JPH0345703B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The disclosed technology belongs to the technical field of the structure of metalwork decorative materials such as watch bands and eyeglass frames.

<Summary of the Summary> The invention of this application is a base material used for decorative metal materials such as watch bands and eyeglass frames, and is a material that uses Ni metal or Ni metal to reduce weight.
This invention relates to a Ti core wire that is integrally bonded with an intermediate material such as Pd metal and a surface layer material, and in particular, the invention relates to a Ti core wire that is integrally bonded with an intermediate material such as Pd metal and a surface layer material, and in particular, the addition of the material on at least a part of the entire surface of a Ti metal base material or the entire surface. Labyrinth-like engagement grooves are bored in the surface at a predetermined pitch in the circumferential direction, and the surface material forms protrusions corresponding to the engagement grooves on the inner surface, or
Alternatively, the Ti metal base material is mechanically and
are metallically connected to strengthen the bonded state, and are further bonded via a metal plating layer such as Ag between the engaging groove and the surface material or groove material,
Alternatively, the invention relates to a Ti core wire material in which the surface of the surface layer material is clad with a noble metal alloy such as gold or plated with metal.

<Prior art> As is well known, decorative functions are now required for watch bands, eyeglass frames, etc., and in response to this demand, efforts have been made to improve their design, and core wire materials made of metal materials that can meet these demands have been developed. It is starting to be used.

In addition, general industrial materials that require weight reduction, especially
For materials that require brazing, Ti metals such as Ti and its alloys are widely used, and in a specific embodiment, they are used as cladding materials in which a surface material is bonded to a base material with high strength. This is a well-known technique as disclosed in, for example, the invention disclosed in Japanese Utility Model Application Publication No. 56-50629 and the invention disclosed in Japanese Patent Application Publication No. 57-91891.

In other words, the specific gravity of Ti is the same as that of conventional nickel silver of this type of metal.
It is extremely lightweight, about half the weight of Monel or Ni-based alloys, and is particularly easy to wear when carried on the body, such as in eyeglass frames or watch bands, and has good fit. Moreover, it is strong enough to withstand practical use, and on the other hand, it is widely adopted to meet the needs of various fields such as automobile parts and electrical materials due to its light weight and excellent strength. There is.

<Problem to be solved by the invention> Therefore, in the Ti core wire of the conventional embodiment,
Basically, a method of integrally bonding a surface layer material such as Ni to a Ti base material by simply cladding is adopted as a general technology, so as shown in Fig. 1, lightweight Ti metal material 1 uses Ti. Peeling phenomenon often occurs at the interface 4 between the base material 2 and the surface layer material 3, and as a result, it is not cost-effective in terms of yield, etc., and cannot withstand daily use, making it unsuitable for practical use. There was a problem.

The same was true for the core wire.

However, since Ti metal is inherently an active metal, metallurgical reactions with other metals are extremely pronounced, and in some cases, eutectic reactions may cause poor malleability and brittle intermetallic compounds. This is because it is difficult to obtain high strength due to the formation of the layer at the bonding boundary, and there is a possibility that such problems are likely to occur particularly when exposed to high temperatures during brazing.

For this reason, in industries that use decorative metals such as crafts, small lightweight precision machines, and electronic parts, even if core wires made of Ti metal are used, the inherent merits of Ti metal cannot be fully utilized. The disadvantage was that it would not be used reliably.

In addition, it is possible to adopt a technique in which a predetermined intermediate layer is interposed between a Ti metal base material and a surface layer material is clad on the outside, but there are limits to the combinations of these metals. In addition to the disadvantage of having little flexibility, it also had the disadvantage of being expensive and unprofitable.

<Object of the invention> The object of the invention of this application is based on the above-mentioned prior art.
To reduce the inherent lightness of Ti metal when attaching and integrally bonding the surface layer material to the Ti metal base material of the Ti metal core wire directly or via an intermediate layer.
We consider the problems of Ti-core wire as a technical issue to be solved,
Although it is simple, it has a rational design that increases the bonding strength of the surface layer material to the Ti metal base material, fully demonstrates the inherent lightness of Ti metal, and also ensures practical use in mass production. We aim to provide an excellent Ti-core wire material that can be used in the field of composite layer metal processing technology in the metal product manufacturing industry by making it possible to do so without impeding its workability in any way and enhancing the design of the final product. That is.

