JPS5890352A - Continuous casting mold inner wall plate and its manufacturing method - Google Patents

Abstract

PURPOSE:To agitate the molten steel particularly in a mold electromagnetically effectively by constituting a copper material or the laminate parts of the copper material and a ferrous nonmagnetic material and the part of only the ferrous nonmagnetic material into one body in constituting the inside wall plate of a mold for continuous casting. CONSTITUTION:For example, austenitic stainless steel 1-(b) which has an excellent hot abrasion property and is nonmagnetic, and a copper material 1-(a) having an excellent heat conduction property are firmly joined by diffusion welding or the like to form laminated plates (figure A and figure D). Thereafter, the laminated plates are plastically worked and are mechanically cut by leaving the places shown by respective dotted lines (figure C and figure E). The respective laminated plates of figure C are manufactured from the laminated plates of figure B and the laminated plates of figure E from the laminated plates of figure D. These laminated plates are used as the inside wall plate of a mold for continuous casting. Here, 1 in figure denotes an inside wall, 2 an outside wall, 3, 4 denote an inlet and outlet for cooling water, respectively, and a, b respective fayed surfaces. M denotes a meniscus part, L the surface of molten metal and S the solidified part of the molten metal, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a continuous casting mold interior/wall plate and its O, which is particularly effective when an electromagnetic stirring device is added to the casting plate and has heat crack resistance. The present invention relates to the above-mentioned inner wall plate having a hot abrasion resistant chamber and a manufacturing method therefor.

The O#s type for conventional O continuous casting is made of a back frame made of a copper-based O flat plate material with a high mechanical strength of -9, and is tightened with bolts etc. as one side of the I8! It has a box-like structure with a pair of faces.

In continuous O2 casting operations using such casting W, there are many ways to add new functions to the cast iron, such as improving the quality of the slab O, electromagnetic stirring, and slow cooling. In order to significantly affect the service life, in the method of mounting an electromagnetic stirring device on the outside of the mold wall, the mold wall should be made as thin as possible, and the material should be made of a copper-based material with good electrical conductivity. It is said that electromagnetic force should be used effectively for molten copper O/stirring, with limited use. From the viewpoint of zero cooling capacity, it is desirable to provide a strong cooling zone, a slow cooling zone, and a storage space. In addition, the life of cast IO is near the meniscus (II
During continuous casting, remove the part where the upper surface of the hot water O comes in contact with fII#
The supply speed is uneven, the feed position fluctuates up and down, and cracks occur due to thermal stress.
Since it depends on the solidified shell of the slab O seen at the lower end of the mold O and the hot abrasion due to zero friction, heat crack resistance and heat resistant abrasion O material are required.

However, to date, no mold has been provided that simultaneously satisfies the above-mentioned characteristics.

Therefore, the present inventors have developed a multi-layer mold wall that has the above-mentioned mold wall 0 function, 1 strong cooling range and slow cooling range, and has heat crack resistance, wear resistance, and wear resistance properties when installing an electromagnetic stirring device in a mold. The results of intensive research into the mold wall and its manufacturing method.

9. The present invention has been completed.

In other words, the present invention provides a continuous casting mold that is integrally formed with a continuous casting mold O, an inner wall plate chamber, a part where a copper material or a copper-based material and a ferrous non-magnetic material are superimposed, and a ferrous non-magnetic material O and a 0 part. After joining the mold inner wall plate, copper-based material, and ferrous non-magnetic material on a flat surface, and forming this by plastic working, the excess O part is removed and the copper-based material or the copper-based material and the ferrous non-magnetic material are bonded. A method for manufacturing an inner wall plate of a continuous casting mold, which is integrally formed with a layered portion of magnetic material and a layered portion of iron-based non-magnetic material.

is also O.

The present invention will be described in more detail below with reference to FIGS. 1 to 5.

Figures 1 and 2 show embodiments of the separate O inner wall panels of the present invention.
[Fig. 6 is a sectional view of Fig. 5, Fig. 1 is a cross-sectional view of Fig. 1, Fig. 4 is a sectional view of Fig. 1, O-1',
Fig. 5 shows cross-sectional views of Fig. 1 00-0', @ Fig. 2 □ D-D', and 1-1'.

In the figures, the same reference numerals represent the same parts.

In the figure, 1-a, 1-mouth is the inner wall, 2 is the outer wall)%
Black and 4 indicate the inlet and outlet of cooling water, respectively.

Out of 110, 1-i is a copper-based material with excellent heat conduction.
0 is a non-magnetic O material with hot abrasion resistance.
The nine joint surfaces shown by o and d are firmly joined by K11. O bonding can be achieved by metallurgical solid-phase bonding such as diffusion welding, or mechanical bonding such as explosion bonding, thermal spraying, plating, etc., and a combination of metallurgical bonding and metallurgical bonding. It may be any other means.

The outer wall 2 has excellent high-temperature strength and is made of a non-magnetic O-iron material, and is provided with cooling water channels 5 inside. Further, the inner wall 1 and the outer wall 2 are joined by diffusion welding or the like to form a multilayer OSMM. Such multi-layer plate warehouses are combined and integrated mechanically or by welding to form a casting W.

In the figure, %M is the meniscus portion and L is the molten metal surface.

8 indicates the solidified portions of the molten metal O.

