JPS6135423A - Composite blank material for spectacle frame - Google Patents

Abstract

PURPOSE:To provide a reduced weight, increased strength and improved brazing characteristic, plating characteristic and workability by providing an intermediate layer if necessary on the outside peripheral surface of an alloy core material formed by dispersing either of B fibers or B fibers coated with SiC at specific volumetric % into a Ti alloy and cladding further an alloy having corrosion resistance on the outside peripheral side thereof. CONSTITUTION:Either of the B fibers or the B fibers coated with SiC are dispersed into the Ti alloy to be used as the core material at 5-40vol% to improve the mechanical strength of the core material and to reduce the weight thereof. An alloy of Cu, Ni, Ag, Au, platinum group or stainless steel having corrosion resistance is clad on the outside peripheral side of the core material. The difficulty of brazing as a result of the high-temp. activity of the Ti component which is the essential component is thereby prevented and the deterioration of the plating characteristic by the secure oxide film coated on the Ti surface is prevented as well. The joint strength between the core material and the sheath metal is further improved if the material consisting of any of Ag, Cu or Ni or the alloy thereof is interposed and joined therebetween as the intermediate layer.

Description

[Detailed description of the invention] -1 (Industrial application field) The present invention relates to improvements in composite materials for eyeglass frames.

(Prior art and its problems) In recent years, there has been a demand for eyeglasses with both lenses and frames that are lightweight and have high strength, in order to expand the range of activities of eyeglass wearers and to improve wearing comfort.

For this reason, the material 1 for eyeglass frames shown in FIG.
This is used as a core material, and in order to improve the plating properties on the outer circumferential side, Cu-based, Ni-based, and A
g-based, Au-based, platinum group-based.

Composite material 3 for eyeglass frames is clad with stainless steel alloy as covering material 2, and furthermore, in order to increase the bonding strength between core material 1 and covering material 2 of composite material 3 for eyeglass frames as shown in FIG. As shown in FIG. 2C, a composite material 5 for eyeglass frames in which materials such as Ag, Cu, Ni, and alloys thereof are bonded with an intermediate layer 4 interposed therein has been developed and put into practical use.

However, with the development of plastic lenses, lighter and stronger materials are required for frames, and the materials shown in FIGS. 2a, b, and c are no longer able to meet these demands.

On the other hand, the specific gravity of AI and A1 alloys is 2.7, and the specific gravity of Ti is 315
However, it has a low melting point of about 650°C, and cannot be used for brazing, which has conventionally been used for eyeglass frames.

(Objective of the Invention) The present invention has been made in view of the above circumstances, and is lightweight and has high strength, and has excellent brazing and plating characteristics.

The purpose of this invention is to provide a composite material for eyeglass frames that has excellent workability.

(Structure of the Invention) One of the composite materials for eyeglass frames of the present invention uses an alloy in which 5 to 40 volume % of either B fibers or SiC-coated B fibers are dispersed in a Ti alloy as a core material. The outer circumferential side is clad with a corrosion-resistant Cu-based, Ni-based, Ag-based, All-platinum group 1 alloy, or stainless steel-based alloy.

In! of the present invention! Another composite material for mirror frames is T.
B with BIJli fiber and SiC coated in i alloy
An alloy in which 5 to 40% of fibers are dispersed by volume is used as a core material, and a material made of Ag, Cu, Ni, or an alloy thereof is clad as an intermediate layer on the outer periphery, and further on the outer periphery. Cu-based, Ni-based, Ag-based, Au-based, and platinum group-based materials that have corrosion resistance.

It is clad with one of the stainless steel alloys.

In the above composite material for eyeglass frames of the present invention, B fibers and SiC are coated in a Ti alloy serving as a core material.
The reason for dispersing 5 to 40% by volume of any of the fibers is to improve the mechanical strength of the core material, and because the specific gravity of B is 2.34 and T
This is because weight reduction can be achieved by controlling the amount of B at about 52% of i; if it is less than 5% by volume, it is not possible to improve the mechanical strength of the core material, and if it exceeds 40% by volume. This is because processing becomes difficult. Especially SiC
By dispersing B fibers coated with Ti, the reaction between Ti and B can be prevented and processability is improved.

Furthermore, in the composite material for eyeglass frames of the present invention, the outer peripheral side of the core material is Cu-based and Ni-based, which have corrosion resistance.

The reason for cladding Ag-based, Au-based, platinum group-based, and stainless steel-based alloys is that Ti, the main component of the core material, is active at high temperatures. This is because it prevents the Ti from becoming difficult to attach, and since the surface of Ti is covered with a strong oxide film, poor plating properties can be improved, and it can be used as a material for eyeglass frames.

Furthermore, in another composite material for eyeglass frames of the present invention, Ag is present between the core material and the outer covering metal.

The reason why a material made of Cu, Ni, or an alloy thereof is interposed and bonded as an intermediate layer is to further improve the bonding strength between the core material and the outer sheath metal, and to obtain a more reliable composite material for eyeglass frames. This is because it is possible.

(Examples) Various examples of the composite material for eyeglass frames of the present invention will be described with reference to the drawings.

Composite material 11 for eyeglass frames shown in FIG. 1a (Example 3)
) is a billet with a diameter of 50 mm and a length of 70 cm, which is made by mixing 30% by volume of short B fibers with a wire diameter of 1 to 10 μm and a length of 20 to 200 μm in Ti powder with a particle size of 5 to 15 μm, and compressing and molding the resulting billet. Sintered at 900℃ for 3 hours in a vacuum of
The outer periphery of this sintered body has a thickness L made of Ni-CrlO%
711 pipe was fitted and hot compressed at 650°C to make a composite billet with a diameter of 35 m and length of 45 mm, followed by hot extrusion at 600°C (extrusion ratio 34) to obtain a diameter of 3 fi. , the thickness of the ridge cover material 8 around the outer periphery of the core material 7 is 17
It is set to 0 μm.