<Means and effects for solving the problem> In accordance with the above-mentioned object, the structure of the invention of this application, which is summarized in the above-mentioned claims, is to solve the above-mentioned problem by using a Ti metal base of Ti or a Ti alloy. A plurality of engagement grooves such as a predetermined tight labyrinth shape are bored in the circumferential direction of the entire surface of the material to a predetermined size, and on the other hand, in the surface material with a closed cross section, the engagement grooves are formed inside the surface material. Either a corresponding engagement protrusion is formed in advance and the engagement groove and the protrusion are coupled together to attach them together, or a predetermined groove material is attached to the engagement groove without forming the protrusion. The surface material is fastened to the engagement groove and the surface material is integrally attached thereto, or the protrusion is directly attached to the surface material after the metal plating layer is interposed in the engagement groove, or , after integrally bonding the surface layer material to the Ti metal base material in this way by bonding via the groove material, cladding the outer surface of the surface layer material with a noble metal alloy, or Technical measures such as precious metal plating were taken.

<Example> Next, an example of the invention of this application will be described below based on the drawings from FIG. 2 onwards.

First, as a basic embodiment, an engagement groove 5 having a predetermined cross-sectional shape such as a square notch type, a round type, an underhang type, etc. is formed on the surface material attachment surface of the Ti metal base material 2', as shown in FIGS. 2, 3, and 4. , 5', 5'' are bored through a predetermined appropriate processing means such as extrusion, rolling, cutting, electrical discharge machining, etc.

The shape, size pitch, etc. of the engaging grooves 5, 5', 5'' are appropriately formed according to the design.

Then, the surface of the Ti metal base material 2' to which the surface layer material is applied is immersed in an aqueous solution containing fluoride as a main component for a predetermined period of time to dissolve and remove the oxide film covering the surface in order to maintain the surface active state.

Depending on the design, Ag, Ni,
A thin metal plating layer is formed to a predetermined thickness by immersing it in a plating solution of Cu, Pd, Cr, Sn, or an alloy thereof for chemical plating, or by applying electricity to perform electroplating.

On the other hand, if a certain metal is used as the surface material,
The protrusions to be engaged with the engagement grooves 5, 5', 5'' of the Ti metal base material 2' are formed by a predetermined processing method such as extrusion, rolling, cutting, electrical discharge machining, etc., and then the surface material is Then, the engagement grooves 5, 5',
5'' and the protrusion, the two are tightly connected.

Then, without processing the shape of the protrusion, the groove material is engaged with the engagement grooves 5, 5', 5'' to attach the surface material, and then the surface material is attached by means of dies, rolling, forging, etc. Make a close connection.

Furthermore, if necessary, it is possible by design to promote tight bonding between the two by performing thermal diffusion treatment at a predetermined temperature between 600°C and 900°C for a predetermined time in an atmosphere such as Ar gas or vacuum. be.

In this case, if the temperature is below 600°C, diffusion will not be sufficient, and if it is above 900°C, the amount of the diffusion layer will increase too much, making processing in subsequent steps undesirable.

The embodiment shown in FIG. 5 is a typical embodiment of the core wire material, in which the Ti metal base material 2' has a circular cross section, and a large number of labyrinth-like engagement grooves are formed at a predetermined pitch on the outer surface of the Ti metal base material 2'. 5, 5... are bored, and on the other hand, protrusions 7, 7... corresponding to the engagement grooves 5, 5... are formed projecting from the inner surface of the surface material 6 having a ring-shaped cross section. Ti core wire rod 8 with which both are bonded together.
The embodiment shown in FIGS. 6 and 7 is a second modified form of the above-mentioned embodiment, and both are design examples depending on the purpose.

