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Copper alloy with excellent flexibility and its production method

A manufacturing method, a technology of titanium-copper alloy, applied in the field of copper alloy and its manufacturing, can solve the problems of residual precipitates, decreased material bendability, large grains, etc.

Inactive Publication Date: 2009-11-11
JX NIPPON MINING & METALS CORP
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Problems solved by technology

[0007] However, it is the fine precipitates that contribute to the high strength of the titanium-copper alloy, and the coarse precipitates do not contribute to the improvement of the strength.
In addition, the material becomes the starting point of cracks during bending, which may cause the disadvantage of reducing the bendability of the material.
[0008] When the solution treatment temperature before aging treatment is set higher, although no coarse precipitates can be seen, the crystal grains become larger, which is more and more insufficient for the higher strength of the quality required in recent years.
[0009] On the other hand, when the solution treatment temperature is set low, although the crystal grains are refined, the coarse precipitates remain in the matrix, which becomes the starting point of cracks during the bending process of the material, which may cause the bending of the material. Disadvantages of reduced sex

Method used

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  • Copper alloy with excellent flexibility and its production method
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Embodiment

[0040]Electrolytic copper or oxygen-free copper was used as raw material, and ingots (thickness 20 mm) of various compositions shown in Table 1 were cast in a high-frequency vacuum melting furnace. Next, this ingot was hot-rolled at the temperature described in Table 1 to a thickness of 8 mm, and the scale on the surface was planarized, followed by cold rolling to obtain a plate with a thickness of 0.43 mm. In the subsequent solution treatment, each composition was annealed at the temperature shown in Table 1 for 30 seconds, and then cooled to room temperature at the cooling rate shown in Table 1.

[0041] Then, after cold rolling (thickness: 0.3 mm) at a working degree of 30%, aging treatment was performed on the condition that the highest strength could be obtained for each test material. Here, for Example No. 9 in the table, in order to observe the influence of the working degree on the bendability of the material, the final working degree was determined at 60%.

[0042] E...

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Abstract

An object of the present invention is to provide a titanium-copper alloy having excellent strength and good bendability. The titanium-copper alloy is characterized in that it contains 1.0 to 4.5% by mass of Ti, the rest is composed of Cu and unavoidable impurities, and the diameter of the intermetallic compound of Cu and Ti precipitated in the alloy is 3 μm or less, and in the vertical The average number of intermetallic compounds of Cu and Ti with a size of 0.2 to 3 μm precipitated in the alloy in the cross section of the rolling direction is 700 or less per 1000 μm 2 , and the grain size is 10 μm or less.

Description

[0001] Technical field to which the invention belongs [0002] The present invention relates to a copper alloy having excellent strength and good bendability and a method for producing the same. Background technique [0003] Copper alloys used for terminals, contacts, etc. are required to have high strength and high conductivity as basic characteristics of products. In addition, with the miniaturization of electronic equipment products in recent years, the miniaturization and thinning of electronic components are also remarkable, and metal members such as terminals and contacts are also subject to severe and complicated bending. Therefore, it is desirable to have good bending workability. s material. [0004] As high-strength copper alloys, the amount of age-hardening type copper alloys used has increased in recent years. By aging the supersaturated solid solution after solution treatment, the fine precipitates are evenly dispersed and distributed, and the strength of the al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22F1/00C22F1/08
CPCC22C9/00C22F1/08
Inventor 泉千寻波多野隆绍
Owner JX NIPPON MINING & METALS CORP
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