JPH01312006A - Production of metallic sheet - Google Patents

Abstract

PURPOSE:To continuously obtain a metallic sheet which is free from edge cracks with good productivity by forming deposits having edge deposition parts consisting of the metal particles different from the metal particles on a substrate to both sides of the metal particle deposition parts of the substrate and cutting the metal sheet parts formed in the edge parts after rolling. CONSTITUTION:The molten metal Ma of the metallic sheet stock is dropped from a central tundish nozzle 7a and the molten metal Mb of the kind different from the metal Ma from tundish nozzles 7b1, 7b2 on both sides thereof respectively toward the substrate 6. Both the metal particles are then atomized by an atomizer 5 during the course of the dropping. The formed deposits D are continuously drawn out of the rotating substrate 6 and thereafter the substrate is rolled 6. Both the edge parts Db, Db of the deposits D are formed of the stock having the higher workability than the workability of the stock Da at the center in this rolling and, therefore, the edge crack can be suppressed. The edge parts Db, Db of the rolled sheet S are cut away and thereafter, the sheet is coiled by a coiler 15.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing a thin metal plate suitable for use as a material that is difficult to process such as an intermetallic compound.

[Conventional technology]

A so-called spray method is known as a method for directly manufacturing a thin plate from molten metal. This method atomizes the molten metal flowing down from a nozzle with a gas jet, depositing the resulting metal particles onto a rotating drum below, which is then deposited in a continuous strip. A thin metal plate is manufactured by peeling off the sheet and rolling it with a rolling mill.

[Problem to be solved by the invention]

However, when manufacturing thin metal sheets made of difficult-to-process materials such as intermetallic compounds using this method, edge cracks occur in the sheet during in-line hot rolling immediately after spraying, and various problems such as sheet breakage during rolling occur. This causes problems.

Such edge cracks occur because tensile stress is generated at the widthwise ends of the plate during rolling. In general, techniques for preventing edge cracking in difficult-to-process materials include: ■ Sheath rolling method: A method in which the material is sealed with a highly ductile material and then rolled.■ Dissimilar material bonding method: A method in which a material with high workability is welded to the edge of the plate. Rolling method■ Constraint rolling method: There are known methods of rolling while restraining the sheet width using side plates, but among these, methods ■ and ■ are applicable to continuous lines using the spray method. It is extremely difficult to do so. In addition, in the method (2), since the edge is cooled by the side plate (guide), the deformation resistance of the edge is greater than that in the center, and as a result, even with restraint rolling, edge cracking cannot be sufficiently prevented.

The present invention has been made in view of these problems, and it is an object of the present invention to provide a method for manufacturing thin metal sheets without edge cracks continuously and with high productivity using a spray method.

[Means and Embodiments for Solving the Problems] Therefore, the present invention continuously forms a plate-shaped deposit by depositing high-temperature metal particles on a rotating substrate 1, and continuously deposits metal particles from the substrate. When manufacturing a thin metal sheet by rolling the deposit that has been drawn out, edges made of metal particles of a different type from the metal constituting the deposit are placed on both sides of the deposited part of the metal particles, which is the material of the thin metal sheet, on the substrate. After forming a deposit having a deposited portion and rolling the deposit, the metal plate portion formed by the edge deposited portion is cut and removed.

Hereinafter, the details of the present invention will be explained based on the drawings.

Figures 1 to 4 show a state of implementation of the present invention, in which (1) is a deposit forming machine equipped with a molten metal 71 to a miser, and (2) is a rolling machine for the formed deposit (D). (3) is a slitting device for slitting both sides of a rolled thin plate. The deposit forming machine (1
) includes tundishes (4) into which molten metal is placed, atomizers (5) that atomize the molten metal flowing down from these tundishes, and a rotating substrate (6) for depositing atomized metal particles. It is configured.

The tundish (4) consists of a tundish (4a) into which the molten metal of the target thin metal sheet material is placed, and a tundish (4b) into which the molten metal that is to form the parts to be finally cut from both ends of the thin sheet is placed. ing. These tundish nozzles (4a) (4b) are equipped with tundish nozzles (7a) (7b1) (7b, ) at their lower portions, and the tundish nozzles (7a) of the tundishes (4a) are provided at the center in the width direction of the substrate. ), and the tundish nozzle (7b) of the tundish (4b) (7b2) is arranged on both sides thereof.

The atomizer (5) is composed of a pair of gas jet nozzles, and is configured to inject a high-speed gas jet stream (A) from both sides of the molten metal stream (M) flowing down from the tundish nozzle (7). ing.

The substrate (6) is constituted by a rotating belt consisting of a pair of guide wheels (or rollers) and an endless belt. Note that this substrate can also be constructed from a rotating drum or the like.

Further, a pair of slit nozzles (8) are provided below the atomizer (5), and the gas (B) is sprayed onto the metal particle flow (m) formed by the atomizer (5). The falling range of the flow (m) is narrowed down to a predetermined range so that metal particles are deposited with a uniform thickness in the width direction of the substrate.

The slit device (3) is a round blade (91) in this embodiment.
It is composed of a slit roll (9) having a slit roll (9).

Note that the slitting device (3) is not limited to the above-mentioned slitter roll method, but may be any other suitable method such as a 1-rim method, a cutting method using gas or laser, or the like.

