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Copper alloy material, and method for production thereof

A manufacturing method and technology of copper alloys, applied in the direction of metal rolling, etc., can solve the problems of increased surface wrinkles on the curved part, difficulty in combining strength, electrical conductivity, stress relaxation resistance, bending workability, coating cracking, etc.

Active Publication Date: 2010-03-24
FURUKAWA ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the crystal grain size is large, there will be the following problems: cracks will be generated due to the promotion of local deformation during bending; the wrinkles on the surface of the bent portion will become larger, so when the bent portion is used as a contact, current concentration will occur. Plating cracks on the surface of the material, etc.
[0008] However, it is difficult to achieve strength, electrical conductivity, stress relaxation resistance, and bending workability at the same time, and it is not yet possible to satisfy all of these required properties.

Method used

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  • Copper alloy material, and method for production thereof
  • Copper alloy material, and method for production thereof
  • Copper alloy material, and method for production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] By following the following Table 1-1, Table 1-2 shown in the composition / composition (mass %) mixed X element and Y element, the balance including Cu and unavoidable impurities alloy with high frequency melting furnace melting, its Casting is performed at a cooling rate of 0.1 to 100°C / sec to obtain an ingot. After homogenizing heat treatment at 900-1050°C for 0.5-10hrs, hot working with a reduction in area of ​​50% or more at a treatment temperature of 650°C or higher, water quenching, and face cutting to remove scale .

[0073] In the subsequent process, any (shown) treatment in the following steps A to D is performed, thereby producing a copper alloy material.

[0074] Step A: implement cold working with an area reduction rate of 50-98%, implement melt heat treatment at 800-1000°C, implement cold working with an area reduction rate of 5-50%, implement aging precipitation heat treatment at 400-650°C, and implement 5 ~50% finishing cold working (Shishangげ inter-col...

Embodiment 2

[0085] According to the same manufacturing method as described in the above-mentioned Example 1, X elements, Y elements, and Z elements were mixed with the ingredients / compositions shown in the following Table 2-1 and Table 2-2, and the remainder included Cu and optional elements. Copper alloys with impurities to be avoided are made into alloy materials, and each part of them is used as the test material. The properties of each test material were investigated in the same manner as in Example 1, and the results obtained are shown in Table 2-1 and Table 2-2.

[0086] [table 2-1]

[0087]

[0088] [Table 2-2]

[0089]

[0090] It can be seen from Table 2-1 that Example 2-1 of the present invention to Example 2-32 of the present invention are excellent in yield strength, electrical conductivity, and stress relaxation resistance. However, as shown in Table 2-2, when the predetermined value of the component amount of this invention is not satisfied, a characteristic is not g...

Embodiment 3

[0092] According to the same manufacturing method as described in the above-mentioned Example 1, X elements, Y elements, and Z elements were mixed with the components / compositions shown in the following Table 3-1 and Table 3-2, and the remainder included Cu and optional elements. Copper alloys with impurities to be avoided are made into alloy materials, and each part of them is used as the test material. However, comparative examples 3-1 to 3-3 performed solution heat treatment at a temperature higher by about 20 to 30° C. than the respective production steps of Invention Example 3-1 to Invention Example 3-3.

[0093] In the same manner as in Example 1, the properties of the test material were investigated for yield strength [YS], electrical conductivity [EC] and stress relaxation rate [SR]. In addition, average grain size [GS] and bending workability [R / t], the obtained results are shown in Table 3-1 and Table 3-2.

[0094] [Table 3-1]

[0095]

[0096] [Table 3-2]

[...

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Abstract

Disclosed is a copper alloy material comprising 0.1 to 4 mass% of an element X [wherein the element X represents at least one transition element selected from Ni, Fe, Co and Cr] and 0.01 to 3 mass% of an element Y, wherein the element Y represents at least one element selected from Ti, Si, Zr and Hf, with the remainder being copper and unavoidable impurities. The copper alloy material has an electrical conductivity of 50% IACS or more, an yield strength of 600 MPa or more, and a stress relaxation rate of 20% or less as measured after the copper alloy material is maintained for 1000 hours while applying a stress of 80% of the yield strength.

Description

technical field [0001] The present invention relates to copper alloy material and its manufacturing method. Background technique [0002] The characteristic items required for copper alloy materials used for lead frames, connectors, terminal materials, etc. for electronic and electrical equipment (such as connectors, terminal materials, relays, switches, sockets, etc. for automobiles) are electrical conductivity, yield Strength (yield stress), tensile strength, bending workability, stress relaxation resistance. In recent years, the demand for these characteristics has been increasing due to the miniaturization, weight reduction, higher functionality, higher density mounting, and higher temperature of the use environment of electrical and electronic equipment. [0003] Conventionally, copper-based materials such as phosphor bronze, red copper, and brass have been widely used in addition to iron-based materials as materials for electrical and electronic equipment. In these a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00B21B1/22B21B3/00C22C9/06C22F1/08C22F1/00
CPCC22C9/00C22F1/08C22C9/06
Inventor 金子洋三原邦照江口立彦
Owner FURUKAWA ELECTRIC CO LTD
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