JPH01312010A - Metal sheet manufacturing equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an apparatus for manufacturing a thin metal sheet suitable for fan-processing materials such as intermetallic compounds.

[Conventional technology]

A so-called spray method is known as a method for directly manufacturing thin plates from bath metal. This method atomizes molten metal flowing down from a nozzle with a gas jet, depositing the resulting metal particles onto a rotating drum below, and removing the deposits from the rotating drum.
A thin metal plate is manufactured by continuously peeling off the IJ tube shape 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. cause problems.

This kind of edge cracking is caused by the generation of tensile stress at the edges of the plate in the width direction during rolling. Especially in the case of sprayed materials, the wall thickness at the edges of the material becomes extremely dry, so it is difficult to reduce the temperature. This increased tensile stress easily causes edge cracking. 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 ■Restricted 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 Nuple method. It is extremely difficult to do so. In addition, in method (2), since the die is cooled by the side plate (guide), the deformation resistance of the base edge is greater than that in the center, and as a result, edge cracking cannot be sufficiently prevented even with restraint rolling.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide an apparatus capable of manufacturing thin metal sheets continuously and with high productivity without causing edge cracks.

[Means to solve the problem]

For this purpose, the apparatus of the present invention includes a deposit forming machine that continuously forms a plate-shaped deposit by depositing high-quality metal particles on a rotating substrate, and a deposit forming machine that continuously forms a plate-shaped deposit by depositing metal particles of high quality 1 on a rotating substrate. a rolling mill disposed downstream of the line of the deposit forming machine to roll the deposit, and between the rolling mill and the substrate,
In order to fully restrain both ends of the deposit, one end is inserted between the rolling rolls of a rolling mill to form a joint restraining part on both sides of the deposit,
A pair of guide plates are installed extending from the other end to the metal particle falling area on the substrate.

[For production]

In view of the fact that the cause of edge cracking is that large tensile stress is generated at the side edges of the material during rolling, and the wall thickness of the side edges of the material is extremely small, the present invention has developed is formed by rolling so that the wall thickness of the side ends is ensured, and rolling is performed in which both side ends are restrained, and this restrained rolling and securing of the wall thickness of both side ends are performed. The device was designed to minimize the generation of tensile stress at the side edges.

According to the apparatus of the present invention, high-temperature metal particles generated by atomization of molten metal or low-pressure plasma spraying are deposited on a rotating substrate, and deposits are continuously formed. This deposit is made by a guide plate located on the top surface of the substrate, so that the thickness of both ends is sufficient (
usually thicker than the center).

FIG. 8(a) shows a cross section of the substrate (5) (p) in the width direction in the conventional spray method, and FIG. 8(b) shows its thickness distribution. 8th
As shown in figure (a), in order to equalize the width of the deposit,
Substrate (5) Particles are deposited in the width direction by overnubbing, but even with this method, the plate thickness becomes thinner at the edge of the plate as shown in Figure 8 ('b). .

On the other hand, in the present invention, as shown in FIG. 9, the oversprayed metal particles (m) are collected at the side end by the guide plate (8), so that the thickness of the L1 side end is ensured. 1st
Figure 0 shows the thickness distribution in the width direction of the deposit thus formed.

The plate-shaped deposit formed as described above is continuously pulled out from the substrate while being guided by guide plates on both sides, and rolled in a rolling mill. In this rolling, the deposit is rolled while being restrained by guide plates on both sides. By ensuring the thickness of the deposit on both sides, the temperature drop at the edge is suppressed, and furthermore, the generation of tensile stress is suppressed by restraint rolling as described above, so that the occurrence of edge cracking is appropriately suppressed.

〔Example〕

1 to 4 show an embodiment of the present invention,
The device consists of a deposit forming machine (1) having a molten metal atomizer, a rolling mill (2+) downstream of the deposit forming machine (1), and a pair of kite plates (8) installed between the deposit forming machine and the rolling mill. ing.

The deposit forming machine (1) atomizes molten metal and deposits the metal particles on a rotating substrate to continuously form a plate-shaped deposit 1-'. , tongue tissue (3), an atomizer (4) consisting of a gas jet nozzle, and a rotating belt type substrate placed below the atomizer (
5) It is composed of etc.

The kundish (3) is provided with a kundish nozzle (6) at its lower part, through which the molten metal flows downward.

The atomizer (4) is composed of a pair of gas jet nozzles, and is configured to inject a high-speed ganuses stream (A) from both sides of the molten metal stream (M) flowing down from the tundish nozzle (6). .

The substraight (5) is composed of a rotating belt consisting of a pair of guide wheels (major rollers) and an endless belt.

Incidentally, this substrate (5) can also be constituted by a rotating drum.

Further, a pair of slit nozzles (7) are provided below the atomizer (4), and the metal particle flow (m) formed by the atomizer (4) is sprayed onto the gas CB)'. 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 rolling mill (2) is arranged on the line downstream side of the deposit forming machine (1), and the rolling roll (9) has grooves (91 ) is formed.

