JPS61147833A - Spectacle frame - Google Patents

Abstract

PURPOSE:To obtain spectacle frames having satisfactory machinability and corrosion resistance by incorporating a specified percentage of one or more among Pb, Te, S, Se, Bi, Ca and Ag into an Ni-Cu alloy. CONSTITUTION:An alloy having superior machinability and corrosion resistance and suitable for use as a material for spectacle frames is obtd. by incorporating 0.05-5wt% one or more among Pb, Te, S, Se, Bi, Ca and Ag into an Ni-Cu alloy. The hot workability can be improved by further incorporating at least one among 0.01-4wt% Ti, 0.001-0.5wt% C and 0.001-0.5wt% Mg.

Description

[Detailed description of the invention] (Technical field of invention) The present invention relates to an eyeglass frame with good free-cutting properties and corrosion resistance.

(Technical background of the invention and its problems) As shown in the drawing, the glasses frame is a temple ■.

Eye rim■, mountain■, box■, foot■, rimrock■,
It consists of various parts such as a hinge ■, a crossing ■, a decoration ■, and a screw ■.

Various materials such as plastics and metals are used for these eyeglass parts. In particular, metal glasses are valued for their smart design and excellent functionality.

The metal materials that make up eyeglass parts include nickel silver, stainless steel,
Aluminum, brass, phosphor bronze, nickel-chromium alloys, etc. are used. Among these, nickel-copper alloy is an extremely preferable material because it has excellent luster, corrosion resistance, and workability.

However, nickel-copper alloys do not necessarily have sufficient machinability for eyeglasses.

Therefore, there is a need for a nickel-copper alloy that has both corrosion resistance and free machinability. However, if you try to improve the free machinability, the corrosion resistance will decrease, and on the other hand, if you try to improve the corrosion resistance, the free machinability will decrease. It has not been possible to obtain a nickel-copper alloy for eyeglasses that satisfies the characteristics described above, and therefore, it has also not been possible to obtain such an eyeglass frame.

(Object of the Invention) The first object of the present invention is to provide an eyeglass frame made of a nickel-copper alloy that has good free machinability and good corrosion resistance. An object of the present invention is to provide an eyeglass frame made of a nickel-copper alloy having good machinability, hot workability, and corrosion resistance.

(Summary of the invention) In order to achieve the first object, the present invention uses Pb.

1 selected from re, s, se, st, ca and Ag
To provide a lens frame made of a nickel-copper alloy containing a species or two or more elements in an amount of 0.005 to 5% by weight. That is,
Pb, Te, S.

3e, Bi, Ca and AIJ elements are Cu
- Exists in the Ni alloy as a low-melting-point metallic inclusion or non-metallic inclusion, improves the lubrication effect without significantly reducing corrosion resistance, and improves the effect of removing burrs formed on the cutting edge of a cutting tool.

However, if there is too much of this type of element, hot workability and free machinability will be reduced, while if there is too little, the effect will be small. Therefore, the content of the layer is preferably 0.001 to 5% by weight, more preferably 0.01 to 2% by weight, and even more preferably 0.1 to 1% by weight.

According to the present invention, an alloy with good corrosion resistance and free machinability can be obtained. However, if an attempt is made to further improve the hot workability, the free machinability and corrosion resistance tend to deteriorate, and the properties of corrosion resistance, free machinability, and workability deteriorate. It has been difficult to obtain an alloy that satisfies both. Therefore, in order to achieve the second objective, the present invention provides Pb, Te,
S.

At least one element selected from Se, 3i, Ca, and 80 is contained in an amount of 0.005 to 5% in Kanayama%, Ti: 0.01 to 4% by weight, and C: 0.005%.
Provided is an eyeglass frame made of nickel copper, characterized in that it contains at least one element selected from 0.5% by weight and Mg: 0.002 to 0.1% by weight.

Here, the addition of Ti, C and Mg is the addition of the above-mentioned additive elements (Pb,
Te, S, 86. Addition of Bi, Ca, and Aa) improves hot workability without reducing machinability.

