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Copper alloy and process for producing the same

A manufacturing method and technology of copper alloy, applied in the field of copper alloy and its manufacturing, can solve the problems of residue, difficulty, limitation of high strength and high electrical conductivity of alloy, etc.

Inactive Publication Date: 2007-03-14
SUMITOMO METAL IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, there are limitations in increasing the strength and electrical conductivity of this alloy, and problems remain at the point of product variations as shown below
[0013] However, as mentioned above, the electrical conductivity [IACS (%)] and the tensile strength [TS (MPa)] are in a trade-off relationship, and it is extremely difficult to improve both simultaneously. Copper alloys with high tensile strength and sufficiently high thermal conductivity TC have no alternative to the described Cu-Be alloys

Method used

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  • Copper alloy and process for producing the same
  • Copper alloy and process for producing the same
  • Copper alloy and process for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] Copper alloys having the chemical compositions shown in Tables 1 to 3 were vacuum-melted in a high-frequency melting furnace, and cast into molds made of zirconia to obtain cast pieces with a thickness of 12 mm. Rare earth elements Add individual elements or mixed rare earth elements.

[0113] Alloy

No.

Chemical composition (mass%, balance Cu and impurities)

The first group of elements

total

Elements of the second group

The third group of elements

total

Elements of the fourth group

total

be

Ti

Zr

Hf

Cr

1

2

3

4

5

15Fe, 1.0Si, 0.2Sn, 1.2Al

10Fe, 2.5Ni, 1.0Si, 0.4Zn

1.01Fe, 0.1Zn

0.99Fe, 0.5Ag

0.01Sn

17.4

13.9

1.11

1.49

0.01

0.05

0.49

1.02

1.51

1.93

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

0.5Y, 0.01Nd, 0.02Ca

-

0.0...

Embodiment 2

[0157] In order to evaluate application to safety tools, samples were produced in the following manner, and abrasion resistance (Vickers hardness) and spark generation resistance were evaluated.

[0158] Alloys having the chemical compositions shown in Table 8 were melted in a high-frequency furnace in the atmosphere, and mold casting was carried out according to the Duvelly method. That is, in the state shown in FIG. 3(a), the metal mold 1 is kept, and while a reducing atmosphere is ensured with charcoal powder, after molten metal at about 1300° C. is injected into the metal mold 1, it is drawn as shown in FIG. 3( b ). ) is reversed, and solidified in the state shown in Figure 3 (c) to make a cast sheet. The metal mold 1 is made of cast iron with a thickness of 50 mm, and a hole for cooling is opened in the inside, and piping can be air-cooled. The cast piece is wedge-shaped to facilitate casting, the lower section is 30×300, the upper section is 50×400mm, and the height is ...

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Abstract

A copper alloy that has a specific chemical composition, the balance being Cu and impurities, in which the relationship between the total number N and the diameter X satisfies the following formula (1). This copper alloy is obtained by cooling a bloom, a slab, a billet or an ingot in at least a temperature range from the temperature of the bloom, the slab, the billet or the ingot just after casting to 450 DEG C, at a cooling rate of 0.5 DEG C / s or more. After the cooling, working in a temperature range of 600 DEG C or lower and further heat treatment of holding for 30 seconds or more in a temperature range of 150 to 750 DEG C are desirably performed. The working and the heat treatment are most desirably performed for a plurality of times. logN 0.4742 + 17.629 exp - 0.1133 X wherein N means the total number of precipitates and inclusions, having a diameter of not smaller than 1 [mu]m which are found in 1 mm 2 of the alloy; and X means the diameter in [mu]m of the precipitates and the inclusions having a diameter of not smaller than 1 [mu]m.

Description

technical field [0001] The present invention relates to a copper alloy which can be produced inexpensively without solution treatment and has excellent mechanical properties and electrical conductivity, and a method for producing the same. Examples of uses of this copper alloy include electrical and electronic components, safety tools, and the like. [0002] Examples of electrical and electronic components include the following. In the field of electronics, connectors for personal computers, semiconductor sockets, optical pickups, coaxial connectors, IC checker pins, and the like are exemplified. In the communication field, examples include mobile phone parts (connectors, battery terminals, antenna parts), submarine repeater housings, connectors for switches, and the like. In the automotive field, various electrical components such as relays, various switches, micromotors, diaphragms, and various terminals can be cited. In the field of aerospace and space, a landing gear fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22F1/00
Inventor 前原泰裕米村光治中岛敬治长道常昭
Owner SUMITOMO METAL IND LTD
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