JPS6027482A - Method for cladding light-gauge amorphous metallic strip to metal - Google Patents

Abstract

PURPOSE:To produce a clad material having excellent adhesion in the stage of cladding a light-gauge amorphous metallic strip to a light-gauge metallic strip by bringing the surface of the light-gauge amorphous metallic strip where micro-holes exist into tight contact with the light-gauge metallic strip and heating and pressing the strips to melt the surface of the light-gauge metallic strip thereby intruding the melt thereof into the holes of the light-gauge amorphous metallic strip. CONSTITUTION:Numerous micro-holes 21 exist in the part of a light-gauge amorphous metallic strip 6 produced by quick cooling from a molten state by a single roll method where said strip contacts with the roll surface in the stage of manufacture and therefore the strip with said surface positioned to face downward is adhered to other light- gauge metallic strip 7 to be clad, then the strips are transferred rightward on an endless circulating belt 10. The strips are heated by a heater 5 and heaters 3, 4 of rollers 1, 2 for cladding and are pressed by the rollers 1, 2, by which the strips are clad. The cladding temp. in this stage is maintained at the embrittling temp. -20 deg.C of the amorphous metal to melt half the surface of the strip 7 and to infiltrate the melt thereof into the holes 21 and thereafter the strips are cooled with a shower 14 and is dried with a blower 15. The clad material of the strip 7 and the strip 6 is thus produced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method and an apparatus for cladding an amorphous metal ribbon to a metal in an amorphous state.

[Background of the invention]

As a method of cladding a steel material with an amorphous metal, there is Japanese Patent Publication No. 57-159256. In this method, when cladding a copper strip with metal in an amorphous state, the steel strip is previously subjected to a surface treatment with a metal that is likely to form an atomic bond structure with the amorphous metal. This is a method in which a molten metal is brought into continuous contact with a copper strip and rapidly cooled to form an amorphous metal. This method has various problems regarding equipment and amorphization. For example, regarding the nozzle structure and amorphization on the equipment, the copper strip passes through the molten metal, so it no longer becomes amorphous when heated.

For this reason, in this method, the material is allowed to pass through the material at a time that is too fast to cause heating. However, this is a serious problem due to the mechanism of the device.

[Purpose of the invention]

An object of the present invention has been made in view of the above problems, and is to provide a method and an apparatus for cladding an existing amorphous metal ribbon with metal.

[Summary of the invention]

Since amorphous metals have excellent mechanical properties, chemical properties, and other magnetic and electrical properties, new applications are being developed. However, the shape is a thin strip (about 10 mm thick)
~60 μm), so its applications are currently limited. Therefore, in order to expand the use of amorphous metals, there is an urgent need to convert them into solid metals. Therefore, in the present invention, we focused on bulking by cladding. Regarding the cladding method for amorphous metals, there are conventional methods as described above. However, this method actually has various problems.

Therefore, in the method of the present invention, we focused on the fact that there are many microscopic pores caused by gases in the atmosphere on the roll surface side (the surface in direct contact with the roll) of an amorphous metal ribbon produced by the single roll method in the atmosphere. did. That is, we focused on forming the amorphous metal ribbon and the metal cladding entirely mechanically by press-fitting semi-molten or molten metal into the pores of the metal.

The present invention was developed based on the results of an experiment in which an amorphous metal ribbon was clad in an amorphous state using an existing apparatus on a laboratory scale.

[Embodiments of the invention]

FIG. 1 shows an apparatus for cladding a metal ribbon with an amorphous ribbon according to the present invention. The main formation of this device is to transport the amorphous metal ribbon 8 wound around a roll 6, the metal ribbon 9 wound around a roll 9, and the cladding material attached to rolls 11, 12, and 13. It consists of a belt lO for use and a roll 1.2 for cladding. As shown in FIG. 2, a large number of microscopic holes 21 are present on the roll surface of an amorphous metal ribbon produced in the atmosphere. Incidentally, FIG. 2 is a photograph taken from a cross-sectional photograph of the ribbon in the width direction. The F3) U method of the present invention utilizes the holes 21 of the above. That is, microscopic irregularities are extremely advantageous for mechanical bonding. Therefore, the roll surface of the amorphous metal ribbon 8 shown in FIG. 1 needs to be in contact with the metal ribbon 9. However, the amorphous metal ribbon 8 has extremely good wettability, such as solder.
This does not have to be the case when cladding wax.

