JPS61159216A - Manufacture of ti base wire rod - Google Patents

Abstract

PURPOSE:To increase the adhesion strength and productivity of core rod and sheath material by engaging the sheath material consisting of Ni or Ni base alloy to the core rod consisting of Ti or Ti base alloy and by subjecting them to a hot extrusion work, annealing treatment, wire drawing and annealing treatment. CONSTITUTION:A composite rod is formed with covering the sheath material 2 consisting of Ni or Ni base alloy on the outer part of the core rod 1 consisting of Ti or Ti base alloy. The core rod 1 and sheath material 2 are cladded with pressure connection by subjecting this composite rod to a hot extrusion work. A Ti base wire rod is then formed by subjecting to annealing treatment and wire drawing and subjecting to annealing treatment further. Each spectacles frame member of a rim part, bridge part, temple part, etc. is formed thereafter with using the Ti base wire rod and with the brazing and plating treatment of these, a spectacle frame is assembled.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a method for producing a Ti-based wire material suitable for the circumference of eyeglass frames, and a core material made of Ti or a Ti-based alloy and a sheath material made of Ni or a Ni-based alloy. By applying hot extrusion processing, annealing processing, wire drawing processing, and annealing processing, a Ti-based wire material with high adhesion strength between the core material and sheath material, high productivity, and good plating properties can be obtained. It manufactures.

"Prior Art" Ti material is a material with excellent corrosion resistance and is also lightweight, so in recent years it has attracted attention as a material for frames of eyeglasses such as high-grade sunglasses. However, Ti material has the disadvantage of poor brazing properties and poor plating properties.
Eyeglass frames made of I material have not yet been put into practical use. In addition, conventionally, a method has been proposed in which Ni plating is formed on the surface of Ti material after Mo is electrodeposited (a plating method described in JP-A No. 53-23832) as a method without plating Ti material. has been done.

"Problems to be Solved by the Invention" However, in the above plating method, there is a limit to the thickness of the plating layer that can be formed on Ti, and the plating process takes time, causing problems in productivity. There are drawbacks.

Therefore, in order to manufacture eyeglass frames using Ti material, an eyeglass frame (the eyeglass frame described in JP-A-51-135751), which is made by crimping a Cu alloy cladding onto the surface of a Ti core material, has been proposed. Ta.

In the case of the Ti base line shrine used for this eyeglass frame, the Cu alloy is removed by etching etc. after the brazing process, making it possible to use Ti material for eyeglasses, which was previously impractical due to the processing surface. It is intended to be used as a frame circumference. However, in the Ti-based wire material mentioned above,
Brazing sometimes has the disadvantage of low strength due to the formation of very brittle intermetallic compounds between the Ti and Cu alloys.

``Object of the Invention'' The present invention has been made in view of the above circumstances, and uses a Ti core material that has a high degree of adhesion between the core material and the sheath material, has excellent productivity, and has excellent plating properties. The purpose of the present invention is to provide a method for manufacturing wire rods.

"Means for Solving the Problems" In order to solve the above-mentioned problems, the present invention covers a core material made of Ti (titanium) or a Ti-based alloy with a sheath material made of a Ni-based alloy or an N1-based alloy. , hot extrusion, annealing, wire drawing, and annealing.

``Example'' The drawing shows a cross section of a T1-based wire rod manufactured by carrying out an example of the present invention. Alternatively, a Ti-based wire material is formed by cladding the sheath material 2 made of a Ni-based alloy.

Next, a case will be described in which the Ti base wire material is manufactured by carrying out an embodiment of the present invention.

To form a Ti base line shrine, first, a core material made of T1 or Ti based alloy is covered with a sheath material made of Ni or N1 based alloy to form a composite material.

The Ti-based alloy used here preferably contains 90% or more of T1. The reason for this is that the Ti content is 90
This is because if it is less than %, the plastic workability of the Ti-based alloy deteriorates, and the specific gravity increases by 1° due to the added components, impairing its lightweight properties. In addition, the component elements added to Ti to obtain a Ti-based alloy include At (aluminum), Mn (vanium oxide), Fe (iron), □Cu (copper), Mo (
molybdenum), Cr (chromium), ■ (vanadium), W
(Tungsten) and C (Carbon), one or two types are useful, and when more than one type is added, the total amount thereof should be less than 10%. At this time, T1 or Ti-based alloy contains I], gas,
02 gas is usually included. Furthermore, it is desirable that the Ni-based alloy contains 80% or more of Ni. In addition, the component elements added to Ni to obtain a Ni-based alloy include Cr and Cu.

F6. A g (silver), Si (silicon), S (sulfur), Pb (lead), Pt (platinum), Au (gold), Sn (tin), Co (cobalt), rare earth elements, Mo, AI, N
b (niobium), Ti.

One or more of the component elements are useful,
When adding multiple types of these, the total amount should be 20
Make it smaller than %.

Next, the composite material is subjected to hot extrusion processing, and the core material 1 and the sheath material 2 are clad and crimped together. In this hot extrusion process,
It is preferable to set the area reduction ratio in the range of 2 to 5 degrees and carry out at 450 to 700°C. The reason why the area reduction ratio is set in the above range is that if the area reduction ratio is less than 2, the adhesion between the core material 1 and the sheath material 2 will be poor, and if the area reduction ratio is greater than 50, This is because the core material I and the sheath material 2 do not flow out uniformly during extrusion, making it impossible to perform accurate extrusion processing. In addition, the cladding ratio is Ti or T when the total volume is 1.
It is desirable that the volume ratio of the i-based alloy is 0.7 to 099. The reason for this is that if the clad ratio is smaller than 0.7, the overall weight will increase, and if it is larger than 0.99, the strength of the clad bonding surface will decrease, which is not preferred in practice.

