CN101194342B - Cladding material for discharge electrode, process for producing the same and discharge electrode - Google Patents
Cladding material for discharge electrode, process for producing the same and discharge electrode Download PDFInfo
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- CN101194342B CN101194342B CN200680020290XA CN200680020290A CN101194342B CN 101194342 B CN101194342 B CN 101194342B CN 200680020290X A CN200680020290X A CN 200680020290XA CN 200680020290 A CN200680020290 A CN 200680020290A CN 101194342 B CN101194342 B CN 101194342B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/067—Main electrodes for low-pressure discharge lamps
- H01J61/0675—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/067—Main electrodes for low-pressure discharge lamps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/067—Main electrodes for low-pressure discharge lamps
- H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
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- Pressure Welding/Diffusion-Bonding (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Aimed is to provide a cladding material excelling in deep-draw moldability for cup-shaped discharge electrode and a process for producing the same; etc. There is provided a cladding material comprising foundation layer (1) of pure Ni or Ni foundationd alloy composed mainly of Ni and surface layer (2) of pure Nb whose oxygen content is 550 ppm or below. This surface layer (2) is diffusion bonded directly or through an NiNb intermetallic compound layer of 8.0 m or less to the foundation layer (1). Preferably, the surface layer (2) is diffusion bonded to the foundation layer (1) by continuous annealing in an atmosphere of Ar gas whose dew point is -40 DEG C or below. This continuous annealing realizes efficient diffusion bonding of the surface layer (2) and the foundation layer (1) while easily suppressing the oxygen content of the surface layer (2) to 550 ppm or below.
Description
Technical field
The present invention relates to a kind of sparking electrode and electrode material thereof of the fluorescence discharging tube that for example uses as the background light of liquid crystal indicator.
Background technology
In liquid crystal indicator, use small-sized fluorescence discharging tube lamp as a setting.As shown in Figure 3, related fluorescence discharging tube comprises: glass tube 51, be formed with fluorescent film (not shown) on the internal face, and its inside is packaged with discharge with gas rare gas and mercury vapors such as () argon gas; And sparking electrode 52, constitute a pair of cold cathode at the both ends of the inside be arranged on this glass tube 51.Above-mentioned sparking electrode 52 has the form of cup-shaped (bottom tube-like is arranged), and this form is the pipe portion 53 with an end opening, and the other end of aforementioned tube portion 53 is by end plate portion 54 obturations.An end that connects the supportive conductors 55 of the end of above-mentioned glass tube 51 and sealed axle shape is welded in the above-mentioned end plate portion 54, lead 57 is connected the other end of this supportive conductors 55.Above-mentioned supportive conductors 55 is generally formed by W (tungsten), with laser welding itself and sparking electrode 52 is welded together usually.
Above-mentioned sparking electrode 52 is formed by pure Ni at present, the sparking electrode that the small fluorescent discharge tube of background light etc. is used, its size is, about internal diameter 1.5mm, about total length 5mm, about the wall thickness 0.1mm of pipe portion 53.Related sparking electrode is usually by carrying out deep drawing (deep drawing) and be shaped and be shaped integratedly having pure Ni thin plate with the wall thickness condition of equivalent thickness of aforementioned tube portion.
As mentioned above, though the effective sparking electrode of fluorescence discharge is good by formability and pure Ni that material character is stable forms, exist relatively shorter problem of lamp life-span.That is, fluorescence discharging tube is when lighting, and ion etc. bombard electrode, and the phenomenon (sputter (sputtering)) of atom takes place to emit from electrode metal.Because this sputter, electrode metal is consumed, and the atom of the electrode metal of the being emitted mercury interior with being sealed in glass tube combines the mercury vapor in the consumption glass tube.At present, the atom discharging amount of Ni when sputter that forms electrode metal is more, and promptly owing to the sputtering raste height, mercury consumption is big, thereby exists the easy problem that descends of life-span of discharge tube.
