JPS581073A - Manufacture of external parts of gold color hard wrist watch - Google Patents

Abstract

PURPOSE:To elevate abrasion resistance, corrosion resistance, and an ornamental property of a titled wrist watch, by forming a covering which consists of Ni, an Ni alloy, Cr, a Cr alloy, etc. and has specific hardness or above, on an alloy base metal of low hardness, which can be worked easily, by a wet plating method, and also covering said covering with titanium nitride by an ion plating method. CONSTITUTION:As for a base metal, a low hardness material which can be worked easily, such as a Cu alloy brass, nickel silver, etc., an alloy of Al, Zn, etc., and others us used. To this base metal, hard plating whose hardness is >=300HV, using Ni, an Ni alloy, Cr, a Cr alloy, etc. is performed directly or indirectly by a wet plating method. Also, on said plating, gold colorcovering whose main component is titanium nitride exceeding hardness 450HV is performed by an ion plating method.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a golden hard wristwatch, which has excellent abrasion resistance and corrosion resistance, and is highly decorative.

AM products other than wristwatches are always required to be decorative and have excellent wear resistance and corrosion resistance.

The exterior parts of gold watches are made of gold, gold alloy, gold-colored cemented carbide, etc. as the base material, and then finished with a base material of porcelain, brass, nickel silver, full-grained metal, zinc, stainless steel, and turtle. Shishitsu which is coated with gold or agglomerated gold plating etc.
It is being

In the case of gold or gold alloy, it has a good feel but is very expensive and hard work, and has the disadvantage of being easily scratched.In the case of carbide containing metal, it has excellent hardness and good color tone. However, the raw materials are expensive and the processing is
L=(,L also has the drawback of being very brittle.

Stainless steel material a4Il! El
Titanium chloride is coated with a colored coating and is used in steel, but the machining power of stainless steel itself is higher than that of copper alloys such as brass, wax, etc. Low;
The product has major drawbacks that make it difficult to use. - However, metal alloys such as brass and nickel silver, which are relatively easy to process, and gold and gold alloy plating, such as zinc and nickel metal, can be electromagnetized to IIw to produce aluminum exterior parts. However, it has some disadvantages, such as the appearance being seriously damaged due to scratches and abrasion of the covering material.

Titanium nitride has good adhesion to steel alloys such as brass and nickel silver, as well as alloys such as zinc and aluminum, and can be applied to titanium nitride using the ion and plate tin method in a state that has decorative value without damaging its appearance. An inexpensive hard gold watch with a layer of 1 ut
It was desired to develop a manufacturing method for producing T-products.

In order to obtain titanium nitride by ion or platen/ill with a method with good adhesion, it is necessary to heat the plated material in a low vacuum at a temperature of 100°C or higher.
Copper alloys such as nickel silver, zinc, aluminum alloys, etc. have titanium nitride coatings, so the surface changes in quality due to the heat of the turtle, causing phenomena such as tarnishing and discoloration, which makes it difficult for AM products other than watches. Such things have no value as ornaments (
-&C, could not be put into practical use.

In addition, in order to prevent damage to the appearance, electrified titanium gold ions and platen l method are used without increasing the temperature of the object to be plated.
When deposited, a film with good appearance was obtained in the form of a thin film, but the layering properties were poor (in fact, it could not be used).

Furthermore, even if a coating of titanium is obtained with good adhesion to steel alloys such as Mllk and Ryol 1=Um alloys with poor appearance gloss, the hardness of the steel alloys, zinc, aluminum, etc. themselves is low. Because the titanium nitride layered on top of it has a hard metal of 8001 mm or higher, the base is soft, so it can be easily damaged by artificial sweat and an atmosphere of 4x4. JIK corrosion occurred, making it unsuitable for practical use.

The present invention solves the above-mentioned drawbacks, and provides a hard, wear-resistant material with good layer density, glossy appearance, and predominant golden color.
This is because we manufacture watch exterior parts with good corrosion resistance in a compact size.

In order to obtain the excellent abrasion resistance, corrosion resistance, and color tone that are required for wristwatches, the inventors conducted research and developed a method for producing an aS product with excellent ζζ properties. Features of this invention*
3001 made of Fi steel alloy, zinc, Aluminum alloy five alloy (based on the Murakami Kl1 method of production of watch outer ring parts), nickel, nickel alloy, Rim, Tarom alloy, etc.
Because it has a hardness of 17 or more, hard alloy t [III or indirectly coated with 7t &, ion, plate tin method]
, with a gold coating of titanium nitride. - Capacity for machining steel alloys such as brass and nickel silver, and alloys such as aluminum and zinc as base materials! For steel alloys such as brass and nickel silver, which are made of low-rigidity materials, a nickel metal plate is applied directly to the metal plate, and a nickel metal plate or a hard metal metal plate is applied directly to the aluminum plate. Zinc alloys are coated with steel plating, and as with steel alloys, nickel, rim, etc. are used to make them harder than the summer heat. ,
In order to create a hard wristwatch outer product by attaching a hard film of cirrhosis 45 mm or higher containing titanium monochloride as a companion component, an inexpensive hard outer wrist watch 1ISA of the present invention can be obtained. For.

