KR101061876B1 - Multi-layer metal sheet continuous manufacturing method - Google Patents

Abstract

Multi-layer metal sheet continuous manufacturing method according to the invention, the melting step of dissolving the metal in the vacuum induction furnace; A vacuum molten metal forging step of forging a molten metal discharged from the vacuum induction melting furnace with a cold rolling mill to form a base steel sheet; And a hot rolling step of overlapping the base steel sheet and the uncoiled joint steel sheet and hot rolling by hot rolling to bond the hot rolled steel sheet to the base steel sheet. Allow bonding to take place in a vacuum atmosphere.

Description

Method for manufacturing of multilayered metallic materials

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for continuously manufacturing a multi-layered metal sheet, wherein the multi-layered metal sheet produced has a sound interfacial state in which intermetallic compounds and cracks do not occur at the joining interface.

1 is a schematic view showing the manufacture of a multi-layer metal sheet by a multi-layer metal sheet continuous manufacturing method according to the prior art, Figure 2 is a cross-sectional view showing the interface portion of the multi-layer metal sheet produced by the continuous manufacturing method of a multi-layer metal sheet of Figure 1 to be.

Referring to the drawings, according to the prior art manufacturing of the multi-layer metal sheet in the process of joining the base steel plate 1 and the bonded steel sheet (2), the operation is made in the atmosphere containing oxygen.

For this reason, the phenomenon that the surface oxidizes over time in the joining steel sheet 2 which is joined with the base material steel plate 1 occurs.

Thus, the base material steel plate 1 and the joining steel plate 2 whose surface was oxidized make the joining interface part 8 state of the joined multilayer metal plate material into an unhealthy state.

That is, the bonding strength is reduced due to the surface (oxide film) in which the bonding interface portion 8 is oxidized, so that the quality of the multilayer metal sheet as a whole is degraded, such that the multilayer metal sheets are separated from each other and their mechanical properties are degraded. have.

Then, in the process of bonding the base steel plate (1) and the bonding steel sheet (2), and as time passes, the temperature of the base steel sheet (1) is sharply dropped.

Accordingly, in the hot rolling mill 6, the base steel sheet 1 is heated together with the joining steel sheet 2 at a very high temperature, which is not an appropriate temperature for joining, but becomes an overheated temperature, thereby joining the joining process. In this case, the joining interface 8 of the multi-layer metal sheet is unhealthy.

That is, there is a problem that the state of the compound is in an unhealthy state such as the compound 9 between the metals is generated at the joint interface 8 of the multi-layered metal sheet and a large amount of pores are generated or cracks 7 are generated. have.

The present invention has been made to solve the above problems, to provide a multi-layer metal sheet continuous manufacturing method for producing a multi-layer metal sheet to have a healthy interface state without intermetallic compounds and cracks in the joint interface. Has its purpose.

In order to achieve the above object, a multi-layer metal sheet continuous manufacturing method according to a preferred embodiment of the present invention, the melting step of dissolving the metal in a vacuum induction furnace; A vacuum molten metal forging step of forging a molten metal discharged from the vacuum induction melting furnace with a cold rolling mill to form a base steel sheet; And a hot rolling step of overlapping the base steel sheet and the uncoiled joining steel sheet by hot rolling to join the hot rolling with a hot rolling mill, wherein the steps are performed in a vacuum chamber. Allow bonding to take place in a vacuum atmosphere.

Specifically, the alloy sheet manufacturing apparatus utilized in the present invention, a vacuum chamber; A vacuum induction furnace disposed in the vacuum chamber and dissolving a metal; A cold rolling mill forging the molten metal discharged from the vacuum induction furnace to form a base steel sheet; An uncoiler configured to uncoil the wound bonded steel sheet; And a hot rolling mill for overlapping and hot-rolling the bonded steel sheet uncoiled from the uncoiler to the base steel sheet. The bonding of the bonded steel sheet to the base steel sheet is performed in a vacuum atmosphere.

