JP5079385B2 - Method and apparatus for producing amorphous alloy ribbon - Google Patents

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).

  For example, Patent Document 3 proposes a polishing method in which the surface of the cooling roll is polished in a direction at an angle of 15 ° or more with a cup brush or a rotary brush with respect to the longitudinal direction of the ribbon.

  Patent Document 8 proposes a method for polishing or grinding based on the output of the online measuring device by providing an online measuring device that measures the surface roughness of the cooling roll. Patent Document 11 discloses a surface of the cooling roll. A method has been proposed in which the polishing powder and the brush dust generated by the polishing are removed with a comb-blade scraper.

  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.

  The present inventor has developed 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 embodiment was 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.

  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, the material, shape, polishing roughness, hardness, density (number of abrasives per unit area), contact area in the width direction of the cooling roll , A method for producing an amorphous alloy ribbon, characterized by polishing with one or more pressing forces different .

  (2) The method for producing an amorphous alloy ribbon according to (1), wherein the polishing is performed continuously or intermittently.

  (3) The method for producing an amorphous alloy ribbon according to (1) or (2), wherein the polishing is performed in parallel in the width direction of the cooling roll.

(4) Amorphous according to any one of (1) to (3), wherein a part or all of the polishing is performed by polishing means arranged in a plurality of stages in the circumferential direction of the cooling roll. Manufacturing method of alloy ribbon.

( 5 ) The method for producing an amorphous alloy ribbon according to any one of (1) to ( 4 ), wherein the polishing is performed with an abrasive.

( 6 ) 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, the amorphous alloy ribbon is In order to polish the circumferential surface of the chill roll after peeling, the material, shape, and polishing roughness in the width direction of the chill roll between the position where the manufactured ribbon is peeled and the position where the molten alloy is sprayed. An apparatus for producing an amorphous alloy ribbon characterized by comprising polishing means having different one or more of hardness, hardness, density (number of abrasives per unit area), contact area, and pressing force .

( 7 ) The cooling roll between the position for peeling the manufactured ribbon and the position for injecting the molten alloy in this order, the polishing means and the cleaning means for cleaning the circumferential surface of the cooled cooling roll. The apparatus for producing an amorphous alloy ribbon according to ( 6 ), wherein the amorphous alloy ribbon is disposed on an outer periphery of the ribbon.

( 8 ) The apparatus for producing an amorphous alloy ribbon according to ( 6 ) or ( 7 ), wherein the polishing means contacts the circumferential surface of the cooling roll continuously or intermittently.

( 9 ) The apparatus for producing an amorphous alloy ribbon according to any one of ( 6 ) to ( 8 ), wherein the polishing means is divided and arranged in the width direction of the cooling roll.

( 10 ) The amorphous alloy according to any one of ( 6 ) to ( 9 ), wherein a part or all of the polishing means is arranged in a plurality of stages in the circumferential direction of the cooling roll. Thin strip manufacturing equipment.

( 11 ) The apparatus for producing an amorphous alloy ribbon according to any one of ( 6 ) to ( 10 ), wherein the polishing means is an abrasive.

  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 is sound in the width direction of the cooling roll for a long time. As a result, the amorphous alloy ribbon having excellent magnetic properties can be mass-produced stably.

  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 the present inventors diligently analyzing the cause, as the production of the amorphous alloy ribbon progresses, cooling is performed at the center 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 the difference in the surface roughness of the roll occurs and the difference increases is due to 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 mm or less, the amount of heat shrinkage is also small. As a result, the degree of roughening of the cooling roll due to heat shrinkage is almost the same, and the heat shrinkage The degree of roughening of the cooling roll due to shrinkage 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 when the manufacturing time is extended (refer to the triangle mark in the figure), whereas it lasts for more than 5 minutes at the contact edge (the ribbon edge and edge). If the product is manufactured, the damage becomes large (see the mark ● in the figure), and the properties of the ribbon and the magnetic properties deteriorate.

  In the present invention, 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 sound surface in the width direction, the amorphous alloy thin film is manufactured during the production of the ribbon. When the circumferential surface of the cooling roll after peeling the strip is polished, polishing is performed with a distribution in the polishing characteristics in the width direction of the cooling roll. This is a feature of the present invention.

  The present invention will be described with reference to the drawings. In FIG. 3, the example of the aspect of the single roll apparatus which manufactures an amorphous alloy ribbon is shown.

  In the single roll apparatus shown in FIG. 3, 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 the single roll apparatus shown in FIG. 3, 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 The ribbon 6 is cut (a cutting device is not shown) and switched to the next winding roll 7b.

  The take-up roll 7a wound up with a predetermined amount of the amorphous alloy ribbon is replaced with a new take-up roll by an exchange device (not shown), and then the carousel reel 8 is rotated so that FIG. In this state, the winding is continued, and the amorphous alloy ribbon is produced for a long time.

  The circumferential surface of the cooling roll 5 after peeling the amorphous alloy ribbon 6 is polished online by the polishing means 9 in contact with the circumferential surface of the cooling roll. In the present invention, as described above, Further, polishing is performed using a polishing means having a distribution of polishing characteristics in the width direction of the cooling roll.

  The distribution of polishing characteristics is determined by the material of the polishing means, shape, polishing roughness, hardness, density (number of abrasives per unit area), contact area, pressing force, one or more, and the width direction of the cooling roll. It can be formed by adjusting as appropriate.

  FIG. 4 shows an embodiment of a polishing means having a distribution of polishing characteristics. The polishing means is divided into a central portion and both end portions, and different polishing characteristics are set in the central portion and both end portions.

  As described above, since the degree of damage in the width direction of the cooling roll is larger at the contact end (the ribbon end) and the vicinity thereof than at the center, the polishing end includes the contact end (the ribbon end). ) And the vicinity thereof, it is necessary to have a polishing characteristic distribution such that the polishing ability at both end portions for polishing the vicinity thereof is larger than the polishing ability at the central portion.

  However, it is necessary to suppress the surface roughness of the cooling roll to a level that does not deteriorate the characteristics of the amorphous alloy ribbon, and it is necessary to determine an appropriate abrasive in advance by experiments. .

  FIG. 4 (a) shows that the polishing ability at the contact end portion (the ribbon end portion) and both end portions for polishing the vicinity thereof is larger than the polishing ability at the central portion, so that the polishing means has the same density and the polishing roughness. This is an example in which the polishing roughness of the central portion is made fine and the polishing roughness of both ends is made rough.

  FIG. 4B shows the case where the polishing roughness of the polishing means is the same and the abrasive density is changed. The abrasive density at the center is reduced (roughly), and the abrasive density at both ends is increased. This is a (dense) example.

  In addition, in FIG. 4, although the grinding | polishing means divided into the center part and both ends and having the distribution in the grinding | polishing characteristic was shown, what is necessary is just to determine the division width according to the damage degree in the width direction of a cooling roll, Further, the section itself for forming the distribution of the polishing characteristics may be determined according to the degree of damage in the width direction of the cooling roll. For example, the distribution width of the polishing characteristic may be formed by making the division width of the central portion relatively narrow and dividing the both end portions into two.

  The polishing means is not limited to a specific polishing means as long as it has a shape, material, etc. that can provide a distribution in the polishing characteristics, but the polishing characteristics can be adjusted as appropriate and the polishing characteristics can be increased. A cylindrical brush roll is preferable because it can maintain time, and the abrasive is softer than the surface hardness of the cooling roll and resistant to friction with the surface of the cooling roll, for example, a resin fiber wire braided with abrasive grains. preferable.

  In addition, when using a roll-like polishing means such as a brush roll, it is preferable to rotate in order to maintain the polishing characteristics for a long time. In this case, the rotation direction is normal rotation or reverse rotation with respect to the cooling roll rotation direction. In either case, it is more preferable to arrange a suction device for sucking polishing scraps generated by polishing in the vicinity of the brush roll.

  In addition, as a polishing material, a polishing pad or a polishing paper / polishing belt provided with a mechanism capable of continuously supplying a new polishing surface is preferable because of its availability.

  Further, the polishing means may be swung in the width direction of the cooling roll in order to gently change the polishing characteristics at the portion where the polishing characteristics are divided.

  Furthermore, the circumferential surface of the cooling roll can be measured online to measure the degree of damage to the circumferential surface, and the polishing means can be brought into contact with the circumferential surface of the cooling roll continuously or intermittently based on the measurement result. Good.

  FIG. 5 shows another aspect of the polishing means having a distribution in the polishing characteristics. As shown in FIG. 5, the polishing means may be divided in the width direction of the cooling roll and arranged in parallel.

  In the polishing mode shown in FIG. 5 (a), the polishing roughness of the central polishing means is made fine, the polishing roughness of the polishing means at both ends is made rough, and the polishing characteristics are distributed in the width direction of the cooling roll. This is the case.

  In the polishing mode shown in FIG. 5B, the abrasive density of the central polishing means is reduced, the abrasive density of the polishing means at both ends is increased, and the polishing characteristics are distributed in the polishing in the width direction of the cooling roll. This is the case.

  In the polishing mode shown in FIG. 5C, the center and both ends of the polishing means are the same, but the pressing force of the center polishing means is reduced, the pressing force of the polishing means at both ends is increased, and the cooling roll This is a case where the polishing in the width direction has a distribution of polishing characteristics.

  In addition, also when dividing | segmenting a grinding | polishing means, what is necessary is just to determine according to the damage degree in the width direction of a cooling roll, and a division | segmentation aspect is not restrict | limited to 3 division shown in FIG.

  Also, when dividing the polishing means, measure the degree of damage of the circumferential surface of the cooling roll online and based on the measurement results, the polishing means can be integrated or individual polishing means can be individually Moreover, you may make it contact the circumferential surface of a cooling roll continuously or intermittently.

  Furthermore, the polishing means may be swung in the width direction of the cooling roll in order to change the polishing characteristics gently at the portion where the polishing characteristics are divided.

  When the polishing means is divided and the distribution of the polishing characteristics is given, polishing of the circumferential surface of the cooling roll between the polishing means may be insufficient, and polishing may be insufficient even in the entire width direction. As shown in FIGS. 6 to 8, the polishing means 9x and 9y may be arranged in a plurality of stages so as to partially or entirely overlap in the circumferential direction of the cooling roll, and polishing may be performed stepwise.

  In the two-stage split polishing mode shown in FIG. 6A, the polishing roughness of the central polishing means is made fine, the polishing roughness of the polishing means at both ends is made rough, and the polishing in the width direction of the cooling roll is polished. This is a case where a distribution of characteristics is given.

  In the two-stage split polishing mode shown in FIG. 6B, the central abrasive density is reduced, the abrasive density of the polishing means at both ends is increased, and the polishing characteristics are distributed in the width direction of the cooling roll. This is the case.

  In the two-stage split polishing mode shown in FIG. 6C, the polishing means are all the same, but by making both ends double, the contact area (polishing area) at both ends is increased, and the width direction of the cooling roll This is a case where the polishing characteristics are distributed in the polishing.

  Moreover, the division | segmentation grinding | polishing aspect shown to Fig.7 (a) has the polishing means shown to Fig.4 (a) which distributed the grinding | polishing characteristic in the width direction of the cooling roll in multiple steps (FIG.7 ( a) is a case where two stages are installed.

  7B, the surface roughness in the cooling roll width direction is uniform after the polishing means shown in FIG. 4A in which the polishing characteristics are distributed in the width direction of the cooling roll. Therefore, a plurality of polishing means having no distribution in the width direction (two-stage example in FIG. 7B) are installed in the rotation direction of the cooling roll.

  In the case where a plurality of polishing means are arranged, the polishing means may be determined according to the degree of damage in the width direction of the cooling roll, and the distribution, division, and number of arrangement stages of the polishing characteristics of the polishing means are shown in FIGS. The distribution of polishing characteristics is not limited to three divisions and two steps.

  In this case as well, the degree of damage of the circumferential surface of the cooling roll is measured online, and based on the measurement result, the polishing means is integrated, or individual polishing means are individually, continuously, or It may be intermittently brought into contact with the circumferential surface of the cooling roll, or the polishing means may be swung in the width direction of the cooling roll in order to gently change the polishing characteristics at the portion where the polishing characteristics are divided.

  Furthermore, in the present invention, as shown in FIG. 8, the circumferential surface of the cooling roll is cleaned 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. It is preferable to dispose the apparatus 10 to stably produce an amorphous alloy ribbon having excellent magnetic properties.

