JPS5825847A - Production of composite body - Google Patents

Abstract

PURPOSE:To obtain a composite material of superior properties taking advantage of the properties of respective materials in the stage of supplying molten metals between a roll pair under high speed revolution and producing a metallic strip by quick solidification thereof by supplying fine powder between the roll pair simultaneously. CONSTITUTION:For example, molten metals 4, 6 are supplied through nozzles 3, 5 onto rolls 1, 2 which face each other at a prescribed spacing and revolve at a high speed; at the same time, fine powder 8 is supplied through a nozzle 7. The metals 4, 6 are solidified quickly by the rolls 1, 2 and are rolled between both rolls whereby the metals are made into a metallic strip 11, and a composite body 10 formed with the layer 13 dispersed with the powder 8 in said strip is obtained. Here, the layer 12 is formed in the strip 11 and if the supply of the metal 6 through the nozzle 6 is stopped, the layer 12 dispersed with the powder 8 on one surface of the strip 11 is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a composite body in which the composite body is manufactured by direct rolling of molten metal.

Material technology has made remarkable progress in recent years, and materials with considerably superior properties are being developed. On the other hand, the required characteristics for materials are also becoming more complex and stricter. - For example, more than one characteristic is increasingly required at the same time, such as increasing the hardness of soft magnetic materials or improving wear resistance through dispersion strengthening of 2O. Therefore, the ninth step to meeting these demands is to make materials into composites for the purpose of supplementing one characteristic to another, or to combine materials with two different magnetic characteristics, such as Wiggand wire. Materials are also being made into composites for the purpose of combining them to obtain composite properties.

However, creating composite materials is generally complicated, often requiring complicated processes, and tends to increase prices. It is especially difficult to create composite materials for thin sheet materials. While [? had.

This invention was made by focusing on the nine conventional problems mentioned above. In particular, it is possible to easily obtain a thin plate-like composite, and it has excellent properties that take advantage of the characteristics of the materials that make up the composite. The object of the present invention is to provide a method for producing a composite material that can obtain materials such as:

The method for manufacturing a composite according to the present invention includes supplying a molten metal between rolls facing each other at a predetermined interval and rotating at high speed, and rapidly solidifying the molten metal by cooling the rolls to obtain a metal strip. Between the rolls, along with the molten metal, fine powder consisting of one or more types of fine metal powder or non-gold metal fine powder such as oxides, nitrides, carbides, and silicides is supplied as one or more flows. The present invention is characterized in that a layer in which the fine powder is dispersed is formed on one or both of the surface and interior of the rapidly solidified metal strip.

FIG. 1 shows an example of the structure of a manufacturing apparatus for a vine composite body to which the present invention is applied, in which rolls 1 and 2 face each other at a predetermined distance and rotate at high speed, 6 a molten metal, and a metal 4. Nozzle 5 for supplying molten metal onto the roll 1
7 is a nozzle for supplying fine powder 8 onto the roll 2. And both nozzles 6
．． Molten gold 1 is poured from 5 onto rolls 1 and 2 rotating at high speed.
! At the same time as the fine powder 8 is supplied from the nozzle 7, the molten metals 4, 6 are rapidly cooled and solidified by the rolls 1, 2, and rolled between the rolls 1.2 to form the metal strip 11. As shown in FIG. 2, the metal band 11 has a composite body 1 formed thereon with a layer 12 in which the fine powder 8 is dispersed.
0 is obtained.

In this case, the layer 12 in which the fine powder 8 is dispersed is the metal strip 1
1, the layer structure is not necessarily limited to this. That is, for example, one nozzle 5
When the supply of molten metal 6 is stopped, a layer 12 in which fine powder 8 is dispersed is formed only on one surface of metal strip 11. Furthermore, by appropriately increasing the number of nozzles for molten metal and the number of nozzles for fine powder, the number of metal strips and layers in which fine powder is dispersed can be further increased, and the number of layers according to the required properties can be increased. It is possible to obtain the configuration.

Furthermore, the molten metals 4 and 6 do not necessarily have to have the same composition, but may have different compositions (metals or alloys) as appropriate.
It is also possible to use molten metal. On the other hand, as the fine powder, one or more fine powders of metals or alloys, fine powders of non-metals made of simple substances such as carbon or compounds such as oxides, nitrides, carbides, silicides, etc. may be used as appropriate. You can choose and use it.

Furthermore, the material, diameter, rotation speed, etc. of the roll can be selected as appropriate, but the metal strip obtained by rapidly solidifying the molten metal by roll cooling must be amorphous. There's nothing wrong with that, let's have a ticket.
It is best to determine the conditions for rapid solidification according to the characteristics of the desired composite.

Furthermore, the t-complex 10 obtained by the above rapid solidification
may be rolled if necessary.

On the other hand, the amount of molten metal 4, 6 and fine powder 8 to be supplied should be determined as appropriate, but in this case, the nozzle 3
, 5.7, adjusting the size of the opening, changing the pressure applied by inert gas, applying vibration, etc. can be adopted.

Examples will be described below.