In this case, the uncoiler may include: a first uncoiler wound around a first joining steel sheet to be joined to one surface of the base steel sheet; And a second uncoiler wound around a second bonding steel sheet to be bonded to the other surface of the base steel sheet.

In addition, the inlet to the vacuum induction furnace and the openings formed on the upper surface of the vacuum chamber are spaced apart vertically, it is preferable that the opening and closing member for selectively opening and closing the opening of the vacuum chamber is provided.

In addition, the vacuum chamber is preferably provided with a check window for checking each of the cold rolling mill and the hot rolling mill.

In the vacuum chamber, the vacuum induction solution provided therein is preferably configured with a check door for maintenance of the cold rolling mill, the uncoiler, and the hot rolling mill.

On the other hand, it is preferable that the uncoiler and the hot rolling mill are connected to the gear box coupled to the geared motor, respectively, and driven by the geared motor.

According to another aspect of the invention, the dissolving step of dissolving the metal in the vacuum induction furnace; A vacuum molten metal forging step of forging a molten metal discharged from the vacuum induction melting furnace with a cold rolling mill to form a base steel sheet; A transfer step of heating the bonded steel sheet uncoiled from the base steel sheet and the uncoiler so that the temperature of the base steel sheet and the bonded steel sheet becomes a set bonding temperature while guide conveying the conveyor; And a hot rolling step of overlapping the transferred base steel sheet and the bonded steel sheet by hot rolling with a hot rolling, and joining the bonded steel sheet to the base steel sheet as the steps are performed in a vacuum chamber. Provided is a multi-layer metal sheet continuous manufacturing method to be made in.

Here, the conveyor, the frame is disposed between the cold rolling mill and the hot rolling mill; A feed roller installed horizontally along an upper portion of the frame to guide feed the base steel sheet and the bonded steel sheet; And a halogen heating tunnel having halogen lamps disposed on the upper and lower sides of the transfer roller, respectively, installed in the frame and heating the temperature of the base steel sheet and the bonded steel sheet to be raised to a predetermined bonding temperature. Do.

At this time, the conveyor, the side rollers are mounted along the upper both sides of the frame, respectively, to guide the base steel sheet and the bonded steel sheet to be transported from both sides; And a pinch roller spaced apart from the upper side of the feed roller so as to guide and support the base steel sheet and the bonded steel sheet to be transported from above.

The uncoiler may include: a first uncoiler on which a first joining steel sheet to be joined to one surface of the base steel sheet is wound; And a second uncoiler wound around a second bonding steel sheet to be bonded to the other surface of the base steel sheet.

In addition, the inlet to the vacuum induction furnace and the opening formed in the upper surface of the vacuum chamber is spaced apart vertically, it is preferable that the opening and closing member for selectively opening and closing the opening of the vacuum chamber is provided.

The vacuum chamber may include an inspection window for checking each of the cold rolling mill and the hot rolling mill.

In addition, it is preferable that the vacuum chamber is provided with a check door for maintenance of the cold rolling mill, the uncoiler, and the hot rolling mill by the vacuum induction solution provided therein.

On the other hand, it is preferable that the uncoiler and the hot rolling mill are connected to the gear box coupled to the geared motor, respectively, and driven by the geared motor.

According to the method of continuously manufacturing a multilayer metal sheet according to the present invention, the multilayer metal sheet is manufactured in a vacuum atmosphere in a vacuum chamber, thereby preventing oxidation from occurring on the surface of the base steel sheet and the bonded steel sheet during the manufacturing process, and further having an oxidized surface. By not bonding, the quality of the multilayer metal sheet is not degraded.

In addition, by heating the base steel sheet and the bonded steel sheet to a temperature suitable for the joining process by the halogen heating tunnel at the same time, it can be rolled at an appropriate temperature without overheating in the hot rolling mill.

As a result, the multi-layered metal sheet to be produced has a healthy interfacial state in which no intermetallic compound and cracks are generated in the joining interface portion, and furthermore, the bonding strength of the multi-layered metal sheet is also increased due to the healthy interfacial state. Has an effect.