The pair of guide plates (8) are constructed to restrain both ends of the debossor l-(D) between the substrate (5) and the rolling mill (2), and one end of each of the guide plates (8) is installed between the substrate (5) and the rolling mill (2). (
9) Concave groove (91) Penetrates in the e-line direction and extends at the other end at the position of the metal particle falling portion of the substrate (5). This guide plate (8) is held by the housing or other fixed part of the rolling mill (2), and the substrate (5) is configured to rotate while sliding with respect to this guide plate (8). This guide plate (8) restrains both sides of the deposit from the top of the substrate (5) to the rolling mill (2nd), and forms a restraining part (10) between the upper and lower rolling rolls (9) for restraint rolling. .

In addition, in the above embodiments, the deposit forming machine (1)
As shown in Fig. 5, a pair of rotating rolls (l)
) can be used.

A pair of rotating rolls (11) are arranged at a predetermined interval, and the molten metal flow is caused to flow down this interval.

Further, the deposit forming machine can also be a low-pressure plasma spraying type device as shown in FIG. This deposit forming machine (1) has a thermal spray nozzle 09, in which metal particles are supplied to a plasma jet, and the metal particles melted by the plasma jet are transferred from the nozzle onto the substrate (5). Sprayed.

In addition, in the apparatus of the present invention, a seventh
A heat treatment furnace az and an i degree adjustment device (13) as shown in the figure can be provided.

In the heat treatment furnace (Iz), 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. Also, the temperature adjustment device 03 is used to coil the coiler into a coiler round. This is to equalize the cooling rate in the width direction and thickness direction of the thin metal plate (S) that is being processed, and to ensure an appropriate plate shape. It has variable heating means (heater etc.) and cooling means (cooling gas injection nozzle).

Next, the operation of the apparatus of the present invention will be explained based on FIGS. 1 to 4.

The molten metal in Kuntish (3) passes through the Tundish nozzle (6), becomes a molten metal flow (M), falls towards the substrate (5), and is turned into particles by the atomizer (4) on the way. Atomized. That is, by injecting a high-speed gas jet stream (A) obliquely downward from a pair of gas jet nozzles located on both sides of the molten metal stream (M) and colliding with the molten metal stream (M), the molten metal is is atomized into particles. In the apparatus shown in FIG. 5, the molten metal is atomized into particles by flowing down a pair of rotating rolls (with a molten metal flow CM between them) whose rotational speed is controlled. In addition, in the apparatus shown in FIG. 6, molten metal particles (m) are sprayed together with a plasma jet from a thermal spray nozzle.

The high-temperature metal particles (m) thus formed fall while rapidly solidifying and are deposited on the lower substrate (5) to form a plate-shaped deposit (D).

Deposit) (D) As shown in FIG. 3, the oversprayed metal particles (m) are collected at the side edges by the guide plate (8), so that a sufficient thickness at the side edges is ensured.

The deposit (D) is continuously pulled out from the rotating substrate (5) and guided to the rolling mill (2) while being kited at both ends by guide plates (8).

In the rolling mill (2), the material is rolled while being restrained by kite plates at both end portions. Deposit) (D), as mentioned above, has sufficient wall thickness at both ends to suppress its temperature drop, and is constrained by the guide plate (8) to prevent the generation of tensile stress. Therefore, the occurrence of ear cracking is appropriately prevented.

The metal sheet (S) thus rolled is then wound around a coiler α.

The apparatus of the present invention described above can be used to manufacture 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, a thin metal plate without edge cracks can be manufactured continuously and with high productivity even when the material is difficult to process such as an intermetallic compound.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention,
Figure 1 is an overall explanatory diagram, Figure 2 is a view taken along the line I-■ in Figure 1, Figure 3 is an explanatory diagram showing a cross section of the deposit edge on the substrate, and Figure 4 is a rolling illustration. It is an explanatory view showing the rolling situation by the machine. FIGS. 5 and 6 are explanatory diagrams showing other embodiments of the deposit forming machine, respectively. FIG. 7 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. FIG. 8(a) is an explanatory diagram showing the cross-sectional shape of the deposit obtained by the conventional apparatus, and FIG. 8<b) shows the thickness distribution thereof. FIG. 9 is an explanatory diagram showing the cross-sectional shape of the deposit obtained by the deposit forming machine of the apparatus of the present invention, and FIG. 10 shows the plate thickness distribution of the deposit obtained in FIG. In the figure, (1) is a deposit forming machine, (2) is a rolling machine, (4) is an atomizer, 1 (5) is a substrate,
(8) is a guide plate, and (15) is a thermal spray nozzle. Patent applicant: Nippon Kokan Co., Ltd. Inventor: Mihara
Tomi 1) Ministry, patent attorney representing me
Yoshihara, Sanmon, Tomabechi, Toshigu L8 ■ - 5 la 8 Figure 9 (b) ↑ Figure 10 b

Claims (1)

[Claims] a deposit forming machine that continuously forms a plate-shaped deposit by depositing high-temperature metal particles on a rotating substrate; and a deposit forming machine that rolls the deposit that is continuously drawn from the substrate. A rolling mill disposed on the downstream side of the line, and between the rolling mill and the substrate, one end is inserted between the rolling rolls of the rolling mill to form a deposit both-side end restraining part in order to restrain both ends of the deposit. A thin metal sheet manufacturing apparatus comprising a pair of guide plates whose other end extends to a metal particle falling area on a substrate.