JPH07242978A - Alloy material for welding - Google Patents

Abstract

PURPOSE:To produce an alloy material for welding, improved in strength in a weld zone, although it is a welding material composed of high melting metals, and also to produce an alloy product by using this alloy material for welding. CONSTITUTION:This alloy material for welding contains W and/or Mo and a doping agent, and tensile strength in a melted and solidified part is at least 35kgf/mm<2>. This alloy material can be produced by a powder metallugical method by adding a doping agent to a powder of W oxide and/or Mo oxide. This doping agent is composed of a compound of at least one doping element selected from the group consisting of Y, Th, Cr, Zr, Hf, alkaline earth metal elements, and rare earth elements. This compound is added by 0.01-13wt.% in the form of at least one kind selected from oxide, nitride, carbide, boride, silicate, and aluminate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alloy material composed of a refractory metal, and more specifically, a welding alloy material which can be formed into an arbitrary shape by welding, and a manufacturing method thereof.
A welding alloy product using the same and a method for manufacturing the same.

[0002]

2. Description of the Related Art Generally, an alloy material made of this kind of high melting point metal is used for various purposes. For example, as a protective tube for a thermocouple for measuring the temperature of a high temperature furnace, a one-side sealed pipe made of a high melting point metal, such as Mo or W, whose one end is sealed is used. For this single-sealed Mo or W pipe, prepare a pipe made by cutting a bar of pure Mo or pure W into a gun drill or a pipe obtained by processing such as pipe drawing,
Cut a pure Mo rod with an outside diameter slightly smaller than its inside diameter, prepare an inside plug and fit it into one end of the tube, and then electron beam welding, arc welding, TIG welding, laser beam welding, etc. It is manufactured by melting and welding.

Further, a cooling pipe 150 at a high temperature
Has a shape as shown in FIG. 17 (a), and this cooling pipe is the straight pipe 15 shown in FIG. 17 (b).
1 and the curved pipe 152 shown in FIG. 17C are combined and welded at the joint 153.

Further, in the case of being used as a plate material, FIG.
As shown in FIG. 3, since the welding strength of the alloy material is low with respect to the molding of the square boat 160, after bending the plate material 161, the corner joining members 162 are formed at the four corners and the rivets 16 are formed.
The desired shape was obtained by the splicing method according to No. 3 and the like.

[0005]

As described above, in any case, refractory metal materials are often used by welding. However, since the welding strength is weak, it is desirable to avoid welding as much as possible. It is considered.

For example, a pure Mo or pure W single-piece sealed welded pipe is generally used as a thermocouple protection pipe for measuring the temperature of a furnace of 1300 ° C. or higher, a cooling pipe used at high temperature, and the like. To do this (winding pipe), welding and sheathing was essential. However, Mo or W is melted in the welded portion, and its mechanical strength is weaker than that of a normal Mo recrystallized material. Therefore, when it was set in the furnace, it often cracked or cracked when it hits the inner wall or obstacles (products, reflectors, heaters, bricks, etc.), often causing defects due to human factors.

However, if a high-melting-point alloy material that improves welding strength can be developed, it is considered that the manufacturing cost can be significantly reduced, and the applications thereof can be significantly expanded.

[0008] Therefore, one technical object of the present invention is to provide a welding alloy material which is a welding material made of a high melting point metal and whose strength of the welded portion is enhanced, and a manufacturing method thereof.

Another technical object of the present invention is to provide a welding alloy product using the above-mentioned welding alloy material.

[0010]

The inventors of the present invention have found that the tensile strength of the welded fusion zone is significantly improved in comparison with pure Mo by welding a rare earth-doped Mo material. It was the invention.

The known ones published in the literature and the like are not the data of melted Mo and W, but the lines, rods, plates, etc. having a recrystallized grain structure obtained by coarsening the fiber structure at high temperature. Mechanical properties (typically represented by tensile strength) were common.

However, conventional molten Mo or W
On the other hand, it was found that the tensile strength was lower than that of the recrystallized material, whereas the rare earth-doped material had a significantly improved tensile strength as compared with pure Mo or pure W.

That is, according to the present invention, a welding alloy material containing at least one of W and Mo and having a tensile strength of a melt-solidified portion of at least 35 kgf / mm ² is obtained. .