In addition, in the embodiment shown in FIG. 8, the engagement grooves 5,
5... is formed by drilling, and then a predetermined metal plating layer 9 is formed.
After forming the surface material 6 having a ring-shaped cross section having protrusions 7, 7 corresponding to the engagement grooves 5, 5, the engagement grooves 5, 5... and the protrusions 7, 7 are tightly engaged with each other. This is an embodiment of a core wire material that is attached integrally through a joint,
Further, the embodiment shown in FIG. 9 is similar to that shown in FIG. 6 above.
This is an embodiment of a wire of a deformed material 81' in which the surface of the surface material 6 of the Ti core wire 81 is further clad with a noble metal alloy 10, and the embodiment shown in FIG. 10 is similar to that shown in FIG. Example Ti metal base material 8
This is an embodiment of a wire rod 81 which is clad by applying a noble metal plating layer 11 to the surface of the surface layer material 6 of 1'.

In addition, in the embodiment shown in FIG. 11, labyrinth-shaped engagement grooves 5, 5, . . . are formed on the Ti metal base material 2', as in the embodiment shown in FIG. No protrusion is formed on the inner surface of 6,
This is an embodiment of a Ti core wire 8'' in which groove members 7', 7'', . . . are made to correspond to the engagement grooves 5, 5, .

In the embodiment shown in FIG. 12, a predetermined metal plating layer 9 is interposed between the engaging grooves 5, 5... and the groove members 7', 7'... and between the surface layer material 6. This is an embodiment of a Ti core wire 8 in which a material 6 is tightly bound.

Therefore, the material of the groove material 7' is the same as that of the surface material 6,
Various materials such as different materials can be used.

Therefore, each of the above-mentioned embodiments is a basic aspect, but
As a specific example, the surface layer material or the groove material is Pd,
There is also an embodiment in which an alloy containing 20% by weight or less of Ni in Pd is used. This is because it lowers the bonding force with the base material and causes peeling of the joint.

It is also possible to provide an alloy containing 20% by weight or less of Pd in Ni, and in this case too, peeling occurs if the content exceeds 20%.

Furthermore, an alloy containing 30% by weight or less of Cu in Ni can be used as the surface layer material or groove material, but in this case, if the content exceeds 30%, it will cause damage at the Ti interface.
This is because Cu and Ni co-diffuse, forming a brittle intermetallic compound of CuTi, resulting in poor malleability.
When a metal plating layer is formed after forming the holes 5' and 5'', plating with at least one of Ag, Ni, Cu, Pd, Cr, and Sn can be performed.

As mentioned above, the surface layer material or the groove material of the Ti core wire material is tightly connected to the Ti metal base material 2' through the engagement grooves 5, 5', 5'' of the base material. outside of
Furthermore, a lightweight Ti metal base material clad with a noble metal alloy can be used as an example, and in this case, the noble metal alloy includes Au, Ag, Pt, Pd, Rh, Ir, and Ru.
An alloy containing at least one kind of noble metal can be used.

Furthermore, as another embodiment, instead of the cladding made of the noble metal material, a Ti core wire material whose surface layer material is plated with a noble metal can be used.

Therefore, the noble metal alloy clad on the outer surface of the surface layer material in the above two embodiments is used as the outer layer material, the surface layer material is used as the intermediate material, and the noble metal plating layer is also used as the outer layer material.

Therefore, the volume ratio of Ti metal in the Ti core wire in each of the above-mentioned examples is set to be 70% or more, but in this case, if it is less than 70%, the weight increases and the initial purpose of the lightweight material is lost. lose.

Furthermore, the total area occupied by the engaging grooves formed on the surface of the Ti metal base material is set to be 90% or less of the surface area of the base material.

This is because if the ratio is 90% or more, the labyrinth shape of the engagement groove of the Ti metal base material cannot provide a sufficient degree of tight bonding to the protrusion of the surface layer material or the groove material.

Next, by complicating the shape of the labyrinth and increasing its area, even when performing secondary processing such as twisting and stretching wire rods, the Ti metal base material and surface layer material can be separated. The degree of tightness can be made sufficient so that mechanical peeling of the material does not occur easily.

