JPH01138078A - Manufacture of metal clad by cold rolling - Google Patents

Abstract

PURPOSE:To finely and inexpensively join even materials with low clad ratio or foils together by brushing the joining surfaces of the materials before cladding and interposing an Al plated layer between base metal and cladding material to roll these. CONSTITUTION:A steel plate and an Al plated stainless steel plate or nonferrous metal are used as the base metal A and the cladding material B respectively. The base metal A and the cladding material B are delivered from an unwinding reel 1 and from an unwinding reel 2 respectively. After an oxide film, impurities, etc., on the surface of the base metal A delivered from the rewinding reel 1 are removed by a brushing roll 15, the cladding material B is superposed on the base metal A and rolled and clad at 20-50% draft. Accordingly, the clean and fresh metal surfaces are stuck fast to each other and the base metal A and the cladding material B can be clad with high joining strength.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for manufacturing metal cladding by cold rolling.

The metal cladding according to this invention can be used for storage tanks, pressure vessels,
Used as a material for construction, etc.

(Prior Art) Clad materials are used as building materials such as roofing materials and interior materials, as well as materials for storage tanks and pressure vessels. Generally, cladding materials are manufactured by crimping a mating material such as titanium or stainless steel, which has excellent corrosion resistance and aesthetic appearance, onto one or both sides of a base material made of ordinary steel.

When two metal materials are placed one on top of the other and pressurized to plastically deform the bonded surfaces, any contaminated layers such as oxide films are destroyed, and the clean new metal surfaces are brought into close contact with each other. As a result, the atoms of both materials share each other's free electrons, forming a metallic bond and joining the materials. Crimping takes advantage of this phenomenon.

Conventionally, the explosion bonding method or the rolling crimping method has been widely used as a method for crimping base materials and laminate materials. As a method for manufacturing such metal cladding, for example, Japanese Patent Publication No. 4B-1262
There are techniques disclosed in Japanese Patent Publication No. 57-7830, ``Method for manufacturing clad strips by cold rolling and crimping'', ``Method for manufacturing laminated plates of 5R aluminum and stainless steel or steel''.

(Problem to be solved by the invention) In order to obtain sufficient bonding strength between the base material and the laminate material,
High temperatures and high bonding pressures must be applied to both materials. Therefore, in the production of rat materials with a small cladding ratio (cladding material/base material), such as a cladding ratio of 01, or in the production of thin cladding materials in which both the base material and the cladding material are foil, the above-mentioned conventional When using the explosion bonding method or the hot rolling pressure bonding method, the laminated material would tear, making it difficult to join.

SUMMARY OF THE INVENTION Therefore, the present invention provides a method of manufacturing a metal cladding that can be beautifully and inexpensively joined even with materials having a small rad ratio or foil.

(Means for Solving the Problems) The method for manufacturing a metal clad by cold rolling according to the first invention provides 82 plating with a thickness of 05 to 50 μm on the bonding surface of one of the base material and the laminate material. After applying and brushing the joining surface of the other material, both materials are overlapped and rolled and crimped at a rolling reduction ratio of 20 to 50*.

If the thickness of the AM plating is less than 0.5 μm, the A2 plating may break during rolling and come into direct contact with the base material and the laminate, resulting in insufficient bonding. Furthermore, if the thickness of AM plating is 509 m or more, the bonding strength will be saturated, and plating thicker than that will be wasted.

The method for manufacturing a metal cladding by cold rolling according to the second invention includes applying 8L plating to a thickness of 0.5 to 50 μm on the bonding surface of one of the base material and the laminate material, and bonding the other material. Brush the surface and apply 100% of both materials.
Heat to ~200℃ and stack 20~50*
Rolling and crimping with a reduction rate of .

If the heating temperature is less than 100°C, the diffusion of metal atoms that speeds up the bonding will not be sufficiently promoted, and if it exceeds 200°C, oxidation of the base material, laminate material, or 8U plating layer will proceed rapidly.

Heating is performed using, for example, an electric heating furnace, an infrared heating furnace, or a gas heating furnace provided immediately before the rolling mill.

The method for manufacturing metal cladding by cold rolling according to the third invention involves interposing a clean AM pipe between the base material and the laminate material, brushing the joint surfaces of both materials, and then overlapping the two materials for 20 to 20 minutes. Rolling and crimping is carried out at a rolling reduction of 50%.

