JPS61228946A - Composite blank for ornament - 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 improvements in composite materials for eyeglass frames, watch sides, watch bands, necklaces, etc. Specifically, the present invention relates to improvements in composite materials for eyeglass frames, watch sides, watch bands, necklaces, etc. Concerning composite materials for decorative items with excellent brazing properties.

(Prior Art and its Problems) Recently, there has been a demand for lightweight ornaments among various ornaments in order to enhance activity.

As a material for decorative items that meets these demands,
Recently Ti or Ti alloys have been used.

However, Ti or Ti alloys have poor brazing properties and must be brazed in a high vacuum or in a special atmosphere in order to have strong strength, and improvements in this respect have been desired. .

As one means for this purpose, as shown in FIG. 3, a core material 1 is made of Ti or a Ti alloy, and a material 2 having good corrosion resistance and brazing properties, such as a Ni alloy, an Au alloy, etc.
A method of cladding with platinum group alloy, stainless steel, etc. has been adopted.

However, although this method has the advantage of preventing the oxidation or nitridation of the Ti or Ti alloy core material 1 and allowing easy brazing in the atmosphere, the decorative composite material 3 is rolled and made into a sheet material. 4 and this plate material 4 as shown in Fig. 4.
600 to 90 using a brazing material 5 such as Ag wax or Au wax
．． When brazing in the atmosphere at 0℃, the core material 1 and the outer material 2
Since a very brittle intermetallic compound 6 such as Ti--Ni5 Tl--Au is formed at the interface with the metal, there is a fatal drawback that the intermetallic compound 6 peels off from the layer after brazing.

(Object of the Invention) The present invention was made in order to eliminate such drawbacks, and provides a decorative product that can be brazed in the atmosphere, has extremely high brazing strength, and does not peel off from the upper and outer materials. The aim is to provide composite materials for use in

(Structure of the Invention) As shown in FIG. 1, the composite material for decorative articles of the present invention consists of Ti or Ti alloy l plated with Ag or Sn, and on the outside thereof 5 to 50% by weight of Cu and Sn0. .01~10
% by weight of Ag alloy is clad as the intermediate layer 7,
The outer side of the intermediate layer 7 is clad with a material 2 having good corrosion resistance and excellent brazing properties, such as a Ni alloy, an Au alloy, a platinum group alloy, or stainless steel.

The reason why an Ag alloy was used as the intermediate layer here is that Ag relieves thermal strain during brazing.

Furthermore, Cu is added to Ti or corrosion-resistant material and Cu.
This is because Cu-Ti is not brittle and peeling after brazing can be prevented.

The Cu content is limited to 2.5 to 50% by weight, which is 2.5% by weight.
If it is less than 50% by weight, it is not sufficient for Cu to bond preferentially to form a Cu-Ti layer, and if it exceeds 50% by weight, the Ag layer as a thermal relaxation material will decrease and peeling will occur due to thermal strain.

The reason why Sn is further added is to prevent abnormal growth of the Cu-'["i layer and prevent peeling if the brazing temperature is raised too high. This is because Ti and Sn
binds preferentially to form a solid solution of 5n-Ti,
This is because this alloy is not brittle even when it grows. The reason why the amount of Sn is limited to 0.01 to 10% by weight is that if it is less than o or oi% by weight, there is no effect, and if it exceeds 10% by weight, it becomes difficult to process.

Furthermore, the reason for using Ti or Ti alloy plated with Ag or Sn is to prevent oxidation of Ti during the manufacturing process of the composite material and to obtain a composite material with high bonding strength.

Next, in order to clarify the effects of the composite material for decorative articles of the present invention, specific examples and conventional examples will be described.

(Example 1) A Ti bar with a diameter of 471 Ill was coated with 5 μm of Sn plating, covered with a λg-CulO wt%-5n2 wt.
Covering with a CrlO% alloy pipe and extruding or drawing, as shown in Fig. 1, Ti is made into a core material 1 with a diameter of 3IIIm.
Ag-Cu- with a thickness of 0.017 mm is placed on the outside of this.
A 3n alloy is clad as the intermediate layer 7, and a 0.25 mm thick Ni-Cr alloy 2 is clad on the outside of the intermediate layer 7 to form a composite material 3' for ornaments, which is rolled to form a 0.25 mm thick Ni-Cr alloy 2.
A plate material 4' with a thickness of 75 mm is made, and this plate material 4' is 83 mm thick using a brazing material 5 containing 28% by weight of Ag-Cu as shown in FIG.
A test piece was obtained by brazing in the atmosphere at 0°C.

(Example 2) A Ti-A13 72% by weight alloy rod with a diameter of 41 mm was plated with 5μ of Ag, and this was coated with 5% by weight of Ag-Cu.
-S n 1.5% by weight alloy is covered, and Au-A is placed on top of it.
As shown in Figure 1, the Ti alloy is coated with a 25% g25%-Cu25% alloy and extruded or drawn to form a Ti alloy with a diameter of 3%.
A core material 1 with a thickness of 1 mm is used, an Ag-Cu-3n alloy is clad on the outside as an intermediate layer 7, and an Au-Ag-Cu alloy 2 with a thickness of 0.25 mm is clad on the outside of this intermediate layer 7 for decoration. Composite material for products 3' is made and rolled to 0.75
A plate material 4' with a thickness of mn+ is made, and this plate material 4' is 830 mm thick using a brazing material 5 of Ag-Cu2O weight% as shown in Fig. 2.
A test piece was obtained by brazing in the atmosphere at ℃.

(Conventional Example) A Ni-CrlO wt% alloy was covered with a Ti bar having a diameter of 49 mm, and by extrusion, drawing, etc., as shown in Fig. 3,
A Ti core material 1 with a diameter of 3 mm is used, and a thickness of 0.0 mm is placed on the outside of this core material 1.
A 25 m long Ni-Cr alloy 2 is clad to form a composite material 3 for decorative items, and this is rolled to form a plate material 4 with a thickness of 0.75 mm.
This plate material 4 is made of <Ag-Cu28> as shown in Fig. 4.
A test piece was obtained by brazing at 830° C. in the atmosphere using a brazing filler metal of 5% by weight.

However, when the test pieces of Example 1.2 and the conventional example were subjected to a tensile test, the results shown in the table below were obtained. Pillar phase valve *Number of test pieces: 5 As is clear from the table above, the test piece of Example 1.2 has significantly higher breaking strength and bonding strength than the conventional test piece. In addition, in the test piece of the conventional example, the joint surface between the core material 1 and the outer material 2 was a fracture surface, whereas in the test piece of the example, the base material was a fracture surface, and the joint surface between the core material 1 and the outer material 2 was a fracture surface. It can be seen that the bonding strength is high.

(Effects of the Invention) As detailed above, the composite material for ornaments of the present invention can be brazed in the atmosphere, has excellent brazing workability, has extremely high brazing strength, and is made of Ti or Ti alloy. Since the material and the outer corrosion-resistant material do not peel off, it has excellent durability and functionality, and can be said to be an epoch-making composite material for lightweight decorative items.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the composite material for decorative articles of the present invention, Fig. 2 is a cross-sectional view of a test piece obtained by brazing plates obtained by rolling the composite material, and Fig. 3 is a cross-sectional view of a conventional decorative material. FIG. 4 is a sectional view of a test piece obtained by brazing a plate obtained by rolling the composite material. Applicant Tanaka Kikinzoku Kogyo Co., Ltd. Figure 1 Figure 3 Figure 2 Figure 4

Claims (1)

[Claims] 2.5-50% by weight of Cu and 0.01-10% by weight of Sn on Ti or Ti alloy plated with Ag or Sn
A composite material for decorative items, characterized in that the intermediate layer is clad with an Ag alloy containing , and the outer layer is clad with a corrosion-resistant material.