the present invention, and the present invention is limited to this one example of conditions. Is not to be done. The present invention can adopt various conditions as long as the object of the present invention is achieved without departing from the gist of the present invention.

(Example)
Using the single roll apparatus of the embodiment shown in FIG. 3a and FIG. 3b, an Fe-based amorphous alloy containing Fe: 80.5%, Si: 6.5%, B: 12% C: 1% in atomic%, Jetted from a rectangular slit-shaped nozzle opening of 170 mm × 0.85 mm and 106 mm × 0.85 mm on the surface of a cooling roll having a diameter of 1198 mm and a roll width of 250 mm, a plate width of 170 mm, a plate thickness of about 30 μm and a plate width of 106 mm, a plate A Fe-based amorphous alloy ribbon having a thickness of about 30 μm was produced. The peripheral speed of the cooling roll during production was 21 m / s.

  A sample was taken from the production end position of the produced amorphous ribbon, divided in the plate width direction, measured for magnetic properties, and compared with the magnetic properties at the center and the ribbon end. Regarding the magnetic properties, the Fe-type amorphous alloy ribbon sample (width 25 mm × length 120 mm) collected was subjected to heat treatment at 360 ° C. × 1 hour, and then subjected to iron loss (1. 3T, 50 Hz).

  Table 1 shows manufacturing conditions and measurement results. In addition, the grinding | polishing means 1 and the grinding | polishing means 2 which are shown in Table 1 were installed in the rotation direction of the cooling roll in this order.

  From the results shown in Table 1, in Examples 1 to 6 of the present invention, since the polishing means having different polishing characteristics are arranged and the contact length (polishing length) L is 0.2% or more, the cooling is performed for a long time. The circumferential surface of the roll can be maintained in a healthy state. As a result, there is no difference in iron loss between the central portion of the ribbon and the end portion of the ribbon, and a good amorphous alloy ribbon is obtained.

  On the other hand, in Comparative Examples 7 to 9, although the polishing means having different polishing characteristics are arranged, the contact length (polishing length) L is 0.1%, so that the circumferential surface of the cooling roll is in a healthy state. It cannot be maintained, and damage to the contact end portion (the ribbon end portion) of the cooling roll becomes large, and as a result, the iron loss at the ribbon end portion is deteriorated.

  In Comparative Examples 10 to 11, since the polishing means having the same polishing characteristics is used, the polishing efficiency is poor even if the contact length (polishing length) L is increased from 0.1% to 0.2%. For this reason, damage to the contact end portion (the ribbon end portion) of the cooling roll cannot be prevented, and the iron loss at the ribbon end portion is deteriorated.

  Further, in Comparative Example 12, because only the cooling means 1, even if the contact length (polishing length) L is set to 0.3%, damage to the contact end portion (the ribbon end portion) of the cooling roll cannot be prevented, The iron loss at the end of the ribbon has deteriorated.

  From the results shown in Table 1, it can be seen that according to the present invention, the Fe-based amorphous alloy ribbon having excellent magnetic properties can be stably mass-produced over a long period of time.

  As described above, according to the present invention, during the production of the amorphous alloy ribbon, the circumferential surface of the cooling roll having a different degree of damage in the width direction of the cooling roll is polished online and cooled for a long time. A sound state can be maintained in the width direction of the roll, and as a result, an amorphous alloy ribbon having excellent magnetic properties can be stably mass-produced. Therefore, the present invention has great applicability in the amorphous alloy ribbon manufacturing industry.

Changes in the roughness in the width direction of the cooling roll when the amorphous alloy ribbon is continuously produced for 20 minutes without polishing the circumferential surface of the cooling roll (roughness when the roughness at the center is 1) FIG. Roughness change with respect to the manufacturing time of the center part of the cooling roll and the contact end part (strip end part) when the amorphous alloy ribbon is manufactured without polishing the circumferential surface of the cooling roll (cooling roll roughness before manufacturing) FIG. 6 is a diagram showing the roughness ratio when 1 is 1. It is a figure which shows the one aspect | mode of the single roll apparatus which manufactures the amorphous alloy ribbon by the example of this invention. It is a figure which shows the one aspect | mode of the single roll apparatus which manufactures the amorphous alloy ribbon by the example of this invention. It is a figure which shows the one aspect | mode of the single roll apparatus which manufactures the amorphous alloy ribbon by the example of this invention. Roughness change with respect to the manufacturing time of the cooling roll center and contact end (thin strip end) when the contact length (polishing length) L between the polishing means and the circumferential surface of the cooling roll is changed (before manufacture) It is a figure which shows the roughness ratio when the cooling roll roughness of 1 is taken as 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tundish 2 Molten alloy 3 Injection nozzle 4 Stopper 5 Cooling roll 6 Amorphous alloy ribbon 7a, 7b Winding roll 8 Carousel reel 9a, 9b, 9c Polishing means 10 Cleaning device

Claims (13)

