JPS6239231A - 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 eyeglass frames. Materials for decorative items such as hairpins, tie clips, and hairpins are required to have excellent brazing properties as well as spring properties.

However, because the conventional composite material 1 for decorative items shown in FIG. The outer metal 3 of 6% by weight is clad with 20 alloy, and when this is processed into a rim wire 4 for eyeglass frames and brazed as shown in FIG.
Because it is exposed to high temperatures of ~900°C, A and u in the outer sheath metal 3 on the brazed part 5 side form a very brittle intermetallic compound 6 with Ti.
will be formed. As a result, the intermetallic compound 6 causes the outer sheath metal 3 and the core material 2 to separate, making it unusable.

Further, in the composite material 1 for decorative articles, the 20 alloy in the outer sheath metal 30 has poor spring properties, and the Ti which 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 items of the present invention has Ti or a Ti alloy as a core material, and a Ni alloy containing 5 to 60% by weight of Cu as an intermediate material, with Zr, Nb, and V alone or in an alloy interposed therebetween. It is characterized in that it is clad with a noble metal alloy as the outer covering metal.

The method for producing a composite material for decorative articles of the present invention includes Ti or T
After applying Au plating, Ag plating or Ni plating to the outer peripheral surface of the i alloy wire, the outer peripheral surface and inner peripheral surface of the Ni alloy pipe, and the inner peripheral surface of the noble metal alloy pipe, Zr, Nb, ■N alone or with an alloy interposed
It is characterized by sequentially fitting an i-alloy pipe and a precious metal alloy pipe, and then performing plastic working such as extrusion or drawing to form a cladding.

In the composite material for ornaments having the above structure, during heating during soldering, the intermediate N1-Cu alloy and the core Ti or Ti alloy diffuse into each other, resulting in the Ni-Cu-Ti ternary element. A eutectic is formed, but since this eutectic structure is ductile, it does not form a brittle layer and can prevent separation from the interface. Furthermore, the Ni-Cu alloy used as the intermediate material has high spring properties and is therefore ideal as a decorative material that requires 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 thickness of the core material, intermediate material, and outer covering metal is preferably 10 to 50:3 to 20:1 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 Z r s N b, (■) is interposed between the core material and the intermediate material, excessive diffusion during track processing is largely suppressed, and the core The bonding strength between the material and the intermediate material is high, which is more preferable. 1, t Furthermore, 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 pipe, and the inner peripheral surface of noble metal alloy pipe is to prevent oxidation during the manufacturing process. , while the process is simplified.

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

The decorative composite material 1o shown in Figure 1 has a diameter of 2.32 m.
5 as the core material 11, and a 3μ thick Nb layer 14 on this.
is interposed and a 35% by weight Ni-Cu alloy with a thickness of 0.34 mm is clad as the intermediate material 12, and
34 dragon, outer diameter 3.07mm, 20 alloy is outer sheath metal 13
The thickness ratio is 34:0.1:
The ratio is 10:1. To manufacture this, the outer peripheral surface of the wire rod with a diameter of 37.8++n was plated with 5 μm of Ag.
Au plating is applied to 2μ, inner diameter is 37.9 fins, outer diameter is 49.0 fins, Ni-Cu35 heavy weight pipe has 10μ Ni plating on the outer and inner peripheral surfaces, inner diameter is 49.1 mm, outer diameter is 50
．． It has the excellent effect of allowing 5 μm of Ni plating to be applied to the inner peripheral surface of a 20 alloy pipe in just one piece.

[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 Zr and Nb are added to this core material.
A composite material for ornaments, characterized in that 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. 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 a composite for ornaments, which is characterized by sequentially fitting a Ni alloy pipe and a precious metal alloy pipe to a Ti alloy material with Zr, Nb, and V alone or alloy interposed therebetween, and then performing plastic working to form a cladding. How the material is manufactured.