The thickness of the foil is the same as the thickness of the above A2 plating, and the reason for its limitation is also the same as in the case of Affi plating.

The method for manufacturing metal cladding by cold rolling according to the fourth invention involves interposing a flattened foil with a clean surface between the base material and the laminate material, brushing the bonding surfaces of both materials, and then rolling both materials with AM foil. They are heated to 100 to 200°C, overlapped, and rolled and crimped at a rolling reduction of 20 to 50%.

In the first to fourth inventions, the base material is a steel plate such as ordinary steel or stainless steel, and the mating material is a stainless steel plate or a nonferrous metal plate such as titanium, nickel, copper, or the like. Two or more laminates made of different materials may be overlapped and crimped onto the base material. Base material thickness is 5.0~0.05m
m, and the thickness of the laminated material is 3.0 to 0.0] III
It is about m. Further, if the rolling reduction ratio is less than 2096, sufficient crimp strength cannot be obtained, and if it exceeds 5096, the laminated material may break.

(Function) In this invention, the bonding surface of the material is brushed during the crimp i)f. In addition, the 8M plating layer or AM foil interposed between the base material and the laminate has a lower yield point than the base material and the laminate, and even if it is cold or warm rolled, the AL;
The plating layer or A2 foil is easily plastically deformed. Therefore, since it is in close contact with the clean new metal surface, the base material and the laminate material can be crimped together with high bonding strength.

In addition, by heating the base material, laminate, Ann-muffed layer, or Ann foil, etc., the diffusion rate of metal atoms increases, and the yield point decreases, making it easier to roll the material at a low reduction. plastically deforms. Therefore, high bonding strength can be obtained.

(Example T) FIG. 1 is a block diagram of equipment for carrying out the methods of the first and second inventions.

The rolling mill 5 is a four-high rolling mill consisting of a work roll 6 and a backup roll 7. The diameter of the work roll is 1
501TllTl, the body length is 280mm, the diameter of the backup roll is 300m+n, and the body length is 300mm.
It is mm. Unwinding reels 1 and 2 and a take-up reel 9 are arranged on the inlet and outlet sides of the rolling mill 5, respectively.

Deflector rolls 1 are installed on the inlet and outlet sides of the rolling mill 5, respectively.
1 and 12 are installed. Furthermore, a flushing roll 15, guide rolls 17 and 18, and an electric heating furnace 21 are arranged in this order on the inlet side of the rolling mill 5. The brushing roll 15 has a large number of steel wires planted therein.

In the above equipment, the base material A is edged from the unwinding reel 1, and the laminate material B is edged from the unwinding reel 2. Base material A is 2. OtX 50W ordinary steel coil. Laminating material B is 0, o5tX with 20 μm thick Yame plating on one side.
50W stainless steel coil (SO5304). After the oxide film, impurities, etc. on the upper surface of the base material A fed out from the unwinding reel 1 are removed by a flushing roll 15, the base material A and the composite material B are overlapped and rolled. Further, as a comparative example, base material A (20 inches x 50 W) and ordinary steel coil mating material (0.05 t x 50 W) (7) stainless steel coils not plated with AM were overlapped and rolled.

Table 1 shows the experimental results using the equipment described in ``1''.

Table 1 Bonding degree evaluation ◎: Curvature 3 n+n+, no peeling at 180' bend ○: Curvature 30 mm, peeling at 180' bend 10
* Below △2 curvature 30m+, +806 bending and peeling 11tlO!
2× Not joined (Example II) FIG. 2 shows an example of equipment for carrying out the methods of the third and fourth inventions. Note that the members shown in FIG. 2 that are substantially the same as those shown in FIG. The difference from the equipment shown in FIG. 1 is that an unwinding reel 3, a flushing roll 16, and a guide roll 19 are newly provided on the inlet side of the rolling mill 5, and a deflation lever is installed on the outlet side of the unwinding reel 2. This is because the roll 13 is provided. Note that the specifications of the rolling mill 5 shown in FIG. 2 are the same as those of the rolling mill shown in FIG. 1.

In the above equipment, the base material A is fed out from the unwinding reel 1, the mating material B is fed out from the unwinding reel 3, and the intermediate material C is fed out from the unwinding reel 2. Base material A is 0.5tX 50
W is a stainless steel coil (sus 430),
Laminating material B is a 0.05tX 50W titanium coil (JT
S type 2). Also, intermediate material C is 0.0+6tX5
It is a 0W Hem foil coil. After removing the oxide film, impurities, etc. from the "-" side of the base material A that has been removed from the unwinding reel 1, and from the lower surface of the laminate material that has been edged out from the unwinding reel 1, using brushing rolls 15 and 16, Intermediate material C is inserted between material A and laminate material B, and the materials are overlapped and rolled. In addition, as a comparative example, 5IJS of m material A (2, OtX 50W>
A titanium coil of a laminate material (0.05t, X50W) was superimposed on the 430 coil and rolled.

Table 2 shows the experimental results using the above equipment.

Table 2 (Joint degree evaluation symbols are the same as Table 1) (Effects of the invention) In this invention, the joint surfaces of the materials are brushed before crimping, and an Al plating layer is added between the base material and the laminate material. Alternatively, rolling is performed with A blanking interposed. Therefore, the base material and the laminate material can be crimped to each other with high bonding strength and in close contact with the clean new metal surface.

In addition, by heating the base material, laminated material, No. 1 plating layer, or standoff, etc., the diffusion rate of metal atoms is increased and the yield point is lowered, so even with a low reduction blade, high No. 1 joint strength can be obtained. It's coming.

As a result, according to the present invention, the range of cladding ratios that can be bonded is wide, and a continuous and stable bonding state can be obtained in a coiled state, making it possible to manufacture metal cladding at a high yield and at low cost. . Also, the metal cladding surface is beautiful. Incidentally, the conventional explosion bonding method can only be applied to thick cut plates and base materials that have a large cladding ratio. Further, the hot rolling method requires equipment that provides a vacuum or an atmosphere equivalent to it. .

[Brief explanation of the drawing]

FIGS. 1 and 2 are equipment configuration diagrams showing an example of equipment for implementing the method of the present invention. 1 to 3... Rewinding reel, 5... 4-heavy rolling mill, 6...
・Work role, 7... Backup role, 9...
・Take-up reel, 11, 12, 13...deflector
Roll, 15.16...Brushing roll, 17.
1B, 19...Guytrol, 2t...Electric heating furnace,
A: Base material, B: Laminated material, C: Intermediate material.

Claims (4)

[Claims] (1) In the manufacture of metal cladding, in which a steel plate is used as a base material and a stainless steel plate or a non-ferrous metal plate is used as a laminate material, the two materials are overlapped and rolled and crimped. A method for manufacturing a metal clad by cold rolling, which comprises applying Al plating and brushing the joint surface of the other material, and then overlapping the two materials and rolling and pressing them at a rolling reduction ratio of 20 to 50%. (2) In the manufacture of metal cladding, in which a steel plate is used as a base material and a stainless steel plate or a non-ferrous metal plate is used as a laminate material, and both materials are overlapped and rolled and crimped, a thickness of 0.5 to 50 μm is applied to the joint surface of one of the materials. Apply Al plating and brush the joint surface of the other material, and
1. A method for manufacturing a metal clad by cold rolling, which comprises stacking the metal cladding sheets heated to .degree. C. and rolling and pressing them at a rolling reduction of 20 to 50%. (3) In the manufacture of metal cladding, in which a steel plate is used as a base material and a stainless steel plate or a nonferrous metal plate is used as a laminate material, and both materials are overlapped and rolled and crimped, a clean Al foil is interposed between the two materials, and both materials are After brushing the joint surface of
A method for manufacturing a metal clad by cold rolling, which comprises stacking both materials and rolling and pressing them at a rolling reduction of 20 to 50%. (4) In the production of metal cladding in which a steel plate is used as a base material and a stainless steel plate or a non-ferrous metal plate is used as a laminate material, and both materials are overlapped and rolled and crimped, an Al foil with a clean surface is interposed between the two materials, A metal clad made by cold rolling, characterized in that after brushing the joint surfaces of both materials, both materials are heated to 100 to 200°C together with Al foil, overlapped, and rolled and crimped at a rolling reduction of 20 to 50%. manufacturing method.