JPS61269997A - Brazing material for titanium material - Google Patents

Abstract

PURPOSE:To reduce the time for brazing and to improve brazing strength and workability by using a tape-shaped brazing material formed by combining many strands each having a sheath layer consisting of a layer having the m.p. lower than the m.p. of Ti on the outside of a Ti core material into a shell body consisting of a metal having the m.p. lower than the m.p. of Ti. CONSTITUTION:The brazing material B is made into the tape shape combined with the many strands each consisting of the Ti core material 11 enclosed with the sheath layer into the shell body 10 consisting of a Cu-Ni alloy. The Ti, Cu and Ni are quickly diffused into each other by the heating to be executed for brazing, thereby welding being executed. The quick brazing is thus made possible. Such brazing is made possible because the Ti diffusion of the Ti core materials 11 is made easy by the large contact area of the materials 11 with the sheath layer and therefore the reduction of the time for brazing and the operation are made easy. The components of the brazed part are made uniform and the brazing strength is improved.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a brazing material suitable for brazing titanium materials for eyeglass frames, and in particular to a brazing material having a composite structure of a large number of Ti core materials. This makes it possible to shorten brazing time and improve brazing strength.

``Prior Art'' As a brazing material used for gluing eyeglass frames made of titanium material, a brazing material having the structure shown in FIG. 6 has been known in the past. This brazing material A is constructed by covering a tape-shaped Ti core material 1 with an outer skin 2 made of a Ni-Cu alloy.The brazing material A is interposed between parts to be brazed and heated together with the parts. By brazing material A
The components are joined by melting, then cooling and solidifying.

"Problems to be solved by the invention" By the way, in the brazing material mentioned above, the melting point of Ti is 1e.
es℃, melting point of Ni is 458℃, melting point of Cu is 108℃
3℃, while the heating temperature during brazing is 900℃.
In addition to the reason that the temperature is about °C, because the Ti core color cross-sectional area ratio in the brazing material A is large, the Ti core color outer skin 2 does not melt sufficiently during heating during brazing. The problem was that sufficient brazing strength could not be obtained.

In particular, the pair of parts 3.4 shown in Fig. 7 are heated as shown in Fig. 8, and the brazing material A is inserted between these parts 3.4 for brazing. When carrying out this process, because the Ti core material 1 is not sufficiently melted for the above-mentioned reason, only the outer skin 2 melts and flows downward, as shown in Figure 9, and only the Ti core material 1 remains in the core shape. As a result, the molten outer skin 2 becomes loose in the brazed portion, making uniform brazing difficult and reducing brazing workability.

It is also possible to use a Ti alloy containing Ni or Cu as a brazing filler metal;
Since i-alloy is hard and brittle, it is difficult to draw or roll, which is disadvantageous for use in eyeglass frames.

``Object of the Invention'' The present invention has been made in view of the above circumstances, and it is possible to shorten brazing time and improve brazing workability, as well as improve brazing strength and provide a brazed part with stable quality. The purpose is to provide a brazing material that can scale.

"Means for Solving the Problems" In order to solve the above-mentioned problems, the present invention forms a strand of wire by forming a skin layer made of a metal with a lower melting point than Ti on the outside of a Ti core material. A plurality of these are combined inside an external body made of a metal with a melting point lower than that of Ti.

``Function'' The contact area between the Ti core material and the metal around it is significantly increased compared to conventional methods, which causes the T to be heated during brazing.
i and other metals rapidly diffuse into each other.

"Example" Figures 1 to 5 are for explaining an example of the present invention, and the brazing material B of this example is Cu (copper) -
It is a tape-shaped material in which a large number of Ti (titanium) core materials 11 are composited inside an outer body 10 made of a Ni alloy. In addition, this brazing material B contains 5 Ti.
0-75%, Ni 10-20%, Cu 10-20%
, each containing 50 to 75% Ti,
Contains 10 to 20% Ni and 10 to 20% Cu, and further contains B (boron), Zr (zirconium), and Si (
silicon) alone at 0.01 to 3%, or B and Z
It contains two or more components of r and Si in a total amount of 0.02 to 5% each.

To manufacture the brazing material B having the above configuration, first, a round bar-shaped Ti core material 11 as shown in FIG. 2, the diameter is reduced to form a strand 13 as shown in FIG. 3 having an outer skin layer 12A on the outside of the Ti core material II. In this diameter reduction process,
The Ti core material 11 is a single material and has excellent workability, and the diameter can be easily reduced due to the good workability of the Cu-Ni alloy. Next, a large number of cable wires 13 are prepared and a fourth cable wire 13 is prepared.
Insert it into the outer skin pipe I4 as shown in the figure, reduce the diameter, and
A base line 15 as shown in the figure is formed. Thereafter, the base line 15 is subjected to plastic working to obtain a tape-shaped brazing material B having a large number of Ti core materials 11 inside the outer body 10 as shown in FIG. The final diameter of the Ti core material 11 after the base line 15 is subjected to plastic working is preferably 0.5 mm or less. The reason for this is the Ti core material in brazing material B! This is because if the diameter of (2) is larger than 0.51 am, the contact area between the Ti core material 11 and the surrounding metal will not be sufficiently large compared to the conventional brazing material. Hence the integumentary tube! The diameter of the Ti core material 11 inserted into the brazing material B and the processing ratio of each diameter reduction process are as follows:
The diameter is set to 0.5 mm or less as described above. Here, in performing plastic working on the base line I5, since both the strand I3 and the outer skin pipe 14 are highly workable, the process is easy. Further, the outer skin tube 1
2 and outer vibrator 14 are the baseline! An alloy having components such that the composition of No. 5 has the above-mentioned ratio is adopted.