According to the present invention, in the welding alloy material, the welding alloy material is Y, Th, Cr, Zr,
It contains an oxide or an oxide mixture of at least one element selected from the group consisting of Hf, an alkaline earth metal element and a rare earth element, and the oxide or the oxide mixture is 0.01
An alloy material for welding is obtained which is characterized by containing 10 to 10% by weight.

Here, the welding alloy material of the present invention has a form such as a wire rod, a rod and a plate.

According to the present invention, there is obtained a welded alloy product made of this welding alloy material and characterized by being obtained by welding.

Further, according to the present invention, W oxide and Mo
In the method for producing an alloy material by powder metallurgy by adding a doping agent to at least one powder of oxides, the doping agent is Y, Th, Cr, Zr, Hf, an alkaline earth metal element, A compound of at least one doping element selected from the group consisting of rare earth elements, wherein the compound is at least one form selected from oxides, nitrides, carbon compounds, borides, silicates and aluminates. 0.01 to 13% by weight is added to obtain a welding alloy material manufacturing method.

According to the present invention, in the method for producing a welding alloy material, the welding alloy material is an ingot with respect to an alloy member containing 0.01 to 10% by weight of the oxide or oxide mixture of the doping element. The method for producing a welding alloy material is characterized in that the above-mentioned welding alloy material is obtained by performing the processing at a working rate of 60% or more.

In the present invention, the doping amount is set to 0.
The amount of doping is limited to 0.01 to 10% by weight.
If the amount is less than 10% by weight, the strength after welding is the same as that of pure Mo and is not effective, and if the amount exceeds 10% by weight, cracks and the like occur during plastic working including rolling, resulting in a markedly poor yield.
Furthermore, in the present invention, the optimum amount of doping is 0.
5 to 3% by weight is desirable.

Here, the rare earth metals that can be used in the present invention include La, Ce, Pr, Nd, Pm, Sm and E.
u, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu
Can be illustrated. In addition, the metals effective in the present invention include Y, Th, Mg, Ca, Sr, Hf, Zr and E.
It was r, Ba, Pf, and Cr. These metals include hydroxides, oxides, nitrides, carbides, borides, silicates,
Or selected from the group of aluminates. One or several kinds of these compounds and / or a mixture layer of one or several kinds of these compounds is mixed in a powder form in an amount of 0.005 to 13% by weight, and the powder mixture is subjected to reduction, pressing and sintering by a known method. Then
The obtained sintered body is subjected to a heat treatment (annealing) at a cross-sectional reduction rate (working rate) of at least 60% or more, and two or more materials which are plastically worked are prepared, and electron beam, TIG, The welded materials such as butt, arc, laser beam, etc. have markedly improved mechanical strength at the welded portion compared to pure Mo. Here, the reason why the cross-section reduction rate from the ingot is 60% or more is that the doping effect disappears when the processing strain is small.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a first example of a welded alloy product according to an embodiment of the present invention. As shown in FIG. 1, a welded alloy product 1 is formed by bending a molybdenum plate 2 and then welding the side walls 2a, 2b, 2c and 2d with their edges aligned. Reference numeral 3 is a welded portion.

2A and 2B are views showing a second example of the welded alloy product according to the embodiment of the present invention. FIG. 2A is a plan view and FIG. 2B is a front sectional view. As shown in FIGS. 2A and 2B, the welded alloy product 5 is formed by melting and welding the bottom portion 7 of the tubular body 6 made of molybdenum.

FIG. 3 is a diagram showing a third example of the welded alloy product according to the embodiment of the present invention. (A) is a halogen lamp for automobiles, (b) is a halogen lamp of (a) Mo. The joint between the support and the Mo foil is shown. The halogen lamp 10 includes outer shell forming members 16a, 16b, 1
In the 6c, the Mo support 13 connected by the pins 18 and 18 is erected. This Mo support 13
It is supported by the Mo foil 14. Also, Mo
The support 13 is connected to one end of the W filament 15 via the MoC sleeve 11 or further via the Mo mirror 12, respectively. Mo foil 14
There are those with knife edge and those with no knife edge, but the joining of Mo support 13 and Mo foil 14 is
As shown in FIG. 3B, they are joined by a welded portion 17.

