CN101007350A - Method for manufacturing high density semi-products or elements - Google Patents
Method for manufacturing high density semi-products or elements Download PDFInfo
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- CN101007350A CN101007350A CNA2006101675743A CN200610167574A CN101007350A CN 101007350 A CN101007350 A CN 101007350A CN A2006101675743 A CNA2006101675743 A CN A2006101675743A CN 200610167574 A CN200610167574 A CN 200610167574A CN 101007350 A CN101007350 A CN 101007350A
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- molybdenum
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- tungsten
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title abstract description 7
- 238000005245 sintering Methods 0.000 claims abstract description 22
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 18
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011733 molybdenum Substances 0.000 claims abstract description 13
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 12
- 239000011265 semifinished product Substances 0.000 claims abstract description 12
- 239000000956 alloy Substances 0.000 claims abstract description 9
- 229910001182 Mo alloy Inorganic materials 0.000 claims abstract description 5
- 239000011148 porous material Substances 0.000 claims abstract description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 14
- 239000010937 tungsten Substances 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 9
- 238000001513 hot isostatic pressing Methods 0.000 claims description 7
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- 229910001080 W alloy Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- 238000003825 pressing Methods 0.000 abstract description 15
- 239000000463 material Substances 0.000 abstract description 9
- 229910045601 alloy Inorganic materials 0.000 abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000007772 electrode material Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910008423 Si—B Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010574 gas phase reaction Methods 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000002459 porosimetry Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
-
- 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
- H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- 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
- H01J61/073—Main electrodes for high-pressure discharge lamps
- H01J61/0735—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Discharge Lamp (AREA)
Abstract
The invention relates to a method for producing semifinished products or elements made from material of molybdenum, molybdenum alloy, wolfram or wolfram alloy having average relative density >98.5%, relative core density >98.3%, the method includes sintering relative density D of material as 90%<D<98.5%, and ratio of closed pores relative to total porosity is >0.8, and processing hot-isostatic-bonding and pressing under temperature is 0.40 to 0.65x solidus temperature and pressure is 50 to 300 MPa. The elements produced by the method such as used as electrode having many improved service life characteristic.
Description
Technical field
The present invention relates to the method for a kind of molybdenum, molybdenum alloy, tungsten or tungsten alloy material manufacturing semi-finished product or element by average relative density＞98.5%, relative core density＞98.3%.
Background technology
Refractory metal molybdenum, tungsten and their alloy are made by powder metallurgy usually.Concentrate is as initial product, and to form intermediate product, reduction generates metal dust then through chemical process.In this case, reducing agent is a hydrogen.The reduction before, among or afterwards, alloying element may be blended in wherein.
Typical molybdenum alloy is TZM (Ti-Zr-C-alloy molybdenum), Mo-La
2O
3, Mo-Y
2O
3And Mo-Si-B.On the tungsten side, that should be mentioned in that is AKS-W (K-Doped Tungsten), W-ThO
2, W-La
2O
3, W-Ce
2O
3, W-Y
2O
3And AKS-W-ThO
2Especially, AKS-W and AKS-W-ThO
2Be used for lighting engineering, here in particular for filament and electrode.The potassium additives of the minute bubbles form of finding among the AKS-W makes grain growth stable, microstructure that can stable for extended periods of time thus even under very high processing temperature.This endurance life characteristic for the electrode that is used for heavily loaded lamp has the importance of essence, and heavily loaded lamp is metal halide and short-arc lamp for example, and its surface temperature reaches 2600 ℃.
Powder is neutralized tightly by mold pressing or isostatic cool pressing.Large-sized semi-finished product are preferably made by isostatic cool pressing system.With regard to steel wire bar and little rolled sheet bar, mold pressing and isostatic cool pressing system all can be used.If molybdenum powder has the typical Fisher particle diameter of 2 to 5 μ m, tungsten powder has the typical Fisher particle diameter of 1.5 to 4.5 μ m, and the branch bulk density that then obtains is 0.11 to 0.17 (molybdenum) and 0.13 to 0.22 (tungsten).If used pressing pressure is 200 to 500MPa, resulting minute green compact density of molybdenum and tungsten is 0.6 to 0.68.
