JPS59223147A - Continuous production of clad steel plate - Google Patents

Abstract

PURPOSE:To obtain easily a clad steel plate having excellent strength by supplying simultaneously a cladding material which is so supplied as to form the side wall of a casting mold under continuous movement and a molten metal and melt-sticking the cladding material to a solidified billet which is a base material. CONSTITUTION:A cladding material 6 is so supplied as to form one side wall or two opposed side walls of a casting mold 19 which moves continuously in a casting direction. A molten metal 10 which is a base material is directly fed therein. A cladding material 11 is continuously melt-stuck to the metal 10 solidified in the mold 19. 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 sheets have been widely used, in which plates of different metals are bonded to the surface of a strip or plate-shaped metal plate serving as a base material. This is because the shortcomings in the properties of the base material can be compensated for by laminated boards (clad materials), and it is a very rational material with excellent strength, workability, and corrosion resistance. be.

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

First, to explain the conventional methods, the following ones 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, which serve as an alloy layer during crimping, are stacked one on top of the other, and then sandwiched between metal plates, which serve as the outer base material, and rolled.The cladding material is crimped to the base material in an assembled sandwich method.

■ Explosive crimping is a method in which a clad material is layered on top of a metal plate that touches the base material, and explosives are spread on top of the cladding material, and the explosive force of the cladding material is used to compress the cladding material and the base material.

■ The casting method 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 the base metal and then rolled.

In any of the above-mentioned methods, the manufacturing process is complicated and time-consuming. For example, in the prefabricated sand inch method (■), the process a-
Process d of manufacturing the bee and the cladding material separately from this
@6 a f e g and a step h-1-j for assembling the base material and cladding material produced in these steps are required. 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 continuous manufacturing method for clad steel plates that can continuously manufacture two clad steel plates in a rational and short 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 cladding material is used to form one side wall or two opposing side walls of the mold. At the same time, the molten metal that becomes the base material is poured into a mold, and the clad material is welded to the solidified slab to form a continuous clad steel sheet.

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 4 which is inclined downward from the horizontal, is wound rotatably between two lower pulleys 2 by a drive device (not shown), and has blocks 3 at both ends. and,
A cladding material 6, which is parallel to the lower belt 4 and offset from it by a length, is fed between two pulleys 5 at the same speed as the lower belt 4 by a drive device (not shown), and this cladding material. A dummy puff to which the tip of the belt 6 is fixed, a back-up roll 8 which is cut in multiple stages between the lower pulleys 2 and 5 and the pulleys 5 and 5 and supports the lower belt 4 and the clad material 6, and the upper part of the lower belt 4 that protrudes by l. and a tundish 11 into which molten metal 10 is cast. An endless track type mold 12 is constructed from the lower belt 4, the left and right blocks 3, and the clad material 6.

When producing a clad steel plate using such an endless track type continuous casting machine 1, the tip of the clad material 6 wound into a roll is fixed to a dummy puff and drawn in the casting direction at the same speed as the lower belt 4. At this time, the clad material 6 comes into contact with the block 3 of the lower belt 4 to form a mold 12, and this mold 12
Molten metal 10 is cast from a hetendish 11.

Next, gradually pull out the dummy puff, and in parallel,
The outer surface (the side opposite to the contact surface of the molten metal 10) is cooled with cooling water. If the amount of cooling water is adjusted appropriately, the cladding material 6 will be welded to the solidified slab 13 at the contact area with the molten metal 10 in the mold 12, and the slab 13 will be welded to the slab 13 as shown in FIG.
A cross section of the cast slab with the cladding material 6 fixed to the surface of the cladding material 6 is generated, and a continuous cladding steel plate is formed.

And pinch roll 1 installed at the outlet of continuous casting machine 1
Step 4: Pull out the clad steel plate.

The guide rad material 6 may be provided below instead of the lower belt 4, or may be provided both above and below.

4 and 5 show the manufacturing method of a clad steel plate using a continuous casting machine 16 having a casting wheel 15. Clad material 6 on the outer peripheral surface between pulleys 18 and 15 of 15
Send it while touching it. At this time, the groove 17 and the clad material 6
A mold 19 is constructed, and the molten metal 10 is poured into the mold 19 from the tandice 11. The clad material 6 is welded to the solidified slab 13 to form a continuous clad steel plate, as in the case of the continuous track caster 1.

Note that the cladding material 6 may be supplied to the bottom of the groove 17 at the same time.

〔Effect of the invention〕

The present invention has the following configuration and has the following effects.

■ Clad material is supplied to form one side wall or two opposing side walls of a mold that moves continuously in the casting direction, and the molten metal that becomes the base metal is directly cast into this mold. No pre-processing such as surface preparation or machining of the material is required.

Furthermore, this eliminates the need for processes such as assembly and temporary welding, and eliminates the loss of material due to removal of assembly and 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.〇■ Conventionally used continuous casting machines can be used, and the mold A member serving as one side wall or two side walls can be omitted. Therefore, there is no need to spend on equipment, and this also makes it possible to manufacture clad steel sheets 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 that performs the clad steel plate manufacturing method of the present invention, and Fig. 3 is a cross section taken along the line A-A in Fig. 1. 4 is a front view showing another aspect of FIG. 2, and FIG. 5 is a front view showing another aspect of FIG.
B, ii sectional view. 1. Track continuous casting machine, 2. Lower pulley, 3. Block, 4 fists/lower belt, 5. Pulley, 6. Clad material, 7. Dummy bar, 8. Backup roll, 10・e molten metal, 11・
-Tandish, 12 Φ mold, 13... Slab b'
4.-Pinch roll, 15.. Casting wheel, 16.. Continuous casting machine, 17.. Groove, 18.. Pulley, 19.. Mold.

Claims (1)

[Claims] Clad material is supplied to a continuous casting mold that moves continuously in the casting direction so as to form one or two opposing side walls of the mold, and molten metal that will become the base material is poured into the mold. 1. A continuous method for manufacturing a clad steel sheet, characterized in that the clad material is welded to a solidified slab to form a continuous clad steel sheet.