FIG. 4 is a view showing a part using a fourth example of the welded alloy product according to the embodiment of the present invention, and FIG.
Shows the filament portion 20 of an incandescent lamp. The W filament 21 is crimped to a Mo sleeve 23 and fixed at one end 22 thereof, and the Mo sleeve 23 and the Mo support 24 are fixed by welding at a welding portion 25. The Mo sleeve 23 includes a standard type, a rugby ball type, and an inner type, as shown in FIGS. 4B, 4C, and 4D, respectively.

FIG. 5 is a diagram showing an outline of parts using a fifth example of a welded alloy product according to an embodiment of the present invention. A discharge lamp 30 such as mercury (Hg), sodium (Na), and a metal halide lamp 30. Is shown. The discharge lamp 30 is connected to the Mo electrode 33 or the Mo auxiliary electrode 34 via the Mo foil 32 on the pins 31 at both ends. The Mo electrode 33 is composed of a Mo support 35 and a Mo coil 36. The Mo electrode 33 and the Mo auxiliary electrode 34
Are enclosed by the enclosing portions 37 and 38. Welding is used to join the Mo foil 32 and the Mo auxiliary electrode 34 or the Mo support 35.

FIG. 6 is a view showing parts using a sixth example of the welded alloy product according to the embodiment of the present invention, showing an incandescent lamp such as Hg, N ₂ and the like. In the incandescent lamp 40, a Mo terminal 44 is connected to a pin terminal 46 provided in the outer shell supporting members 39 and 42 via a Mo foil 43, and the Mo support 44 extends upward to a Mo foil 47. The Mo foil 47 is connected to the Mo anchor 41. This Mo foil 43 and Mo support 4
The connection 4 and the connection between the Mo anchor 41 and the Mo foil 47 form a welded portion 48 and are joined by welding.

FIG. 7 is a view showing a part using the seventh example of the welded alloy product according to the embodiment of the present invention, and shows the crucible 50. The side wall 51 formed by combining the bottom portion 52 made of the Mo disk and the both ends of the Mo plate into a tubular shape is the welded portion 53,
54 is formed and welded. This crucible 50 is a crucible for sputter deposition, artificial jewelry (rubies, sapphires)
Used in melting crucibles and other high temperature crucibles.

FIG. 8 is a view showing parts using the eighth example of the welded alloy product according to the embodiment of the present invention. FIG. 8A is a partial cutaway view showing a high definition cathode ray tube (CRT) 55. , (B) are half-sectional views showing the structure of the high-definition electron gun 56. Further, FIG. 8C is a diagram showing the Mo sleeve portion 57a of this electron gun, and FIG.
It is a modified example of. Referring to FIG. 8A, the electron gun 56 is provided with red, blue, and green 56a, 56b, and 56c, respectively. Hereinafter, these are simply indicated by reference numeral 56. Figure 8
Referring to (b), the electron gun 56 has a Mo sleeve portion 5
7a, M which supports this via Mo strap 57b
o Cathode holder 57c and Mo sleeve portion 57a
A porous W disk 57d provided in the upper part of the above, a Mo cup 57e for accommodating the same, and a heater 57f made of Re-W alloy provided in the lower part of the cup 57e.

8 (c) and 8 (d), the Mo cups are joined to the Mo sleeve portion 57a of this electron gun by welding to form welded portions 58 and 59, respectively.

FIG. 9 is a view showing parts using a ninth example of the welded alloy product according to the embodiment of the present invention, and FIG. 9 (a) is a horizontal furnace using the ninth example, FIG. FIG. 9B shows a heater of the ninth example, and FIG. 9C shows a vertical furnace using the ninth example. Both vertical and horizontal furnaces have Mo heater 60
Are arranged. As shown in FIG. 9 (b), the Mo heater 60 has terminals 60 a and 60 b to which a heater body 60 c is connected and welded at welded portions 61, respectively.

FIG. 10 is a view showing a tenth example of the welded alloy product according to the embodiment of the present invention, and (a) and (b) both show boats for firing. The firing boat is used for firing ceramics, uranium oxide, plutonium oxide pellets, and rare earth magnets. As shown in FIG. 10A, the corner portion 62a of the boat body 62 is joined by welding, and the boat base 63 on which this is mounted is also at the corner portion 63a.
It is joined by welding. Further, as shown in FIG. 10B, the boat main body 64 and the boat base 65 are welded together to form a welded portion 66.