Next, annealing treatment and wire drawing are performed, and further annealing treatment is performed to form a Ti-based wire rod. Here, the first annealing treatment is preferably performed at a temperature of 450 to 600°C for 1 minute to 30 minutes. In addition, the wire drawing process has an area reduction rate of IO
It is preferable to carry out at ~20%. The reason why the area reduction rate is limited as above is because if it is less than 10%, only the sheath material will stretch during drawing and cracks will occur in the core material, and if it is more than 20%, seizure or breakage will occur. . Furthermore, the second annealing treatment is preferably performed at a temperature of 450 to 600°C for 1 to 30 minutes.

Thereafter, each eyeglass frame member such as a rim portion, a brison portion, and a temple portion is formed using the Ti-based wire material, and these are brazed and plated to assemble the eyeglass frame. During this brazing process, the sheath material 2 made of Ni or Ni-based alloy formed by crimping the cladding on the outside of the core material 1 becomes the joint, so it can be easily brazed. .

In the plating process, brazing is a subsequent process, and N
Because of the treatment applied to the outer surface of the sheath material 2 made of 1 or Ni-based alloy, it is easy to obtain a plated surface with good plating and a good finish. We will explain the results of experiments conducted regarding the weight, brazing strength, bending strength, and corrosion resistance.

First, it is made of pure Ti, with a diameter of 50 mm and a length of 1000 m.
The core material is made of Ni-based alloy (components shown in the table shown later), has an outer diameter of 50.5 mm, an inner diameter of 50 mm, and a length of 1000 mm.
A composite material is formed by covering it with a sheath material of about 7 mm.
An extruded wire rod with a diameter of 10 mm was produced by extrusion molding at 00° C. using a hot isostatic extruder.

Next, the extruded wire rod is annealed at about 600 to 700°C to soften it, and then cold drawn. It was made into a wire rod with a diameter of 5 mm. Then, this wire is annealed at 600 to 700°C,
An eyeglass frame circumferential wire material with a diameter of 2.6 mm was produced by cold drawing.

The weight, bending strength, bending strength, and corrosion resistance of eyeglass frames manufactured based on the above-mentioned eyeglass frame circumferential wire material were determined using the above-mentioned procedure and using core and sheath materials having the compositions shown in the table below. Experiments were conducted on the weight, brazing strength, bending strength, and corrosion resistance of eyeglass frames produced using the same procedure. The results are shown in Table 1 on the next page.

The composition of the artificial sweat used in the experiment is as shown below, and a corrosion resistance experiment was conducted by immersing it in this artificial sweat for 5 days.

Sodium chloride 9.8g/ρ Urea 1.7g/ρ Glucose 02g/ρ Lactic acid 0.8cc Sodium sulfide 0.8g/Q.

Ammonia water 0.02g/C water
In addition, in Table 1, brazing strength is the breaking strength when each eyeglass frame is made using each material with the composition shown in the table above, and the bridge part and rim part are peeled off. This is the value obtained by measurement. The bending strength was determined by fixing one end of the temple part of an eyeglass frame with a thickness of 0.9 mm and a width of 3.5 mm, and applying a load to the other end with a cantilever beam with a span of 45 mm. This is the value obtained by measuring the load at the time of occurrence.

For comparison, the weight, brazing strength, and bending strength of a conventional Ti-based wire material prepared by forming a Ni plating layer with a thickness of 3 μm on a core material made of pure Ti by wet plating method are shown in the following table 2. Write it down in the table.

Table 2 As is clear from a comparison of the experimental results shown in Tables 1 and 2 above, the eyeglass frames manufactured based on the above-mentioned procedure are lightweight, have high brazing strength, and are made of artificial sweat. It also has excellent corrosion resistance. In terms of bending strength, T
1 alone structure is too low and insufficient for the frame circumference of glasses, but if the Ti-based wire material of the present invention is used, the bending strength is improved and reaches a moderate value, so it has not been put to practical use in the past. It has become clear that it can be used almost equally as nickel silver and Ni-based alloys.

"Effects of the Invention" - As explained above, the present invention covers a core material made of Ti or Ti-based alloy with a sheath material made of N1 or Ni-based alloy, and performs hot extrusion processing, annealing processing, and wire drawing processing. Compared to conventional Ti base wire materials manufactured by subjecting Ti materials to plating treatment, the sheath material has a higher degree of adhesion to the core material and has the effect of improving productivity. Furthermore, when plating is performed, since the sheath material on the surface has excellent plating properties, it is possible to perform plating with a well-finished plating surface that is free from scratches and stains.

[Brief explanation of drawings]

The drawing is a sectional view of a '1'i base wire manufactured by carrying out the method of the present invention.

Claims (1)

[Claims] Ni or Ni is added to the core material made of Ti or Ti-based alloy.
A method for producing a Ti-based wire rod, comprising the steps of covering the wire with a sheath material made of a base alloy, followed by hot extrusion, annealing, wire drawing, and annealing.