Example 1 Here, an apparatus equipped with two molten metal nozzles 6.5 and one fine powder nozzle 7 as shown in FIG. 1 was used. For rolls 1 and 2, steel drums with a diameter of 60 mm were used, and they were rotated at approximately 2000 rpm. In addition, for molten gold-4,6, Fe4,7”70jS1
11BIO is heated to about 1,300°C, melted, and ejected from nozzles 3 and 5 toward roll 1.2. At the same time, Ni with an average particle size of about 1 μm is released from nozzle 7.
- Continuously supplying fine ferrite powder to the inner roll 1,
The composite material 10 in the form of a ribbon was produced by rolling and rapidly solidifying the material. The thickness of this composite is 80 μm, and the metal band 11
A layer 12 in which the Ni-ferrite fine powder is dispersed
Amorphous 'RFe4. yCOyolmsite
Bt. An alloy was obtained.

Next, a thin plate-like composite body having a layer of ANi-ferrite fine powder obtained in this example and a composite body manufactured by a conventional molten metal direct rolling method as a comparative example,
, an amorphous alloy band consisting only of sSi I5BIO, and the effective magnetic permeability in the high frequency region were investigated.
The results shown in the figure were obtained. As shown in FIG. 3, it was confirmed that the effective magnetic permeability in the high frequency region was improved by the effect of the dispersed ferrite 2O fine powder with high electrical resistivity.

Example 2 Here, in the apparatus shown in FIG.
is closed to stop the supply of molten metal 6, and Fe4. , Co. , , St I5BIO, is supplied onto the roll 1 which rotates once at about 200 Orpm, and at the same time Ni-ferrite fine powder is supplied from the nozzle 7 between the rolls 1.2 to form an amorphous metal. F”
4. VCOTo, 3S'15B10 alloy piece @ N on the surface
A composite body having a dispersed layer of fine i-ferrite powder was produced. The thickness of the composite at this time was about 50 μm.

Next, a thin plate-shaped composite having a layer of N1-ferrite fine powder manufactured according to this example and a composite body manufactured by a conventional molten metal direct rolling method as a comparative example.
Using an amorphous alloy strip consisting only of 15° and 3st 15B1°, each was cut into a predetermined laminated core shape and laminated, and the resistivity in the thickness direction of the laminate 15° and 160° was determined as shown in Fig. 4. As a result of investigation, in the case of the present example shown in FIG. 4 (&), when the resistivity was 5, the resistivity was 130 FΩ. As is clear from this result, in this example, because the electrical resistivity of the ferrite is high, the current between the eyebrows is very small even when laminated as is, and it is clear that a laminated core can be formed even without layer insulation. It was confirmed that the occupancy rate will remain at the same level in spring.

Example 3 (Sys loop shown.Furthermore, as shown in Figure 6,
By forming the tape-shaped composite 18 into a tape having a diameter of 0.08 pieces (page 9), the manufacturing process can be shortened compared to the conventional method, and the cost can be reduced. .

In addition to the above example, CO was used as the molten metal and superhard fine powder was selected as the fine powder to create a Co tape with the superhard fine powder dispersed on the surface, and this Co tape was used as a substrate. When the abrasion resistance of the surface was examined by adhesion, very good results were obtained. Furthermore, a material exhibiting good properties as a cutting tool edge was also obtained.

In addition, a Ni-Cr alloy tape with rare earth oxide fine powder dispersed on its surface was produced in the same manner, and this tape material was used to protect the surface of materials used in high-temperature atmospheres.
We were able to obtain very good results.

Each of the above embodiments shows only a small part of the embodiment of the manufacturing method according to the present invention, and not only the types of molten metal and fine lO□ powder, but also the number of molten metal flows and the number of fine powder flows. By increasing or decreasing the amount appropriately, it is possible to obtain a laminate of vertebrae with different laminate structures.

It is also possible to obtain an amorphous or crystalline material depending on the material of the roll, the number of revolutions, etc., and an extremely wide range of properties can be selected.

This has the great effect of making it possible to obtain a material with excellent overall properties by taking advantage of each property.

[Brief explanation of the drawing]

Fig. 1 is an explanatory view of the main parts showing an example of the structure of a composite manufacturing apparatus to which the present invention can be applied, Fig. 2 is a perspective view showing an example of a composite manufactured by the present invention, and Fig. 3 is a perspective view of this example. Graphs 4(a) and 4(b) show examples of the results of investigating the effective magnetic permeability of the composites manufactured according to Example 1 of the invention, respectively. Explanatory diagrams of the laminated core, FIGS. 5 and 6 are graphs showing the hysteresis characteristics of the tape-shaped composite manufactured according to Example 3 of the present invention, and graphs of the CTM wire manufactured using the above-mentioned chip-shaped composite. It is an explanatory diagram. 10...Composite, 11...Metal band, 12...Layer in which fine powder is dispersed. Patent applicant: Daido Steel Co., Ltd. Figure 1, Figure 2II

Claims (1)

[Claims] (1) Molten metal is supplied between rolls that face each other and rotate at high speed, and when the molten metal is rapidly solidified by cooling the rolls to obtain a metal strip, fine powder is mixed with the molten metal between the rolls. A method for producing a composite body, comprising: supplying a metal strip containing the rapidly solidified metal to form a layer in which the fine powder is dispersed therein.