Therefore, in recent years, open 2002-110085 (patent documentation 1) puts down in writing, attempt forming sparking electrode with the low Nb of sputtering raste (niobium) as the Japan Patent spy.But Nb is more expensive than Ni.And the fusing point height of Nb (2793 ℃) when welding with the supportive conductors that is high-melting point metal W (3653 ℃) equally, must at high temperature weld.Therefore, form firm oxide-film easily at weld part.If the sparking electrode that keeps the state of paying will weld supportive conductors simultaneously at this oxide-film is sealed in the glass tube, oxide-film will decompose generation oxygen in discharge so.This oxygen reacts with the fluorescent film of pipe inner face, and fluorescent film is worsened.Therefore, after the welding of supportive conductors, must remove the operation of the oxide-film that forms at electrode surface.
Therefore, in recent years, open the paragraph 0024 of 2002-289138 (patent documentation 2) and the open WO2005/048285 (patent documentation 3) of international monopoly put down in writing as the Japan Patent spy, attempt forming inside and outside two-layer sparking electrode, skin is formed by Ni, and the internal layer that discharge is worked is formed by Nb in fact.In above-mentioned patent documentation 3, record, manufacture method as the sparking electrode of two-layer structure, the basic unit that is formed by Ni is carried out crimping with sheet metal with by the top layer that Nb forms with sheet metal, from this crimping material is carried out compound (clad) material that diffusion annealing forms, choose the base material, then its deep drawing is configured as cup-shaped.
Patent documentation 1: the Japan Patent spy opens the 2002-110085 communique
Patent documentation 2: the Japan Patent spy opens the 2002-289138 communique
Patent documentation 3: the open WO2005/048258 communique of international monopoly
When making above-mentioned composite material, need carry out diffusion annealing to the basic unit and the top layer of above-mentioned crimping material, but because Nb is easy oxidized material, so usually the crimping material is placed on batch annealing in the vacuum furnace.That is, the crimping material is loaded into vacuum furnace, after being evacuated in the stove, is warming up to set point of temperature, is maintained at this temperature then.In this case, because the heating atmosphere is a vacuum, so programming rate is slow, even shorten the maintenance temperature of target annealing temperature, in the process that arrives the target annealing temperature, perhaps from the process of target annealing temperature cooling, the time that is exposed to the high-temperature area more than 800 ℃ is elongated.Therefore, the NiNb intermetallic compound that generates between basic unit and top layer must be grown up.Under the thin situation of NiNb intermetallic compounds layer, two-layer associativity is no problem, if but intermetallic compounds layer is to a certain degree thick, when deep drawing is shaped so, will produce the crack herein, the distortion of basic unit can not be caught up with in the top layer when being shaped, might can generate the crack on the top layer.
On the other hand, the crimping material was being carried out under the situation of diffusion annealing, accelerating, and can suppress the excessive growth of NiNb intermetallic compounds layer to the intensification of target annealing temperature and the cooling after the annealing with continuous annealing furnace.In this case, in practicality, be necessary to make in the stove atmosphere to enclose for Ar atmosphere.But, according to inventor's experiment as can be known, enclose in (dew point is about-20 ℃) in common Ar atmosphere, might when being shaped, deep drawing produce the crack at the Nb layer, and when especially molding condition became severe, the crack can clearly produce.And, can not use nitrogen, hydrogen as heating atmosphere gas.This is because nitrogen can form nitride with Nb, and hydrogen is absorbed by Nb easily, and both all can make the embrittlement of Nb layer, and formability is worsened.
Summary of the invention
The present invention proposes in view of the above problems, and purpose is, a kind of composite material that deep drawing has excellent moldability for the cup-shaped sparking electrode and manufacture method thereof are provided, and provides by this composite formed sparking electrode.
Cladding material for discharge electrode of the present invention comprises: be the basic unit that the Ni base alloy of principal component forms by pure Ni or with Ni, and the top layer that forms by pure Nb, above-mentioned top layer by the NiNb intermetallic compounds layer or via the NiNb intermetallic compounds layer by diffusion-bonded in above-mentioned basic unit, form oxygen amount among the pure Nb on above-mentioned top layer below 550ppm, the bed thickness of above-mentioned NiNb intermetallic compounds layer is below 8.0 μ m.
