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Metallic zipper member and zipper equipped with same

A fastener and component technology, applied in the field of metal fastener components, can solve the problems of high price, insufficient strength, deterioration of resistance to seasonal cracking, etc. The effect of season cracking

Active Publication Date: 2017-12-01
YKK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there is a problem that the corrosion resistance is significantly deteriorated due to the presence of zinc in copper. In fastener parts manufactured by using a copper alloy with a large amount of zinc, especially by cold working such as stamping, there is a problem of residual corrosion. Quarter cracking problems caused by processing strain
If more than 10% by mass of Zn is contained in the copper alloy, the season cracking resistance will deteriorate rapidly
[0004] In order to improve the quarter-crack resistance of Cu-Zn alloys, it is conceivable to make the proportion of zinc less than 10%, but such alloys not only increase the material price, but also become insufficient in strength. Therefore, copper alloys for fasteners is not ideal

Method used

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  • Metallic zipper member and zipper equipped with same
  • Metallic zipper member and zipper equipped with same
  • Metallic zipper member and zipper equipped with same

Examples

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Embodiment

[0095] Hereinafter, examples of the present invention are shown, but these examples are provided for better understanding of the present invention and its advantages, and are not intended to limit the present invention.

[0096]

[0097] As raw materials, Cu (purity: 99.99% by mass or more), Zn (purity: 99.9% by mass or more), and Mn (purity: 99.9% by mass or more) were used. The raw materials are formulated and melted in a continuous casting unit, and then continuous wire is produced by continuous casting. The obtained continuous wire was subjected to drawing treatment. Next, annealing was performed at 500° C. for 1 hour in a reducing atmosphere containing about 10 mass ppm of oxygen to restore cold workability, and then cold rolling was used to manufacture a continuous shaped wire rod having a substantially Y-shaped cross section. After that, cutting, punching, bending, and riveting are performed to form the element shape of the size "5R" specified in the YKK Corporation ...

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Abstract

The invention discloses a metallic zipper member and a zipper equipped with the same. The purpose of the present invention is to improve the season cracking resistance of a metallic zipper member of which the base material comprises a zinc-containing copper alloy. A metallic zipper member of which the base material comprises a zinc-containing copper alloy and of which the surface underegoes an anti-corrosive treatment, said metallic zipper member having such a property that, when the metallic zipper member is analyzed with a scanning X-ray photoelectron spectroscopic analyzer, the maximum value of the Mn atom concentration is detected at a depth within 100 nm from the surface.

Description

technical field [0001] The present invention relates to a metal fastening member using a copper alloy as a base material. Moreover, this invention relates to the fastener provided with the metal fastening member which used copper alloy as a base material. Background technique [0002] In fastener products, brass, red copper, etc. Copper alloy fasteners such as zinc-containing copper alloys (hereinafter also referred to as "Cu-Zn alloys"). Zinc has the effect of increasing the strength, hardness, and uniform deformation of the alloy through solid solution. In addition, the price of zinc is lower than that of copper, so the economy is also excellent. Therefore, zinc is routinely added to copper alloys. Alloying elements for firmware. [0003] However, there is a problem that the corrosion resistance is significantly deteriorated due to the presence of zinc in copper. In fastener parts manufactured by using a copper alloy with a large amount of zinc, especially by cold worki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04A44B19/00C23F11/00
CPCA44B19/24C22C9/04C23F11/149C23F11/00Y10T24/25A44B19/02
Inventor 小泉琢哉木户康太吉村泰治太田球道长谷川格秋津和哉胜见百合
Owner YKK CORP
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