In Fig. 1, the molten steel injected from the direction of arrow O is rapidly absorbed in the strong cooling region 1-40 of the inner wall, which has excellent heat conduction characteristics at the upper end of the mold, and continues to form a solidified shell, but inside the mold O. At this point, the IJi1.1-port in the O is slowly cooled because the upper wall is filled with an iron-based material having a low heat-absorbing ability.

Furthermore, when applying electromagnetic force from the outside of the mold wall to stir the II steel, the electromagnetic force acts effectively because the outer wall as well as the inner wall are made of non-magnetic material.

In addition, the surface of the lower end is made of iron-based material and exhibits excellent properties against hot abrasion of slabs and O.

Figure 2 O also has a lower strong cooling function than Figure 1 040, but it is superior to Figure 1 O in terms of heat cracking, which is one factor in mold life.

Whether O4O in Figure 1 is adopted or O in Figure 2 is also O [Whether to adopt depends on the properties of the metal to be cast, operating conditions, etc.

The decision will be made after comprehensive consideration.

Next, the present invention O continuous casting mold inner wall plate 0III! Construction method [,
This will be explained with reference to FIGS. 6 to 10.

In Fig. 6, 1-A is made of a non-magnetic O material, such as austenitic stainless steel, which has excellent hot abrasion characteristics, and 1-I is made of a copper-based O material that has excellent heat conduction characteristics.

1-I! and 1-a by diffusion welding, explosion bonding, thermal spraying, and plating.

A return plate is formed by firmly bonding using low-phase O technology.

Such a multilayer board is subjected to mechanical processing as shown in FIG. 7 or 9, and two parts are mechanically removed, leaving only the portions indicated by dotted lines.

Figure 7 O is used for Figure 8 O multi-layer board.

9 O and 10 O multilayer plates are obtained. These O multilayer plates provide the inner walls of Koji 1 and fj 82.

Copper-based O materials with excellent thermal conductivity include chromium copper and silver-containing copper in addition to pure copper; 8U8 S 04.808314 etc. are used.

Since the inner wall plate of the dud 110 continuous casting mold has the structure as described above, it can produce the following effects.

(i) Slab O quality From an O perspective, since the mold has a strong cooling area and a slow cooling area, the solidified shell O formation is ideal and the quality is improved. Electromagnetic stirring [When performing electromagnetic stirring, there is little loss of electromagnetic force, which effectively acts on the molten steel in the solidified shell, improving quality.

(2) In terms of the life of the casting lid, it has an excellent effect on hot wear at the bottom end of the mold, and in the case shown in Figure 2, it also has an excellent effect on heat cracking at the meniscus. show.

(3) Inner wall [Because the different materials that make up the wall are continuously joined, there are no discontinuous points in the heat flow rate, and ideal heat removal can be achieved.

[Brief explanation of drawings]

1 to 5 are explanatory diagrams of an inner wall plate of a mold for continuous casting according to the American invention, and FIGS. 1 and 2 show an embodiment of the separate inner wall plate. Figure 5 is #! Figure 1 is a sectional view of Omu', Figure 4 is a cross-sectional view of
FIG. 0B-B' is a sectional view taken along line 2, and FIG. 95 is a sectional view taken along line 1-00-0', FIG. Figures 6 to 10 are diagrams showing the manufacturing process OWi of the mold inner wall plate O for dud@110 continuous casting. Sub-Agents 1) Meifuku Agent Ryo Hagiwara - Continued from page 1 0 Author Yu Maruyama Mitsubishi Heavy Industries, Ltd. Hiroshima Shipyard, 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City 0 Author Minoru Okamoto Kitakyushu Nippon Steel Corporation Yawata Works, 1-1-1 Edamitsu, Hatto-ku, To the City ■Applicant Nippon Steel Corporation 2-6-3 Otemachi, Chiyoda-ku, Tokyo Procedural amendment (method) % formula % ] 1. Indication of the case Patent Application No. 187850 (1983) 2'QBA') Title Inner wall plate for continuous casting mold and its manufacturing method 3. Person making the amendment Relationship with the case Patent applicant Address Tokyo 2-5-1 Marunouchi, Chiyoda-ku, 1' decrease (620) Mitsubishi Heavy Industries, Ltd. (name) (1 other person) 4-voice agent 6, number of inventions increased by amendment Target (1) Inventor section of Book 81 (2) Drawings (3) Contents of amendment to power of attorney a (1) Inventor section of application, where it should be (and 5 others) should be (and 4 others) I made a mistake, so I will submit an application with the correct information. (2) Submit an engraving of the - side (no changes to the content). (3) Supplement the power of attorney. 9 List of attached documents (1) 1 application for correction

Claims (2)

[Claims] (1) The inner wall plate of the continuous casting mold is integrally composed of a copper-based material or a portion where a copper-based material and a ferrous non-magnetic material are overlapped, and a ferrous non-magnetic material 0 portion.1- Features a mold inner wall plate for continuous casting. (2) Copper-based material and iron-based non-magnetic material are joined in a flat plane, and after forming this by plastic working, the excess O part HO
A method for manufacturing an inner wall plate O of a mold for continuous casting, which is formed integrally with a part where a copper-based material or a copper-based material and a ferrous non-magnetic material are overlapped and a ferrous non-magnetic material O+O part.