B$Jl in the core material 7 of this composite material 11 for eyeglass frames
The i-fibers 7a are aligned in the longitudinal direction as shown in the figure by hot extrusion of the composite billet.

Composite material 12 for eyeglass frames (Example 4) shown in FIG.
) is a wire coated with 0.5 μm of SiC by sputtering, with a diameter of 1 to 10 μm and a length of 20 to 200 μm.
25% by volume of short B fibers were mixed into Ti powder with a particle size of 5 to 15 μm, and the mixture was compression-molded into a diameter of 50 cranes.

A billet with a length of 100+n was sintered at 1000°C for 2 hours in a vacuum of IQ-'in Hg, and a thin plate of 0.1 mm thick made of 30% by weight of Cu-Ni was placed on the outer surface of this sintered body. A composite billet with a diameter of 35 N and a length of 50 tm was made by fitting a pipe made of 20 gold alloy with a thickness of 0.811 around the outer circumference of the billet at 600°C, and then heating it at 550°C. Perform hot extrusion (extrusion ratio 20) to obtain a diameter of 3 IIm, and form an intermediate layer 10 on the outer periphery of the core material 7.
The thickness of the coating material 8 is 5.5 μm, and the thickness of the covering material 8 is 42 μm. The B fibers 7a in the core material 7 of this composite material 12 for eyeglass frames are aligned in the longitudinal direction as shown in the figure by hot extrusion of the composite billet.

As shown in FIG. 2C, the composite material 11.12 for eyeglass frames of each of these Examples 1.2 and 10% by weight of Ag-Cu was added to the outer periphery of the core material 1 made of pure Ti (2 kinds of Ti) as shown in FIG. 2C.
was clad with a thickness of 5.5 μm as an intermediate layer 4, and further coated with 170 μm of Ni-CrlO as a coating material 2 on the outer peripheral side.
Specific gravity, tensile strength, specific strength (tensile strength/specific gravity) with m-clad, conventional composite material 5 for eyeglass frames with a diameter of 3R
When measured, the results shown in the table below were obtained.

As is clear from the above table, the composite materials for eyeglass frames of Examples 1 and 2 have lower specific gravity and higher tensile strength than the conventional composite materials for eyeglass frames, and therefore have significantly higher specific strength. I understand.

(Effects of the Invention) As detailed above, the composite material for eyeglass frames of the present invention has the following features:
It has a low specific gravity and is lightweight, has a high tensile strength, has an extremely high specific strength, and has excellent brazing properties, plating properties, and workability, so it can be used as a lightweight alternative to conventional composite materials for eyeglass frames. This has the effect that a high-strength eyeglass frame can be easily manufactured, and a eyeglass frame that is comfortable to wear and that makes it easier for the eyeglass wearer to carry out activities can be obtained.

[Brief explanation of the drawing]

FIGS. 1a and 1b are longitudinal cross-sectional views showing an embodiment of the composite material for eyeglass frames of the present invention, and FIGS. C is a cross-sectional view of a conventional composite material for eyeglass frames. Applicant: Tanaka Kikinzoku Kogyo Co., Ltd. Procedural amendment (voluntary) 1985/Mon/7 1, Indication of the case 1982 Patent Office No. 157059 2, Name of the invention Composite material for eyeglass frames 3, Person making the amendment 4. Date of amendment order Voluntary action 5. Subject of amendment Claims column 6 of the specification
, Contents of the amendment As shown in Attachment 2, Claims 1) The core material is an alloy in which 5 to 40% by volume of either B fibers or B fibers coated with SiC are dispersed in Ti or Ti alloy, and the outer periphery thereof Cu type with corrosion resistance on the side, N
A composite material for eyeglass frames made by cladding with an alloy of i-based, Ag-based, Au-based, platinum group-based, or stainless steel-based. 2) An alloy in which 5 to 40% by volume of either B fibers or SiC-coated fibers are dispersed in Ti or Ti alloy is used as a core material, and Ag and Cu are placed on the outer periphery of the alloy. The intermediate layer is clad with a material made of Ni or any of their alloys, and the outer periphery is clad with corrosion-resistant C.
A composite material for eyeglass frames made of a cladding material made of any one of the following alloys: U-based, Ni-based, Ag-based, Au-based, platinum group-based, and stainless steel-based.

Claims (1)

[Scope of Claims] 1) A Cu-based alloy having a core material containing 5 to 40% by volume of either B fibers or B fibers coated with SiC dispersed in Ti or a Ti alloy, and having corrosion resistance on the outer peripheral side. , N
A composite material for eyeglass frames made by cladding with any one of i-based, Ag-based, Au-based, platinum group-based, and stainless steel-based alloys as a covering material. 2) The core material is an alloy in which 5 to 40% by volume of either B fibers or C fibers coated with SiC are dispersed in Ti or Ti alloy, and on the outer periphery thereof, Ag, Cu, Ni, or any of their alloys is used. The material consisting of these materials is clad as an intermediate layer, and the outer periphery is further clad with a corrosion-resistant Cu-based, Ni-based, Ag-based, Au-based, platinum group, or stainless steel alloy as a covering material. Composite material for eyeglass frames.