JP2844951B2 - Composite material rolling method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for rolling a composite material, and more particularly to a method for rolling a composite metal material.

[0002]

2. Description of the Related Art Conventionally, a pair of rolls whose axes are parallel to each other are used for rolling a metal material or a composite material. In this rolling method, these materials are deformed only in the rolling (longitudinal) direction. I do. For this reason, for example, in a composite metal material composed of two or more layers of metal materials, the materials differ depending on the layers constituted, and the deformation resistance differs depending on the material,
Irregularities occur at the interface of the layers after rolling, causing the thickness of the layers to be locally different, and causing variations in the material properties of the entire material. Therefore, in order to obtain uniform material properties, the flatness of the interface of the layer after rolling is required. For this reason, in the conventional rolling, in order to obtain the flatness of the interface between the layers, a method in which the degree of work during annealing is kept small and a large degree of work is not added has been used.

[0003]

However, in order to obtain the flatness of the interface between the layers by using the conventional rolling method as described above, it is necessary to frequently perform rolling and annealing, which results in an increase in productivity. Was an obstacle in terms of Also, as with homogeneous materials, the strength of the material after rolling is proportional to the degree of rolling after annealing, so it is necessary to improve the strength of the material while securing the flatness of the interface of the composite material. Had limitations.

[0004] It is an object of the present invention to provide a rolling method capable of performing rolling so that the interface of the composite material has excellent flatness, and having higher productivity in the rolling process of the composite material. .

[0005]

The above object can be achieved as follows.

In a method for rolling a composite material comprising at least two layers, a method for rolling a second roll having a circumferential surface of a first roll and an axis perpendicular to the axis of the first roll is provided. The composite material is fed between the sides and rolled.

[0007]

According to the method for rolling a composite material of the present invention, the first row
Rolling is continuously performed between the circumferential surface of the roll and the side surface of the second roll having an axis perpendicular to the axis of the first roll. In this case, the composite material is fed into a roll to be rolled, and the composite material has just reached a position on a vertical line passing through the axis of the first roll and to the side of the second roll. At this position, since the speed direction of the pair of rolls is the same at this position, a force acts on the composite material only in the rolling (longitudinal) direction. However, in this case, the composite material is not in contact with the pair of rollers only at that position, but is also in substantial contact with the pair of rollers before and after that. In these contact portions, the speed direction of the first roll is different from the speed direction of the second roll, and the second roll speed direction is different.
In the rolling speed, a minute speed occurs in a direction perpendicular to the rolling (longitudinal) direction. A shearing force is applied in the width direction of the composite material by the divided speed, and the composite material is deformed in the width direction simultaneously with the deformation in the rolling (longitudinal) direction. The flatness of the interface can be ensured.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the method for rolling a composite material according to the present invention will be described below. FIG. 1 is an explanatory diagram of one embodiment,
1 indicates a horizontal roll, 2 indicates a vertical roll, and 3 indicates a composite material being rolled. That is, the horizontal roll 1 and the vertical roll 2 are arranged so that their axes are orthogonal to each other, and the horizontal roll 1 and the vertical roll 2 are driven in the direction of the arrow to obtain the horizontal roll 1. Is rolled between the circumferential surface of the vertical roll 2 and the side surface of the vertical roll 2. The composite material 3 is continuously rolled between the pair of rolls. At this time, the shearing force in the width direction is applied to the composite material, and the deformation in the width direction occurs at the same time as the deformation in the rolling (longitudinal) direction. Secured.

FIG. 2 is an explanatory view of another embodiment of the present invention, and the reference numerals are the same as those described above. In this case, rolling is performed between the side surface of the horizontal roll 1 and the circumferential surface of the vertical roll 2. FIG. 3 is an explanatory view of another embodiment of the present invention, and 4 indicates a backup roll.
Others are the same symbols as above. In this case, the backup roll 4 acts on the side surface on the back side of the vertical roll 2. 2 and 3, the deformed state of the rolled material is basically the same as that of FIG. 1 and the same result is obtained. However, in the case of FIG. 3, since the backup roll 4 acts, the composite material is deformed.下 下 へ と よ り よ り.

Next, the results of rolling a composite metal material using the rolling method of the present invention will be described.

Example 1: The cross-sectional structure is Cu-40% Zn / Cu
/ Cu-40% Zn, a 1 mm thick composite metal material having a three-layer structure with a thickness ratio of each layer of 1: 8: 1 was preliminarily annealed using a rolling mill shown in FIG. Was rolled to a thickness of 0.4 mm. On the other hand, the same composite metal material was used as a comparative material, and was rolled to a thickness of 0.4 mm by a conventional rolling method without applying intermediate annealing. As a result of microscopic observation of a longitudinal section of these rolled composite metal materials, when a conventional rolling method is used, the thickness of the Cu-40% Zn layer is in the range of 0.122 mm to 0.214 mm, and the thickness varies. , And good results were not obtained in the flatness of the interface of the layers, whereas when the rolling method of the present invention was used, C
The thickness of the u-40% Zn layer is 0.158 mm to 0.164 mm
And the shape of the interface between Cu-40% Zn and Cu had little irregularities.

Example 2: An annealed composite metal material having a three-layer structure of Al / Cu / Al in cross section and a thickness of each layer of 1: 8: 1 and a thickness of 1 mm is the same as in Example 1. Then, the rolling method of the present invention and the conventional rolling method, respectively rolled, as a result of microscopic observation of the longitudinal section of these rolled composite metal material, when using the rolling method of the present invention, the thickness of the Al layer Is 1/1 times smaller than when the conventional rolling method is used.
0 or less, and a good flatness interface was obtained.

In the above embodiment, Cu-40% Zn and C
Although the description has been given of the case of u and each combination of Al and Cu, the present invention is not limited to these and can be applied to other metal materials and metallurgical materials. In particular, during cold rolling of a composite material, as the difference in deformation resistance between the constituent layers increases, the concavo-convex shape of the interface increases in the conventional method, and the effect of the rolling method of the present invention becomes remarkable. Further, the number of composite layers is not limited to three, and the present invention is also effective in rolling a composite material having two or four or more layers.

[0014]

According to the present invention, in order to maintain the flatness of the interface of each layer of the composite material as in the prior art, it is not necessary to repeat the annealing and the rolling by reducing the degree of work during annealing. An excellent flatness of each layer at the interface in the (longitudinal) direction is obtained, and the productivity of the rolling process of the composite material is improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a rolling method showing one embodiment of the present invention.

FIG. 2 is an explanatory view of a rolling method showing another embodiment of the present invention.

FIG. 3 is an explanatory view of a rolling method showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Horizontal roll 2 Vertical roll 3 Composite material 4 Backup roll

Claims (1)

(57) [Claims] 1. A method for rolling a composite material comprising at least two layers, wherein a second roll having a circumferential surface of a first roll and an axis perpendicular to the axis of the first roll. A method for rolling a composite material, comprising: feeding the composite material to a side surface of the composite material and performing a rolling process.