JPH059626A - Ferromagnetic copper alloy and manufacturing method thereof - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a material having excellent strength and processability and magnetic properties. [Structure] In the Cu-Mn-Al ternary phase diagram shown in the figure, (Mn, Al) components are (5 wt%, 10 wt%), (5 wt%
%, 15wt%), (15wt%, 4wt%), (30wt%, 15wt
%), (30 wt%, 3 wt%), or containing 2 to 10 wt% of Ni, and having a unidirectionally solidified eutectic structure consisting of the balance Cu and unavoidable impurities.
And this ingot was repeatedly subjected to heat treatment and cold working in the temperature range of 230 to 700 ° C while maintaining the unidirectional eutectic structure,
A method for producing the above alloy, which comprises performing ferromagnetization treatment after molding into a predetermined shape. [Effect] It is possible to provide a magnetic recording material having a position control function for industrial machines, robots, etc., which are desired to have high performance and miniaturization. It is possible to achieve smaller size and higher performance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention has excellent workability, high strength, and has ferromagnetism by itself, so that it can be electrically connected to an electric switching device such as a switch or a relay, and a control mechanism. A device integrated with a mechanism, a ferromagnetic copper alloy used as a magnetic recording material used for controlling industrial machines, robots, etc. suitable for precision microfabrication and assembly, and a manufacturing method thereof Is.

[0002]

2. Description of the Related Art Conventionally, in machining and assembling, it has been aimed at improving accuracy and reducing cost, but in recent years, there has been a demand for miniaturization technology and high functionality. With the demand, the accuracy and the tendency toward low cost are remarkably advanced. In such a situation, as a means for achieving these requirements, the sophistication of the position accuracy function of industrial machines and robots is considered.

For that purpose, it is required to improve the position accuracy, but the cylinder with a position control function conventionally used in this field is stroke controlled by a combination of a scale on the outer circumference of the cylinder and a detection sensor. However, the structure is complicated, and it has been difficult to cope with miniaturization and cost reduction.
On the other hand, a mechanical notch type is used to install a magnetic recording scale on the piston rod in the cylinder to simplify the structure.However, this method reduces the strength of the piston rod and reduces the magnetic scale. The lack of magnetic properties was a problem.

In addition, since the relay device, which is a type of electric / electronic control device, and the energizing portion of the electric / electronic device have been separately incorporated into the electric / electronic device for use, the size and performance have been improved in recent years. Although it has not been able to sufficiently meet the demands, it was desired to integrate the functions of these devices, but various problems such as current capacity and heat generation are piled up, and it is difficult to realize them. The current situation is that it has not been done.

The present invention is a small, high-performance position which is indispensable to bring sufficient quality to the evolution of processing machines and various robots, etc. which are required to have high performance in position accuracy and are required to be miniaturized. In addition to providing a control function, the electric / electronic control device and the electric / electronic device current-carrying part are integrated to achieve miniaturization and high performance of the electronic device.

[0006]

As a result of various studies in view of the above, the present invention provides a magnetic field for providing a compact and highly accurate position control function to an industrial machine, a robot or the like suitable for performing precision microfabrication and assembly. We have developed a ferromagnetic copper alloy and its manufacturing method, which are suitable for recording materials and miniaturization and high performance of electric and electronic equipment.

That is, one of the copper alloys of the present invention is C shown in FIG.
In the u-Mn-Al ternary phase diagram, the (Mn, Al) components are (5 wt%, 10 wt%), (5 wt%, 15 wt%), (15 wt%
%, 4wt%), (30wt%, 15wt%), (30wt%, 3wt
%) And is composed of the balance Cu and unavoidable impurities, and has a unidirectionally solidified eutectic structure.

