JPH0675947B2 - Method for manufacturing damping metal plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a base metal such as a diamond cutter or a chip saw used as a high-speed rotating body, gears, or a vibration damping property in an operating structure such as an automobile. Structural materials required,
The present invention relates to a method for producing a vibration-damping metal plate suitable for use as a member that requires vibration resistance as well as heat resistance, weldability, and toughness.

[Conventional technology]

12Cr-3Al-F has long been used as a material that requires vibration damping.
Those using magnetostriction represented by e, Mn-Cu alloys, etc. are known, and in recent years, Saint-Germany steel sheets with plastic materials sandwiched between steel sheets have been put into practical use.
The former has the drawback that the vibration damping performance deteriorates due to plastic working and temperature rise, and the latter has poor heat resistance as well as poor weldability due to the lack of conductivity due to the use of plastic materials. I got it.

Therefore, some of the inventors of the present invention have conducted research to obtain an excellent vibration-damping metal plate, and have a minute width in which the metal plate and the metal plate that are superposed have a substantially uniform distribution therebetween. A contact part is formed in which the metallurgical bond due to diffusion between the insert metal and the both metal plates is a main bonding factor, and the parts other than the bond part are not metallurgically bonded and are in contact with each other. We have developed a vibration-damping metal plate in which the total of the cut surfaces of the joints in the same plane as the surface is 0.5 to 50% of the area of the metal plate (see JP-A-63-246238). Then, the manufacturing method is such that the insert metal is sandwiched between the metal plates in a uniform distribution state and sandwiched to form a laminated metal plate, and the surface pressure is applied between the metal plates under an inert atmosphere or reduction. The diffusion was carried out between each metal plate and the insert metal under a neutral atmosphere. In the case of an industrial mass-production method of annealing a laminated metal strip coil wound with a coiler while sandwiching an insert metal between these two long metal plates, that is, metal strips, a surface pressure is applied between the metal strips. The specific method of giving the metal foil was a method in which a tension reel was used in a coiler and the metal strip was wound in a state in which a high tension was generated to give a surface pressure between the metal strips.

However, in the surface pressure imparting method using only such a tension reel, the surface pressure may not always be sufficient depending on the thickness and type of the metal strip or insert metal, and the bonding strength is further increased. In order to achieve this, it has been desired to develop a method of manufacturing a vibration-damping metal plate that can be annealed under a higher surface pressure.

[Problems to be Solved by the Invention]

An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to configure a method for manufacturing a vibration-damping metal plate so that annealing can be performed under a higher surface pressure.

[Means for Solving the Problems]

As a result of various studies by the present inventors, a thick cylinder having a large coefficient of thermal expansion is used as a winding core of the laminated metal strip coil, and a band having a small coefficient of thermal expansion is wound around the outer periphery of the laminated metal plate coil to solve the above problems. The present invention has been made by researching that the above can be achieved.

Hereinafter, a method for manufacturing a vibration damping metal plate according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is an explanatory view of a laminated metal strip coil manufacturing process in a method for manufacturing a vibration damping metal plate according to the present invention, FIG. 2 is an explanatory diagram of a laminated metal strip coil appearance in the case of carrying out the same annealing, and FIG. A cross-sectional explanatory view schematically showing an example of a vibration damping metal plate manufactured by the method of the invention, FIGS. 4 and 5 show distribution states when insert metals having different shapes are arranged on one metal plate. In each figure, (a) is a plan view, (b) is a cross-sectional view taken along the line AA and BB in (a), and FIG. 6 is a perspective view showing a sound pressure level measuring device. , FIG. 7 and FIG. 8 respectively show the shape of the test piece for measuring the shear load. In each figure, (a) is a front view (b).
Is a side view.

