JPS59156544A - Production of clad steel plate in continuous casting installation - Google Patents

Abstract

PURPOSE:To make inexpensively mass production of a long-sized steel plate by pressing two uncoiled steel materials, welding the side edges thereof to each other, passing the steel materials through the inside of a mold, and drawing and press welding a different metal then cutting the side edges and separating both steel materials from each other by spring-back. CONSTITUTION:Both steel plates 7 uncoiled from uncoilers 5 are pressed to each other, and the positional deviation of the plates 7 is corrected by a device 9 for correcting, welding and finishing. The side edges of the two plates 7 are at the same time subjected to high frequency welding at every suitable interval and the side edges are finished smoothly by cutting. The plates 7 are then inserted into a block mold 3 and the melt of the molten metal charged therein is drawn. After the drawn and solidified different metal is press welded with rolls 12, the welded side edges of the plates 7 are cut with a trimming device 14, and the plates 7 are separated from each other by utilizing the spring-back thereof, by which two sheets of clad steel plates 15 are obtd. at one time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing clad steel sheets in continuous casting equipment.

Clad steel sheets are attracting attention because they combine the advantages of multiple metals. Conventional methods for manufacturing this clad copper plate include explosion bonding, gas welding, and diffusion rolling welding. The explosive bonding method is dangerous because it uses the explosive power of explosives to bond dissimilar metals to the base material. In the gas welding method, it is essential to maintain a uniform welding temperature, but it is difficult to do so, and it is difficult to obtain stable quality.In the diffusion rolling welding method, it is difficult to maintain a uniform welding temperature. It is very difficult to completely prevent the formation of vocal intermetallic compounds on the contact surface.In addition, the above three methods lack mass productivity1. , it becomes expensive.

Therefore, the present invention provides a method for manufacturing clad steel sheets in continuous casting equipment that solves these problems. After welding the side edges together, the molten metal made of different metals poured into the mold is pulled out from the mold by the two steel materials, and the dissimilar metals that have been drawn and solidified are passed through the mold. The method involves crimping two long clad steel plates together, then cutting off the side edges of both steel plates, and then separating them from each other using their springbacks. According to this method, two long clad steel plates are It can be mass-produced continuously, resulting in significant cost reductions compared to conventional methods. In addition, after dissimilar metals are drawn out using steel materials, the dissimilar metals are crimped onto each steel material.
The two can be perfectly joined. In addition, there is no danger like explosive bonding, no quality deterioration due to temperature imbalance like gas welding, and the formation of harmful intermetallic compounds on the joint surface like diffusion rolling welding. It is possible. Furthermore, since the side edges of both steel plates are welded together, there is no risk of quality deterioration due to sliding of the steel plates against each other during the manufacturing process of the clad steel plate.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 4. (1) is a tundish with a steel plate passageway (2) in the center, and (3) is a block mold placed directly under the tundish (1), with a square copper frame (
8A) and water-cooled boxes (8B) arranged on the outer surfaces of both long sides of the rectangular frame (8A).

(4) is a guide groove formed on the inner surface of both short sides of the rectangular frame (8A); (5) is a pair of coil "feeding devices" disposed above the tanditsh (1); Each coil feeding device (5) is arranged directly above (1).
A pair of top rollers that bring the steel plates (7) fed out from each other into contact with each other and guide them into the steel plate passageway (2);
9) is a straightening welding finishing device disposed directly below the top roller (6), which straightens both steel plates (7) that have descended through the top roller (6) so that they do not shift relative to each other, and also straightens both steel plates (7) so that they do not shift from each other. The side edges (7A) of the steel plates (7) are high-frequency welded (b) at appropriate intervals, and the side edges (7A) of both steel plates (7) are welded at appropriate intervals.
7A) for a smooth cutting finish. 0
0 Iim plate guide roller is the upper clad steel plate guide roller, Ca is the pressure roller that presses the dissimilar metal a3 drawn from the mold (3) onto each steel plate (7), Q4
is a trimming device that cuts the welded side edge (7A) of the steel plate (7) and furrows both clad steel plates α0 that are bonded together. Q is a lower clad steel plate guide roller, aη is a pinch roller, (to) is a side guide roller, and the central small diameter part (1st row) touches the side edges (7A) of both copper plates (7), and the center Large diameter part (18B) on both sides of small diameter part (1Sho)
are holding the side edges of both plates (7). A9 is a hydraulic cylinder whose main body is fixed to a fixed body and whose piston rod is connected to a bearing that supports the shaft of the side guide roller (g).