According to this composite material, because its top layer is formed by the pure Nb of oxygen amount below 550ppm, so have good ductility.And, because above-mentioned top layer directly or via the NiNb intermetallic compounds layer below the 8.0 μ m that are difficult to produce the crack by diffusion-bonded in above-mentioned basic unit, so the associativity on above-mentioned basic unit and top layer is good.The good ductility on associativity that this is good and top layer promotes mutually, makes composite material have good deep drawing.
Preferably utilize the continuous annealing in dew point encloses for the Ar atmosphere below-40 ℃ that above-mentioned basic unit and top layer are carried out diffusion annealing.By this continuous annealing, the oxygen amount that can easily the top layer be absorbed is controlled at below the 550ppm, and the while is diffusion-bonded basic unit and top layer effectively, so the productivity ratio of composite material is good.
In addition, preferred above-mentioned basic unit is formed by Ni base alloy, and this Ni base alloy contains Nb, the Ta that 1.0mass% is above, 12.0mass% is following independent or compoundly, and remainder is made of Ni and unavoidable impurities.By in Ni, adding Nb, the Ta of ormal weight, can improve corrosion resistance to mercury vapor, can improve the durability of sparking electrode.
In addition, preferred its thickness in above-mentioned top layer is more than the 20 μ m, below the 100 μ m.By the thickness that makes the top layer is more than the 20 μ m, below the 100 μ m, can use minor N b just to guarantee to have and form the equal life-span of all sparking electrodes by pure Nb.Therefore, can reduce the material cost of composite material, have economy.
In addition, the thickness that preferably makes the top layer is below 70% with respect to the integral thickness of composite material.By so setting the thickness on top layer, can be when the shaping of cup-shaped sparking electrode, basic unit is worked as the supporting layer on top layer.So, can prevent to generate and result from the concavo-convex of luders band on the top layer that forms by the bigger Nb of yield point elongation, can guarantee good press molding.If the thickness on top layer surpasses 70% of integral thickness, even basic unit is set so, also be difficult to suppress above-mentioned concavo-convex generation as supporting layer, press molding descends on the contrary.Therefore, the thickness on top layer is preferably below 70% with respect to integral thickness, more preferably below 60%.
In addition, sparking electrode of the present invention has the pipe portion of an end opening and the end plate portion that the other end of aforementioned tube portion is stopped up, and aforementioned tube portion and end plate portion are made integratedly by press molding.Above-mentioned sparking electrode is by above-mentioned composite formed forming, and the internal layer of aforementioned tube portion and end plate portion is formed by the top layer of above-mentioned composite material.Because this sparking electrode is above-mentioned composite formed forming of utilizing deep drawing to have excellent moldability,, and because can save to the inoperative useless Nb amount of discharging, so can reduce material cost so productivity ratio is good.And because exist the basic unit that forms by pure Ni etc. in the outside of end plate portion, so also good with the weldability of supportive conductors.
In addition, the manufacture method of cladding material for discharge electrode of the present invention, comprise: crimping process, the top layer usefulness sheet metal that will to be the basic unit that forms of the Ni base alloy of principal component by pure Ni or with Ni form with sheet metal with by pure Nb is superimposed, carry out crimping, be made into the crimping material that basic unit and top layer are crimped; And the diffusion annealing operation, in dew point encloses for the Ar atmosphere below-40 ℃, make above-mentioned crimping material keep more than 15 seconds, below 120 seconds above-mentioned basic unit and top layer being carried out diffusion-bonded in 800～1100 ℃ annealing temperature zone.
According to this manufacture method, although utilize continuous annealing furnace that diffusion-bonded is carried out on the basic unit and the top layer of crimping material, but also can be easily the oxygen amount of composite material be reduced to below the 550ppm, and the thickness at the NiNb intermetallic compounds layer that produces between top layer and the basic unit can be suppressed at below the 8.0 μ m.Therefore, can easily make the good composite material of deep drawing, productivity ratio is good.
In this manufacture method, can form above-mentioned basic unit by enough Ni base alloys, one or both of this Nb, Ta that Ni base alloy total contains more than the 1.0mass%, 12.0mass% is following, remainder is made of Ni and unavoidable impurities.And, can be provided with the composite material that carried out above-mentioned diffusion annealing is implemented finish rolling, the finish rolling operation that the thickness of above-mentioned composite material is adjusted.