FIG. 11 is a diagram showing an eleventh example of a welded alloy product according to an embodiment of the present invention, showing a Mo shelf.
Referring to FIG. 11, in the Mo shelf on which the fired product used in the Mo high temperature furnace is placed, the Mo shelf plate 67 and the Mo support member 68 are joined by forming welded portions 69a and 69b.

FIG. 12 is a view showing a twelfth example of the welded alloy product according to the embodiment of the present invention, showing a reflector and a lid of a reverberatory furnace. The lid 70 of FIG. 12A is a Mo plate 7 respectively.
0a are laminated and assembled by the fixing member 70b, and formed by welding with the Mo plates 70a, 70d, 70e and the fixing members 70b, 70c, while the reflection plate is also formed by welding the Mo plate 71a and the fixing member 71b. Part 71
It is joined by welding such as c. As shown in FIG. 12B, for example, the Mo plate 70a and the fixing member 70b are joined by forming a welded portion 70f. 12
Similarly, in the reverberatory furnace shown in (c), the wall portion 72a and the supporting member 7 are also provided.
2b is a welded portion 72c, 72f, 72 by welding.
e is formed and joined.

FIG. 13 is a view showing a thirteenth example of the welded alloy product according to the embodiment of the present invention, which is a W mesh heater 73.
Is shown. The W mesh heater 73 has an outer frame portion 10.
The 0, 101 and the mesh portion 75 are welded to each other by forming welded portions 76, 77 and forming a welded portion 78. The outer frame portions 100 and 101 are each W
It is formed by welding two plates together.

FIG. 14 is a cross section showing a fourteenth example of a welded alloy product according to an embodiment of the present invention, showing an X-ray rotating anode tube. As shown in FIG. 14, the X-ray rotary anode 80 is
The rotary target 81 is provided with a Mo shaft 82 forming the central axis of the rotary target 81, a bearing 83 having a ball bearing 83a, and a drive shaft 84. The rotary target 81 is rotated around the shaft 79 via the drive shaft portion 84 and the Mo shaft 82. When the electron beam 86 from the electron beam generation source 85 is applied to the inclined surface of the rotary target 81, the X-ray flux 87 is emitted in the reflection direction. here,
The rotary target 81 is fixed to the Mo shaft 82 by a nut 88, but by welding, the welded parts 89a, 89
b and a welded portion 89c are formed to further firmly fix them.

FIG. 15 is a cross section showing a fifteenth example of a component using a welded alloy product according to an embodiment of the present invention, showing an electric contact portion. FIG. 15A is a front view of the silicon diode, and FIG. 15B is a sectional view showing a contact portion of the Mo substrate. As shown in FIG. 15 (a), the Mo wire 91 and the Mo electrode 92 are joined by welding (welded portion 93),
Silicon (Si) 9 is provided between the facing surfaces of the Mo electrodes 92.
4 are inserted and joined, and enclosed by a glass mold 95.

With reference to FIG. 15B, the contact portion 98 is welded to the Mo substrate 97 at the welded portion 99. Thus, the parts shown in FIG.
It can be used for various kinds of substrates such as semiconductor diodes, relay contacts for telephones, and heat sinks.

The welding alloy materials for the Mo alloy products in the first to fifteenth examples are manufactured as follows.
A La doping method will be described below as an example of the method for producing the alloy material. First, as an oxide of Mo, MoO ₂
Prepare powder (0.5 to 2 μm particle size), prepare an acidic aqueous solution of lanthanum hydroxide (La (OH) ₃ ), and
Dope ₂ in the specified amount and dry while mixing. Next, reduction is carried out in H ₂ and La-doped Mo powder (2 to
5 μm particle size). Other La dopants include
Lanthanum carbonate _{(La 2 (CO 2) 3} · 8H 2 O), lanthanum heptahydrate (LaCl (El) ₃ · 7H ₂ O), or molybdenum lanthanum _{(La 2 (MoO 4) 3} ) but the like, Both can be used as an aqueous solution, but this compound is decomposed at low temperature, finely pulverized, and dispersed in Mo powder as an oxide. Further, the doping compound for the MoO ₂ powder may be an oxide powder alone. This lanthanum oxide (La ₂ O ₃ ) -doped powder is subjected to a metal mold method known in powder metallurgy or hydrostatic pressing and sintering to form an ingot.
It is preferable that the wire rod has a square bar shape or a round bar shape, and the plate has a square plate ingot shape. The doping agent scatters during sintering and remains in the ingot in an amount of 0.01 to 10%. The ingot is warmed and subjected to plastic working such as rolling, rolling, forging, and wire drawing, and is further subjected to strain relief annealing several times to finish it into a predetermined shape. After that, two or more rods or plates were prepared and welded. Then, a tensile test was conducted to compare the strengths.

The details of the method of manufacturing the alloy material for welding will be described below.

Example 1 A welding alloy material (alloy 1) according to Example 1 of the present invention was manufactured as follows.

M doped with 1% by weight in terms of La ₂ O ₃
o An ingot of 20 mm x 20 mm having a square cross section was prepared by a die press and direct energization method to obtain an alloy member. Thereafter, hot rolling was performed on the alloy member at a temperature of 1400 to 1000 ° C. On the way, strain relief annealing (heat treatment) was performed at D9 mm to finish a rod with a diameter (hereinafter referred to as D) of 3 mm,
After centerless polishing, the alloy material for welding was obtained by cutting into D3 mm × 200 ml (L). The two were electron beam welded and a tensile test was conducted. The results are shown in Table 1 below.

Example 2 A welding alloy material (alloy 2) according to Example 2 of the present invention was manufactured in the same manner as the alloy in Example 1. Co ₂ instead of La ₂ O ₃ of Example 1
A D3 mm Mo rod doped with 1% by weight of O ₃ was prepared, arc-welded and subjected to a tensile test. The results are shown in Table 1 below.

(Example 3) A welding alloy material (alloy 3) according to Example 3 of the present invention was manufactured in the same manner as the alloy in Example 1. Y ₂ O instead of La ₂ O _{3 in} Example 1
₃₁ % by weight was compounded, a D3 rod was prepared, butt welded, and a tensile test was conducted. The results are shown in Table 1 below.

Example 4 A welding alloy material (alloy 4) according to Example 4 of the present invention doped with 0.5% by weight of CaO, thickness (hereinafter, referred to as T) 30 mm × width (hereinafter, referred to as B) A plate-shaped Mo ingot having a cross section of 200 mm is prepared, hot-rolled at 1400 to 1000 ° C., and T4.
A plate of 0 mm × B300 mm × l (L) was prepared and used as an alloy member. Cut out from the plate and form a thin rod D3.0mm x
l (el) is cut and centerless polished to finish,
Used as an alloy material for welding. This welding alloy material was used in Example 1.
Welded as described above and subjected to a tensile test. The results are shown in Table 1 below.

(Example 5) A welding alloy material (alloy 5) according to Example 5 of the present invention was manufactured as follows.

MoO ₂ powder (particle size 0.5 to ₂ μm) was added to H
The fO ₂ oxide powder was added and mixed while being crushed by a crusher, and then reduced with H ₂ to prepare a powder having a particle size of 2 to 5 μm. The doped Mo powder was pressed into a round bar shape by isostatic pressing and sintered to form an ingot of D30 mm as an alloy member. HfO ₂ is 2 in this ingot
It was doped by weight percent. Then 1400 ~ 1000 ℃
Groove roll, rolled into a round bar in the middle D9.0m
Heat treatment was performed at m. After that, the inner diameter is opened with a gun drill, and the outer diameter is finished by centerless polishing, as shown in FIG. 16, D3 mm × D1 mm × length (hereinafter, referred to as L) 20.
A 0 mm pipe 111 was prepared and used as an alloy material for welding. On the other hand, a D0.98 mm × L2 mm round bar 12 was made from the same material for a middle plug, and was inserted as a joint between the two pipes 111 and 112. After that, by arc welding, arrow 1 in the figure
The entire range indicated by 13 was melted, the inner plugs were welded until completely melted, and a tensile test was conducted. This is a strength test for single-ended pipes. Other alloys are also used in Example 1 described above.
It was created according to. Needless to say, the burr after welding is, of course, made to have the same size and surface roughness of the material by polishing with a grinder after polishing with a grinder. The tensile strength after welding is shown in Table 1 below.

