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Conductive material for connecting parts with excellent micro-sliding wear resistance

A technology for conductive materials and connecting parts, applied in the field of conductive materials for connecting parts, can solve problems such as increased insertion force, and achieve improved micro-sliding wear resistance, excellent micro-sliding wear resistance, and less reduction in contact pressure. Effect

Inactive Publication Date: 2019-03-05
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned ECU is connected by a connector that accommodates a plurality of mating terminals, so the insertion force at the time of connection increases as the number of base stations increases

Method used

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  • Conductive material for connecting parts with excellent micro-sliding wear resistance
  • Conductive material for connecting parts with excellent micro-sliding wear resistance
  • Conductive material for connecting parts with excellent micro-sliding wear resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach A

[0044] Hereinafter, an embodiment corresponding to claim 1 of the present invention will be described.

[0045] [Copper alloy base material]

[0046] (1) Characteristics of copper alloy

[0047] The stress relaxation rate of Cu-Ni-Si alloys widely used in fitting-type terminals is 12 to 20% when the bending stress of 80% of the yield strength of 0.2% is loaded and kept for 1000 hours at a holding temperature of 150°C. . However, the stress relaxation rate increases as the holding temperature increases, and becomes 15 to 25% at 160°C, 25 to 30% at 180°C, and 30 to 40% at 200°C. In the case of a female terminal with strict requirements on the stress relaxation rate, as described above, the stress relaxation rate after holding for 1000 hours at the assumed use temperature is often required to be 25% or less as the design criterion. Therefore, when the assumed operating temperature exceeds, for example, 160° C., it is difficult to use a Cu—Ni—Si alloy as a raw material of the f...

Embodiment approach B

[0121] Hereinafter, an embodiment corresponding to claim 3 of the present invention will be described.

[0122] [Copper alloy base material]

[0123] (1) Composition of Cu-Fe-P alloy

[0124] The copper alloy strip according to the present embodiment is a Cu—Fe—P alloy containing Fe: 0.01 to 2.6% by mass, P: 0.01 to 0.3% by mass, and the remainder is Cu and unavoidable impurities.

[0125] Fe is a main element that precipitates in the form of Fe simple substance or Fe-based intermetallic compound and improves the strength and heat resistance of the copper alloy. When the content of Fe is less than 0.01% by mass, the amount of precipitates formed is small, and although the improvement of the electrical conductivity is satisfied, the contribution to the improvement of the strength is insufficient, and the strength is insufficient. On the other hand, if the content of Fe exceeds 2.6% by mass, the electrical conductivity tends to decrease, and if an attempt is made to increase t...

Embodiment approach C

[0143] Hereinafter, an embodiment corresponding to claim 5 of the present invention will be described.

[0144] [Copper alloy base material]

[0145] (1) Composition of Cu-Zn alloy

[0146] The Cu—Zn alloy strip according to the present embodiment contains 10 to 40% by mass of Zn, and the balance is composed of Cu and unavoidable impurities. This Cu—Zn alloy is called red copper and brass, and includes C2200, C2300, C2400, C2600, C2700, and C2801 specified in JIS H 3100.

[0147] If the content of Zn is less than 10% by mass, the strength required as a fitting terminal will be insufficient. On the other hand, when the content of Zn exceeds 40% by mass, bending workability is deteriorated due to a decrease in elongation. Therefore, the content of Zn is set to 10 to 40% by mass. The lower limit of the Zn content is preferably 12 mass%, more preferably 15 mass%, and the upper limit is preferably 38 mass%, more preferably 35 mass%.

[0148] In order to improve the strength, s...

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Abstract

The conductive material for connecting parts of the present invention is formed on the surface of a base material comprising a copper alloy containing specific amounts of Cr and Zr, Fe and P, or Zn, respectively, with a Cu content of 20 to 70 at% and an average thickness of 0.2 to 3.0. A Cu-Sn alloy coating layer of μm, and a Sn coating layer with an average thickness of 0.05 to 5.0 μm.

Description

technical field [0001] The present invention relates to a conductive material for connecting parts such as terminals mainly used in the fields of motor vehicles and general livelihood, and in particular to a conductive material for connecting parts with Sn plating that uses copper alloy as a base material and can reduce micro-sliding wear. Background technique [0002] As materials for mating terminals for multi-pole connectors used in equipment for electronically controlling motor vehicles (ECU: Electronic Control Unit), etc., Cu-Ni-Si series, Cu-Ni-Sn-P series, Cu-Ni-Sn-P series, Various copper alloys such as Cu-Fe-P system and Cu-Zn system. A mating terminal is composed of a male terminal and a female terminal. Considering the use of the mating terminal, usage environment, price, etc., generally speaking, other copper alloys are used for the male terminal and the female terminal. [0003] Among them, the Cu-Ni-Si alloy has a tensile strength of more than 600 MPa, a moder...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D7/00C22C9/00C22C9/01C22C9/02C22C9/04C22C9/05C22C9/06C22C9/10C22C13/00C25D5/10C25D5/12C25D5/50H01B5/02H01R13/03
CPCC25D5/10C25D5/12C22C9/00C22C9/01C22C9/04C22C9/05C22C9/06C22C9/10C22C13/00H01B5/02H01R13/03C23C28/021C22C9/02C25D5/505C25D7/00C25D5/617C25D5/605C25D5/50
Inventor 鹤将嘉隅野裕也
Owner KOBE STEEL LTD
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