It goes without saying that the embodiments of the invention of this application are not limited to the above-mentioned embodiments, and various embodiments can be adopted.

<Effects of the Invention> As described above, according to the invention of this application, since the Ti metal is an activated metal in the Ti core wire material, which is originally extremely excellent in terms of lightness, etc.
When used as a clad material, peeling easily occurs at the clad interface between the base material and the surface layer material, and if it cannot withstand actual use, an engagement groove is formed between the Ti metal base material and its surface layer material. The labyrinth-like engagement between the protrusion and the opposing protrusion creates a mechanically strong engagement state, so there is almost no peeling, and the bonded state is maintained even though it is a core wire material. Not only does it have an excellent effect of being able to be maintained semi-permanently, but as a result, no peeling occurs, so the initial purpose of the material can be achieved. Because the entire surface of the material is coated with leather, it has an excellent effect in terms of design and aesthetics without deteriorating its decorative function. The excellent effect of fulfilling the function of

Therefore, even when brazing is performed to form a clad material, the brazing maintains the initial bonded state, so an excellent effect is achieved in that the bonded state can be reliably maintained.

In this way, it maintains strong bonding properties, making it highly reliable as a material, making it excellent as a material for upholstery and plating, and retaining its original lightweight properties.
The functions of the Ti metal base material can be fully satisfied.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the exfoliation phenomenon of Ti metal clad material based on the prior art, and FIG. 2 and the following are explanatory views of embodiments of the invention of this application.
The figure is a cross-sectional view of the engagement groove formed in the Ti metal base material of the basic embodiment, Figure 5 is a cross-sectional view of the same basic material, and Figures 6 and 7 are
The figure is a sectional view of a basic deformed member, and Figures 8, 9, and 10 are sectional views corresponding to Figures 5, 6, and 7 of other embodiments,
11 and 12 are cross-sectional views of another embodiment. 2'...Ti metal base material, 6...surface layer material, 8,8
1,81',8',8'',8,81'',81...
Ti core wire, 5...engaging groove, 7...protrusion, 7'...
...Groove material, 9...Metal plating layer, 10...Precious metal alloy cladding layer, 11...Precious metal plating.

Claims (1)