Figure 1 is a schematic diagram showing the manufacture of a multi-layer metal sheet material by a method for continuously manufacturing a multi-layer metal sheet according to the prior art.
FIG. 2 is a cross-sectional view illustrating an interface of a multilayer metal sheet manufactured by the method of continuously manufacturing the multilayer metal sheet of FIG. 1.
3 is a flowchart illustrating a method of continuously manufacturing a multilayer metal sheet according to a preferred embodiment of the present invention.
Figure 4 is a perspective view showing a multi-layer metal sheet manufacturing apparatus utilized in the multi-layer metal sheet continuous manufacturing method of FIG.
5 is a perspective view illustrating a vacuum chamber in the multilayer metal plate manufacturing apparatus of FIG. 4.
6 is a perspective view showing a cold rolling mill in the multi-layer metal sheet manufacturing apparatus of FIG.
7 is a perspective view illustrating a hot rolling mill in the apparatus for manufacturing a multilayer metal sheet of FIG. 4.
8 is a perspective view illustrating a conveyor in the apparatus for manufacturing a multilayer metal sheet of FIG. 4.
9 is a front view illustrating the conveyor of FIG. 8.
FIG. 10 is a schematic diagram illustrating manufacturing a multi-layer metal sheet by the multi-layer metal sheet production apparatus of FIG. 4.
FIG. 11 is a cross-sectional view illustrating an interface of a multilayer metal sheet manufactured by the multilayer metal sheet manufacturing apparatus of FIG. 4.

3 is a flowchart illustrating a method of continuously manufacturing a multilayer metal sheet according to a preferred embodiment of the present invention.

Referring to the drawings, the multi-layer metal sheet continuous manufacturing method of the present invention is sequentially made in a vacuum atmosphere including a dissolution step, a molten metal forging step, a transfer step, and a hot rolling step.

First, the dissolution step is a step of dissolving the metal in the vacuum induction furnace.

That is, the dissolving step is a step of dissolving a metal which is a material for making the base steel plate 11 as a material for manufacturing the multilayer metal sheet material.

Subsequently, the vacuum molten metal forging step is a step of forming the base steel plate 11 by forging the molten metal discharged from the vacuum induction melting furnace with a cold rolling mill.

In this vacuum molten metal forging step, the molten metal melted in the vacuum induction melting furnace 30 is rolled at a low temperature below a certain level so as to form a constant shape such as a sheet material, thereby forming the base steel plate 11.

Next, the transfer step, the bonding temperature is set to the temperature of the base steel plate 11 and the bonding steel sheet 12 while the conveyor guides the bonded steel sheet 12 and the uncoiled joint steel sheet 12 from the uncoiler Heating is possible.

In this transfer step, the substrate steel plate 11 and the bonded steel sheet 12 is guided to the hot rolling mill 60, and is heated so that the temperature of the base steel sheet 11 and the bonded steel sheet 12 becomes a set bonding temperature.

That is, the transfer step heats the base steel plate 11 and the bonding steel sheet 12 so that the temperature of the base steel sheet 11 and the bonding steel sheet 12 to be transferred is raised to the set bonding temperature.

Accordingly, the temperature of the base steel sheet 11 and the bonded steel sheet 12 is heated to a temperature suitable for a process for joining each other to raise the temperature.

That is, the transfer step is heated at the same time during the heating and the base steel plate 11 and the bonding steel sheet 12 to a temperature suitable for the bonding process, as shown in Figure 10, overheating in the hot rolling mill 60 to be described later To be rolled at an appropriate temperature.

As a result, as shown in Fig. 11, the multi-layered metal sheet produced is free of intermetallic compounds (9 in Fig. 1) and cracks (7 in Figs. 1 and 2) in the joint interface 18. Have a healthy interface. In addition, the bonding force of the multi-layer metal sheet is also increased due to the sound interface state.

Finally, in the hot rolling step, the base steel sheet and the bonded steel sheet 12 to be transferred are overlapped and hot rolled together by a hot rolling mill.