That is, Ti fixes nitrogen and prevents blowholes from occurring, and C and MQ help prevent crystal grains from increasing in size. However, if there are too many of these additive elements, hot workability will be reduced, while if there are too little, it will be difficult to obtain good hot workability. Therefore, the range of Ti component is 0.01 to 4%
, further O,OS ~2% by weight, furthermore 0.1-1% by weight
is preferable, and the component ranges of C and fvl are both 0.
．． 0.001 to 0.5% by weight, more preferably 0.01 to 0.1% by weight.

On the other hand, the content of the alloy of the present invention is preferably 10 to 90% by weight from the viewpoint of decorativeness and corrosion resistance. In addition to these properties, when considering deformation workability and high corrosion resistance, the Cu content is preferably 10 to 30%, while when considering seawater resistance and high temperature strength, it is preferably 60 to 75%. As described above, there are more preferable component ranges depending on the required characteristics. The alloy of the present invention described above is effective for eyeglass parts that particularly require machinability, and is suitable for, for example, hinges. In terms of free-cutting properties for this hinge, it is desirable that the depth is 2.5 mm or more, more preferably 3 mm or more, which can be drilled in 30 seconds using a 3III diameter straight drill with a load of 13 kg.
The alloy of the present invention satisfies this required property.

(Embodiments of the invention) Examples of the invention will be described. Hot workability when manufacturing eyeglass frames using the alloys shown in Table 1.

In addition to the free machinability, the corrosion resistance of the product was also measured. As a measurement method, machinability is measured by drilling a hole using a straight drill with a diameter of 3 mm+ under a load of 13 kg for 30 seconds, and measuring the depth. Sodium 0.03%, sugar 0.02%
, ammonia water 0.02%, milk @ 0.1%, and remaining water were immersed in artificial sweat for 10 minutes and dried repeatedly for 10 minutes to measure the occurrence of corrosion. Hot workability was determined at a temperature of 70
It was measured visually under the conditions of 0 to 1100°C and a rolling reduction of 50%.

The evaluation here was as follows.

X...Completely broken Δ...Cracked O...The yield was sufficient for practical use◎...The workability was Good: 0: Workability was extremely good:
As is clear from Table 1, the eyeglass frames of the examples of the present invention have better corrosion resistance and machinability than the comparative examples.

Furthermore, the spectacle frame of the present invention has good brazing properties and workability due to the addition of T'i and the like, and is particularly suitable for the hinges, rim locks, eye rims, temples, frames, and bridges of spectacle parts, in that order.

(Effects of the Invention) As explained above, the present invention provides a nickel steel alloy with Pb and
By using an alloy containing 0.005 to 5% by weight of one or more elements selected from Te, S, Se, Bi, Ca, and IJ, it has good free machinability and It is possible to provide an eyeglass frame with good corrosion resistance, and furthermore, it contains Ti:
0.01-4% by weight, C: 0.001-0.5
By using an alloy containing at least one element selected from weight% and Mg: 0.001 to 0.5% by weight, an eyeglass frame with good corrosion resistance, free machinability, and hot workability is provided. can.

[Brief explanation of the drawing]

The drawing is a perspective view showing an example of the eyeglasses of the present invention. 1... Temple 2... Eye rim 3... Yama 4... Box 5... Legs
6...Rim lock 7...Hinge 8...
Watari 9... Decoration 10... Screw (731
7) Agent: Patent attorney Kensuke Chika (and 1 other person)

Claims (2)

[Claims] (1) 0.00% by weight of one or more elements selected from Pb, Te, S, Se, Bi, Ca, and Ag
An eyeglass frame made of a nickel-copper alloy containing 5 to 5%. (2) 0.005 to 5% by weight of one or more elements selected from Pb, Te, S, Bi, Ca, and Ag;
%, Ti: 0.01 to 4% by weight, C: 0.
An eyeglass frame made of a nickel-copper alloy containing at least one selected from 0.001 to 0.5% by weight and Mg: 0.001 to 0.5% by weight.