Description of drawings
Fig. 1 is the sectional view of the major part of the cladding material for discharge electrode that relates to of embodiments of the present invention.
Fig. 2 is the longitudinal section of the effective sparking electrode of fluorescence discharge that relates to of embodiments of the present invention.
Fig. 3 is the longitudinal section of major part that expression possesses the fluorescence discharging tube of the effective sparking electrode of existing fluorescence discharge.
Symbol description
1 basic unit
2 top layers
11 pipe portions
12 end plate portions
Embodiment
Fig. 1 is the sectional view of the cladding material for discharge electrode that relates to of embodiments of the present invention, this composite material comprises by pure Ni or with Ni being the basic unit 1 that forms of the Ni base alloy of principal component and the top layer 2 that is formed by pure Nb, above-mentioned top layer 2 is carried out roll (roll) crimping in above-mentioned basic unit 1, and then by diffusion-bonded.Though above-mentioned top layer 2 via the NiNb intermetallic compounds layer as thin as a wafer below the 8.0 μ m by diffusion-bonded in above-mentioned basic unit 1, in Fig. 1, the diagram of this NiNb intermetallic compounds layer is omitted.About this intermetallic compounds layer, in the explanation of the manufacture method of this composite material described later, be illustrated.
Form pure Ni, the Ni base alloy (below, they are referred to as " Ni Base Metal ") of above-mentioned basic unit 1, oxidative resistance is good, and cold-workability is also good, and deep drawing is also good.Above-mentioned Ni Base Metal, its Ni content is more than the 80mass%, is more preferably more than the 85mass%, preferably comprise with the alloying element of Ni solid solution (for example, Nb, Mo, W, Ta, V, Ti) in more than one, remainder is made of Ni and unavoidable impurities.In the above-mentioned Ni base alloy, further preferably contain Nb, the Ta of 1.0～12.0mass%, the Ni-Nb alloy that remainder is made of Ni and unavoidable impurities, Ni-Ta alloy, Ni-Nb-Ta alloy independent or compoundly.Nb, Ta be so long as the addition of this degree is just harmless to formability, and have the effect of raising to the corrosion resistance of mercury vapor, can improve the durability of electrode.And, more preferably contain the W of 2.0～10mass% and remainder and come down to the Ni-W alloy that constitutes by Ni.W is also the same with Nb, Ta, can improve the corrosion resistance to mercury vapor.Though can be with W and above-mentioned Nb and/or the compound together interpolation of Ta that contains scope, in this case, preferably the amount with W is controlled at below about 6.0%.
Above-mentioned top layer 2 is formed by pure Nb, and is few more good more by gases such as the oxygen of Nb absorption (solid solution), hydrogen, nitrogen easily.As described later, this composite material industrial by will be superimposed as the sheet metal of the material of each layer, after carrying out crimping, then in Ar atmosphere is enclosed, the crimping material that obtains annealed and manufacturedly go out, in this case, being comprised in moisture in the Ar gas decomposes the oxygen that generates and might be absorbed by Nb in high temperature.After absorbing oxygen, if the oxygen amount among the Nb surpasses 550ppm, the ductility of Nb will significantly worsen so, and what accompany therewith is that the deep drawing formability of composite material also worsens.Therefore, in the present invention, the oxygen concentration among the pure Nb on formation top layer is controlled in below the 550ppm, preferably is controlled in below the 400ppm.And, because pure Nb forms by the vacuum melting manufactured, so the oxygen amount among the pure Nb that produces is below about 200ppm.