That is, the free solidification surface opposite to the roll surface and the joining surface of the metal ribbon 9 may be used. The heater 5 is for heating the amorphous metal ribbon 6 and the metal ribbon 7, and the heating temperature must be below the embrittlement temperature of the amorphous metal ribbon 6. This is because if the temperature is higher than that, crystallization occurs, and preferably the temperature is -20C (embrittlement temperature) as indicated in claim 2. The base metal of amorphous metal is F6. It is roughly divided into Co and Ni types.

The embrittlement temperature of the Fe system is about 250C, and the embrittlement temperature of the Fe system is about 250C, and the
The temperature is about 370C, which is higher than that of the system. Therefore, it is necessary to select the material of the cladding metal based on the embrittlement temperature of the amorphous metal. The metal materials include low melting point metals Cd, Ga,
In, Sm, Sn, Se.

Pure metals such as Bi, TI, 't'b, Pb, Li and combinations of these and other elements have a melting point of 350C
The following alloys are good. The rolls 1.2 are each heated with heaters 3.4. This is amorphous metal ribbon 6 and metal ribbon 7.
This is to prevent a temperature drop when the amorphous metal ribbon 6 comes into contact with the roll 1.2, and to bring the surface of the metal ribbon 7 in contact with the amorphous metal ribbon 6 into a semi-molten or molten state.

For example, a metal ribbon 7 with a melting point of 200C and an amorphous metal ribbon 6
The temperature conditions for cladding are as follows: the temperature of the heater is set to about -2°C%, that is, 1 sor, from the melting point of the metal ribbon 7, and the temperature of the roll 2 is also set to 180C by the heater 4. However, the temperature of roll 1 is set higher than that of roll 2 by +70C. That is, it is set to about 250C. As a result, the amorphous and metal ribbons were heated to 180c in seconds and conveyed from the heater 5 by the belt lO to the roll 1,
When the metal ribbon 7 comes into contact with the roll 2, the temperature of the roll 2 is 180t?
I fully support it. However, since the temperature of the roll 1 is 25 Orr, the amorphous metal ribbon 6 is rapidly heated (because the thickness of the ribbon is as thin as 20 to 50 μm). Thereupon, the surface of the metal ribbon 7 in contact with the amorphous metal ribbon 6 is brought into a molten or semi-molten state and is clad. The above-mentioned temperatures of the amorphous and metal ribbons and the temperature of the roll 1 are set to appropriate values depending on the thickness of the metal ribbon 7, and the circumferential speeds of the rolls 1 and 2 also vary.

The desired optimum condition is a temperature at which a small portion of the surface layer of the metal ribbon 7 in contact with the amorphous metal ribbon 6 melts. This is because when the thickness of the molten layer increases, the original shape of the metal ribbon 7 is no longer maintained.

Note that the gap between the rolls 1.2 is set based on the total thickness of the amorphous and metal ribbons, and is set to be negative than the total thickness. The clad material 16 that has passed through the rolls 1.2 is cooled by a cooling jaw 14 and dried by a drying prower 15.

FIG. 3 shows a modification of the device according to the invention. Roll 1 in Figure 1
By using a material having the shape shown in FIG. 4, a clad material having the shape shown in FIG. 5 can be manufactured. FIG. 5 shows a longitudinal cross-section of the cladding material. Amorphous metals have a high elastic limit and are easily deformed at room temperature, but they are easily deformed by heating. It goes without saying that the amount of deformation increases as the temperature increases, but the maximum heating temperature is determined by the embrittlement temperature of the amorphous metal. The device of the present invention shown in FIG. 3 was devised by focusing on the deformation of amorphous metal by heating. That is, when producing a clad material having a shape as shown in FIG. 5, it can be produced by using the apparatus shown in FIG. 1 and using only the roll 1 shown in FIG. 4 as the roll 1. However, when manufacturing a product having a shape that is uneven on both sides as shown in FIG. 6, it is necessary to use the roll shown in FIG. 4 for O-#2 in the apparatus shown in FIG. In this case, since the belt 10 is interposed between the rolls 1 and 2, it is possible to do so by selecting the material of the belt, but it is difficult. Therefore, the clad material 16 having such a shape? f: When manufacturing, the apparatus shown in FIG. 3 is a peter. That is, the device of FIG. 3 does not have a belt.

Therefore, the uneven shape shown in FIG. 4 can be used for both rolls 1 and 2. In the method of the present invention, the material of the metal ribbon 7 is melted in the melting tank 18 on the side of the roll 2, and the molten metal 20e is melted in the roll 2.
This is a method of scraping it up and cladding it with the amorphous metal ribbon 6. In this case, the temperature of the roll 2 is controlled by the heater 4.
Heat it to a lower temperature than the zero temperature. This has two purposes: to improve the wettability between the roll 2 and the molten metal 20, and to prevent the temperature of the molten metal 20 adhering to the roll 2 from dropping. It goes without saying that the temperature of the roll 1 should be higher than the melting point of the clad metal ribbon 7 as described in FIG. The other configurations are the same as in FIG. 1. Roll 17 is a winder. Although the surface shape of the roll 1.2 is not shown, it can have various uneven shapes other than the shape shown in FIG.

Example 1 Figure 7 shows a cross-sectional photograph in the width direction of a clad material manufactured using the apparatus of the present invention (Figure 1) (the lower part of the metal ribbon is omitted. The manufacturing conditions were amorphous. N1as on metal ribbon
Crso P+oB+II (a'%) composition thickness 20μ
Using a m1 width of 50 holes, the metal ribbon has a melting point of 230c"t'
6 70Pb-308n (wt%) thickness is 2 ends width 5
A noise of 0 mm was used. Mouth to hole 1゜2 is φ300tra
n alloy tool steel M is used, and the number of rotations of roll 1°2 is 60.
rpm. The temperature of the heater 5 was 200C, and the temperature of the roll 1 was 300C.

The temperature of roll 2 is 20 QC. Note that the belt IO was made of steel with a 0.3 end. From Figure 7, amorphous metal ribbon 6
It is clear that the metal (pb-an) 7 is embedded in the pores 21. It should be noted that although I tried to peel off the glue 2 material, the amorphous ribbon 6 was torn off. From this, it is estimated that the clad material produced by the method of the present invention has considerable adhesive strength.

Example 2 Figure 8 shows a metal ribbon (Pb-8n) between the amorphous metal ribbons 6.
7 is shown in a longitudinal cross-section of cladding.

The manufacturing conditions were such that the temperature of roll 1.2 was the same as 3000. Other conditions are the same as those in FIG.

There is no problem if the material to be glued has good wettability with amorphous gold, such as solder or metal, but if the material has poor wettability, the amorphous metal will be removed before passing through rolls 1 and 2. When a wettability promoter and an oxide film remover are applied between the ribbon 6 and the metal ribbon 7, the adhesion effect is increased.

Example 3 FIG. 9 shows a longitudinal cross-section of a cladding material manufactured by the apparatus of the present invention shown in FIG. The manufacturing conditions were N fas Crho P+a B1° (at
%) The composition was 23 μm thick and 100 mm wide, and the metal ribbon was made of pure Pb with a thickness of 3 mm and a width of 100 mm. roll 1
．． Roll 2 is made of alloy tool steel with a diameter of 300 m and an uneven (triangular) surface.

The number of revolutions in step 2 is 30 rpm to deform the amorphous metal ribbon.
The speed was set to m. The temperature of roll l is 350C1 roll 2
The temperature was 320C. This shape was manufactured as a supporting plate for the electrodes of methanol batteries, for which needs have been increasing recently. The properties required for the supporting plate are electrical conductivity and corrosion resistance (
It has excellent resistance to sulfuric acid. Conventionally, graphite has been used, but graphite's low strength makes it difficult to process thin sheets in complex ways, and it is difficult to process them unless they are made thicker. therefore,
It has problems such as not being able to be miniaturized and the processing cost being high. Therefore, we focused on amorphous metals that have excellent corrosion resistance. However, as mentioned above, the thickness of amorphous metal is 20~
Only a thin strip of 50 μm could be produced, and the strength as a dividing plate was insufficient, leading to problems. This problem can be solved by the two-pronged method of the present invention, and the need for this problem has been increased. The cladding device of the present invention can be applied not only to an amorphous metal ribbon and a metal ribbon, but also to a combination of an amorphous metal ribbon, glass, resin, etc., and two metal ribbons glued together.

〔Effect of the invention〕

The method of cladding an amorphous metal ribbon in an amorphous state according to the present invention has the effect of expanding new applications of the amorphous metal ribbon.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a cladding device according to Example 1.2 of the present invention, FIG. 2 is a cross-sectional view in the width direction of an amorphous metal ribbon, and FIG. 3 is a diagram showing a cladding device according to Example 3 of the present invention. Figure 4 is a front view of the roll of the present invention, Figures 5 and 6 are the third diagram of the roll of the present invention.
Figures 7 and 8 are longitudinal cross-sectional views of the clad material manufactured using the apparatus shown in the figure; Figures 7 and 8 are longitudinal sectional views of the clad material manufactured using the apparatus of Example 1.2 of the present invention; 1 shows a longitudinal cross-sectional view of a cladding material manufactured by the apparatus of Example 3 of the present invention. l...roll, 2...roll, 3...heater, 4...heater, 5...heater, 6...amorphous metal ribbon, 7...
...Metal ribbon, s...roll, 9...roll, 10
...belt, ll...roll, 12...roll%
13...Roll, 14...Cooling Java, 15...
・Drying blower, 16... Clad material, 17... Roll, 18... Melting tank, 19... Heater, 20...
・Molten metal, 21...Vacancies. Hou 3rd 4th country, 5th Nittaru-2610

Claims (1)

[Claims] 1. In a method of cladding an amorphous metal ribbon to a metal in an amorphous state, the cladding temperature of the amorphous metal ribbon and the metal is heated below the embrittlement temperature of the amorphous metal. A method of cladding an amorphous metal ribbon onto a metal, characterized by pressing. 2. A method for cladding an amorphous metal ribbon onto a metal according to claim 1, characterized in that the heating is carried out at a temperature of -2°C, the embrittlement temperature of the amorphous metal. 3. A method for cladding an amorphous metal ribbon with metal according to claim 1, wherein at least one side of the amorphous metal ribbon has microscopic pores. 4. A method for bonding an amorphous metal ribbon to a metal according to claim 1, characterized in that the cladding metal is a low melting point metal having a temperature below the embrittlement temperature of the amorphous metal. 5. Claim 1, in which the surface of the metal in contact with the amorphous metal ribbon is heated to just above the melting point and to a semi-molten state for cladding.
Method of cladding amorphous metal ribbon with metal. 6. A method for cladding the amorphous metal ribbon with metal according to claim 1, wherein the cladding means involves passing the amorphous metal ribbon through a gap between rolls. 7. A method for cladding an amorphous metal ribbon onto a metal according to claim 1, characterized in that an endless pel is used as a means for conveying the amorphous metal ribbon and the metal to a rolling roll. 8. A method for cladding an amorphous metal ribbon with metal according to claim 5, characterized in that the rolling roll has an uneven surface shape.