The method of manufacturing the vibration-damping metal plate 1 according to the present invention is such that, except for the winding core, the insert metal 4 having a minute width between the metal bands 2 and 3 is uniformly distributed and has a unit area as shown in FIG. The ratio of the total contact area with the metal strip to the above unit area (hereinafter sometimes referred to as the total contact area ratio) is 0.5 to 5
It is sandwiched so as to be 0% and wound around a winding core with high tension to form a laminated metal strip coil 5 between the metal strips 2 and 3 and the insert metal 4 under an inert atmosphere or a reducing atmosphere. There is no difference from the prior art in that annealing is performed at a temperature at which diffusion occurs. The feature of the present invention is to use a thick-walled cylinder 10 made of a material having a coefficient of thermal expansion larger than any of the two metal strips 2 and 3 as a winding core, and wrap a laminated metal plate around this with a high tension. As shown in FIG. 2, a band coil 5 is formed, and a band 12 made of a material having a coefficient of thermal expansion smaller than that of the above-mentioned two metal bands 2 and 3 and having substantially the same width as the metal bands 2 and 3 is provided. The end portions of the laminated metal strip coil 5 are fixed so that they do not become loose when they are wound up and taken out from the winder, and are annealed to form a band-wound laminated metal strip coil 5 '. Is to be annealed in a state of being firmly sandwiched by an object larger than and smaller than the metal strips 2, 3.

Next, the first specific manufacturing method of the vibration damping metal plate according to the present invention will be described.
This will be described with reference to FIGS.

As shown in FIG. 1, while the metal strip 2 is unwound and run from the coil 6 set on the payoff reel, an insert metal supply device 8 (whether the insert metal 4 is a minute body such as a grain or a small piece, Use a suitable insert metal feeding device depending on whether it is an elongated elongated body. The example shows a powder spreader for metal powder) so that the total contact area ratio of insert metal 4 is 0.5 to 50%. To
Supply with almost even dispersion. On the other hand, the other metal strip 3 is supplied from the coil 7 and, after passing through the deflector roll 9, the insert metal 4 is sandwiched between the metal strips 2 and 3, and the stacked metal strip coil 5 is formed as it is. Wind up on a thick cylinder 10. In this case, in order to apply a surface pressure between the metal strips 2 and 3, a tension reel is used for the coiler, and the laminated metal strip is wound around the thick-walled cylinder 10 in a state where high tension is applied. Further, a band 12 is supplied from the band coil 11 separately prepared and wound on the laminated metal band coil 5, and welding or caulking is performed to prevent loosening when the end of the band 12 is removed from the reel. Then, they are fixed to each other to form a band-wound laminated metal band coil 5 '. The characteristics used as the selection criteria for the materials of the thick-walled cylinder 10 and the band 12 are
Hot strength is also important, but the most important is the coefficient of thermal expansion. That is, the former has a larger coefficient of thermal expansion than either of the two metal bands 2 and 3 forming the laminated metal band, and the latter has a smaller coefficient of thermal expansion than either of the two metal bands 2 and 3. Select. For example, if all of the metal bands 2 and 3 are ordinary steel, the thick cylinder 10 is a large austenitic stainless steel having a large coefficient of thermal expansion, and the band 12 is a martensite stainless steel having a small coefficient of thermal expansion. To use. The appearance of the obtained band-wound laminated metal strip coil 5 is
As shown in FIG. 2, a laminated metal strip is wound on a thick-walled cylinder 10 having a large coefficient of thermal expansion to form a laminated metal strip 5.
A band 12 having a small coefficient of thermal expansion is wound around the outer circumference.

The band-wound laminated metal strip coil 5'is charged into the annealing furnace as it is and annealed at an appropriate temperature in an inert atmosphere or a reducing atmosphere. At that time, thick cylinder 10 and band 12
The laminated metal strip coil 5 sandwiched between the two is in a state of being strongly pressed due to the difference in the thermal expansion coefficient between the two, and the two metal strips 2 and 3 forming the laminated metal strip are always annealed during annealing. A high surface pressure acts, which results in a sufficient diffusion bonding between the metal strips 2, 3 and the insert metal 4 to provide a high bonding strength.

The following description of each item is common to the above-mentioned conventional technique, but will be described for the sake of practicing the present invention.

As the metal plates 2 and 3, ordinary steel plates such as low carbon steel plates, carbon tool steel plates, special steel plates such as stainless steel plates and nickel chrome molybdenum steel plates, non-ferrous metal plates such as aluminum plates, steel plates, titanium plates and nickel plates, as described above. It is possible to use various metal plates such as ordinary steel plates, special steel plates, non-ferrous metal plates, plated metal plates, and cladding metal plates obtained by laminating these various metal plates. The metal plates 2 and 3 do not have to be the same metal plate,
It goes without saying that the vibration damping metal plate 1 may be a combination of metal plates made of different materials depending on the purpose of use.