That is, in the hot rolling step, in the process of bonding the base steel plate 11 and the bonded steel sheet 12, the base steel sheet 11 is bonded with the base steel sheet 11 at a predetermined or higher temperature in order to form a temperature suitable for the bonding to be smooth. The steel plate 12 is rolled.

In the present invention constituted as described above, the steps of manufacturing the multi-layer metal sheet material is carried out in a vacuum atmosphere, whereby oxidation occurs on the surface of the base steel plate and the bonded steel sheets 12 used in the process of manufacturing the multi-layer metal sheet material. It prevents and further improves the quality of the multi-layer metal sheet by having the oxidized surface and not bonding to each other.

Figure 4 is a perspective view showing a multi-layer metal sheet manufacturing apparatus utilized in the multi-layer metal sheet manufacturing method of Figure 3, Figure 5 is a perspective view showing a vacuum chamber in the multilayer metal sheet manufacturing apparatus of FIG.

Referring to the drawings, the multi-layer metal sheet manufacturing apparatus utilized in the present invention is a vacuum chamber 20, the vacuum induction melting furnace 30, the cold rolling mill 40, the uncoiler, the hot rolling mill disposed in the vacuum chamber 20 60 and the conveyor 70.

The vacuum chamber 20 is configured to maintain a vacuum atmosphere therein, and has a proper space for the components to be provided therein.

The vacuum chamber 20 may be a device such as a vacuum pump may be utilized to create and maintain a vacuum state in the interior space, without being limited to any conventional device having the same function as the vacuum pump can be used. Of course.

Here, the vacuum chamber 20 is preferably provided with a check window 24 for checking each of the cold rolling mill 40 and the hot rolling mill 60 to be described later.

In addition, the vacuum chamber 20 may be provided with a check door 26 for the maintenance of the vacuum induction furnace 30, the cold rolling mill 40, the uncoiler, and the hot rolling mill 60 provided therein.

The inspection window 24 and the inspection door 26 are provided for the manager or worker to inspect the multi-layer metal sheet manufacturing apparatus regularly, it is preferable to be installed in an appropriate position and quantity.

In addition, the vacuum induction melting furnace 30 is disposed in the vacuum chamber 20, and serves to dissolve metal introduced into the vacuum chamber 20.

Such a vacuum induction furnace 30 is a furnace manufactured for the purpose of heating and dissolving a solid material above a melting point in a vacuum or an inert gas, and in the heating method, coke, coal gas, natural gas, heavy oil, coal, and the like. It can be used as a fuel, heat conduction, using arc heat, etc. In addition, in the case of an electric conductor to be melted, induction heating that heats by using a resistive heating by flowing an induction current to itself The method can also be used.

In this case, the inlet 30a of the vacuum induction furnace 30 and the openings 20a formed on the upper surface of the vacuum chamber 20 are spaced apart from each other in the vertical direction, and selectively in the openings 20a of the vacuum chamber 20. It is preferable that the opening and closing member 22 is opened and closed.

Of course, the inlet 30a and the opening 20a spaced apart by the appropriate metal transfer means extending to the inlet 30a of the vacuum induction melting furnace 30 when the opening / closing member 22 is opened and the metal is drawn therein, Can be connected to each other.

In addition, the cold rolling mill 40, as shown in Figure 6, is a device for making a base material steel plate 11 by forging a vacuum melt for the melt discharged from the vacuum induction melting furnace 30.

In addition, the uncoiler is configured such that the wound bonded steel sheet 12 is uncoiled.

The uncoiler may include a first uncoiler 54 and a second uncoiler 56, and the first uncoiler 54 may be joined to one surface of the base steel plate 11. ) Is a member wound, and the second uncoiler 56 is a member on which a second joining steel sheet 12b to be joined to the other surface of the base steel plate 11 is wound.

Here, of course, the first bonded steel sheet 12a and the second bonded steel sheet 12b are wound around the first uncoiler 54 and the second uncoiler 56 in the form of a coil, respectively, and the first uncoiler ( As the first and second uncoilers 56 and 54 rotate, the first joining steel sheet 12a and the second joining steel sheet 12b are released and gradually move in the direction in which the base steel sheet 11 is transferred. Take a closer move).

