JPS63220984A - Amorphous alloy sheet band laminated plate - Google Patents

Abstract

PURPOSE:To speed up and facilitate the lamination joining by superposing plural amorphous alloy sheet bands to join these by the spot welding or the seam welding. CONSTITUTION:Alloy molten metal for forming the amorphous alloy sheet band such as Fe-B-Si, etc., is cooled rapidly using a cooling roll and the amorphous alloy sheet band is formed and the plural sheet bands are superposed. Next, the spot welding or the seam welding under a proper pattern and condition is performed on the amorphous alloy sheet bands in a cast state and afterward, the heat-treatment is performed thereon. At this time, even in the heat- treating state, a weld zone is not peeled and an amorphous characteristic is not changed. By this method, the joining work is facilitated and speeded up.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an amorphous alloy thin laminate, and in particular, the present invention relates to an amorphous alloy thin laminate, in which the advantageous W1 of the amorphous alloy ribbon can be improved without deteriorating various properties of the amorphous alloy ribbon. This is an attempt to create stratification.

(Prior Art) When a molten alloy having a specific composition is solidified to a thickness of 105 to 105 b by a rapid cooling method, such as a single roll method, an amorphous alloy ribbon having a thickness of about 20 to 50 μl is obtained. Many of these amorphous alloys have excellent not only mechanical properties but also physical properties.
In recent years, its use has been actively studied.

For example, Fe-B-8i series and co-Fe-3-3i series amorphous alloy ribbons (hereinafter referred to as ribbons) have excellent soft magnetic properties, and Fe-B-8i series in particular have relatively high saturation magnetic flux densities. Because it has extremely low iron loss in the commercial frequency range, it is attracting attention as a promising alternative material to the silicon steel sheets currently used as core materials for transformers and motors.

Conventionally, such ribbons were used as a single plate without being glued, and a wound core or a mating core was made to assemble a transformer, but generally speaking, the ribbon thickness was the same as before. Because it is thinner than plain steel sheets, it has the disadvantage of requiring more man-hours for lamination.

Therefore, it has been proposed to reduce the number of lamination steps and improve the insulation resistance between ribbons by bonding multiple ribbons together.

For example, in Japanese Patent Application Laid-Open No. 58-175654 and International Application Publication No. WO 36/05314, lif &
We are proposing a means to suppress the disappearance of the adhesive layer during the intermediate annealing process.

(Problem to be solved by the invention) However, although the above method has the advantage of reducing the number of lamination steps, it requires high adhesive material costs and extra processes such as coating, drying, and adhesion. This had the disadvantage of increasing manufacturing costs.

In particular, since amorphous alloy ribbons are extremely thin and have a large specific surface area, a solution to the above-mentioned drawbacks has been desired.

There is also a method using warm pressure welding that does not use auxiliary materials such as adhesives, but this method has the problem that the laminate becomes extremely brittle.

The purpose of this invention is to solve the various problems in the prior art described above, and first of all, in this invention, the basic idea is not to use an adhesive which causes an increase in cost.

Furthermore, since heating the entire ribbon causes the ribbon to become brittle, various thin plate bonding techniques were investigated on the premise of VL construction. This invention was developed as a result of such research.

(Failure to solve the problem) First, the background to the elucidation of this invention will be explained.

Normally, when welding an amorphous alloy, it is exposed to high temperatures, so it has been thought that the amorphous state cannot be maintained. Therefore, only very specific and slow welding methods, such as ultrasonic bonding, have been proposed for joining ribbons.

In other words, ultrasonic bonding is microscopically J! ! Since it is friction welding, the temperature rise is local and limited, and the ribbons can be joined while remaining in an amorphous state. However, this method has
The drawback is that high-speed welding cannot be ensured.

By the way, spot welding and seam welding are extremely common methods for joining thin steel plates, but they have never been used to join ribbons together because they instantaneously reach a temperature of 'B' even if only partially. . In addition, in applications such as soldering, where the material ultimately melts and diffuses and there is no need to consider maintaining an amorphous state, spot welding was used for temporary attachment to crystalline metal substrates. There is.

Until now, spot welding and seam welding have been used not only for the purpose of utilizing properties that are extremely sensitive to the amorphous state, such as magnetic properties, but also for the purpose of simply forming ribbons into blocks. I have never been hurt. However, since spot welding and seam welding have advantages such as being able to perform work in open spaces and easily securing industrial joining speeds, it would be considered extremely advantageous if these techniques could be used.

Therefore, the inventors tried these techniques to join amorphous alloy ribbons and conducted various studies, and found that, contrary to previous expectations, there are conditions over a wide range that allow for joining and lamination without deterioration of magnetism. It was discovered that this could be done.

This invention is based on the above knowledge.

That is, the present invention provides an amorphous alloy ribbon W formed by joining a plurality of amorphous alloy ribbons by spot welding or seam welding.
It is a 4-layer board.

This invention will be specifically explained below.

First, the experimental results that formed the basis of this invention will be explained.

From a molten alloy with a composition (atomic ratio) of F e76 Bll S '10 cm, a width: 50
A ribbon of mm and plate thickness: 24 μl was produced.

When this ribbon was subjected to magnetic field annealing at 380° C. for 1 hour under the application of a magnetic field of 200 e, the iron @W□815° was 0.11 W/kg.