The type of chemical substance of the insert metal 4 having a minute width, which is present between the metal plates 2 and 3, is not particularly limited as long as the metal plates 2 and 3 can be diffusion bonded. It is not necessary to particularly select a low melting point metal having vibration damping properties. However, regardless of the kind of metal of the metal plates 2 and 3, a metal that can be satisfactorily joined by diffusion without forming a brittle alloy or the like, for example, a metal of the same component or a metal such as Cu, Ni, or Fe. It is better to select it as insert metal 4.

As the shape of the insert metal 4, a powder or a small piece such as a metal powder or a fine piece of a metal foil, an elongated long body such as a metal fiber or a metal net, or an aggregate thereof is used.

The distribution state in which the insert metal 4 is uniformly dispersed differs depending on its shape. For example, when the insert metal 4 is a minute body such as a granular or small piece having a minute diameter i as shown in FIGS. 4 (a) and 4 (b), FIG. 4 (a) is used.
As shown in FIG. 5 (a), when the elongated body having a minute width w as shown in FIGS. 5 (a) and 5 (b) is used as the insert metal 4, it is uniformly dispersed. Are evenly distributed over In this case, if the width w of the insert metal 4 is excessively large, the total contact area with the metal bands 2 and 3 is limited to a certain range as described above. Since the distribution of the joints formed is rough and the uniformity desired as a vibration-damping metal plate is significantly reduced, it is appropriate that the width w of the insert metal 4 be about 5 mm or less. The limit of the smaller width w is not particularly limited, but is limited in terms of the manufacturing technology of the insert metal 4.

Next, the thickness of the insert metal 4 will be described. In the present invention, it is important for the damping property that the two metal strips 2 and 3 are in contact with each other except for the joint portion by the insert metal 4 existing between them. (For example, h in Fig. 4 (b), Fig. 3 (b))
If k) is excessively thick, contact is insufficient even if some deformation is taken into consideration, which is not preferable, and if it is too thin, a gap is likely to occur between the insert metal 4 and the metal bands 2 and 3. Since the diffusion bonding becomes difficult, the thickness of the insert metal 4 is preferably about 5 to 500 μm.

In order to make the insert metal 4 exist in a uniform distribution state between the metal strips 2 and 3, a method of carefully and uniformly supplying the metal strips 2 and 3 in the laminated metal strip coil manufacturing process shown in FIG. In addition, the insert metal 4 is attached to one or both of the metal strips 2 and 3 in advance by, for example, plating, vapor deposition, ion plating welding, etc. on the surface of the metal strips 2 and 3 at a predetermined area ratio. You may stay.

The atmosphere for annealing is selected from an inert gas such as Ar, an inert atmosphere such as a vacuum, and an inert atmosphere such as a H ₂ —N ₂ mixed gas. If the atmosphere during annealing is oxidizing, not only the oxide scales are generated in the metal bands 2 and 3 themselves to deteriorate the surface, but also the progress of diffusion is significantly hindered.

The appropriate temperature for causing diffusion between the metal strips 2, 3 and the insert metal 4 (hereinafter sometimes referred to as an annealing temperature) depends on the type of the metal strips 2, 3 or the insert metal 4 used. Different (specific examples are shown in Examples). If the annealing temperature is too low, the annealing time will be extremely long in order to obtain sufficient bonding strength. If the annealing temperature is too high, even the portions where the metal strips 2 and 3 contact each other are in a metallurgically joined state without the insert metal 4, and the laminated metal strip coil 5 is formed. Metallurgical bonding may occur between the layers of the metal strips, and if the annealing temperature rises above the melting point of the insert metal 4, the insert metal 4 that is in a liquid state is between the metal strips 2 and 3. It becomes difficult to control the total proportion of the contact area of the insert metal 4 with the metal band 2 or 3 so as to fall within a predetermined range.

In addition, in order to increase the degree of diffusion between the insert metal 4 and the metal strips 2 and 3 to increase the bonding strength, if the annealing temperature is increased, the annealing time is lengthened, or the surface pressure is increased,
For the purpose of preventing metallurgical joining due to diffusion occurring between the portions of the metal strips 2 and 3 that are simply brought into contact with each other or between the layers formed when the laminated metal strip is wound into a coil, for example, It is advantageous to apply a release agent consisting of metal oxide powder or the like to these contact surfaces.