On the other hand, the hot rolling mill 60, as shown in Fig. 7, is configured to superimpose the hot-rolled steel sheet 11, the joint steel sheet 12 uncoiled from the uncoiler by hot rolling.

In this case, the above-described uncoiler and hot rolling mill 60 are preferably connected to the gearboxes 52 and 62 coupled to the geared motor 80 and driven by the geared motor 80.

Here, as one of the geared motor 80 is utilized in the hot rolling mill 60, the gearbox 52 to which the rotating shaft of the uncoiler is connected is connected to the drive shaft of the geared motor 80 by a connecting belt 82. The uncoiler can be driven in rotation.

In addition, the connecting belt 82 is of course configured to maintain a suitable rotational speed in order to manufacture the multi-layer metal sheet material of the rolling roll and the uncoiler of the hot rolling mill 60.

8 is a perspective view illustrating a conveyor in the multilayer metal sheet manufacturing apparatus of FIG. 4, and FIG. 9 is a front view illustrating the conveyor of FIG. 8.

Referring to the drawings, the conveyor 70 is disposed between the cold rolling mill 40 and the hot rolling mill 60.

Such a conveyor 70 includes a frame 72 disposed between the cold rolling mill 40 and the hot rolling mill 60, a feed roller 74 installed in the frame 72, and a halogen heating tunnel 79. do.

At this time, the frame 72 is configured so that the position and structure of the base steel sheet 11 and the bonded steel sheet 12 to be transported to take an appropriate height and path between the cold rolling mill 40 and the hot rolling mill 60. do.

The feed roller 74 is installed horizontally along the upper portion of the frame 72 to guide feed the base steel plate 11 and the bonded steel sheet 12.

That is, the plurality of feed rollers 74 are mounted along the upper surface of the frame 72 in parallel with each other, wherein the base steel plate 11 and the bonded steel plate 12 to be conveyed to each other to achieve accurate and safe transfer Of course, the distance to the distance and the number is determined.

In addition, the halogen heating tunnel 79 is provided in the frame 72, and has a plurality of halogen lamps disposed on the upper and lower sides of the feed roller 74, respectively.

The halogen heating tunnel 79 may be heated by the halogen lamp so that the temperature of the base steel sheet 11 and the bonded steel sheet 12 to be transferred is raised to a predetermined bonding temperature.

In addition, the conveyor 70 further includes a side roller 76 and a pinch roller 78 installed on the upper portion of the frame 72.

The side rollers are mounted along both upper sides of the frame 72 to guide and support the base steel plate 11 and the bonded steel plate 12 to be transferred from both sides.

In addition, the pinch roller 78 is installed on the frame 72 to be spaced apart from the upper side of the feed roller 74, to support the base material steel plate 11 and the bonded steel plate 12 to be transported from the upper side.

As such, the side rollers 76 and the pinch rollers 78 serve to guide and prevent them from being separated during the transfer of the base steel plate 11 and the bonded steel sheet 12.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

11: base steel sheet 12: bonded steel sheet
12a: first bonded steel sheet 12b: second bonded steel sheet
18: junction interface 20: vacuum chamber
22: opening and closing member 24: inspection window
26: inspection door 30: vacuum induction melting furnace
30a: Inlet 40: Cold rolling mill
52, 62: gearbox 54: first uncoiler
56: second uncoiler 60: hot rolling mill
70: conveyor 72: frame
74: feed roller 76: side roller
78: pinch roller 79: halogen heating tunnel
80: geared motor 82: connecting belt

Claims (14)

