JPS6239232A - Composite blank for decorating and manufacture thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to composite materials for decorative items, particularly decorative materials such as eyeglass frames, tie pins, and watch bands that are lightweight, have spring properties, and have excellent brazing properties. Concerning composite materials for products and their manufacturing methods.

(Prior Art and its Problems) Recently, there has been a demand for materials for decorative articles that are lightweight and have excellent spring characteristics in order to increase activity and enhance the sense of decoration in various decorative articles.

On the other hand, precious metals used as materials for decorative items have poor spring properties.
It was also disadvantageous in terms of weight reduction.

Therefore, research and development was carried out to compensate for these shortcomings, and Ti
Alternatively, the application of composite materials made of Ti alloys clad with precious metals to decorative items is being considered.

By the way, decorative items are often made into final products by assembling complex-shaped parts and then brazing them (therefore, it is essential that materials for decorative items have excellent brazing properties, especially for eyeglasses. Materials for decorative items such as frames, tie pins, and hair bottles are required to have excellent brazing properties as well as spring properties.

However, since the conventional composite material 1 for decorative items shown in FIG. 3 is lightweight, it is directly coated with gold such as Au83.4% and Ag8.0% on the outer periphery of the Ti or Ti alloy core material 2.
%, Cu 3.5% by weight is clad with a 20 alloy outer sheath metal 3. When this is processed into a rim wire 4 for eyeglass frames and brazed as shown in Fig. 4, the brazing time is 60%.
Since it is exposed to a high temperature of 0 to 900'C, Au in the sheath metal 3 forms a very brittle intermetallic compound 6 with Ti on the brazed portion 5 side. As a result, this intermetallic compound 6
As a result, the outer sheath metal 3 and the core material 2 separate, rendering the product unusable.

Further, in the composite material 1 for decorative articles, the 20 alloy of the outer sheath metal 3 has poor spring properties, and the Ti that is the core material 2 also has poor spring properties. In order to improve the spring characteristics of Tt, various Ti alloys made by adding various metals have been developed, but these lack the workability required for materials for decorative items.

(Object of the Invention) The present invention has been made to solve the above-mentioned problems, and provides a composite material for decorative items that is lightweight, has excellent brazing properties, and has good workability and spring properties, and a method for manufacturing the same. The purpose is to

(Structure of the Invention) The composite material for decorative articles of the present invention has T1 or T1 alloy as a core material, and Pt, Ir, Os, Ru, Rh, Pd alone or in an alloy thereof is interposed therein to have a Cu content of 5 to 60% by weight. N including
It is characterized in that the i-alloy is clad as an intermediate material, and the noble metal alloy is further clad as an outer covering metal.

The method for manufacturing a composite material for decorative items of the present invention includes applying Au plating, A
After g plating or Ni plating, a Nt alloy pipe and a noble metal alloy pipe are sequentially fitted onto the Ti or Ti alloy wire with Pt, Ir, Os, Ru, Rh, Pd alone or alloy interposed therebetween, It is characterized in that it is then subjected to plastic working such as extrusion or drawing to form a cladding.

The composite material for ornaments having the above structure is made of Ni-Cu-Ti ternary material because the Ni-Cu alloy of the intermediate material and the Ti of the core material or Ti of the Ti alloy diffuse into each other during the heating step 2 during brazing. However, since this eutectic structure is ductile, it does not form a brittle layer and prevents peeling from the interface. Also, the intermediate material N
Since the i-Cu alloy has high spring properties, it is ideal as a material for decorative items that require spring properties.

The Cu content of the intermediate Ni-Cu alloy is 5 to 60% by weight.
The reason for this limitation is that if it is less than 5% by weight, the spring properties will be insufficient, and if it exceeds 60% by weight, no eutectic structure will be formed and embrittlement will occur.

The thicknesses of the core material, intermediate material, and sheath metal are preferably 10 to 5:1; 3 to 2:1 in order to maintain springiness and lightness.

In addition, in the decorative composite material having the above structure, if a single substance or an alloy of Pt, Ir, 05% Ru, Rh, or Pd is interposed between the core material and the intermediate material, excessive diffusion during heat treatment can be suppressed. , the bonding strength between the core material and the intermediate material is high, which is more preferable.

Further, in the above method for manufacturing a composite material for decorative articles, T
The reason for applying Au plating, Ag plating, or Ni plating to the outer peripheral surface of i or Ti alloy wire, the outer peripheral surface and inner peripheral surface of Ni alloy vibrator, and the inner peripheral surface of noble metal alloy pipe is to prevent oxidation during the manufacturing process. This is because the process is simplified.

(Example) A specific embodiment of the present invention will be described together with a conventional example.

The composite material 1o for ornaments shown in FIG. 1 has a core material 11 made of Ti having a diameter of 2.32mm, a PT layer 14 having a thickness of 3μ interposed therebetween, and a Ni-Cu35ff material having a thickness of 0.34mm.
l weight% alloy is clad as the intermediate material 12, and further has a thickness of 0.034 am and an outer diameter of 3.07 mm (7) K20
The alloy is clad as the outer covering metal 13, and the thickness ratio thereof is 34:0.1:10:1.

This was manufactured by applying 5μ of Ag plating and 2μ of Au plating to the outer peripheral surface of a wire rod with a diameter of 37.8mm, and an inner diameter of 37.9mm.
10 μm of Ni plating is applied to the outer and inner circumferential surfaces of a Ni-Cu 35% by weight alloy pipe with an outer diameter of 49.0 mm, and an inner diameter of 4
It has the excellent effect of being able to apply Ni plating to 5μ on the inner circumferential surface of a 20 alloy pipe of 9.1mm, outer diameter 5o, and 1mm.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the composite material for ornaments of the present invention, and Fig. 2 shows a state in which the composite material for ornaments shown in Fig. 1 has been processed into a rim wire for eyeglass frames and brazed. FIG. 3 is a cross-sectional view showing a conventional composite material for decorative items.
FIG. 4 is a sectional view showing a state in which the composite material for ornaments shown in FIG. 3 is processed into a rim wire for an eyeglass frame and brazed. Applicant Tanaka Kikinzoku Kogyo Co., Ltd. Figure 1

Claims (1)

[Claims] 1) Ti or Ti alloy is used as a core material, and Pt, Ir
, Os, Ru, Rh, Pd alone or in an alloy, a Ni alloy containing 5 to 60% by weight of Cu is clad as an intermediate material, and a noble metal alloy is further clad as an outer covering metal. Composite material for goods. 2) Au on the outer circumferential surface of Ti or Ti alloy material, the outer circumferential surface and inner circumferential surface of Ni alloy pipe, and the inner circumferential surface of noble metal alloy pipe.
After plating, Ag plating or Ni plating, Ti
Or Pt, Ir, Os, Ru, Rh, Pd in Ti alloy material
1. A method for manufacturing a composite material for ornaments, which comprises sequentially fitting a Ni alloy pipe and a precious metal alloy pipe with a single element or an alloy interposed therebetween, and then performing plastic working to form a cladding.