The data of the tensile test show the average value of n = 10.

Example 6 A welding alloy material (alloy 13) according to Example 6 of the present invention was manufactured as follows.

W ₁₄ O ₁₁ W oxide powder (particle size 3 to 7 μm)
m) is prepared, an acidic aqueous solution of La (OH) ₃ is doped, and the mixture is stirred and dried. Next, reduction is carried out with H ₂ , and La ₂
A powder of O ₃ doped W (grain size _{3 to 4} μm) is made and shaped into a square rod by a die press, pre-sintered and directly energized sintered to make an ingot of 1 wt% of La ₂ O ₃ balance W, It was an alloy member. Its cross section is 20mm x 20mm,
Next, rolling is performed at 1600 to 1100 ° C and D1
A round bar was manufactured by heat treatment at 3.0 and D9.0.
Centerless polishing of the rod, D3.0mm × 200mm
After being finished to L and used as an alloy material for welding, the two were electron beam welded and subjected to a tensile test. The results are shown in Table 1 below.
Shown in.

[0051]

[Table 1] As can be seen from Table 1 above, the tensile strength of the pure Mo welding material is 25 kgf / mm ² , and the pure W is 27.5 k.
It is gf / mm ² , and the strength of the alloys of Examples 1 to 6 of the present invention is 2 to 3 times stronger than the conventional ones.
Further, some alloys have strengths higher than those of the recrystallized materials of pure Mo and pure W, and it was found that the alloys according to Examples 1 to 6 of the present invention have excellent strength after welding.

[0052]

As described above, according to the welding alloy material of the present invention, it is possible to provide a W product and a Mo product having excellent mechanical strength after welding.

According to the welding alloy material of the present invention,
It has become possible to easily mold products with different shapes or complicated shapes that have been impossible until now.

Further, according to the welding alloy material of the present invention,
Since ordinary powder metallurgical equipment can be used as it is, there is no need for equipment improvement or new equipment, and industrialization is easy.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first example of a welded alloy product according to an embodiment of the present invention.

FIG. 2 is a view showing a second example of a welded alloy product according to an embodiment of the present invention, (a) is a plan view and (b) is a sectional view.

FIG. 3 is a diagram showing a third example of a welded alloy product according to an embodiment of the present invention, (a) is a partial cross-sectional front view of a halogen lamp for automobiles, and (b) is a Mo support and a Mo foil. The welded portion is shown.

FIG. 4 is a diagram showing a fourth example of a welded alloy product according to an embodiment of the present invention, in which (a) is a perspective view of a filament portion of an incandescent light bulb, and (b), (c) and (d) are ( It is a front view which shows various examples of the sleeve of a) respectively.

FIG. 5 is a schematic view showing a fifth example of a welded alloy product according to the embodiment of the present invention.

FIG. 6 is a sectional view showing a sixth example of a welded alloy product according to an embodiment of the present invention.

FIG. 7 is a perspective view showing a seventh example of a welded alloy product according to an embodiment of the present invention.

FIG. 8 is a diagram showing parts using the eighth example of the welded alloy product according to the embodiment of the present invention, in which (a) is a CR for HDTV.
Partial cutaway view showing T, (b) is a half sectional view showing the structure of the electron gun of (a), (c) is a sectional view of the Mo sleeve of the electron gun of (b), (d) is (c). It is a modified example of.

9A and 9B are views showing parts using a ninth example of a welded alloy product according to an embodiment of the present invention, FIG. 9A is a partial sectional view of a horizontal furnace, FIG. 9B is a front view of a heater, and FIG. ) Is an internal plan view of the vertical furnace.

FIG. 10 is a tenth welding alloy product according to an embodiment of the present invention.
(A) and (b) show firing boats, respectively.

FIG. 11 is an eleventh view of a welded alloy product according to an embodiment of the present invention.
It is a perspective view showing an example of.

FIG. 12 is a twelfth example of the welded alloy product according to the embodiment of the present invention.
3A is a perspective view showing an example of FIG. 2A, in which (a) shows a lid and a reflector, (b) shows a part of (a), and (c) shows a reverberatory furnace.