[Claims] 1 Ti in which a surface layer material is attached and bonded to a Ti metal base material
In the core wire, the Ti metal base material is formed to have a solid cross section, and a plurality of engagement grooves of a predetermined pitch are bored in the circumferential direction of the attached surface on the entire surface, and the surface layer material of the closed cross section is 1. A Ti core wire material, which is attached to a Ti metal base material by being formed on the inner side and having respective protrusions corresponding to the respective engaging grooves fastened to the engaging grooves. 2. The Ti core wire according to claim 1, wherein the surface layer material is Ni. 3. The Ti core wire according to claim 1, wherein the surface layer material is a Ni-Cr alloy. 4. The Ti core wire according to claim 1, wherein the surface layer material is Pd. 5. The Ti core wire material according to claim 1, wherein the surface layer material is an alloy containing Pd and Ni in an amount of 20% by weight or less. 6. The Ti core wire material according to claim 1, wherein the surface layer material is an alloy containing Ni and Pd in an amount of 20% by weight or less. 7. The Ti core wire material according to claim 1, wherein the surface layer material is an alloy containing Ni and Cu in an amount of 30% by weight or less. 8 Ti with surface layer material attached to Ti metal base material
In the core wire, the Ti metal base material is formed to have a solid cross section, and a plurality of engagement grooves of a predetermined pitch are bored in the circumferential direction of the attached surface on the entire surface thereof, and a groove is formed for each engagement groove. A surface layer material with a closed cross section is formed on the inside thereof through a metal plating layer, and protrusions corresponding to each of the engagement grooves are fastened to the engagement grooves and attached to the Ti metal base material. Ti core wire material. 9 The metal plating layer is Ag, Ni, Cu, Pd, Cr,
The Ti core wire material according to claim 8, characterized in that it is at least one plating layer of Sn. 10 Surface layer material was added and bonded to Ti metal base material.
In the Ti core wire, the Ti metal base material is formed with a solid cross section, and a plurality of engagement grooves of a predetermined pitch are bored in the circumferential direction of the attached surface on the entire surface, and the surface layer material with a closed cross section is formed. A protrusion formed on the inside thereof, corresponding to each of the engagement grooves, is fastened to the engagement groove and attached to the Ti metal base material, and a noble metal alloy is further clad as an exterior material on the outside of the surface layer material. characterized by having
Ti core wire material. 11 The above noble metal alloy is Au, Ag, Pt, Pc, Pd,
11. The Ti core wire according to claim 10, which is an alloy containing at least one noble metal among Rh, Ir, and Ru. 12 A surface layer material was added and bonded to a Ti metal base material.
In the Ti core wire, the Ti metal base material is formed with a solid cross section, and a plurality of engagement grooves of a predetermined pitch are bored in the circumferential direction of the attached surface on the entire surface, and the surface layer material with a closed cross section is formed. The protrusion portions formed on the inside thereof and corresponding to the respective engagement grooves are fastened to the engagement grooves and attached to the Ti metal base material, and furthermore, the surface of the surface layer material is plated with precious metal as an exterior material. Ti characterized by
Core wire material. 13 Surface layer material was added and bonded to Ti metal base material
In the Ti core wire, the Ti metal base material is formed into a solid cross section, and a plurality of engagement grooves of a predetermined pitch are bored in the circumferential direction of the attachment surface on the entire surface, so that the surface layer material is engaged with the Ti metal base material. A Ti core wire material, characterized in that the Ti core wire material is attached to a Ti metal base material through fastening of a groove material to the groove. 14. The Ti core wire according to claim 13, wherein the groove material is made of Ni. 15. The Ti core wire according to claim 13, wherein the groove material is a Ni-Cr alloy. 16. The Ti core wire according to claim 13, wherein the groove material is made of Pd. 17. The Ti-core wire material according to claim 13, wherein the groove material is an alloy containing Pd and Ni in an amount of 20% by weight or less. 18. The Ti-core wire material according to claim 13, wherein the groove material is an alloy containing Ni and Pd in an amount of 20% by weight or less. 19. The Ti core wire material according to claim 13, wherein the groove material is an alloy containing Ni and Cu in an amount of 30% by weight or less. 20 The surface layer material was added and bonded to the Ti metal base material.
In the Ti core wire, the Ti metal base material is formed into a solid cross section, and a plurality of engagement grooves of a predetermined pitch are bored in the circumferential direction of the attached surface on the entire surface thereof, and the engagement grooves are A Ti core wire material characterized in that a surface layer material having a closed cross section is attached to a Ti metal base material through a groove material fastened to the engagement groove with a metal plating layer in between. 21 The metal plating layer is Ag, Ni, Cu, Pd,
Ti according to claim 20, which is a plating layer of at least one of Cr and Sn.
Core wire material. 22 A surface layer material was added and bonded to a Ti metal base material.
In the Ti core wire, the Ti metal base material is formed with a solid cross section, and a plurality of engagement grooves of a predetermined pitch are bored in the circumferential direction of the attached surface on the entire surface, and the surface layer material with a closed cross section is formed. A Ti core wire material attached to a Ti metal base material through a groove material fastened to the engagement groove, and further comprising a noble metal alloy clad as an exterior material on the outside of the surface layer material. 23 The above noble metal alloys include Au, Ag, Pt, Pd, Rh,
Claim 22, characterized in that it is an alloy containing at least one kind of noble metal among Ir and Ru.
Ti core wire material as described in section. 24 Surface layer material was attached and bonded to Ti metal base material.
In the Ti core wire, the Ti metal base material is formed with a solid cross section, and a plurality of engagement grooves of a predetermined pitch are bored in the circumferential direction of the attached surface on the entire surface, and the surface layer material with a closed cross section is formed. It is attached to the Ti metal base material through the groove material fastened to the engagement groove, and further, the surface layer material is plated with precious metal as an exterior material.
Ti core wire material.