JPS6135417A - Composite wire - Google Patents

Abstract

PURPOSE:To prevent the hardening and embrittlement of the joint boundary part between a core metal and a sheath metal which is karat gold, to improve joint strength and to prevent exfoliation by disposing an intermediate layer consisting of Ag or Cu or Ag-Pd alloy between the core material and the sheath metal and joining the core material and the sheath metal. CONSTITUTION:The intermediate layer 4 consisting of Ag or Cu or Ag-Pd 30% alloy is provided between the core material 1 consisting of Ti and the sheath metal 2 consisting of the Au metal. These materials are integrally joined to form a composite wire 3'. The wire 3 having such construction is drawn and is then swaged and pressed, by which a temple 6, etc. of spectacles are manufactured. The hardening and embrittlement of the joint boundary part between the core material and the sheath metal as a result of brazing of the members are thus prevented and the joint strength is improved, by which the exfoliation of the sheath metal is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a composite wire for eyeglasses, watch bands, etc.

(Prior art and its problems) Conventionally, as shown in Fig. 4, a composite wire for glasses 3, watch bands, etc. was used (core material 1 made of Ti or Ti alloy, and Karasoto gold, which is an Au alloy, used as outer metal 2). A composite wire 3 formed by joining is used.

However, when parts made of the same type of material or other types of materials are brazed to this composite wire 3, a complex intermetallic compound of Tir A u + Cu is generated between the core material 1 and the outer sheath metal 2. There was a drawback that the bonding boundary between the core material 1 and the outer sheath metal 2 hardened and became brittle, resulting in a decrease in bonding strength and peeling.

(Object of the Invention) The present invention has been made in order to eliminate such drawbacks, and involves hardening of the joint boundary between the core material of Ti or Ti alloy and the outer sheath metal of Karasoto gold by brazing the members.

The object of the present invention is to provide a composite wire that can prevent embrittlement, increase bonding strength, and prevent peeling.

(Structure of the Invention) In the composite wire of the present invention, in which Ti or a Ti alloy is used as a core material and a gold alloy is used as an outer covering metal, an intermetallic compound or the like is present between the core material and the outer covering metal. Ag or C that does not create a brittle layer
It is characterized in that an intermediate layer of U or Ag-Pd alloy is arranged and bonded.

(Embodiments and Conventional Examples) Below, an embodiment of the composite wire of the present invention will be explained with reference to FIG.
For example, 18K outer covering metal, 4 is Ag or Cu or A
An intermediate layer of g-Pd 30% alloy is joined together to form a composite wire 3'.

The composite wire 3' having such a structure is drawn, then swaged, and then press-formed to form the temples 6 of the glasses as shown in FIG. 2, and the hinges 8. After high-frequency leakage brazing and resistance brazing are applied to the broaches 9 using BAg-1 brazing filler metal, the hinges 8. When the brooch 9 was subjected to a peel test, the hinge 8 and the brooch 9 were deformed, but the temple 6
The outer sheath metal 2 at the joint portion of the hinge 8 and the broach 9 did not peel off at all.

Further, the composite wire 3' of the present invention is processed into a deformed wire 7 as shown in FIG. 10, the box leg material 10 was deformed, but the deformed wire 7
The outer sheath metal 2 of the joined portion of the box leg material 10 did not peel off at all.

However, as shown in FIG. 4, a conventional composite wire 3 made by bonding 18-karat gold to a Ti core material 1 as an outer sheath metal 2 is processed in the same manner as described above to make the temples 6 and irregularly shaped wires 7 of the glasses. After brazing the hinge 8, broach 9 and box leg material 10 to these in the same manner as above, a peel test was performed on them.
As shown in FIGS. 5 and 6, the hinge 8. The broach 9 and the box leg material 10 were separated from the core material 1 together with the outer sheath metal 2 of the temple 6 and the deformed wire 7, and the outer sheath metal 2 had an impractical bonding strength.

(Effect of the invention) As can be seen from the above explanation, the composite wire of the present invention is made of Ti or T.
An intermediate layer of Ti, Ag, Cu, or Ag-Pd alloy that does not form an embrittlement layer is placed between the core material of i-alloy and the outer sheath metal of Karasoto gold. By brazing the members, the bonding boundary between the core material and the outer sheath metal is prevented from becoming hardened and brittle, and the bonding strength is increased to prevent peeling of the outer sheath metal, which is an excellent effect.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the composite wire according to the present invention, Fig. 2 is a perspective view showing a state in which a hinge and a brooch are brazed to the temples of glasses made from the composite wire according to the present invention, and Fig. 3 is a cross-sectional view of the composite wire according to the present invention. A perspective view showing a state in which a box foot material is brazed to a deformed wire made from a composite wire, Figure 4 is a cross-sectional view of a conventional composite wire, and Figure 5 is a diagram showing a temple of glasses made from a conventional composite wire. A perspective view showing the results of a peel test after the hinge and broach were brazed. Figure 6 shows the results of a peel test after the box foot material was brazed to a deformed wire made from conventional composite wire. FIG. Applicant Tanaka Kikinzoku Kogyo Co., Ltd. Figure 1 6: Te〉Fukore

Claims (1)

[Claims] In composite wires with Ti or Ti alloy as the core material and gold alloy as the sheath metal, Ag or C is used between the core material and the sheath metal.
A composite wire characterized in that an intermediate layer of U or Ag-Pd alloy is disposed and bonded.