CN-116261758-B - Method and apparatus for heat treatment of amorphous alloy ribbon

Abstract

The invention provides a heat treatment method and a heat treatment device for an amorphous alloy thin strip, which can inhibit the generation of anisotropy of magnetic characteristics and uniformly heat treat the amorphous alloy thin strip. The heat treatment method for an amorphous alloy thin strip includes the steps of bringing an amorphous alloy thin strip into contact with a heated convex surface and moving the amorphous alloy thin strip, and pressing a portion of the amorphous alloy thin strip in contact with the convex surface against the convex surface from the side opposite to the surface in contact with the convex surface and moving the amorphous alloy thin strip.

Inventors

• SANO HIROHISA
• FUKUYAMA TAKESHI

Assignees

• 株式会社博迈立铖

Dates

Publication Date

20260505

Application Date

20210922

Priority Date

20200925

Claims (9)

1. 1. A heat treatment method of an amorphous alloy ribbon is characterized by comprising the following steps: Bringing a ribbon of amorphous alloy into thermal contact with the convex surface of a heated roller for heating, and The portion of the amorphous alloy thin strip abutting against the convex surface is pressed against a strip member conveyed via two heating rollers from the opposite side of the abutting surface and moves the amorphous alloy thin strip.
2. 2. The method for heat treatment of an amorphous alloy ribbon according to claim 1, wherein the ribbon member is a metal member.
3. 3. The method for heat treatment of an amorphous alloy ribbon according to claim 2, wherein pressing is performed while heating the ribbon member.
4. 4. The method of heat treating an amorphous alloy ribbon according to claim 3, wherein the step is performed a plurality of times by changing the surface of the amorphous alloy ribbon against which the convex surface is abutted.
5. 5. The method for heat treatment of an amorphous alloy ribbon according to any one of claims 1 to 4, wherein the amorphous alloy ribbon is a nanocrystalline soft magnetic material.
6. 6. A heat treatment apparatus for an amorphous alloy ribbon, which performs heat treatment while moving the amorphous alloy ribbon, comprising a combination of: A heating part composed of a heating roller and comprising a convex surface of the heating roller for abutting and heating the amorphous alloy ribbon, and And a pressing portion that presses the portion of the amorphous alloy thin strip that is in contact with the convex surface from the opposite side of the contact surface, the pressing portion being a strip member that is movable via two heating rollers.
7. 7. The apparatus for heat treatment of an amorphous alloy thin strip according to claim 6, wherein the strip member is a metal member.
8. 8. The apparatus for heat treatment of an amorphous alloy thin strip according to claim 7, wherein the two heating drums include a heating mechanism for heating the strip member.
9. 9. The heat treatment apparatus of an amorphous alloy thin strip according to any one of claims 6 to 8, wherein a plurality of the combinations are included in a traveling direction of the amorphous alloy thin strip, and in adjacent combinations, a positional relationship of the heating portion with respect to the amorphous alloy thin strip and the strip member is reversed.

Description

Method and apparatus for heat treatment of amorphous alloy ribbon Technical Field The present invention relates to a heat treatment method for an amorphous alloy ribbon and a heat treatment apparatus for an amorphous alloy ribbon. Background As a method for adjusting the characteristics of the amorphous alloy ribbon, a process is known in which the amorphous alloy ribbon is heated by bringing the amorphous alloy ribbon into contact with a heated convex surface and moving the amorphous alloy ribbon. Specifically, a method is known in which an amorphous alloy ribbon is brought into contact with a heated roll surface, and is moved while being mechanically restrained, and is subjected to heat treatment by rapid temperature rise and cooling (for example, patent document 1). Prior art literature Patent literature Patent document 1 WO2011/060546 publication Disclosure of Invention Problems to be solved by the invention According to the method described in patent document 1, for example, heat treatment can be performed while suppressing embrittlement. But in order to ensure adequate contact with the roll surface, a large tension is required to be applied to the thin strip. Further, the surface of the thin belt is not necessarily flat, and a certain undulation may remain, so that the tension required for sufficiently bringing the entire surface of the thin belt into contact with the roller may be increased. In this case, there is a fear that the direction of the thin belt causes the anisotropy of the magnetic characteristics to become too strong. The use of thin strips with large anisotropy of magnetic properties is limited. Further, in order to ensure sufficient contact between the thin belt and the roller, there is a limit in tension applied to the thin belt, and there is a concern that the contact state between the thin belt and the roller becomes uneven, resulting in uneven heat treatment. Accordingly, the present invention provides a heat treatment method and a heat treatment apparatus for an amorphous alloy ribbon, which can uniformly heat-treat the amorphous alloy ribbon while suppressing the occurrence of anisotropy of magnetic characteristics. Technical means for solving the problems The present invention provides a heat treatment method for an amorphous alloy thin strip, comprising the steps of bringing an amorphous alloy thin strip into contact with a heated convex surface and moving the same, and pressing and moving a portion of the amorphous alloy thin strip in contact with the convex surface against a belt member movable via a roller from the opposite side of the surface in contact with the portion. Further, it is preferable that the belt member is a metal member. Further, the pressing is preferably performed while heating the belt member. Preferably, the step is performed a plurality of times by changing the surface of the amorphous alloy ribbon against which the convex surface is in contact. Further, it is preferable that the amorphous alloy ribbon is a nanocrystalline soft magnetic material. A heat treatment apparatus for an amorphous alloy thin strip, which performs heat treatment while moving the amorphous alloy thin strip, comprises a combination of a heating section including a convex surface for abutting and heating the amorphous alloy thin strip, and a pressing section which presses a portion of the amorphous alloy thin strip abutting against the convex surface from the opposite side of the abutting surface, and which is a strip member movable via a roller. Further, it is preferable that the belt member is a metal member. Further, it is preferable that the drum includes a heating mechanism that heats the belt member. Further, it is preferable that the amorphous alloy thin strip includes a plurality of combinations in a traveling direction thereof, and that, in adjacent combinations, a positional relationship between the heating portion and the strip member with respect to the amorphous alloy thin strip is reversed. ADVANTAGEOUS EFFECTS OF INVENTION According to the present invention, an amorphous alloy ribbon can be manufactured in which the occurrence of anisotropy of magnetic characteristics is suppressed by performing heat treatment while ensuring sufficient thermal contact without applying a large tensile force to the amorphous alloy ribbon. Drawings Fig. 1 is a conceptual perspective view of a heat treatment machine for an amorphous alloy ribbon as a first embodiment of the present invention. Fig. 2 is a schematic diagram showing the sequence ((a) to (f)) of the heat treatment method of the amorphous alloy ribbon in the first embodiment of the present invention. Fig. 3 is an enlarged schematic view of the pressing portion and the heating portion in the second embodiment of the present invention. Fig. 4 is a graph showing magnetic characteristics of example 1 and comparative example 1 in the first embodiment of the present invention. Fig. 5 is a diagram showing amorphous alloy ribbons in e