JPH02225657A - Outer ornament parts for watch - Google Patents

Abstract

PURPOSE:To provide the parts having a high-quality film with a new color tone and improved in ornamental value by forming a Ti compound having a specific color tone of purplish red type on the surface of a stock by an ion plating method. CONSTITUTION:Surface cleaning is carried out by applying ion bombardment to a stock of stainless steel, etc., in an ion plating apparatus by using Ar gas, etc. Subsequently, the above stock is ion-plated with pure Ti and N2 gas as a reactant gas is introduced into the above apparatus, by which a TiN layer is formed on the above surface. Then, C2H2 gas in further introduced to form a film of a Ti compound of Ti, N, and C. The color tone of the film is of purplish red type, and this film has a color tone of 40%<=L*<=80%, 3<=a*<=20, and -20<=b*<=0 in the color space of L*, a*, and b* specified by JIS. Moreover, it is desirable that the above Ti compound is colored by means of a compound of Ti, O, and C, other than the compound of Ti, N, and C.

Description

[Detailed description of the invention] [Industrial field of application] The present invention is a watch using the ion blating method [Prior art] Techniques for forming a reddish-purple coating include alumite, electrodeposition coating, and electrostatic coating. Painting or the like is generally used.

[Problems to be solved by the invention] When used as exterior parts for watches, alumite and paint using conventional techniques have poor wear resistance and cannot withstand long-term use.Furthermore, when alumite is scratched, its corrosion resistance is extremely poor. It also has the problem of lacking a metallic texture in terms of appearance.

Therefore, the present invention is intended to solve these problems, and its purpose is to provide a surface treatment with a reddish-purple color tone that is excellent in wear resistance and corrosion resistance, and has an unprecedented metallic luster. There are several companies that provide technology to which exterior parts for watches can be applied.

[Means for Solving the Problems] The exterior parts for watches of the present invention include (1) a Ti compound is formed on the surface of the material by using an ion blating method, and the color tone of the Ti compound is reddish-purple;
L*, a* b* specified in 4SZ810S-2068
In color space, 40%≦L*≦80%, 3≦eL*≦
20. -20≦b*≦0, and (2) the Ti compound is Ti, N, C or Ti゜0.0.
It is characterized by its color development due to the compound.

[Function] According to the present invention, it is known that a hard film can be produced by forming a Ti compound film using the ion blasting method. The coating is abrasion resistant.

It is well known that it is a film with excellent scratch resistance and a metallic luster. The reddish-purple thread-colored coating of the present invention is made of Ti
, N, (!), and by controlling the partial pressure ratio of N2 gas and c2H gas during treatment, a reddish-purple thread color coating can be formed. Ti, N, and C compound coatings are sufficient for the exterior parts of watches. However, the reddish-purple color of the present invention is also possible with Ti, O, C compounds;
.

A film of higher quality can be formed compared to H,CV compounds.

In other words, since Ti oxide is formed in the coating, the surface layer is partially mixed with glassy material, and the hardness is even higher than that of Ti, IJ, (! compounds.
The hardness of the formed material was Hv1200-1100, but Ti
．． The hardness of O,C compound after forming 5μ door is Hv1400
~1700. In addition, the presence of glass improves the surface roughness of the coating. This has Ti, N, C compounds and Ti on the mirror surface.

When a Ti.0.0 compound was formed and compared, the fingerprint was Ti. 0.
This can be seen from the fact that the film C is more difficult to adhere to. Furthermore, Ti,
N, O, C! Compounds have similar characteristics, but the problem is that controlling the conditions in terms of color tone is complicated. A Ti, N, C compound or a Ti, O, C compound is optimal in order to enable stable mass production and satisfy quality as an exterior part for a watch.

The film thickness when applied to exterior parts for watches is cL1μTr.
L~4μ wind height is applicable, but preferably 0.3μm
~2 μm can be said to be optimal in terms of quality and productivity. The color tone as an exterior part for a watch is 40%≦L*≦80%, S≦α
≦20. It has an unprecedented new color tone in the range of −20≦α≦0. Regarding glossiness, if L* is less than 40%, it will become too dark, and if it exceeds 80%, glitter will become strong, so 40%≦L*≦80% is preferable, and more preferably 50%≦L.
≦65% is the most preferred range. Also, if α* b* is too large (too much, the reddish and yellowish hues will be too strong; if it is too small, the greenish and bluish hues will be too strong), so 3≦α≦
20. -20≦b*≦0 is preferable, and as a reddish-purple color, 7≦cL*≦15 is more preferable. −15≦b*≦−5
is most preferable. In addition, in addition to the ion blating method of the present invention, methods for producing reddish-purple coatings include similar physical vapor deposition methods (PVD methods), <tuttering method or chemical vapor deposition method (OVD method), and plasma chemical vapor deposition method. method (POVD method) etc. can be easily applied.