  As a device for cleaning the circumferential surface of the cooling roll, it is possible to employ a method of spraying / sucking gas, pressing a cloth or the like directly on the circumferential surface of the cooling roll, or using a brush roll not containing an abrasive. 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.

  Thus, in the present invention, during the production of the ribbon, when polishing the circumferential surface of the cooling roll after separating the amorphous alloy ribbon, the cooling roll is damaged in the width direction of the cooling roll. Accordingly, polishing is performed with a distribution in the polishing characteristics, so that the circumferential surface of the cooling roll can always be maintained in a healthy state for a long time.

  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. 3, an Fe-based amorphous alloy of Fe: 80.5%, Si: 6.5%, B: 12% C: 1% in terms of atomic%, A Fe-type amorphous alloy ribbon having a plate width of 170 mm and a plate thickness of about 30 μm was produced on a cooling roll surface having a width of 1198 mm and a roll width of 250 mm through a nozzle opening having a rectangular slit shape of 170 mm × 0.85 mm. The peripheral speed of the cooling roll during production was 21 m / s. The production conditions are shown in Table 1.

  In the present invention example 1, as the polishing means, a resin brush roll having an outer diameter of 100 mm and a length of 250 mm is used. As shown in FIG. 4A, the polishing characteristics are distributed, and the central portion of the brush roll is 50 mm. The polishing roughness was set to # 1000, and 100 mm at both ends was set to the polishing roughness # 500.

  Further, in Example 2 of the present invention, the two-stage divided polishing is used, and as shown in FIG. 6A, the polishing characteristics are distributed, and the outer diameter φ100 mm, the length 100 mm, and the polishing roughness are provided at the center of the first stage. A # 1000 resin brush roll was used at both ends of the second stage, and a resin brush roll having an outer diameter of 100 mm, a length of 100 mm, and a polishing roughness of # 500 was used.

  The first and second brushes overlap each other between 75 mm and 100 mm from the end of the cooling roll, and the distance between the first and second brushes at the overlapping portion is 50 mm.

  Example 3 of the present invention is also divided into two stages of division polishing, and as shown in FIG. 6C, the distribution of the polishing characteristics is given, and the outer diameter φ100 mm, the length 100 mm, and the polishing roughness # 1000 are provided at both ends of the first stage. Using a resin brush roll, a resin brush roll having an outer diameter of 100 mm, a length of 250 mm, and a polishing roughness of # 1000 was used in the second stage. The interval between the first and second brushes was 50 mm.

  Further, Example 4 of the present invention is a two-stage polishing, as shown in FIG. 7B, has a distribution in the polishing characteristics, and in the first stage, the center 50 mm is set to a polishing roughness # 1000, and both ends are polished. Using a resin brush roll with an outer diameter of φ100 mm and a length of 250 mm, with a polishing roughness of # 500 of 100 mm, equipped with a mechanism that can continuously supply a new polishing surface in the second stage, with a width of 250 mm and a polishing roughness # 1000 polishing paper was used, and the distance between the first and second polishing means was 200 mm.

  In addition, the density of the brush roll used by this invention example 1-4 was made the same.

  As a comparative example, in Comparative Example 1, a resin brush roll having an outer diameter of 100 mm, a length of 250 mm, and a polishing roughness of # 1000 having the same polishing characteristics in the cooling roll width direction was used. Further, in Comparative Example 2, a polishing paper having a width of 250 mm and a polishing roughness # 1000 having a mechanism capable of continuously supplying a new polishing surface was used.

  A sample was taken from the production end position of the produced amorphous ribbon, divided in the plate width direction and measured for magnetic properties, and the magnetic properties at the center and the ribbon end were compared. The magnetic properties of the Fe-based amorphous alloy ribbon sample (25 mm in width × 120 mm in length) were measured after heat treatment at 360 ° C. for 1 hour, followed by iron loss (1.3 T) using a single sheet tester (SST) apparatus. , 50 Hz). The results are also shown in Table 1.

  From the results shown in Table 1, in Inventive Examples 1 to 4, since the polishing characteristics are distributed in the width direction of the cooling roll according to the degree of damage to the cooling roll, the polishing roll is distributed over a long period of time. It can be understood that the peripheral surface can be maintained in a healthy state, and 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 1 and 2, since the polishing characteristics are not distributed in the width direction of the cooling roll, the circumferential surface of the cooling roll cannot be maintained in a healthy state, and the contact end of the cooling roll It can be seen that damage to the (ribbon edge) becomes large, and as a result, the iron loss at the ribbon edge has deteriorated.