According to this development, it is possible to obtain exterior parts for wristwatches that have good corrosion resistance, excellent wear resistance, and are highly corrosion resistant, even if they are made of hard materials that are conventionally difficult to process. There are advantages.

This example will be described below.

Example 1 The watch side was made of brass and had a diamond cut F finish, and a nickel plating with a hardness of 5 soiiv top was applied to it using a hot plating method, and then 1p of titanium nitride was deposited on top of this using an ion plating method. A product with an excellent appearance of golden color C23.5 and 5-1 m golden color was obtained. 1
One side hardness is 7! @ (1 ma) 6) A gold-coloured hard wristwatch exterior part that is sufficiently durable for practical use was obtained.

The ion plating method was carried out under the following conditions.

Chilbong gas 100 mA/flags inflow, W gas pressure 0.0? T. Dede, l590ma! , Bombard Asahi 311 for 2 minutes, then nitrogen gas 90 sj/
Kamo (duck), gas pressure 9xlO--~1,3x1
0 first, titanium metal 2. (ltlB power supply 6.s!, 590mm, evaporation under the conditions of addition, ionization power supply 30V, 65-75mm, no (I finish 350-4mm)
507 4.5mm to 5mm. Then let it cool for 1 x 10 minutes and take it out.

In the above embodiment, directly on the brass wristwatch side without using the method of the present invention,
When a layer of titanium nitride was applied using the ion plating method under similar conditions, the appearance turned black and gray with localized scratches, making it unsuitable for practical use as an exterior part for a wristwatch. Regarding corrosion resistance, the products obtained according to the present invention did not show any abnormality in an immersion test at 40° C. in an artificial sweat test solution for 168 hours.

The following artificial sweat soaking liquids are used.9.

M a c L 9, 91 / L1! am
s, gH@ts O, 81/L(NH,), 00
1, 'II/L2811MH1 water 0
,07sA/A@5 $ OH,OH(Oji000H1
, 1 t7tOn"u'u O, 21/ is the total volume of water IL.

Example 2 A watch band is made of nickel silver material (5μ glossy nickel plating is applied by wet plating method, and the hardness is 520H).
10μ of titanium nitride (95es)-!J (51) alloy plating was applied, and 0.8μ of titanium nitride was applied using the ion plating method. -Mt alloy color) was obtained.

A material with good layer density and surface hardness of 1120 (MY) was obtained, which was sufficiently durable for practical use as a golden hard wristwatch exterior part.

When titanium nitride was similarly applied to the nickel silver watch band of the above example by the ion plating method,
The appearance is grayish black, with some peeling occurring locally.
It could not be put to practical use as an exterior part for a wristwatch.

As for corrosion resistance, the products obtained according to the present invention showed no abnormality in an immersion test at 40° C. for 168 hours in an artificial sweat test solution.

The ion plating method was performed under the following conditions.

Argon gas 130-7 immersion js inflow, gas pressure 0.03
Ding/rde, 900 v~tooovo. 5
Bombardment was performed for 40 minutes at ~1 μm. Next, nitrogen gas 60 - / inertia i1 acetylene gas 0, 6 eu / inertia
6. Let it flow in, set the gas pressure to 1#2XtO-4, and add 11t2.01tlB electric IN.6. Evaporate under the conditions of OKV, 520 μm, and η minutes, and the ionization power source at that time is 4
1~457 50~70mu,ノ(Iryosu 350-400
7 3.5 to 4 mm. Thereafter, it was heated to 1.2 x 10'' and then cooled for 9 minutes.

Example 3: The wristwatch side is made of zinc die-casting. 15 layers of copper plating and 20 layers of nickel plating with a hardness of 31,511V are applied to this using a wet plating method. When a layer of titanium nitride is applied under the same conditions as Example 2, the appearance is as follows. Shiny Yu (bft-22Kt
A golden-yellow coating of M5-M1 alloy color was obtained.

The adhesion was good, the surface hardness was 82G (IIV), the corrosion resistance was also good, and a gold-colored hard arm was able to withstand practical use as an exterior part.

In the above example, titanium nitride was added to the zinc die-cast wristwatch side using the ion plating method under the same conditions as it was, and it turned out to be pitch black!
Friends that do not adhere properly. It could not be put to practical use as an exterior part for a wristwatch.

Example 4 The watch side was made of nickel silver material, and a 1ON glossy nickel plating with a hardness of 400 HV was applied to it using a wet plating method, and then a hard chrome plating of 62017 'i5μ was applied, under the same conditions as in Example 20. When titanium nitride was deposited, a 22.5Kt A%-M4 alloy-colored golden film with excellent appearance and gloss was obtained. Adhesion is also good,
The surface hardness was 1010IIV. The corrosion resistance was also good, and a product that could be used practically as a golden hard wristwatch exterior part was obtained. Applicant: Arakawa Kako Co., Ltd. Agent: Tsutomu Mogami, Patent Attorney

Claims (1)

[Claims] As a base material, brass, copper alloys such as copper alloys, aluminum,
The processing capacity of alloys such as lead and lead alloys is J & low hardness materials, and the processing is done by flail hot plating method) nickel, nickel alloys, chromium, and tantalum alloys with a hardness of 30.
Coated with hard plating of 0111 or higher, and then ion plated on top! According to the law, 17 nitriding sessions are held.t4
Ill method for external parts of wristwatches as I images.