Materials used in the present invention include ceramic, carbide, stainless steel,
Steel alloys, zinc, zinc alloys, etc. can be applied, but since most of the coatings obtained by the ion-blating method are relatively comprised of glass balls, corrosion resistance must be satisfied before applying the coating. (It is necessary. Ceramic, carbide, and stainless steel substrates have good corrosion resistance themselves, so base plating is basically not required. However, stainless steel substrates with a high free-cutting component such as S (sulfur) have slightly corrosion resistance. Therefore, it is necessary to ensure the corrosion resistance of the substrate by using a single layer or a stack of several layers of gold, gold alloy, chromium, palladium, palladium alloy, or rhodium plating layer as an underlayer.Also, if steel alloy, zinc, or zinc alloy is used as a substrate If this is the case, it is necessary to use plating to ensure corrosion resistance by plating copper, nickel, or nickel alloy in a single layer or in layers, and then plating gold, gold alloy, chromium, palladium, palladium alloy, rhodium, etc. in multiple layers or in multiple layers. In particular, for copper alloy, zinc, and zinc alloy substrates, by applying the above plating, the substrate material is prevented from being directly exposed to high temperature and high vacuum atmosphere during the ion plating process, and the inside of the substrate material is It is possible to prevent the temperature from rising and prevent the occurrence of blisters due to the dezincing phenomenon.The optimal thickness of the base plating is 2 to 5 microns from the viewpoint of productivity and functionality, whether it is a single layer or a laminated layer. However, the basic quality does not change even if the range is expanded from 15 microns to 10 microns.The present invention will be described below based on examples.

[Example 1] Watch case using 5US304 and 2 cm x 20
× Using a Tesbis made of a mirror-finished plate with a thickness of 11, heating was performed at 300°C for 30 minutes in an ion blating device, and the surface was cleaned by ion bombardment using Ar gas. After that, pure Ti was coated with a thickness of 12 μm.
Ion blasting was performed and N gas was introduced as a reactive gas to form an 'I'iN layer of 1.0 μm. Furthermore a2H2
Gas was introduced, and N2 gas and 2 g of gas were introduced at a ratio of 7:1 to 4 x 10-'torr to form a Ti, N, (+ film) with a thickness of 5 μm.

The film hardness at this time was Hvl 250, and the color tone at this time was L*=60%, α*=10. b*:=-12. Quality tests on watch cases include artificial sweat corrosion resistance tests (40
℃×48H), artificial seawater corrosion resistance test (40℃×48H)
) P bending test (90'C bending), heat shock test (6oO℃ x 10 minutes heating → rapid cooling, repeated 5 times), abrasion test (5001 load applied to the watch case on cowhide and 5cW1 stroke on the side of the watch case) Round trip 1,5
All the above test results showed that the quality as a watch case was sufficiently satisfied, and the color tone was new and had sufficient commercial value as an exterior part for a watch.

(Example 2) Bs material, Ni plating 2μi, Pd as plating for the bottom
-Ion blating was performed on a watch case with a M1 plated 6μ door in the same manner as in Example-1. However, the heating temperature was 180°C for 30 minutes, and the pure Ti layer αi μrn,
After forming a TiO layer CL56m, 02H gas and 02 gas were introduced at a ratio of 3:1 up to 8×10-'torr to form a C1,4μ door. The film hardness at this time is Hv
/ 500, color tone is L*=50%, α -7,b
--15. The results of the same quality test as in Example 1 showed that there were no problems at all, and the color tone was sufficient to have a value as a memento as a watch case.

[Effects of the Invention] As described above, it has become possible to provide an exterior part for a watch that has a novel reddish-purple color tone and a high-quality coating that has high decorative value. This coating can be applied not only to exterior parts for watches, but also to decorative parts such as eyeglass frames and lighters.

that's all Applicant Seifu Ebson Co., Ltd.

Claims (2)

[Claims] (1) Using ion plating method on the material surface, T
i compound is formed, the color tone of the Ti compound is reddish-purple, and J
L^*, a^*, specified in ISZ8105-2068
b^* In color space, 40%≦L^*≦80%, 3≦
An exterior part for a watch, characterized in that it has a color tone of a^*≦20, -20≦b^*≦0. (2) The Ti compound is Ti, N, C or Ti, O, C
2. The exterior part for a watch according to claim 1, which is colored by a compound.