Next operation is the sintering green compact.Wherein, sintering process is carried out with a kind of like this method as far as possible, makes sintered body have low porosity, and has the fine grain microstructure.Molybdenum and tungsten is sintering in hydrogen usually, and its dew point is less than 0 ℃.Common sintering temperature is 18000 ℃ to 22000 ℃ with regard to molybdenum, is 21000 ℃ to 27000 ℃ with regard to tungsten.Common sintering time is 1 to 24 hour.Because sintering process is definite by the crystal boundary diffusion, therefore with regard to small particle diameter, can be at lower sintering temperature.Yet particle diameter is also determined half-finished aperture of sintering.For example, if the Fisher particle diameter of used molybdenum powder is reduced to 2.6 μ m from 10 μ m, the aperture can reduce 3 times so.
Yet a shortcoming of fine grain powder is that particularly the ratio of oxygen is higher in adsorbed gas.This is because in sintering process, oxygen and sintering gaseous hydrogen solid/liquid/gas reactions form water vapour.Because the low permeability to gas of green compact, and it further reduces in sintering process, so water vapour can not be removed to suitable degree, particularly from the center of sintered body.When the Fisher particle diameter of used fine grain powder＜4.5 μ m, especially like this.
The high water vapour content of sintered body inside triggers CVT (chemical gaseous phase conveying) reaction.By mass transferring in gas phase, the destruction that CVT reaction causes specific area, and therefore cause being used for the reduction of the driving force of sintering is particularly in the inside of sintered body.With regard to molybdenum and tungsten alloy, this process is strengthened, and the additives in the sintering process discharges a kind of oxygen carrier, and making water vapour form increases AKS-W, Mo-La
2O
3Or W-La
2O
3Situation also be like this.Therefore gas-phase reaction has limited the particularly size of these alloys of sintered body.When using large-sized sintered body or very thin crystal grain powder, the center of accessible sintered density, particularly sintered body is than using little sintered body or low during than corase meal.
After the sintering process, molybdenum, tungsten and their alloy stand mechanical heat treatment usually.Reach minimizing/elimination and the required machinery and the setting of microstructure characteristic of required form, porosity by mechanical heat treatment.Along with the increase of ratio of briquetting, density is increased to solid density and particle diameter reduces.Therefore, the minimizing of particle diameter is decided on selected forming temperature and intermediate annealing temperature consumingly.
Mention that when using the fine grain powder, or alloy is when containing the material that discharges oxygen or water vapour in sintering process, the size of sintered body is restricted.If make the product with large-size by this sintered body, perhaps possible ratio of briquetting is not enough to the center of storage porosity, particularly sintered body.
AKS tungsten as the lamp electrode material also is like this.Short-arc lamp particularly, used anode diameter mostly is 55mm most.What determine the kind electrode life characteristics is their dimensional stability.The distortion of electrode originates from thermal stress.These thermal stress can for example cause generating the protruding place of electrode smooth region.Then, arc light focuses in these protruding places, causes hot-spot.This can cause electrode to melt in this zone.
And hot-spot causes the evaporation of electrode material to increase.The electrode material of evaporation is deposited on the bulb, has therefore reduced luminous flux hastily.
Studies show that creep is the reason that forms protruding place.If this material comprises the hole, because this hole is as vacancy source and cave, so these creeps increase.In addition, heat radiation has been reduced in this hole, the enhancing that it can cause local temperature to rise.
And the fine grain electrode material has long service life.This is attributable to the following fact: with regard to the coarse grain material, infringement is to concentrate on the minority grain boundary, and consequently, because the concentration of arc light, self-reinfocing effect has taken place in the there.
Summary of the invention
Therefore, the purpose of this invention is to provide high density semi-finished product or element, particularly its center also is highdensity, and has the fine grain microstructure.
The method of the feature of this purpose by having claim 1 realizes.
