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Copper alloy and producing method therefor

a technology of copper alloy and producing method, which is applied in the field of copper alloy, can solve the problems of deterioration of strength and bendability, inability to obtain excellent strength in titanium-copper, and easy precipitation of ticusub>3/sub>, and achieve excellent bendability and strength improvement

Inactive Publication Date: 2008-05-29
JX NIPPON MINING & METALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a copper alloy with excellent bendability and strength. The alloy contains specific amounts of titanium and a third element group consisting of Fe, Co, Ni, Cr, V, Zr, B, and P. The alloy has a unique structure that allows for the formation of second-phase particles, which help to improve strength and bendability. By controlling the content of the third element group, the alloy can achieve both excellent bendability and strength improvement simultaneously. The second-phase particles are thermally stable and do not change in size during cold rolling and aging processes. The alloy can be used in various applications such as a coating material for titanium-coated steel and a high-performance material for a variety of industries.

Problems solved by technology

In the case in which the content of Ti is less than 2.0%, since it is not possible to sufficiently obtain strength due to formation of the modulated structure of the original titanium-copper, it is not possible to obtain excellent strength in the titanium-copper.
In addition, in the case in which the content of Ti is more than 4.0 mass %, TiCu3 is easily precipitated, deteriorating strength and bendability.

Method used

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  • Copper alloy and producing method therefor
  • Copper alloy and producing method therefor
  • Copper alloy and producing method therefor

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

Ingot Producing Process

[0026]As the third element group, 0.01 to 0.50 mass % of one or more than one kind of element from among Fe, Co, Ni, Cr, V, Zr, B and P was added to an adequate amount of Cu, and thereafter, maintaining them sufficiently, and then 2.0 to 4.0 mass % of Ti was added. In order to effectively liberate the third element group as the second-phase particle, it was necessary to maintain sufficiently the third element group after addition in order to eliminate insoluble residue of the third element group at the ingot producing process. In addition, the Ti is more easily dissolved than the third element group, and therefore the Ti may be added after dissolution of the third element group.

Process after Ingot Producing

[0027]It is desirable to perform homogenizing annealing for not less than one hour at not less than 950° C. after this ingot producing process. By this, segregation is reduced, and in the solution treatment described later, it causes precipitation of the sec...

embodiment 2

Ingot Producing Process

[0030]As the third element group, 0.01 to 0.50 mass % of one or more than one kind of element from among Fe, Co, Ni, Cr, V, Zr, B and P is added to a prescribed amount of Cu, and thereafter, maintaining them sufficiently, and then 2.0 to 4.0 mass % of Ti is added. In order to effectively liberate the third element group as the second-phase particle, it is necessary to maintain sufficiently the third element group after addition in order to eliminate insoluble residues of the third element group in the ingot producing process. In addition, the Ti is easily dissolved in the Cu, and therefore the Ti may be added after addition of the third element group.

[0031]It is desirable to perform homogenizing annealing for not less than ten hours at not less than 950° C. after this ingot producing process. By doing so, segregation is reduced, and in the solution treatment described later, it causes precipitation of the second-phase particle to disperse finely and homogeneou...

embodiments

[0034]Next, there will be described embodiments of the present invention.

[0035]In the case of the copper alloy of the present invention, a vacuum melting furnace is used for ingot producing in consideration of the fact that active Ti is added as the second component. In addition, in order to prevent the occurrence of unexpected adverse effects caused by interfused impurities other than those stipulated elements in the present invention, high-grade raw material (electrolytic copper and pure titanium) is used.

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Abstract

Superior bendability in a copper alloy and further strength improvement ensures characteristics which are sufficiently superior in view of essential qualities of strength of titanium-copper. 2.0 to 4.0 mass % of Ti, 0.01 to 0.50 mass % of one or more than one kind of element from among Fe, Co, Ni, Cr, V, Zr, B, and P as the third element group are contained, and not less than 50% of the total content of these elements is made to exist as second-phase particles.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a copper alloy for use in connector materials, etc. More particularly the present invention provides a producing method for a copper alloy in which excellent bendability and strength are obtained simultaneously.[0003]2. Description of Related Art[0004]A copper alloy that contains titanium (hereinafter called “titanium-copper”) is used for connector materials, etc., and in recently, demands therefore have progressively increased. In order to cope with this trend, various research and development concerning precipitation hardening of the titanium-copper has been performed.[0005]Moreover, in conventional titanium-copper, in some cases, for example, Ni and Al are added (for example, see Japanese Laid-Open Patent Publication No. SHO 50-53228 (pages 1 and 2)), in other cases, Al and Mg are added (for example, see Japanese Laid-Open Patent Publication No. SHO 50-110927 (Pages 1 and 2)), and in ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C22F1/08C22C9/00C22C1/00
CPCC22F1/08C22C9/00
Inventor SUGAWARA, YASUTAKAFUKAMACHI, KAZUHIKO
Owner JX NIPPON MINING & METALS CORP