Another one of the copper alloys of the present invention is (Mn, A) in the Cu-Mn-Al ternary phase diagram shown in FIG.
l) component is (5 wt%, 10 wt%), (5 wt%, 15 wt%),
(15wt%, 4wt%), (30wt%, 15wt%), (30wt%,
3 wt%) and the composition is surrounded by Ni2-10
It is characterized in that it has a eutectic structure that is solidified in one direction, containing wt% and the balance Cu and unavoidable impurities.

The manufacturing method of the present invention is the Cu-
In the Mn-Al ternary phase diagram, (Mn, Al) components are (5 wt%, 10 wt%), (5 wt%, 15 wt%), (15 wt%,
4% by weight, (30% by weight, 15% by weight), (30% by weight, 3% by weight), or Ni2-10% by weight
In a unidirectionally solidified eutectic structure containing Cu and the balance Cu and unavoidable impurities, and heat treatment and cold working in the temperature range of 230 to 700 ° C while maintaining the unidirectional eutectic structure. It is characterized by performing the ferromagnetization adjustment process after molding repeatedly into a predetermined shape, and as the ferromagnetization adjustment process, β phase treatment in the temperature range of 750 to 950 ° C, and subsequent Apply a quenching process.

[0010]

First, the reasons for limiting the constituent elements of the alloy of the present invention will be described below. In the Cu-Mn-Al ternary phase diagram shown in FIG.
(Mn, Al) component is (5 wt%, 10 wt%), (5 wt%,
15wt%), (15wt%, 4wt%), (30wt%, 15wt%),
A lamellar eutectic structure is formed from the α phase and β phase by co-adding it with the composition enclosed in the range of (30 wt%, 3 wt%), and further controlling this structure to a unidirectional structure. By this, excellent strength can be obtained while exhibiting excellent cold workability. However, if the content exceeds this range, the γ phase is generated, and the alloy becomes brittle, and if the content is less than this range, the eutectic structure which is the feature of the present invention is not formed. Is limited as described above.

Further, 2 to 10 wt% of Ni element in the above alloy
Is added to increase the phase stability of the unidirectional eutectic structure at high temperature during heat treatment, etc., and to improve the cold workability, and to increase the strength remarkably by the inclusion of the Ni element itself. However, if it is less than 2% by weight, its effect is not exerted, and if it exceeds 10% by weight, the eutectic structure is liable to be broken on the contrary, so that it is limited.

Next, regarding the manufacturing method according to the present invention,
After melting the alloy with the above composition, casting is performed by the unidirectional solidification casting method so that the solidification structure is unidirectional in the eutectic state, after that the purpose is to reduce deformation resistance and homogenize the structure in the eutectic structure. As a result, heat treatment in the temperature range of 230 to 700 ° C and cold working are repeatedly performed to mold into a predetermined shape. However, if the temperature is lower than this range, the deformation resistance is not reduced. On the contrary, if the temperature exceeds this range, the eutectic structure is decomposed and the cold workability is impaired. Next, in order to control ferromagnetism after molding into a predetermined shape, heat treatment at 750 to 950 ° C and quenching treatment after that are completed, but below this temperature range the control is not sufficient, If it exceeds this range, the material itself may melt.

[0013]

EXAMPLES The present invention will be described below with reference to its examples. As shown in Table 2, using a so-called hot mold continuous casting method (OCC method) in which the alloys having the compositions shown in Table 1 are melted and the alloys A to J are continuously cast in a state in which the mold is heated to the melting point of the casting alloy or higher. 8mm diameter rod and cross section with thickness 3
After casting a unidirectionally solidified eutectic structure ingot of mm × width 30 mm, heat treatment and cold working under the conditions shown in Table 2, and for alloy K after die casting Inventive examples No. 1 to No. 7 and comparative example N were obtained by hot working at 850 ° C.
8 to No. 11, and these were used as test materials for the characteristic evaluation shown in Table 3.

As a characteristic evaluation, first, a tensile test was conducted based on JIS-Z2241 to measure strength and elongation. Regarding the cold workability, the maximum cold work rate without causing cracking, that is, the limit cold work rate was recorded by cold working the test material. Furthermore,
The plate material was subjected to a bending test in accordance with JIS-Z2248 V block method. A bending angle of 90 degrees was adopted, and when the ratio of the inner radius of bending to the plate thickness was 2.0, the condition of the outer surface of the bending was observed. "○" indicates smooth surface, "△" indicates wrinkle. "," It was judged as "x". The magnetic property of the bar material subjected to the ferromagnetic adjustment treatment was measured using a magnetic sensor, and the output difference from the property of pure copper was measured.

[0015]

[Table 1]

[0016]

[Table 2]

[0017]

[Table 3]

As is clear from Table 1, Table 2 and Table 3, the invention samples No. 1 to No. 7 all have high strength and cold workability, and also have good magnetic properties and bendability. It turns out that However, if it deviates from the scope of the present invention, its characteristics are significantly impaired. Further, Comparative Example No. 11 has an alloy composition equivalent to that of Inventive Example No. 5, but since it has a non-eutectic structure, it has poor tensile strength and cold workability.

[0019]

Industrial Applicability As described above, according to the present invention, it is possible to easily obtain a material having excellent strength and workability and magnetic properties, and to achieve high performance and miniaturization in an industry. We can provide magnetic recording materials with position control functions for machines, robots, etc. Furthermore, by integrating electric and electronic control equipment and electric and electronic equipment energization parts, we can achieve miniaturization and high performance of electronic equipment. It provides a possible material and has a remarkable industrial effect.

[Brief description of drawings]

1 is a Cu-Mn-Al ternary phase diagram.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masato Asai             2-6-1, Marunouchi, Chiyoda-ku, Tokyo             Kawa Electric Industry Co., Ltd. (72) Inventor Mamoru Takeda             2-6-1, Marunouchi, Chiyoda-ku, Tokyo             Kawa Electric Industry Co., Ltd. (72) Inventor Norimasa Sato             2-6-1, Marunouchi, Chiyoda-ku, Tokyo             Kawa Electric Industry Co., Ltd.

Claims (4)

[Claims] 1. In the Cu-Mn-Al ternary phase diagram shown in FIG. 1, the (Mn, Al) component is (5 wt%, 10 wt%),
(5wt%, 15wt%), (15wt%, 4wt%), (30wt%,
15% by weight), (30% by weight, 3% by weight), a ferromagnetic copper alloy characterized by having a unidirectionally solidified eutectic structure composed of the balance Cu and unavoidable impurities. 2. In the Cu-Mn-Al ternary phase diagram shown in FIG. 1, the (Mn, Al) component is (5 wt%, 10 wt%),
(5wt%, 15wt%), (15wt%, 4wt%), (30wt%,
15% by weight), (30% by weight, 3% by weight), Ni2 to 10% by weight, the balance Cu and unavoidable impurities, and a unidirectionally solidified eutectic structure. A ferromagnetic copper alloy. 3. In the Cu-Mn-Al ternary phase diagram shown in FIG. 1, the (Mn, Al) component is (5 wt%, 10 wt%),
(5wt%, 15wt%), (15wt%, 4wt%), (30wt%,
15 wt%), (30 wt%, 3 wt%), or a composition containing Ni2-10 wt%, the balance Cu and unavoidable impurities, and a unidirectionally solidified eutectic structure. In addition, the heat treatment and the cold working are repeatedly performed in the temperature range of 230 to 700 ℃ while maintaining the unidirectional eutectic structure, and the ferromagnetization adjustment process is performed after forming into a predetermined shape. Manufacturing method of ferromagnetic copper alloy. 4. The production of a ferromagnetic copper alloy according to claim 3, wherein the β-phase treatment in the temperature range of 750 to 950 ° C. and the subsequent quenching treatment are performed as a ferromagnetic adjustment after molding into a predetermined shape. Method.