FIG. 13 is a thirteenth welding alloy product according to an embodiment of the present invention.
It is a perspective view showing an example of.

FIG. 14 is a fourteenth embodiment of the weld alloy product according to the embodiment of the present invention.
It is a perspective view showing an example of.

FIG. 15 is a fifteenth welding alloy product according to an embodiment of the present invention.
2A is a front view of a silicon diode, and FIG. 1B is a cross-sectional view showing a contact of a Mo substrate.

FIG. 16 is a cross-sectional view showing a tensile strength test method for an alloy material for welding according to an example of the present invention.

FIG. 17A is a diagram showing an example of a conventional weld alloy product. (B) is a figure which shows one structural member of (a).
(C) is a figure which shows the other structural member of (a).

FIG. 18 is a diagram showing an example of a conventional alloy product.

[Explanation of symbols]

1 Welded alloy products 2 Molybdenum plates 2a, 2b, 2c, 2d Side walls 3, 17, 25, 48, 53, 54, 58, 59, 6
1, 66, 69a, 69b, 76, 77, 78, 89
a, 89b, 89c, 93, 99 Welded part 5 Welded alloy product 6 Main body 7 Bottom 10 Halogen lamp 11 MoC sleeve 12 Mo mirror 13 Mo support 18 pins 14 Mo foil 15 W filament 16a, 16b, 16c Outer shell forming member 20 Filament Part 21 W filament 22 One end 23 Mo sleeve 24 Mo support 30 Discharge lamp 31 Pin 32 Mo foil 33 Mo electrode 34 Mo auxiliary electrode 35 Mo support 36 Mo coil 37, 38 Enclosure 39, 42 Outer shell support member 40 Incandescent lamp 41 Mo Anchor 43 Mo foil 44 Mo support 46 Pin terminal 47 Mo foil 50 Crucible 51 Side wall 52 Bottom 56 Electron gun 57a Mo sleeve part 57c Mo cathode holder 57d Porous W disk 57e Mo cup 57f heater 60 Mo heater 60a, 60b terminal 60c heater body 62 boat body 62a corner 63 boat stand 63a corner 64 boat body 65 boat stand 67 Mo shelf plate 68 Mo support member 70 lid 70a Mo plate 70b fixing member 73 W Mesh heater 75 Mesh part 80 X-ray rotating anode 81 Rotating target 82 Mo shaft 83 Bearing 83a Ball bearing 84 Drive shaft 85 Electron beam source 86 Electron beam 87 X-ray flux 88 Nut 91 Mo line 92 Mo electrode 94 Silicon (Si) 97 Mo Substrate 98 Contact part 100, 101 Outer frame part

Claims (5)

[Claims] 1. At least one of W and Mo,
A welding alloy material containing a doping agent and having a tensile strength of at least 35 kgf / mm ² when melted and solidified. 2. The welding alloy material according to claim 1, wherein the welding alloy material contains Y as the doping agent,
It contains an oxide or an oxide mixture of at least one element selected from the group consisting of Th, Cr, Zr, Hf, an alkaline earth metal element and a rare earth element, and the oxide or oxide mixture is 0.01 to 10 An alloy material for welding, which is characterized by containing by weight. 3. A welding alloy product, which is made of the welding alloy material according to claim 1 and is obtained by welding. 4. A method for producing an alloy material by powder metallurgy by adding a doping agent to at least one powder of W oxide and Mo oxide, wherein the doping agent is
Y, Th, Cr, Zr, Hf, alkaline earth metal element,
The compound of at least one doping element selected from the group consisting of rare earth elements, the compound being an oxide,
0.01-1 in the form of at least one selected from nitrides, carbon compounds, borides, silicates and aluminates.
A method for producing an alloy material for welding, wherein the alloy material is added in an amount of 3% by weight. 5. The method for manufacturing a welding alloy material according to claim 4, wherein the welding alloy material is an ingot with respect to an alloy member containing 0.01 to 10% by weight of the oxide or oxide mixture of the doping element. A method for producing a welding alloy material, characterized in that the welding alloy material is obtained by performing a processing with a processing rate of 60% or more.