A dissolving step of dissolving the metal in a vacuum induction furnace;
A vacuum molten metal forging step of forging a molten metal discharged from the vacuum induction melting furnace with a cold rolling mill to form a base steel sheet; And
And a hot rolling step of overlapping and joining the base steel sheet and the uncoiled joint steel sheet by hot rolling with a hot rolling mill.
The method of claim 1, wherein the bonding of the bonded steel sheet to the base steel sheet in a vacuum atmosphere as the steps are carried out in a vacuum chamber.
The method of claim 1,
The uncoiler,
A first uncoiler wound around a first joining steel sheet to be joined to an upper surface of the base steel sheet; And
A second uncoiler on which a second joining steel sheet to be joined to a bottom surface of the base steel sheet is wound;
Multi-layer metal sheet continuous manufacturing method comprising a.
The method of claim 1,
The inlet to the vacuum induction furnace and the openings formed on the upper surface of the vacuum chamber are spaced apart in the vertical direction,
The opening of the vacuum chamber is a multi-layer metal sheet continuous manufacturing method characterized in that the opening and closing member is selectively installed.
The method of claim 1,
The vacuum chamber is a multi-layer metal sheet continuous manufacturing method characterized in that the inspection window for the check of each of the cold rolling mill and the hot rolling mill.
The method of claim 1,
The vacuum chamber has a vacuum induction solution provided therein, the continuous manufacturing method of the multi-layer metal sheet, characterized in that the check door for maintenance of the cold rolling mill, uncoiler, and hot rolling mill.
The method according to any one of claims 1 to 5,
The uncoiler and hot rolling mill,
And a gearbox coupled to a geared motor, respectively, and driven by the geared motor.
A dissolving step of dissolving the metal in a vacuum induction furnace;
A vacuum molten metal forging step of forging a molten metal discharged from the vacuum induction melting furnace with a cold rolling mill to form a base steel sheet;
A transfer step of heating the bonded steel sheet uncoiled from the base steel sheet and the uncoiler so that the temperature of the base steel sheet and the bonded steel sheet becomes a set bonding temperature while guide conveying the conveyor; And
And a hot rolling step of overlapping the mother steel plate and the bonding steel sheet being transferred to each other by hot rolling by hot rolling.
The method of claim 1, wherein the bonding of the bonded steel sheet to the base steel sheet in a vacuum atmosphere as the steps are carried out in a vacuum chamber.
The method of claim 7, wherein
The conveyor,
A frame disposed between the cold rolling mill and the hot rolling mill;
A feed roller installed horizontally along an upper portion of the frame to guide feed the base steel sheet and the bonded steel sheet; And
A halogen heating tunnel having halogen lamps disposed on upper and lower sides of the feed rollers, the halogen heating tunnel being installed on the frame and heating the temperature of the base steel sheet and the bonded steel sheet to be raised to a predetermined bonding temperature;
Multi-layer metal sheet continuous manufacturing method comprising a.
The method of claim 8,
The conveyor,
Side rollers each mounted along the upper both sides of the frame to guide and support the transferred base steel sheet and the bonded steel sheet on both sides; And
A pinch roller spaced apart from the upper side of the feed roller so as to guide and support the base steel plate and the bonded steel plate to be transported from the upper side;
Multi-layer metal sheet continuous manufacturing method further comprising.
The method of claim 7, wherein
The uncoiler,
A first uncoiler wound around a first joining steel sheet to be joined to an upper surface of the base steel sheet; And
A second uncoiler on which a second joining steel sheet to be joined to a bottom surface of the base steel sheet is wound;
Multi-layer metal sheet continuous manufacturing method comprising a.
The method of claim 7, wherein
The inlet to the vacuum induction melting furnace and the opening formed in the upper surface of the vacuum chamber are spaced apart from each other in the vertical direction,
The opening of the vacuum chamber is a multi-layer metal sheet continuous manufacturing method characterized in that the opening and closing member is selectively installed.
The method of claim 7, wherein
The vacuum chamber is a multi-layer metal sheet continuous manufacturing method characterized in that the inspection window for the check of each of the cold rolling mill and the hot rolling mill.
The method of claim 7, wherein
The vacuum chamber has a vacuum induction solution provided therein, the continuous production method of a multi-layer metal sheet material, characterized in that the cooling door, uncoiler, hot rolling mill, and a check door for maintenance of the conveyor is configured.
The method according to any one of claims 7 to 13,
The uncoiler and hot rolling mill,
And a gearbox coupled to a geared motor, respectively, and driven by the geared motor.

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