In the vibration-damping steel plate thus obtained, a joint is formed mainly by metallurgical joining due to diffusion between the insert metal 4 and both metal bands 2 and 3 in common. (Joining with such a joint is called diffusion joining). On the superposed surfaces of the metal strips 2 and 3, except for the above-mentioned joining portion, they are abutted in a state where they are not metallurgically joined as shown in FIG. The ratio of the total cross-sectional area of the joint per unit area on the same plane as the contact surface (hereinafter, sometimes referred to as the total cross-sectional area of the joint) to the unit area (hereinafter, simply the ratio of the total cross-sectional area of the joint) Insert metal 4 is a metal strip
Almost the same as the total contact area ratio when distributed between 2 and 3,
It is in the range of ~ 50%. The cross-sectional area of the entire joint is determined by forcibly separating the damping metal plate 1 onto the original two metal plates, and the size and quantity of each insert metal 4 that appears on the peeling surface of a certain area (in the case of a minute body Can be obtained by measuring the distribution by diameter and the width and length in the case of a long body to calculate the area. Thus, the vibration-damping metal plate 1 manufactured by the method of the present invention is a kind of composite metal plate, which is cut to an appropriate size and used.

〔Example〕

Hereinafter, a method for manufacturing the vibration damping metal plate according to the present invention will be specifically described with reference to examples.

The damping performance shown in each of the following examples is as follows. As shown in FIG.
A hammer that is suspended and held by the bearing and is rotatably attached to the upper cross beam of the column frame 13 by a bearing 16.
The sound pressure level measured by the sound level meter 18 was evaluated by dropping the 15 from the horizontal state and receiving the impact sound of the vibration-damping metal plate X by the hammer 15 with the microphone 17.

The bonding strength as a mechanical property is shown in Fig. 7 (a),
(B) Or, as shown in (b) and (b) of Fig. 8, scrape off the metal plate on each side of the vibration-damping metal plate with a width of 20 mm to remove the two slits.
It is evaluated by the shear load obtained from the tensile test results of the test pieces provided at intervals of 10 mm.

Examples 1 to 5, Comparative Examples 1 to 5 Examples in which ordinary steel plates are used as the metal strips 2 and 3 will be described.

First, two metal strip coils 6 and 7 (single weight of about 1 ton) of ordinary steel cold rolled strip steel (thickness 0.8 mm, width 300 mm) having the chemical composition shown in Table 1 as the metal strips 2 and 3 A small piece of the same material as the cold-rolled steel strip as metal 4 (thickness 0.2 mm, width 2 mm, length 2 m
m) prepared. In addition, the thick cylinder 10 has an inner diameter of 508 mm,
A SUS304 cylinder with an outer diameter of φ558 mm, a wall thickness of 25 mm, and a width of 350 is used as a band.
Stainless steel strip consisting of SUS410 as 12 (plate thickness 1.6 mm, width
We prepared a coil of 300 mm) (single weight about 500 kg). Plain steel, S
The coefficient of thermal expansion of US304 and SUS410 is shown in Table 2 (including brass used as metal strips 2 and 3 in Examples 6 to 7). Compared with the coefficient of thermal expansion of ordinary steel, SUS304 is large and SUS410 is small.

Using each of the above materials, a laminated metal strip coil 5 wound around a thick cylinder 10 was manufactured according to the process shown in FIG. That is, the insert metal 4 is placed on one of the ordinary steel metal strips 2.
Is distributed almost evenly so that the total contact area ratio shown in Table 3 is obtained, and while the other ordinary steel metal strips 3 are overlapped to form a laminated metal strip, a tension of about 10 tons is applied and a thick-walled cylinder is applied. I wound it up to 10. At this time, alumina fine powder dispersed and mixed in an organic solvent was applied to one surface of the laminated metal strip before the winder so that the metal strips were not joined to each other in the subsequent annealing. When the laminated metal strip is wound up to a winding thickness of about 200 mm, one metal strip coil 6 of the ordinary steel strip steel is separated and the other steel strip coil 7 is tensioned to the ordinary steel strip steel and the SUS410 of The metal strip coil 7 was cut off when the tip of the band 12 was sandwiched and wound twice, and then the band 12 was wrapped around the outer circumference. By doing so, the metal bands 2 and 3 and the band 12 that are unwound from the metal band coils 6 and 7.
It was possible to wind it with a constant tension without causing any looseness. Band 12 full winding thickness about 250 mm
After winding up, the edge part of the outermost band 12 is partially welded to prevent winding looseness, and then the band 12 is cut and the obtained band-wound laminated metal band coil 5'is taken out from the winder. It was

Next, this band-wound laminated metal strip coil 5'is loaded into a bell-shaped furnace as it is, and annealed by soaking at 900 ° C for 5 hours in a reducing atmosphere containing CO gas to manufacture a damping metal plate 1. (Examples 1-5).