The manufacturing procedure of the clad steel plate will be explained based on the above configuration. First, mold the dummy head of the dummy bar (3
). Next, both steel plates (7) paid out from each coil payout device (5) are passed through the steel plate passageway (2) via the top roller (6), and then inserted into the mold (3), and the lower end is inserted into the mold (3). Bring it into contact with the dummy head.

At the same time, both steel plates (7
), the side edges (7A) of both steel plates (7) are welded together, and the side edges (7A) are finished by cutting. Next, the nozzle Qυ of Tanditshu (1)
ua is released and a molten metal made of, for example, stainless steel and dissimilar metal scrap α3 is injected into the mold.Next, when the lower part of the molten metal solidifies and is cast into the engaging part of the dummy head, the dummy head is cast. pull downward.

As a result, the steel plate (7) is pulled downward and the foreign whole body is pulled out from the mold (3). The I-clad steel plate (to) consisting of the different metal JiilQ3 and the square plate (7) is pulled out while being supported by the upper clad steel plate guide roller OJ and the side roller (to), and the dissimilar metal α1 is The steel plate (7) is crimped to completely join the steel plate (7) and the dissimilar metal (to). Next, the welded (b) side edge (7A) of the steel plate (7) is cut by the trimming device θ◆, and the adhesion between both steel plates (7) is released. Next, the clad steel plates a5 whose springback force has been recovered are separated from each other and conveyed in opposite directions by the lower clad steel plate guide rollers α and pinch rollers O'.

In the above embodiment, a block mold (3) was used, but instead of this, as shown in Figs. 5 and 6, a twin mold consisting of a pair of mold roller bodies) and a pair of partition weirs (1! ) may be used for rollers.

In this case, the thin dissimilar metal can be pulled out by rotating both mold f roller bodies in the direction of arrow (4).

As described above, according to the clad steel plate forming device in the continuous casting equipment of the present invention, two long clad steel plates can be mass-produced continuously at a time, resulting in a significant cost reduction compared to the conventional method. be able to. Furthermore, since dissimilar metals are drawn out using steel materials and then crimped onto each steel material, the two can be perfectly joined. In addition, there is no danger like explosive bonding, no quality deterioration due to temperature unevenness like gas welding, and no harmful intermetallic compounds are formed on the joint surface like diffusion rolling welding. can be prevented. Furthermore, since the side edges of both steel plates are welded together, there is no risk of quality deterioration due to slipping between the two steel plates during the manufacturing process of the clad steel plate.

[Brief explanation of drawings]

1 to 4 show one embodiment of the present invention, FIG. 1 is a schematic front view, FIG. , FIG. 4 is a view taken along the arrow N-ff in FIG. 2. 6 and 6 show other embodiments of the present invention, where 511- is a vertical sectional view of the main part, and FIG.
It is an arrow view. -(3)...Block mold, (5)...Coil feeding device, (7)...Steel plate, (7A)...Side edge, (
B)...Crimping roller, (to)...Dissimilar metal, t14
...trimming device, (g)...clad steel plate, (g)...twin mold roller, (2)...high frequency welding agent Yoshihiro Morimoto Figure 3 Figure 4

Claims (1)

[Claims] 1. After bringing the two steel materials fed out from the coil feeding device into contact with each other and welding their side edges together, the two steel materials are passed through a mold, and the molten metal made of dissimilar metals injected into the mold is mixed with the two steel materials. The method involves pulling the dissimilar metals out of the mold, pressing the solidified dissimilar metals onto the surfaces of each steel material, cutting out the side edges of both steel materials, and then separating the two steel materials from each other using their springback. A method for manufacturing clad steel sheets using continuous casting equipment.