The thickness on above-mentioned top layer 2 needs about 20 μ m from the viewpoint of the consumption form of sparking electrode, consider fail safe and with the balance of the integral thickness of composite material, need to be preferably about 40～80 μ m about 20～100 μ m.On the other hand, from guaranteeing the viewpoint of deep drawing formability, the integral thickness of composite material is about 0.1～0.2mm.Consider the thickness on above-mentioned top layer 2, and in order to ensure the thickness of above-mentioned integral body, the thickness of above-mentioned basic unit 1 is set suitably, if it is from the viewpoint of the weldability of guaranteeing support electrode, just enough about 20～50 μ m.And, for above-mentioned basic unit 1 is prevented to make it to play a role with supporting layer as the distortion on top layer 2, when being shaped, guarantees deep drawing good press molding, the thickness that makes above-mentioned top layer 2 is that the aggregate thickness (integral thickness of composite material) on top layer 2 and top layer 1 is below 70%, to be preferably below 60%.
Fig. 2 has shown the sparking electrode of the cup-shaped that uses above-mentioned composite material deep drawing shaping.This sparking electrode has the end plate portion 12 of the other end of the open pipe portion of an end 11 and this pipe portion of obstruction, and above-mentioned end plate portion 12 and aforementioned tube portion 11 form.And the internal layer of sparking electrode is formed by the top layer 2 of above-mentioned composite material.Under situation about using as sparking electrode, because the part that consumes because of discharge mainly is facial in the bottom of sparking electrode, so by form the internal layer of sparking electrode with top layer 2, can guarantee to have the flash-over characteristic equal with the sparking electrode that is only formed by Nb, the useful life of fluorescence discharging tube, the while can also reduce the use amount of Nb.And, because the existence of basic unit 1, also become easy with the welding of supportive conductors.
Above-mentioned cup-shaped sparking electrode, carries out press molding and is shaped by deep drawing as the shaping material by the discoideus base material that will form from above-mentioned composite material Punching Technology.When the Punching Technology of above-mentioned base material, for example also the part of this base material can be connected the outer ring portion of composite material by connecting portion, deep drawing is shaped behind a plurality of cup-shaped sparking electrodes, again from the coupling part from sparking electrode.
At this, be illustrated with regard to the manufacture method of above-mentioned composite material.At first, carrying out the roll crimping then as the last superimposed raw-material Nb sheet (top layer sheet metal) of the raw-material Ni Base Metal sheet (basic unit's sheet metal) of basic unit 1 as top layer 2.That is, the superimposed material that superimposed Ni sheet and Nb sheet form is carried out crimping by a pair roller.This crimping can be carried out in cold worked mode.The reduction ratio of roll crimping is generally about 50～70% just.This manufacturing process is called as crimping process.By this crimping process, obtain the crimping material that basic unit and top layer are crimped.
Then, about 800～1100 ℃, preferably under the temperature about 900～1050 ℃, above-mentioned crimping material is carried out diffusion annealing.This manufacturing process is called as " diffusion annealing operation ".If discontented 800 ℃, diffusion is difficult to take place so, on the other hand, if surpass 1100 ℃, diffusion is very remarkable so, grows up at short notice at the NiNb intermetallic compounds layer that the interface on the basic unit of crimping material and top layer generates, and its thickness surpasses 8 μ m.Because thickness surpasses the such NiNb intermetallic compounds layer of 8 μ m and is highly brittle, to split easily, institute is so that the formability deterioration of composite material.The thickness of preferred above-mentioned NiNb intermetallic compounds layer is below the 6.5 μ m.In the time that above-mentioned 800～1100 ℃ temperature province should keep, be preferably about 15～120 seconds.Under discontented 15 seconds and target annealing temperature were situation about 800 ℃, diffusion was not enough, and bond strength descends, even the formability of composite material is worsened.On the other hand, surpassing about 120 seconds and the target annealing temperature is under the situation about 1100 ℃, diffusion excessively, the NiNb intermetallic compounds layer can significantly be grown up, bond strength descends, and still might make the formability deterioration.Preferred target annealing temperature is about 900～1050 ℃.
As the method for annealing that can easily satisfy above-mentioned diffusion annealing condition, recommending to enclose with Ar atmosphere is the continuous annealing of heating atmosphere.Utilize continuous annealing furnace to implement above-mentioned continuous annealing.In the tunnel of continuous annealing furnace (tunnel) stove, supply with Ar gas, make and be malleation (than the pressure about the high approximately 0.0005～0.001MPa of atmospheric pressure) in this stove, this continuous annealing furnace is carried out temperature control, thereby on the length direction of stove, obtaining the desired temperatures distribution.In this continuous annealing furnace, supply with processed material (for example crimping material of banded (strip)), conveyance speed by in accordance with regulations is to the length direction conveyance of stove, according to conveyance speed and preformed Temperature Distribution, can give temperature, the retention time of processed material regulation.