According to the above-mentioned apparatus, as shown in FIG. 2, the molten metal (M8) of the target thin metal sheet material flows from the central tundish nozzle (7a) and from the tundish nozzles (7b) on both sides. ,, ) (7b,) The molten metals (Mb), which are different from the molten metals (A.) mentioned in 1., respectively fall toward the substrate (6), and on the way, the molten metals (A.
It is atomized into particles by a mister (5). That is,
A high-speed gas jet stream (A) is injected diagonally downward from a pair of gas die 1~ nozzles located on both sides of the molten metal stream (M.) (Mb), and this is made to collide with the molten metal stream (Ma) (Mh). This atomizes the molten metal into particles.

Each metal particle (m8) (mb) thus formed is rapidly solidified and deposited on the lower substrate (6) to form a deposit (D). This deposit (
In D), as shown in FIG. 3, the central deposited portion (DIl) is made of the desired thin plate material metal, and the edge deposited portions (D,) on both sides are made of a different kind of metal. The metal for this edge deposited portion (Db) is selected from a metal that has higher workability (ductility) than the metal for the central deposited portion.

The deposit (D) is continuously drawn from the rotating substrate (6) and rolled in a rolling mill (2). In this rolling, both edge parts of the deposit (D) are made of a material that is more workable than the material in the center (the deposited part (Da)), so edge cracking is suppressed, and even if cracks occur, the center The transfer to the depositing section (D8) is prevented.

The rolled thin plate (S) is sent to a slitting device (3) as shown in FIG.
The edge plate portion (]0) formed by is cut and removed. After such slitting process, the thin plate (S) has a line (1
5) is wound up.

It goes without saying that the metal material formed on the plate surface side can be selected as appropriate depending on the material of the intended thin metal plate.
For example, the following materials are selected.

Metal thin plate material Edge plate part (1) Alnico mild steel (2) 6.
5%Sj -Fe (3) 12%Afl-Fe Note that the method for forming a deposit in the present invention is not limited to the above embodiments, and for example, as shown in FIGS. Alternatively, the rotating roll (11) may be used as the atomizer (5). In this method, a pair of rotating rolls (11) are arranged at a predetermined interval, and each tundish nozzle (7a) (7b
□) By flowing down the molten metal stream (L) (Mb) from (7b2), the molten metal is atomized into particles (m8) (mb).

Further, as shown in FIGS. 7 and 8, the deposit 1- may be formed by a low-pressure plasma method.

In this method, thermal spray nozzles (12a) (12bx) (
12bW is supplied with metal particles to the plasma jet in the substrate spray nozzle, and each metal particle (ma
) (mb) is sprayed from the nozzle onto the substrate (6).

In addition, in the present invention, a heat treatment furnace (13) and a temperature adjustment device (4) as shown in FIG. It can be performed.

In the heat treatment furnace (13), when the object to be manufactured is a thin plate of an intermetallic compound, heat treatment is performed for the purpose of ensuring the strength of the thin plate. In addition, the temperature adjustment device (14) is used to equalize the cooling rate in the width direction and thickness direction of the thin metal plate (S) wound on the line (15), and to ensure an appropriate plate shape. , heating means (heaters, etc.) that can vary the temperature adjustment range in the direction of the board, above and below the threading line.
and a cooling means (cooling gas injection nozzle).

The method of the present invention described above can be applied to the production of all kinds of thin metal sheets, including materials that are difficult to process, such as intermetallic compounds and silicon-iron alloys.

〔Effect of the invention〕

According to the present invention described above, it is possible to continuously and efficiently manufacture a gold R thin plate without edge cracks even when the material is difficult to process such as an intermetallic compound.

[Brief explanation of the drawing]

Figures 1 to 4 show one implementation situation of the present invention, with Figure 1 being an overall explanatory diagram and Figure 2 being a sub-substrate 1-1 of metal particles.
FIG. 3 is an explanatory diagram showing a cross section of a deposit, and FIG. 4 is an explanatory diagram showing a state of slitting a thin plate by a slitting device. Figures 5 and 6 show other methods for deposit formation;
The figure is a side view, and FIG. 6 is a front view. Figures 7 and 8 show other methods for deposit formation;
The figure is a side view, and FIG. 8 is a front view. FIG. 9 is an explanatory diagram showing a case where a heat treatment furnace and a temperature adjustment device are provided on the downstream side of the line. In the figure, (1) is a deposit forming machine, (2) is a rolling machine, (3) is a slitting device, and (5) is an atomizer-1 (
6) is the substrate, (7a) (7b, ) (
7b, , ) are tandate nozzles, (10) are edge plate parts, (11) are rotating rolls, (12a) (12b
, ) (12b2) is a thermal spray nozzle, (M) (M,) (
mb) is a molten metal, (m) (m,) (mb) is a metal particle, (D) is a deposit, (Da) and (Db) are a deposited portion, and (S) is a thin metal plate. =11- ○ 1□ Figure 5 Figure 7 Figure 12 Djn";i,. →--"-1 Figure 6 Figure 8

Claims (1)

[Claims] A method of manufacturing a metal sheet by continuously forming a plate-shaped deposit by depositing high-temperature metal particles on a rotating substrate, and rolling the deposit continuously drawn from the substrate, On a substrate, a deposit having edge deposits made of metal particles of a different type from the metal constituting the deposit is formed on both sides of a deposit of metal particles, which is a thin metal sheet material, and after rolling the deposit, the edges are A method for manufacturing a thin metal plate, comprising cutting and removing a portion of the metal plate formed by the deposited portion.