Decorative product and timepiece

A technology for decorations and clocks, which is applied to clocks, layered products, transportation and packaging, etc. It can solve the problems of insufficient hardness, easy damage, and difficulty in obtaining exterior parts for watches and clocks, and achieve excellent The effect of hardness and appearance

Inactive Publication Date: 2007-09-19
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to obtain a watch exterior part with a very excellent appearance by such a method.
Moreover, the exterior parts for watches and clocks obtained in this way do not have sufficient hardness and are easily damaged when subjected to a large external force.

Method used

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  • Decorative product and timepiece
  • Decorative product and timepiece
  • Decorative product and timepiece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] An ornament (watch case (bottom cover)) was manufactured in the manner shown below.

[0100] First, a Fe—Cr-based alloy containing Fe as a main component is prepared. This Fe-Cr based alloy has the composition: Fe-18.3 wt % Cr-2.25 wt % Mo-0.15 wt % Nb-0.26 wt % Mn-0.006 wt % C-0.001 wt % S-0.022 wt % P-0.21 wt % %Si, which is mainly composed of ferrite phase. In addition, the content of each element inevitably contained as an impurity other than these elements is less than 0.001% by weight.

[0101] Next, using this Fe-Cr-based alloy, a base material having the shape of a watch case (bottom cover) is produced by forging, and necessary parts are cut and polished.

[0102] Next, the substrate is washed. As washing of the base material, first, alkaline electrolytic degreasing was performed for 30 seconds, and then alkaline immersion degreasing was performed for 30 seconds. Thereafter, neutralization for 10 seconds, water washing for 10 seconds, and pure water washing ...

Embodiment 2～7

[0111] Except changing the composition and the austenitizing treatment conditions of the Fe-Cr alloy that constitutes the base material (substrate for manufacturing the decorative article) as shown in Table 1, the same operation was performed as in the above-mentioned Example 1, and the decorative article ( watch case (bottom cover)).

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Abstract

The decoration 1 includes a base material 2 mainly composed of Fe-Cr alloy. The base material 2 includes a base part 21 and an austenite layer 22 which is made into austenite by addition of nitrogen atoms. The thickness of the austenite layer 22 is preferably 5-500 [mu]m. The content of the nitrogen in the austenite layer 22 is preferably 0.3-1.2 wt.%. The content of Ni in the base material 2 is preferably <=0.05 wt.%.

Description

technical field [0001] The present invention relates to ornaments and clocks. Background technique [0002] Decorations such as watch exterior parts are required to have excellent appearance. [0003] Hitherto, in order to achieve such a purpose, silver-white metal materials such as Pd, Rd, and Pt have been used as constituent materials of decorative items. However, these metal materials are all precious metals, and have problems such as increasing the manufacturing cost of decorative items. In addition, Ti, stainless steel, and the like are used as a silver-white material instead of the noble metal. [0004] In addition, the decorations are required to have excellent appearance, but decorations made of the above-mentioned materials (especially watch exterior parts and accessories) have problems such as easy scratches on the surface and a significant decrease in appearance due to long-term use. [0005] On the other hand, it has been proposed that ferrite stainless steel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F17/00C23C8/26C21D9/00B32B15/01G04B45/00C22C38/18
CPCC22C38/22C21D8/0257Y10T428/12958C22C38/004G04B37/221C22C38/26C23C8/26C21D6/002C22C38/18G04B37/22
Inventor 高泽幸树
Owner SEIKO EPSON CORP
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