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Copper alloy plate having excellent anti-stress relaxation properties

A copper alloy plate, stress-resistant technology, applied in the direction of coupling devices, parts of connecting devices, electrical components, etc., can solve the problem that the stress relaxation rate has not been fully improved

Active Publication Date: 2010-12-22
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned Patent Documents 1 to 5, the stress relaxation rate in the direction perpendicular to the rolling direction has not been sufficiently improved, and further improvement is sought.

Method used

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  • Copper alloy plate having excellent anti-stress relaxation properties
  • Copper alloy plate having excellent anti-stress relaxation properties
  • Copper alloy plate having excellent anti-stress relaxation properties

Examples

Experimental program
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Embodiment

[0097] Embodiments of the present invention will be described below. Copper alloy thin plates having various densities of aggregates of atoms composed of 15 or more and less than 100 atoms specified in the present invention can be produced under the above-mentioned preferred production conditions. Furthermore, various properties such as electrical conductivity, tensile strength, 0.2% proof strength, and stress relaxation resistance of each of these copper alloy thin plates were evaluated.

[0098] Specifically, the copper alloys of the chemical composition shown in Table 1 (the remainder of the element amount is Cu) were melted in a centerless furnace, and then were melted in a semi-continuous casting method (the cooling and solidification speed of casting 2° C. / sec) to obtain an ingot having a thickness of 70 mm×width 200 mm×length 500 mm. These respective ingots were jointly rolled under the following conditions to manufacture copper alloy thin plates. That is, after face-...

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Abstract

The invention provides a Cu-Ni-Sn-P alloy sheet satisfying the resistance property of stress relaxation in the direction perpendicular to the rolling direction and excellent in the other necessary properties as terminals and connectors. The invention relates to analloy sheet having a specific composition, which is made to contain specific atomic clusters containing at least any of an Ni atom or a P atom, as detected with a three-dimensional atom probe field ion microscope, in a specific density, by increasing the reduction ratio in the final cold rolling and by intentionally shortening the time for the rolling and the time to be taken before the final annealing at low temperature, and of which the necessary properties as a terminal or connector 3 are improved in that the resistance property of stress relaxation thereof in the direction perpendicular to the rolling direction is enhanced and the difference (anisotropy) in the resistance property of stress relaxation thereof between the parallel direction and the perpendicular direction to the rolling direction is reduced.

Description

technical field [0001] The present invention relates to a copper alloy sheet excellent in stress relaxation resistance, and more particularly to a copper alloy sheet excellent in stress relaxation resistance suitable for connection parts such as automotive terminals and connectors. Background technique [0002] Connecting parts such as terminals and connectors for automobiles in recent years have been pursuing performance that can ensure reliability in high-temperature environments such as engine compartments. One of the most important characteristics of the reliability in this high-temperature environment is the maintenance characteristic of the contact fitting force, that is, the stress relaxation resistance characteristic. [0003] figure 2 Shows the structure of a typical box-shaped connector (female terminal 3) as a connecting part such as a terminal and connector for an automobile. figure 2 (a) represents a front view, figure 2 (b) shows a cross-sectional view. in ...

Claims

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Application Information

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IPC IPC(8): C22C9/06C22C9/00C22C9/02C22F1/00C22F1/08
CPCC22C9/06H01R13/03C22C9/00C22C9/02C22F1/08H01R13/113
Inventor 有贺康博
Owner KOBE STEEL LTD
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