In addition, it is wound directly on the coiler without using the thick-walled cylinder 10 and the band 12, and partial spot welding is performed on the edges of the innermost and outermost laminated metal strips so that loosening does not occur when taken out from the coiler. The laminated metal plate coil 5 was made under the same conditions and using the same materials as those in the above-mentioned examples except that
Was manufactured and annealed to obtain a damping metal plate (Comparative Examples 1 to 1).
5).

With respect to the vibration damping metal plates obtained in the above Examples 1 to 5 and Comparative Examples 1 to 5, the vibration damping property (sound pressure level) and the bonding strength (shear load) were examined by the method as described above, Third
The results in the table were obtained.

Table 3 shows that the vibration-damping metal plates 1 obtained in Examples 1 to 5 are slightly superior in vibration damping property to those of Comparative Examples 1 to 5, respectively, but the bonding strength is much higher. It is understood that there is.

Examples 6 to 7 and Comparative Examples 6 to 7 Next, examples using metal bands made of brass as the metal bands 2 and 3 will be described. Two metal strip coils of metal strip (thickness 1.0mm, width 250mm) made of brass with chemical composition shown in Table 4 6,7
(Length about 50 mm, weight about 100 kg) and Insert Metal 4 (thickness 0.25 mm, width 2 m) consisting of steel plates with the chemical composition shown in Table 5
m, length 4 mm). As the thick cylinder 10 and the band 12, the same ones as in Example 1 were used.

From Table 2, the coefficient of thermal expansion of SUS304 is larger and that of SUS410 is smaller than that of brass.

Similar to Example 1, copper insert metal 4 was sprayed on one brass metal strip 2 substantially uniformly so that the total contact area ratio shown in Table 6 was obtained, and the other brass metal strip 3 was laminated. A metal band was applied to the thick cylinder 10 while applying a tension of about 6 ton and applying fine alumina powder in the same manner as in Example 1. When the winding thickness of the laminated metal strip coil 5 reaches 50 mm, the band 12 is spliced in the same manner as in Example 1 and is wound up until the winding thickness reaches 60 mm, and then the edge portion of the outermost band 12 is welded and stopped. After preventing the winding from loosening, the band 12 was cut to obtain a band-wound laminated metal band coil 5 '.

This was annealed in the same manner as in Example 1 except that the treatment temperature was set to 630 ° C. to manufacture a vibration-damping metal plate 1 (Example 6,
7).

Further, a vibration damping metal plate was obtained in the same manner as in Comparative Example 1 with respect to Example 1 (Comparative Examples 6 to 7).

The vibration damping property and the bonding strength of each of the above damping metal plates were examined, and
The results in the table were obtained.

The vibration-damping metal plate 1 obtained in Examples 6 and 7 from Table 6 is
It can be seen that the joint strength is higher than that of Comparative Examples 6 and 7, respectively.

Example 8 Next, an example using a special steel strip steel and a metal strip of a cladding as the metal strips 2 and 3 will be described.

With the chemical composition (S45C) of steel A in Table 7, thickness 0.8mm, width
250 mm, 250 mm long special steel strip steel, and the chemical composition of special steel and steel C having the chemical composition of steel B (S45C) in Table 7 (S20
C) A steel strip made of a special steel having a total thickness of 1.2 mm and a width of 1 to 1 in the cladding.
A metal band of 250 mm in length and about 250 m in length was prepared. In addition, the thick cylinder 10 and the insert metal 4 are used in the first embodiment.
The same thing as that used in was prepared.

Using these materials, a vibration damping metal plate 1 was manufactured according to the method of the present invention in accordance with Example 1. In this production, a special steel strip steel was used as the metal strip 2 in FIG. 1 and a cladding metal strip as the metal strip 3. The laminated metal strip had a winding thickness of about 200 mm, the band 12 had a winding thickness of about 80 mm, and the tension when wound on the thick-walled cylinder 10 was 12 tons. The insert metal 4 was evenly distributed so that the total area ratio was 2.5%, and the annealing was carried out by soaking at 800 ° C for 10 hours. Although the coefficient of thermal expansion of the clad metal band has not been measured, S45C
And S20C have a thermal expansion coefficient of 15.3 × 10 ^-6 (/ ℃),
15.1 × 10 ^-6 (/ ° C), both of which are thick-walled cylinder 10 made of SUS3
It was between 04 and Band 12 SUS410.

The vibration damping property and the bonding strength of the obtained vibration damping metal plate 1 are shown in Table 8 and the bonding strength is sufficiently high.

[Effects of the Invention] As described in detail above, according to the method for manufacturing a vibration damping metal plate according to the method of the present invention, the bonding strength of the obtained vibration damping metal plate is very high, and the basic configuration thereof is originally used. Since it also has excellent damping properties, it is possible to reliably manufacture and supply damping metal plates for various structural members that require high bonding strength as well as damping properties. .

[Brief description of drawings]

FIG. 1 is an explanatory view of a laminated metal strip coil manufacturing process in a method for manufacturing a vibration damping metal plate according to the present invention, FIG. 2 is an explanatory diagram of a laminated metal strip coil appearance in the case of carrying out the same annealing, and FIG. Cross-sectional explanatory views schematically showing one example of a vibration damping metal plate manufactured by the method of the invention, FIGS. 4 and 5 show distribution states when insert metals having different shapes are arranged on one metal plate. In each figure, (a) is a plan view, (b) is a cross-sectional view taken along the line AA and BB in (a), and FIG. 6 is a perspective view showing a sound pressure level measuring device. , FIG. 7 and FIG. 8 respectively show the shape of the test piece for measuring the shear load. In each figure, (a) is a front view (b).
Is a side view. In the drawing 1 ... Damping metal plate 2 ... Metal strip 3 ... Metal strip 4 ... Insert metal 5 ... Laminated metal strip coil 5 '... Band wound laminated metal strip coil 6 ... Coil 7 ... Coil 8 …… Insert metal feeder 9 …… Deflector roll 10 …… Thick cylinder 11 …… Band coil 12 …… Band 13 …… Stand frame 14 …… Thread 15 …… Hammer 16 …… Bearing 17 …… Microphone 18 …… Sound level meter X: Composite metal plate h: Thickness of microscopic insert metal i: Diameter of microscopic insert metal j: Center distance of microscopic insert metal k: Grid formation The thickness of the elongated insert metal to be used l …… The interval between the elongated insert metal forming the grid w …… The width of the elongated insert metal elongated body

Claims (7)

[Claims] 1. A ratio of a total contact area between an insert metal and a metal strip having a unit area to the above-mentioned unit by sandwiching an insert metal having a minute width dispersed between two metal strips in a substantially uniform distribution state. In the range of 0.5 to 50%, and a laminated metal strip coil in which the laminated metal strip is wound with high tension and a surface pressure is applied between the metal strips in an inert atmosphere or reduction. A joint that is annealed at a temperature at which diffusion occurs between the insert metal and the two metal strips under a strong atmosphere, and the metallurgical joint due to diffusion between the insert metal and both metal strips is the main joining factor. Is formed and the two metal strips other than the joint are in contact with each other without being metallurgically joined. Greater coefficient of thermal expansion than metal strip Wrap with a high tension around a thick-walled cylinder made of a material, and further wrap a band made of a material having a smaller coefficient of thermal expansion than any of the above metal bands and have almost the same width as the metal band, and fix the end part of the band to the band. A method for manufacturing a vibration-damping metal plate, which comprises forming a wound laminated metal strip coil and annealing the band-wound laminated metal strip coil. 2. The method for producing a vibration-damping metal plate according to claim 1, wherein at least one of the two metal strips is a normal steel strip. 3. The method for producing a vibration-damping metal plate according to claim 1, wherein at least one of the two metal strips is a special steel strip. 4. The method for producing a vibration-damping metal plate according to claim 1, wherein at least one of the two metal strips is a non-ferrous metal strip. 5. The method for producing a vibration-damping metal plate according to claim 1, wherein at least one of the two metal strips is a cladding metal strip. 6. The method for producing a vibration-damping metal plate according to claim 1, wherein the insert metal is in the form of a minute body having a short length. 7. The laminated metal strip is wound on a thick cylinder while applying a release agent on one surface of the laminated metal strip.
A method for manufacturing a vibration-damping metal plate according to.