  From the results shown in Table 1, it can be seen that in the present invention, an 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 the cooling roll As a result, it is possible to stably mass-produce amorphous alloy ribbons having excellent magnetic properties. 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 was continuously produced for 20 minutes without polishing the circumferential surface of the cooling roll (roughness when the roughness at the center was 1) FIG. Roughness change with respect to the manufacturing time of the center part of the cooling roll and the contact end part (the end part of the ribbon) 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 an amorphous alloy ribbon. It is a figure which shows the aspect of the grinding | polishing means which gave distribution to the grinding | polishing characteristic. (A) shows the case where the polishing roughness is changed, and (b) shows the case where the abrasive density is changed. It is a figure which shows another aspect of the grinding | polishing means which gave distribution to the grinding | polishing characteristic. (A) shows the case where the polishing roughness is changed, (b) shows the case where the abrasive density is changed, and (c) shows the case where the pressing force is changed. It is a figure which shows another aspect of the grinding | polishing means which gave distribution to the grinding | polishing characteristic. (A) shows a case where the polishing roughness is changed in a two-stage divided polishing mode, (b) shows a case where the abrasive density is changed in a two-step divided polishing mode, and (c) ) Shows a case where the contact area is changed in a two-stage divided polishing mode. It is a figure which shows another aspect of the grinding | polishing means which gave distribution to the grinding | polishing characteristic. (A) shows a case where a plurality of polishing means having a distribution in the polishing characteristics are installed, and (b) shows a polishing means having no distribution in the width direction next to the polishing means having a distribution in the polishing characteristics. Shows the case. It is a figure which shows another aspect of the single roll apparatus which manufactures an amorphous alloy ribbon.

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 9, 9x, 9y Polishing means 10 Cooling roll circumferential surface purification apparatus

Claims (11)

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, the material of the polishing means, shape, polishing roughness, hardness, density (number of abrasives per unit area), contact area, pressing force in the width direction of the cooling roll A method for producing an amorphous alloy ribbon, wherein one or two or more are polished.   The method for producing an amorphous alloy ribbon according to claim 1, wherein the polishing is performed continuously or intermittently.   The method for producing an amorphous alloy ribbon according to claim 1 or 2, wherein the polishing is performed by dividing the polishing roll in the width direction of the cooling roll and performing the polishing in parallel. The amorphous alloy ribbon according to any one of claims 1 to 3, wherein a part or all of the polishing is performed by polishing means arranged in a plurality of stages in the circumferential direction of the cooling roll. Production method. The method for producing an amorphous alloy ribbon according to any one of claims 1 to 4 , wherein the polishing is performed with an abrasive. In an apparatus for producing an amorphous alloy ribbon by injecting 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 In order to polish the circumferential surface of the cooling roll, the material, shape, polishing roughness, hardness in the cooling roll width direction on the outer periphery of the cooling roll between the position where the manufactured ribbon is peeled off and the position where the molten alloy is injected An apparatus for producing an amorphous alloy ribbon, comprising polishing means having one or more of density (number of abrasives per unit area), contact area, and pressing force . The polishing means and the cleaning means for cleaning the circumferential surface of the cooled cooling roll are arranged in this order on the outer periphery of the cooling roll between the position where the manufactured ribbon is peeled off and the position where the molten alloy is injected. The apparatus for producing an amorphous alloy ribbon according to claim 6 , wherein the amorphous alloy ribbon is disposed. The apparatus for producing an amorphous alloy ribbon according to claim 6 or 7 , wherein the polishing means contacts the circumferential surface of the cooling roll continuously or intermittently. The apparatus for producing an amorphous alloy ribbon according to any one of claims 6 to 8 , wherein the polishing means is arranged so as to be divided in the width direction of the cooling roll. Some or all of the polishing means, in the circumferential direction of the cooling roll, the production of amorphous alloy ribbon according to any one of claims 6-9, characterized in that it is a plurality of stages arranged apparatus. The apparatus for producing an amorphous alloy ribbon according to any one of claims 6 to 10 , wherein the polishing means is an abrasive.

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