In a method for producing an amorphous alloy ribbon by injecting a molten alloy onto the circumferential surface of a cooling roll that is rotating at high speed and rapidly solidifying it, after the amorphous alloy ribbon is peeled off during the production of the ribbon When polishing the circumferential surface of the cooling roll over the width direction of the cooling roll,
(I) Polishing by disposing at least two polishing means having different polishing characteristics in the rotation direction of the cooling roll;
A method for producing an amorphous alloy ribbon characterized by the above. In a method for producing an amorphous alloy ribbon by injecting a molten alloy onto the circumferential surface of a cooling roll that is rotating at high speed and rapidly solidifying it, after the amorphous alloy ribbon is peeled off during the production of the ribbon When polishing the circumferential surface of the cooling roll over the width direction of the cooling roll,
(I) arranging at least two polishing means having different polishing characteristics in the rotation direction of the cooling roll;
(Ii) Polishing the polishing means by contacting the circumferential surface of the cooling roll with a length of 0.2% or more of the circumference of the cooling roll;
A method for producing an amorphous alloy ribbon characterized by the above.   The amorphous means according to claim 1 or 2, wherein the polishing means in the final stage of the polishing means has a function of cleaning the circumferential surface of the cooled roll after polishing together with the polishing function. Of producing high quality alloy ribbon. In a method for producing an amorphous alloy ribbon by injecting a molten alloy onto the circumferential surface of a cooling roll that is rotating at high speed and rapidly solidifying it, after the amorphous alloy ribbon is peeled off during the production of the ribbon When polishing the circumferential surface of the cooling roll over the width direction of the cooling roll,
(I) At least two polishing means having different polishing characteristics and a cleaning means for cleaning the circumferential surface of the cooled cooling roll are arranged in this order in the rotation direction of the cooling roll,
(Ii) Polishing the polishing means by contacting the circumferential surface of the cooling roll with a length of 0.2% or more of the circumference of the cooling roll;
A method for producing an amorphous alloy ribbon characterized by the above.   The polishing characteristic is set by adjusting one or more of the material, shape, polishing roughness, hardness, contact area, and pressing force of the polishing means. A method for producing an amorphous alloy ribbon according to Item.   The amorphous alloy ribbon according to any one of claims 1 to 5, wherein all or part of the polishing means is brought into contact with the circumferential surface of the cooling roll continuously or intermittently. Manufacturing method. In an apparatus for producing an amorphous alloy ribbon by injecting a molten alloy onto the circumferential surface of a cooling roll that is rotating at high speed and rapidly solidifying it, during the production of the ribbon, on the circumferential surface of the cooling roll, In the position between the position where the amorphous alloy ribbon is peeled off and the molten alloy jet, over the width direction of the cooling roll,
(I) At least two polishing means having different polishing characteristics are arranged in the rotation direction of the cooling roll.
An amorphous alloy ribbon production apparatus characterized by the above. In an apparatus for producing an amorphous alloy ribbon by injecting a molten alloy onto the circumferential surface of a cooling roll that is rotating at high speed and rapidly solidifying it, during the production of the ribbon, on the circumferential surface of the cooling roll, In the position between the position where the amorphous alloy ribbon is peeled off and the molten alloy jet, over the width direction of the cooling roll,
(I) arranging at least two polishing means having different polishing characteristics in the rotation direction of the cooling roll;
(Ii) bringing the polishing means into contact with the circumferential surface of the cooling roll at a length of 0.2% or more of the circumference of the cooling roll;
An amorphous alloy ribbon production apparatus characterized by the above. In an apparatus for producing an amorphous alloy ribbon by injecting a molten alloy onto the circumferential surface of a cooling roll that is rotating at high speed and rapidly solidifying it, during the production of the ribbon, on the circumferential surface of the cooling roll, In the position between the position where the amorphous alloy ribbon is peeled off and the molten alloy jet, over the width direction of the cooling roll,
(I) At least two polishing means having different polishing characteristics and a cleaning means for cleaning the circumferential surface of the cooled cooling roll are arranged in this order in the rotation direction of the cooling roll,
(Ii) bringing the polishing means into contact with the circumferential surface of the cooling roll at a length of 0.2% or more of the circumference of the cooling roll;
An amorphous alloy ribbon production apparatus characterized by the above.   The apparatus for producing an amorphous alloy ribbon according to any one of claims 7 to 9, wherein all or part of the polishing means is brought into contact with a circumferential surface of a cooling roll.   11. The apparatus for producing an amorphous alloy ribbon according to claim 7, wherein one of the polishing means includes an abrasive.   One of the said grinding | polishing means is a brush roll, The manufacturing apparatus of the amorphous alloy ribbon of any one of Claims 7-10 characterized by the above-mentioned.   13. The function of adjusting the polishing characteristics by adjusting one or more of the material, shape, polishing roughness, hardness, contact area, and pressing force of the polishing means. An apparatus for producing an amorphous alloy ribbon according to any one of the preceding claims.

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