If brazing is performed using brazing material B having the above configuration, Ti, Cu, and N will be removed by heating for brazing.
Since i quickly diffuses into each other and melts, the materials to be joined can be brazed quickly.

This is because the contact area of the Ti core material 11 with the outer skin tube 12 is much larger than that of the conventional brazing material A, and the Ti in the Ti core material 11 can easily diffuse. In addition,
If Ti, Ni, and Cu are diffused quickly, the brazing time can be shortened, the brazing work becomes easier, and the components of the brazed portion become uniform, thereby improving the brazing strength.

By the way, the Ti core material 11 is not only made of Ti alone, but also a Ti alloy containing various additive components to improve the wettability to the parts to be joined and to improve the fit without impairing the workability. There is no problem. Further, at least one of the outer skin pipe 12 and the outer skin pipe 14 is N
It may be composed of i alone or Cu alone.

Furthermore, the number of strands 13 inserted into the outer skin pipe 14 can be set to an arbitrary number. Furthermore, in the embodiment described above, a larger number of base lines 15 may be assembled, inserted into the outer skin pipe, and reduced in diameter to produce a brazing material. Furthermore, the outer skin tube 12 into which the Ti core material 11 is inserted may be a porous pipe having a plurality of insertion holes, and in this case, a plurality of Ti core materials 11 are inserted into the outer skin tube 12 and the strands 13 are Form.

"Manufacturing Example and Test Example" A Ti core material was inserted into a shell tube with a composition of 50% Ni-50% Cu, outer diameter 60 mm, inner diameter 52 mm, and length 1000+ am, and wire was drawn by hydrostatic extrusion. Processed, diameter 2III! Obtain 1 strand of wire. Next, 5
It has a composition of 0%Ni-50%Cu and has an outer diameter of 60III
11 Pack 670 of the above-mentioned wires into a jacket pipe with an inner diameter of 56 aua and a length of 1000 W + O +, reduce the diameter to 25 mm + by hydrostatic extrusion, and then perform wire drawing to obtain a wire rod with a diameter of 1 mm, which was then rolled. After processing, it was possible to obtain a tape-shaped adhesive material with a width of 2.0 mm and a thickness of 0.21 mm.

The brazing material produced as described above was cut into pieces of 5 mm in length, each of which had a width of 20 mm, a thickness of l Ilm, and a length of 10 mm.
The pure Ti plate is placed horizontally, and a high frequency heating device (4MH
The brazing material was heated using a heating device with an output of 8 kW), and the time required for the brazing material to melt and flow, and the brazing strength when cooled after melting were investigated. For comparison, we prepared a brazing material having a structure equivalent to the conventional structure shown in Fig. 4 and having the same shape as the tape-shaped brazing material manufactured as described above. The time taken for the brazing material to flow and the brazing strength were also measured using a procedure similar to the above procedure. The results are shown in Table 1.

Table 1 shows that the material has a shorter melting time than conventional brazing materials.
Brazing strength is also improved. Therefore, it has been revealed that if brazing is performed using the brazing material of the present invention, the brazing time can be shortened, and a high-strength, high-quality brazing can be achieved.

"Effects of the Invention" As explained above, the present invention has a plurality of strands made of a metal with a melting point lower than Ti, each of which is made of a metal with a melting point lower than that of Ti. The Ti core material is integrated into the external body, and the contact area of the Ti core material with the surrounding metal is larger than that of conventional brazing materials, so the heating that accompanies brazing causes the Ti and the surrounding metal to interact with each other. Diffuses quickly and melts thoroughly. Therefore, by heating during brazing, it spreads sufficiently over the brazed area and has the effect of achieving uniform and high-strength brazing. Furthermore, since Ti and the surrounding metal are rapidly diffused by heating during brazing, melting is quick, brazing time is shortened, and brazing work can be simplified.

[Brief explanation of drawings]

Figures 1 to 5 are for explaining one embodiment of the present invention. Figure 1 is a cross-sectional perspective view showing the brazing material, and Figure 2 shows the state in which the Ti core material is inserted into the outer shell pipe. FIG. 3 is a perspective view of a bare wire; 492. ! Figure 5 is a cross-sectional perspective view of the base line, Figure 6 is a cross-sectional perspective view of a conventional brazing material, Figures 7 to 7 are Figure 9 is for explaining the state of use of conventional brazing material. Figure 7 is a cross-sectional view showing the conventional brazing material and the parts to be joined. Figure 8 is the state in which the parts to be joined are being heated. FIG. 9 is a sectional view showing a conventional brazing material and parts to be joined. IO...External body, 2...Ti core material,
12...Sheath pipe, 12A...Sheath layer, 13...Element wire, t4...Sheath pipe, Figure 1 Figure 2 Figure 3 Rod Figure 4 Figure 5

Claims (1)

[Claims] A plurality of wires constituted by forming an outer skin layer made of a metal with a lower melting point than Ti on the outside of a Ti core material are combined inside an outer body made of a metal with a lower melting point than Ti. A brazing material for titanium materials characterized by: