JPS59223146A - Continuous production of clad steel plate - Google Patents

Abstract

PURPOSE:To obtain easily a clad steel plate having excellent strength by supplying simultaneously a molten metal and a cladding material into a casting mold under continuous movement and melt-sticking the cladding material to a solidified billet which is a base material. CONSTITUTION:A cladding material 11 is supplied into a mold for continuous casting which moves continuously in a casting direction while said material is brought into contact with one side wall (belt 3) or two opposited side walls (belt 13 and casting wheel 12) of said mold. A molten metal 8 which is a base material is at the same time charged into said mold. The material 11 is continuously melt-stuck to the metal 8 solidified in the casting mold. The clad steel plate having excellent strength is thus easily obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a continuous manufacturing method for continuously manufacturing clad steel sheets.

[Prior art and problems]

In recent years, clad steel plates, in which plates of different metals are bonded to the surface of a strip or plate-shaped metal plate serving as a base material, have been widely used. This is because the shortcomings in the characteristics of the base material alone can be compensated for by the laminated board (clad material), and it is also a very rational material with excellent strength, workability, and corrosion resistance. .

However, conventionally, there have been problems with the manufacturing method.

First, the conventional methods will be explained. The following methods are generally known.

■ On the top and bottom surfaces of two pieces of cladding with a release agent in between,
This is a method in which thin metal foils that serve as an alloy layer during crimping are layered, and then sandwiched between metal plates that serve as the outer base material and rolled.The assembled sandwich method involves crimping the clad material to the base material. .

■ Explosive crimping method, which is a method in which clad material is layered on top of the metal plate that serves as the base material, and gunpowder is spread on the top surface, and the explosive force of the clad material is used to compress the siflad material and the base material.

■ Cast-in combination method, which is a method in which two pieces of cladding material with a release material sandwiched between them are placed in the center of the casting, and the outside of the cladding material is cast with base metal and then rolled.0 Any of the above. Even in this method, the manufacturing process is complicated and time-consuming. For example, in the prefabricated sandwich sanderch method (■), the step a* is to produce a base material as shown in
b-c and a separate process d for producing clad material
Steps e @ * f e g and steps h-i-j for assembling the base material and cladding material produced in these steps are required, respectively. Furthermore, similar to method (1) above, methods (2) and (2) also make it impossible to continuously produce a rad steel plate, resulting in poor manufacturing efficiency and increased costs.

[Purpose of the invention]

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to provide a method for continuous production of clad steel plates, which allows clad steel plates to be manufactured continuously and rationally and in a short period of time.

[Structure and operation of the invention]

According to this invention, a clad steel plate is manufactured using a continuous casting machine having a mold that moves continuously in the casting direction, and the clad material is brought into contact with one side wall or two opposing side walls of the mold. At the same time, the molten metal that serves as the base material is cast, and the clad material is welded to the solidified slab to form a continuous clad steel plate.

Embodiment FIGS. 2 and 3 show a case in which a clad steel plate is manufactured using an endless track type continuous casting machine 1.

The endless track type continuous casting machine 1 includes a lower belt 3 which is inclined downward from the horizontal, is rotatably wound by a driving device (not shown) between two lower pulleys 2, and has blocks 5 at both ends. and,
It is parallel to the lower belt 3 and is offset from it by a length l, and is wound between the two upper pulleys 4 by a drive device (not shown) so that it can rotate at the same speed as the lower belt 3. Molten metal 8 is placed on top of the upper belt 6, which protrudes by l, and on the lower belt 3, which protrudes by l.
It consists of a tandish 9 in which the material is cast. Then, from the upper and lower belts 3.6 and the left and right blocks 5 to the endless track type mold 1
0 is configured.

The cladding material 11, which is being rolled into a roll, is brought into contact with the upper belt 6 from above the endless track type continuous casting machine 1, while the upper and lower belts 6.3 and #1 move the casting mold 1 at the same speed.
0 continuously. At this time, Tandish 9
The molten metal 8 is poured into the mold 10 from the above. The clad material 10 that is continuously fed into the mold 10 comes into contact with the molten metal 8 that is poured through the tundish 9, and is welded to the solidified slab 8a at the contact area, forming the slab 8 as shown in FIG.
A cross section of the cast slab with the cladding material 11 fixed to the upper surface thereof is generated to form a continuous clad steel plate.

In FIG. 4, the cladding material 11 is fed from below into the mold 10 while being in contact with the lower belt 3.

It is also possible to combine the methods shown in FIGS. 2 and 4, that is, to feed the cladding material 11 into the mold 10 from above and below.
- Figures 5 and 6 show the production of clad steel sheets using a continuous casting machine 14 having a casting wheel 12 and a casting belt 13.

The continuous casting machine 14 includes a casting ring 12 having a groove 15 on the outer periphery, and two pulleys 16 in contact with the outer peripheral surface of the casting ring 12.
A casting belt 13 rotatably wound around pulleys 16, 16, and 17 by a drive device (not shown), and a tundish 9 for casting molten metal 8 into a groove 15 of a casting wheel 12. It has become. The groove 15 and the casting belt 13 constitute a mold 18.

In this case, the cladding material 11 is fed into the mold 18 by contacting the casting belt 13 from one side, or by contacting the bottom of the groove 15 of the casting wheel 12 from the other side.
Or do both. And track type continuous casting machine 1
As in the case of , it is welded to the slab 8a to form a continuous clad steel plate.

〔Effect of the invention〕

In addition to the above configuration, the present invention has the following effects.

■ Molten base metal and cladding material are simultaneously fed into a mold that moves continuously in the casting direction, and the cladding material is welded to the solidified slab. Pre-processing such as machining is not required. Furthermore, this eliminates the need for processes such as assembly and temporary welding, and there is no need for assembly or removal of temporary welding parts.

(2) By omitting each step (2), clad steel sheets can be manufactured continuously), and can be manufactured extremely easily and at low cost. In addition, since clad material is completely welded to the base material, it has much superior strength compared to conventional crimping methods.0 ■ Since the conventional continuous casting machine can be used, equipment costs are This also means that clad steel sheets can be manufactured at low cost.

[Brief explanation of drawings]

Fig. 1 is a process diagram showing a conventional manufacturing process, Fig. 2 is a front view showing an endless track type continuous casting machine for carrying out the clad steel plate manufacturing method of the present invention, and Fig. 3 is a cross section taken along line A-A in Fig. 2. 4 is a front view showing another embodiment of FIG. 2, FIG. 5 is a front view showing a continuous casting machine for carrying out the clad steel sheet manufacturing method of the present invention, and FIG.
The figure is a sectional view taken along the line B--B in FIG. 5. 1. Track continuous caster, 2. Lower pulley, 3. Lower belt, 4. Upper pulley, 5II. Block, 6. Upper belt, 8. Molten metal, 8a. Slab, 9. Tandish, 10. Mold, 11. Cladding material, 12. Casting wheel, 13. Casting belt, 14.
Continuous casting machine, 15 fists ・Groove, 16, 17 fights ・Pulley, 1
8.Mold. Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 1.1 (13/18

Claims (1)

[Claims] The continuous casting mold, which moves continuously in the casting direction, is
The clad material is brought into contact with a side wall or two opposing side walls and supplied with force, and the molten metal is poured into the base material, and the clad material is welded to the slab that solidifies in the mold to become a continuous clad steel plate. A continuous manufacturing method for clad steel sheets characterized by: