JPS6187831A - Additive for manufacturing copper and copper alloy - Google Patents

Abstract

PURPOSE:To incorporate additive with high yield and good workability, by adding powdery additive being covered and sealed with Cu or Cu alloy sheet, into molten Cu or Cu alloy. CONSTITUTION:Zr, Mg, B, P, Ca, Si, Ce, etc. are added as deoxidizer or component adjuster into molten Cu or Cu alloy. In this case, a sheet 4 of Cu or Cu alloy having 0.4-0.6mm thickness is bent to U shape, a powder 2 of said additive milled to 12-200 mesh is packed into a ditch 4a from a hopper 6, upper parts of the sheet 4 are pressed in arrow directions 7a, 7b to decrease the diameter, and an opened part 5 of the U-shaped body is sealed. By adding the body into molten Cu or Cu alloy, oxidation of additive such as Zr in air or after floating up to molten metal surface is prevented, and additives are dispersed and incorporated into molten metal uniformly at high yield without special stirring.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to an additive for the production of copper and copper alloys, which is used as a deoxidizer d3 and a minor component regulator, for example, in the production of copper or copper alloys. It is related to.

C. Conventional technology] Conventionally, when producing copper or copper alloy $I, Z was added as an additive.
When r, MQ, BSP, Ca, Si, Ce, etc. are used, these components alone or in alloys are made into lumps and added to the melting chamber of the melting furnace.

[Problem to be solved by the invention] However, metals such as ZR have a lower specific gravity than copper, so
Since it floated to the surface of the layer, it was necessary to stir it to dissolve it uniformly, resulting in poor workability. Moreover, the additive immediately after being added or the additive that has floated to the surface immediately reacts with the atmosphere and oxidizes the surface, resulting in a poor yield.

The present invention was made in order to eliminate the above-mentioned conventional drawbacks, and an object of the present invention is to provide an additive for producing copper and copper alloys that has good workability and a good material yield.

[Means for Solving the Problems] In order to achieve the above object, the present invention has been achieved by forming a copper or copper alloy coating band-like plate with a U-shaped cross section, providing a groove, and forming a groove in the groove. It is characterized by being filled and encapsulated with granules of copper or copper alloy additives.

[Function] When the additive according to the present invention is added to the molten metal, it sinks into the molten metal and does not float to the surface of the molten metal, but the surface of the coating formed from the coating band plate first dissolves, and the additive is absorbed into the molten metal. Things disperse, dissolve, react, and act as additives such as deoxidizing. Furthermore, since the outer periphery of the additive is covered with a coating, the additive does not react with the atmosphere even if it reaches a high temperature before sinking.

Examples] An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 shows a rod-shaped additive according to the same example, and shows additive 1.
has a grain size of 12 to 200 mesh and is an aggregate 3 made of ZR granules 2 as an additive for producing copper or copper alloy, and a covering 4 made of copper or copper alloy that covers the outer periphery of this aggregate 3. The diameter of this additive 1 is 6
~i0amφ, the thickness of the covering 4 is 064~Q, 5
It is formed in mm.

In manufacturing the above-mentioned additive, first, as shown in FIG. The granular material 2 crushed by a cutting device (not shown) is filled into the groove 4a through the opening 5 using a hopper device @6. Next, the upper part of the coating 4 is compressed and reduced in diameter in the directions 7a and 7b of the arrows using a roller die (not shown), and while the granular material 2 is crushed and slid, the opening 5 is closed and sealed. Additive 1 shown in FIG. 1 is produced.

The particle size of the granular material 2 shown in FIG. 1 is preferably adjusted to 12 to 200 mesh for the following reason.

In other words, in order to add the required amount into the molten metal in a short time, it is recommended to increase the weight ratio of the entire particulate material 2 to the additive 1, that is, the filling rate, and shorten the line length of the additive 1. good. However, as shown in the relationship between particle size (mesh) and filling rate (%) in FIG. 3, in the case of fine particles smaller than 200 mesh, the filling rate decreases rapidly and the efficiency of addition becomes low.

In addition, for the same fine granular material 2, the hopper device 6 (Fig. 2)
When filling the coating 4 with the particles, the particles fall off due to its low fluidity, resulting in uneven filling, and the particles 2 are uniformly contained in the length direction. It's hard to get things.

Moreover, if the particles are too fine, the reaction with the molten metal will be too fast, making it difficult to react uniformly with the molten metal. Therefore, the particle size of the granular material 1 is preferably larger than 200 mesh.

On the other hand, the reason why it is preferable to make the granules 2 smaller than 12 meshes is as follows.

That is, when coarse particles larger than 12 meshes are filled into the coating 4 and compressed and reduced in diameter, the angular parts of the granules 2 get caught in the joints of the openings 5 of the coating 4. Otherwise, the additive 1 itself may be disconnected. In addition, since the granules 2 are crushed while sliding within the covering 4 and are difficult to integrate, the thickness of the covering 4 may become uneven, and large voids remain between the granules 2, resulting in a filling rate. varies. Therefore, it is preferable that the mesh is smaller than 12 meshes.

Next, the operation of adding the above-mentioned Additive 1 to the 78-liter medium will be explained.

FIG. 4 shows a continuous casting method, and 10 is a tundish containing molten metal 11. A nozzle 13 controlled by a control rod 12 is provided at the bottom of the tundish 10, and the molten metal 1J11 is poured into the mold through the nozzle opening 14. 15. On the other hand, the additive 1 is wound around the supply stand 21 of the feeding device 20, fed by the pinch roll 22, and added into the molten metal 11 via the feed pipe 23.

Now, for example, the Cu-Zr granules 2 are
Molten metal 1 at a temperature of 1150 to 1250°C was adjusted to a mesh, the diameter of additive 1 was 6I1mψ, the thickness of coating 4 was 0.4InlT11, and the filling rate was 53°7%.
1, the feeding speed of the additive 1 is increased by the feeding device 20 from 2 to
Feed at 4 IllZ minutes and set the casting speed to 100-150 mI.
A 250III 111φ twingot was cast for IlZ. At this time, the additive 1 is fed to near the bottom of the tundish 10, and after melting the coating 4, the molten metal 11
The mixture was stirred by convection, and the granules 2 were dissolved and reacted, and the yield of the additive was 70%.

Therefore, unlike the conventional example, the additive 1 does not float to the surface of the molten metal and is oxidized by the atmosphere, so the yield was improved from the conventional yield of 50%.

Next, the relationship between the particle size of the granules 2 and the addition method will be explained.

When adding the additive 1 to the molten metal 11, the additive 1
In order to efficiently dissolve or react in the molten metal 11, the particle size is preferably selected within the range of 12 to 200 mesh.

In addition to the method shown in FIG. 4, the methods shown in FIG. 5 and FIG. 6 are available as addition operations.

In FIG. 5, reference numeral 30 is a ladle containing molten metal 11, and additive 1 is added to this ladle 30 using a feeding device 20.

In addition, in FIG. 6, when the molten metal stored in the holding furnace 40 is supplied to the pool 42 through the gutter 41, it is added to the field flowing through the gutter 41.

In the method of adding to the gutter 41 shown in FIG. 6, since the flow rate of the molten metal 11 is fast, it is necessary to increase the dissolution and reaction rate, so the particle size of the additive 1 is preferably fine.
In the method of adding to w430 shown in the figure, since the heat capacity of the molten metal 11 is large, the particle size may be coarse.
In the continuous casting method shown in the figure, a particle size intermediate between the above two methods may be used.

For example, the particle size of the granular material 2 in the above three methods is
Particle size (mesh) and proportion of granular materials by particle size (%) in Figure 7
As shown in Figure 6, as shown by the dashed line A,
In the method according to No. 1, the number of meshes is 32 to 200, and as shown by the broken line C, in the method according to V1430 in FIG.
~120 mesh, and as shown by the solid line B, in the continuous casting method of Fig. 4, it is best to adjust the particle size to 16 to 170 mesh, which is an intermediate particle size between them. Adjustments result in uniform and rapid dissolution and reaction.

Furthermore, in the past, Additive 1 was generally added directly to the melting furnace (not shown), which caused contamination in the furnace due to the additive components. Although it was necessary to wash the particles, in the above example, the particulate matter 2
The particle size of is adjusted and it melts quickly in the molten metal 11, so it can be added by the method shown in Figures 4 to 6 instead of being added to the melting furnace, so there is no need to clean the melting furnace. .

In addition, since the additive is added by being coated with the covering body 4,
Component adjustment is also easy.

In addition, in the above-mentioned example, Zr was explained as an additive, but it is not limited to this, and Ma, B, and P may also be used.

Of course, Ca1Si, (:, e, etc.) may be used.

[Effects of the Invention] As explained above, according to the present invention, stirring is not required to uniformly dissolve and react the additive in the molten metal, resulting in good workability. Furthermore, since the additives are less likely to float to the surface of the molten metal and be oxidized, the material yield is also good.

Furthermore, since additives can be added in the process after the melting furnace, there is no need to clean the melting furnace.

In addition, since the additives are added after being coated on the coating strip, component adjustment is also easy.

[Brief explanation of the drawing]

Fig. 1 is a cutaway perspective view of an additive according to one embodiment of the present invention, Fig. 2 is an explanatory diagram illustrating the production of the additive according to the same embodiment, and Fig. 3 is the relationship between particle size and filling rate. 4 to 6 are explanatory diagrams showing the method of adding the additive to the molten metal according to the same example, and FIG. 7 is a graph showing the relationship between the particle size of the granular material and the ratio by particle size.

Claims (1)

[Scope of Claims] 1. A coating band plate made of copper or copper alloy is formed into a U-shaped cross section, a groove is provided, and the groove is filled with and encapsulated with granular material of copper or copper alloy additive. Characteristic additives for the production of copper and copper alloys. 2. The additive for producing copper and copper alloys according to claim 1, wherein the particle size of the granules is adjusted to 12 to 200 mesh.