Next, when we spot-welded the as-cast ribbons in the pattern shown in Figure 1 (4 kg of pressurized crab, 3 WS of welded crab), the two ribbons were bonded together well without any holes at the welding points. It was possible to join them and handle them as a single laminate. Next, as with the veneer ribbon, 20Qe
When annealed for 1 hour at 380°C under a magnetic field of
and was the same as before joining.

Furthermore, when spot welding (pressure force 6 kg, welding output 5 WS) was performed using three as-cast ribbons in the pattern shown in Fig. 1, no holes were formed at the welding points.
It was possible to join two ribbons and handle them as one laminate, and the average thickness was 72 μm. Then 200
When annealed for 1 hour at 380°C under a magnetic field of e and then cooled, the iron loss W□375o was 0.13 W/
It was kg. Although this was slightly higher than the iron loss of a single-plate ribbon, it was the same as the iron loss when measuring three ribbons simply stacked on top of each other without joining them.

In addition, using two as-cast ribbons, seam welding is performed in the pattern shown in Figure 2 (pressure force 15 kg, continuous energization).
As a result, the two ribbons could be joined without creating holes in the welded area, and could be handled as one gI laminate. Then, when the same magnetic field annealing as above was performed, the iron loss W13/io was 0.12 W/8.

As is clear from the above experimental data, by spot welding or seam welding according to the present invention, a plurality of amorphous alloy ribbons could be laminated and joined with almost no deterioration of magnetism.

Although only experiments considered for application to magnetic applications have been described above, the lamination and thickening of amorphous alloy ribbons according to the present invention can be extremely advantageously applied to other applications as well.

For example, when using an amorphous alloy as a soldering material, it is difficult to secure the required amount with a single ribbon, so it is often necessary to use multiple ribbons in layers. At this time, the ribbons had to be lined up so that they would not be misaligned, so great care had to be taken. Furthermore, it is easy to understand that in the case of laminated ribbons made of adhesive, thermal decomposition gas is generated during heat treatment, which significantly impairs the bonding strength.

On the other hand, in the case of spot welding and seam welding proposed in this invention, there is no coexistence of foreign substances such as adhesives, so no volatile gas is generated even during high-temperature heat treatment. strength can be reached.

Further, when using a ribbon as a reinforcing material in a composite material, there is an advantage that the number of times of lamination required to ensure the required strength can be reduced.

(Example) Example 1 pe79s12sr8c, group a (Il child ratio)
The molten alloy is injected from a slit-shaped nozzle directly onto a single roll that rotates at high speed, and the width is 50n and the thickness is 21μm.
A ribbon was made. The two ribbons were then spot welded in the pattern shown in FIG. Pressure force during spot welding is 6kg
When the welding power was set to 3W-8, welding was possible without any holes.

When this NR ribbon was annealed at 370°C for 2 hours under a 20Q e magnetic field and then cooled, the iron loss W1815° was 0.10 W/kg, and the joint did not separate even after annealing. .

Example 2 Fe78B. A molten alloy having a composition of 5i12 was injected from a slit-shaped nozzle directly onto a single roll rotating at high speed to produce a ribbon having a width of 50 nm and a thickness of 19 μm. Next, three ribbons were spot welded in the pattern shown in FIG. Pressure force during spot welding: 6, welding output: 5W-8
As a result, we were able to join the parts without creating any holes at the welding points. This laminated ribbon was annealed at 380° C. for 1 hour under a magnetic field of 20 Q c, but the iron loss W13150 was O.ii W/kg, and the bonded portion did not separate even after annealing.

Example 3 Pressure force during spot welding was 6 kg, welding output was 10 W -3
The treatment was carried out in the same manner as in Example 1, except that. There were small holes in about half of the weld points, but the joint was successful. Iron loss W□37. .

o, 11 W/kg, and no peeling occurred at the bonding point even after annealing.

Example 4 A molten alloy having a composition (weight ratio) of N; A ribbon was made.

The two ribbons were then seam welded in the pattern shown in FIG. The pressure force during seam welding was 2 (1+3), and welding was performed with continuous current application.

This made it possible to withstand shearing and the like as a single laminate. Therefore, it has become equivalent to JISM grade BNi-IA as a brazing material for stainless steel and Ni-based alloys.

Comparative Example 1 The Fe78B1oSi02 ribbon of Example 2 was annealed at 380°C for 1 hour under a magnetic field of 2000° C. without joining. Iron loss W1 of single plate: Jrro' 0.09 W/
b, W process of three-layer measurement, 7. . is 0.10W
/kg.

(Effects of the Invention) As described above, according to the present invention, a plurality of amorphous alloy ribbons can be laminated and bonded easily and quickly without deterioration of their properties. It can be extremely advantageously applied to reduce man-hours in core assembly processing such as quadrance.

Furthermore, the present invention can be advantageously applied not only to magnetic applications but also to fields where the range of use can be expanded by increasing the thickness of the amorphous alloy ribbon.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a spot welding pattern in the present invention, and FIG. 2 is a diagram showing an example of a seam welding pattern in the present invention.

Claims (1)

[Claims] 1. An amorphous alloy ribbon laminate formed by joining a plurality of amorphous alloy ribbons by spot welding or seam welding. 2. The laminate according to claim 1, wherein the amorphous alloy ribbon is a magnetic alloy.