When carrying out above-mentioned continuous annealing, for the Ar gas of supplying with in the present invention, make its dew point for below-40 ℃, be preferably below-45 ℃.If dew point surpasses-40 ℃, the moisture that is contained in so in the Ar gas increases, and this moisture decomposes the oxygen that generates and can be absorbed by Nb under the annealing temperature of high temperature.Therefore, the ductility on top layer worsens, and the formability of composite material reduces.By making at dew point is during Ar atmosphere below 40 ℃ is enclosed and the retention time in 800～1100 ℃ temperature province is 15～120 seconds, the oxygen concentration on the top layer of composite material can be suppressed at below the 550ppm, and the ductility that can suppress the top layer worsens.
The diffusion annealing of above-mentioned crimping material also can be carried out under vacuum.Especially for the oxygen amount among the pure Nb that will form top layer 2 is suppressed at below the 550ppm, the heating cooling means of above-mentioned annealing conditions is satisfied in preferred employing.As an example, for example can adopt following heating in vacuum method.Use is provided with the vacuum chamber of heater in chamber, object being treated is contained in vacuum chamber, after making chamber interior become vacuum, utilize above-mentioned heater apace object being treated to be heated to set point of temperature and maintenance, stop heating during cooling, in vacuum chamber, import Ar gas, cooling apace simultaneously.If carry out diffusion annealing in a vacuum, between basic unit 1 and top layer 2, generate the NiNb intermetallic compounds layer hardly so, can be directly with top layer 2 diffusion-bonded in basic unit 1.
In the time of necessary, can carry out finish rolling with the composite material of cold worked mode after to diffusion annealing.Can adjust the thickness of slab of composite material thus.And, softening after the finish rolling in order to make material, in case of necessity also can with the same condition of above-mentioned diffusion annealing under implement annealing.The composite material of Zhi Zaoing can be suitable width by cutting in case of necessity as mentioned above, and then will be somebody's turn to do by the strip material Punching Technology of cutting and become the base material, and this blank is used to press molding.
Below, enumerate embodiment and more specifically describe the present invention, but the present invention does not explain because of relevant embodiment with being limited.
Embodiment
According to following main points, be produced in the basic unit that forms by pure Ni the sample of the multiple composite material on the top layer that forms by pure Nb with various condition diffusion-bonded.Prepare in advance as basic unit raw-material pure Ni sheet (wide 30mm, long 100mm, thick 0.5mm) and as raw-material pure Nb sheet (the wide 30mm on top layer, long 100mm, thick 0.15mm), they are superimposed, carry out the roll crimping in cold worked mode, obtain the compressing piece that thickness is 0.28mm thus.The continuous annealing furnace that this compressing piece is enclosed by Ar atmosphere is implemented diffusion annealing with the multiple condition shown in the table 1, each composite material that obtains is implemented cold rolling, and the thickness of each composite material is adjusted into 0.15mm.In addition, in vacuum furnace, carry out batch annealing for a part of compressing piece with the condition shown in the table 1, cold rolling to the composite material enforcement that obtains, make it reach above-mentioned thickness.
The sample of each composite material of making is as mentioned above imbedded in the resin, the resin mass that obtains is ground, the cross section of the composite material of imbedding is exposed on the surface.Then, for the sample of each composite material, utilize electron microscope (1000～3500 times of multiplying powers) to measure the average thickness of the NiNb intermetallic compounds layer that between the basic unit of this composite material and top layer, generates.In addition, choose analytic plate, utilize oxygen nitrogen analysis device (model EMGA-520, the hole field makes made) that the oxygen amount is measured from each composite material.Because the oxygen amount in the basic unit is about 1～2ppm, and is considerably less, thus with the oxygen amount measured as the oxygen amount in the top layer.In table 1, show these measurement results together.
Then, utilize above-mentioned each composite material, as shown in Figure 2, do not carry out intermediate annealing, by the pull and stretch processing of 10 operations, deep drawing shaping external diameter is that 1.1mm, internal diameter are that 0.9mm, pipe minister are the cup-shaped sparking electrode of 4mm, the slight crack generation state of the cup-shaped sparking electrode after visualization is shaped.In table 1, show this result together.Because the basic unit of composite material has good ductility, thereby for the composite material of any one sample, with the skin of the corresponding cup-shaped sparking electrode of the basic unit of composite material, all do not produce slight crack, can be formed into final operation always.On the other hand, in composite material, shown in the forming results of table 1,, the situation that produces slight crack is arranged at the internal layer of the cup-shaped sparking electrode corresponding with the top layer of composite material.By inference, this slight crack is the distortion that can not catch up with basic unit when being shaped because of the top layer of composite material, and breaking forms.
According to table 1, because the average thickness of NiNb intermetallicization and thing layer is controlled in below the 6.5 μ m in the composite material of example, and the oxygen amount on top layer is also below 380ppm, so obtain good deep drawing formability.Relative therewith, in the dew point of Ar gas was sample No.4 and 5 composite material more than-35 ℃, the oxygen amount on top layer became too much more than 700ppm, and the ductility on top layer worsens, and produces slight crack on the top layer.In addition, in the composite material of the annealed test portion No.3 of vacuum furnace, because the time that is maintained at more than 800 ℃ is elongated inevitably, intermetallic compounds layer is exceedingly grown up, thereby the deep drawing deterioration.
Table 1
Claims (8)
1. a cladding material for discharge electrode is characterized in that, comprising:
By pure Ni or with Ni the Ni base alloy of the principal component basic unit, the NiNb intermetallic compounds layer that form and the top layer that forms by pure Nb, wherein,
Described top layer via described NiNb intermetallic compounds layer by diffusion-bonded in described basic unit,
The oxygen amount that forms among the pure Nb on described top layer is below the 550ppm, and the thickness of described NiNb intermetallic compounds layer is below the 8.0 μ m.
2. cladding material for discharge electrode as claimed in claim 1 is characterized in that:
Described basic unit and top layer in dew point encloses for the Ar atmosphere below-40 ℃ by continuous annealing by diffusion-bonded.
3. cladding material for discharge electrode as claimed in claim 1 is characterized in that:
Described basic unit is formed by Ni base alloy, one or both of this Nb, Ta that Ni base alloy total contains more than the 1.0mass%, 12.0mass% is following, and remainder is made of Ni and unavoidable impurities.
4. as each the described cladding material for discharge electrode in the claim 1～3, it is characterized in that:
The thickness on described top layer be 20 μ m above, below the 100 μ m, and be below 70% with respect to the integral thickness of composite material.
5. sparking electrode is characterized in that:
Have the end plate portion of the other end of open pipe portion of an end and the described pipe of obstruction portion, described pipe portion and end plate portion are produced integratedly by press molding,
Described sparking electrode is described composite formed and obtain by in the claim 1～4 each, and the internal layer of described pipe portion and end plate portion is formed by the top layer of described composite material.
6. the manufacture method of a cladding material for discharge electrode is characterized in that, comprising:
The top layer usefulness sheet metal that crimping process will be the basic unit that forms of the Ni base alloy of principal component by pure Ni or with Ni to be formed with sheet metal with by pure Nb is superimposed, carries out crimping, is made into the crimping material that basic unit and top layer are crimped; And
The diffusion annealing operation keeps described crimping material more than 15 seconds, below 120 seconds described basic unit and top layer to be carried out diffusion-bonded in dew point encloses for the Ar atmosphere below-40 ℃ and in the annealing temperature zone at 800～1100 ℃.
7. the manufacture method of cladding material for discharge electrode as claimed in claim 6 is characterized in that:
Described basic unit is formed by Ni base alloy with sheet metal, and this Ni base alloy adds up to and contains that 1.0mass% is above, the Nb below the 12.0mass%, among the Ta one or both, and remainder is made of Ni and unavoidable impurities.
8. as the manufacture method of claim 6 or 7 described cladding material for discharge electrode, it is characterized in that, comprising:
The composite material that carried out described diffusion annealing is implemented finish rolling, the finish rolling operation that the thickness of described composite material is adjusted.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005168364 | 2005-06-08 | ||
| JP168364/2005 | 2005-06-08 | ||
| PCT/JP2006/311185 WO2006132166A1 (en) | 2005-06-08 | 2006-06-05 | Cladding material for discharge electrode, process for producing the same and discharge electrode |
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| Publication Number | Publication Date |
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| CN101194342A CN101194342A (en) | 2008-06-04 |
| CN101194342B true CN101194342B (en) | 2010-05-19 |
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| CN200680020290XA Expired - Fee Related CN101194342B (en) | 2005-06-08 | 2006-06-05 | Cladding material for discharge electrode, process for producing the same and discharge electrode |
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| Country | Link |
|---|---|
| JP (1) | JP4807757B2 (en) |
| KR (1) | KR101202160B1 (en) |
| CN (1) | CN101194342B (en) |
| TW (1) | TWI362683B (en) |
| WO (1) | WO2006132166A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012023172A (en) * | 2010-07-14 | 2012-02-02 | Sumitomo Heavy Ind Ltd | Electrode and determination method of configuration ratio of electrode material |
| JP7331447B2 (en) * | 2019-05-14 | 2023-08-23 | 株式会社プロテリアル | Ni--Nb laminated plate material and manufacturing method thereof, Ni--Nb alloy plate material and manufacturing method thereof |
| CN110202019A (en) * | 2019-07-03 | 2019-09-06 | 安徽澳德矿山机械设备科技股份有限公司 | A kind of preparation method of bimetallic pipe billet and its prepare mold |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595603A (en) * | 2003-09-12 | 2005-03-16 | 三垦电气株式会社 | Electrode for cold cathode discharge tube and electrode assembly for cold cathode discharge tube |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH062383B2 (en) * | 1990-03-28 | 1994-01-12 | 新日本製鐵株式会社 | Titanium clad steel sheet with good workability and method for producing the same |
| JP3679397B2 (en) * | 2002-12-18 | 2005-08-03 | 株式会社東京カソード研究所 | Electrode member for discharge tube, discharge tube using the same, and liquid crystal display |
| JP2004355971A (en) * | 2003-05-29 | 2004-12-16 | Tokyo Cathode Laboratory Co Ltd | Electrode for fluorescent lamp, its manufacturing method, and fluorescent lamp |
| KR20060123273A (en) * | 2003-11-13 | 2006-12-01 | 가부시키가이샤 네오맥스 마테리아르 | Discharge electrode clad material and discharge electrode |
| JP2005183154A (en) * | 2003-12-19 | 2005-07-07 | Neomax Material:Kk | Cladding material for discharging electrode and discharging electrode |
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2006
- 2006-06-05 JP JP2007520084A patent/JP4807757B2/en not_active Expired - Fee Related
- 2006-06-05 CN CN200680020290XA patent/CN101194342B/en not_active Expired - Fee Related
- 2006-06-05 WO PCT/JP2006/311185 patent/WO2006132166A1/en active Application Filing
- 2006-06-05 KR KR1020077030270A patent/KR101202160B1/en not_active IP Right Cessation
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595603A (en) * | 2003-09-12 | 2005-03-16 | 三垦电气株式会社 | Electrode for cold cathode discharge tube and electrode assembly for cold cathode discharge tube |
Non-Patent Citations (2)
| Title |
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| JP特开2004-199965A 2004.07.15 |
| JP特开2004-355971A 2004.12.16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4807757B2 (en) | 2011-11-02 |
| TWI362683B (en) | 2012-04-21 |
| JPWO2006132166A1 (en) | 2009-01-08 |
| KR101202160B1 (en) | 2012-11-15 |
| KR20080027788A (en) | 2008-03-28 |
| TW200707500A (en) | 2007-02-16 |
| CN101194342A (en) | 2008-06-04 |
| WO2006132166A1 (en) | 2006-12-14 |
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