The method according to this invention can be made semi-finished product or element by molybdenum, tungsten and their alloy, and the average relative density of described aluminium, tungsten and their alloy is greater than 98.5%, and core density is greater than 98.3% relatively.Average relative density is interpreted as the averag density with respect to the weight of unit volume.For a person skilled in the art, core density is interpreted as the density of the center of semi-finished product or element.Because core volume is not specific with respect to cumulative volume, core volume is as giving a definition with regard to the determining of core density:
Transverse to deformation direction near 10% of total surface area center * towards the degree of deformation direction.
At deformation state, these semi-finished product or element transverse to the preferred number of die of its deformation direction greater than 100 crystal grain/mm
2
It is commercial molybdenum and the tungsten powder of 0.5 to 10 μ m that the inventive method is used the Fisher particle diameter.
Alloying element can be before reduction process, among or be added in the powder afterwards.This powder for example arrives under the pressing pressure of 500MPa by mold pressing or isostatic cool pressing 100 by common pressing process compacting.
Sintering occurs in 0.55 under the temperature of 0.92 * solidus temperature.Among the present invention, this sintering temperature is chosen such that so that sets 90% to 98.5% sintered density of solid density, and preferably, closed pore is with respect to ratio＞0.8 of total porosity.If relative density surpasses 98.5%, make number of die＞100 particles/mm
2Element or half-finished purpose can not realize.
If rate of closed hole with respect to ratio＞0.8 of total porosity, then can be guaranteed will obtain required characteristic in next step hot-isostatic pressing.If this value is lower than 0.8, then after sintering process, need the forming process of 2%＜＜60%. is defined as follows:
((cross-sectional surface after initial cross sectional surface area one forming process is long-pending)/initial cross sectional surface area) * 100.
This can guarantee to close external holes.
High temperature insostatic pressing (HIP) carries out under situation about not using jar, and carries out under the pressure of the temperature of 0.65 * solidus temperature and 50 to 300MPa 0.40.Be lower than 0.4 * solidus temperature if this temperature is arranged on, can not realize that then element or semi-finished product have the purpose of average relative density＞98.5% and relative core density＞98.3%.Normal or exaggerated grain growth if being arranged on, this temperature be higher than 0.65 * solidus temperature, owing to will exist undesirable grain coarsening phenomenon.Be lower than 50MPa if this pressure is arranged on, can not realize the density purpose equally.When pressure was higher than 300MPa, the inventive method no longer was economically viable.
The high temperature insostatic pressing (HIP) goods stand to be shaped in next step.Wherein ratio of briquetting is 15 to 90%.If this ratio of briquetting is lower than 15%, the purpose of core density＞98.3% can not realize so relatively.If this ratio of briquetting is higher than 90%, according to the present invention, because dense product can also be made without hot-isostatic pressing, this method is not again economically viable.
The inventive method be used to make be used for discharge tube, diameter range is that 15 to 55mm electrode is successful especially.If diameter is lower than 15mm, kind electrode can be made economically by the production method of routine.Higher limit 55mm is got by the watts limit of this fluorescent tube.
The raw material of electrode preferably stands to be shaped by radially casting or rolling.Test shows, the electrode long 20% that the average life span of the electrode of making by the inventive method is made than conventional production method.
Below by an embodiment in detail the present invention is described in detail.
The specific embodiment
Use Fisher particle diameter is that the AKS-W powder of 4.1 μ m is made the AKS-W electrode.Under the pressing pressure of 200MPa, neutralize tight powder, to form green compact by isostatic cool pressing.Under 2250 ℃ temperature, in hydrogen, carry out sintering.The average relative density of the sintered bar of in this way making is measured with buoyancy method, is 92.0%.The ratio of the porosity of remaining silent that records with mercury porosimetry is＞95%.Next step, sintered body under 1750 ℃ temperature, under the pressure of 195MPa, hot-isostatic pressing 3 hours.Relative averag density after the hot-isostatic pressing operation is 97.9%.Subsequently, this sintered bar is radially forming on the casting machine.Ratio of briquetting is 67%.After the forming process, the average relative density of this sintered bar is 99.66%, and core density is 99.63% relatively.Measure the unshaped state and at 1800 ℃ of particle diameters after the annealing 4 hours down.At the unshaped state, the center of this sintered bar and the particle diameter of marginal zone are about 10,000 crystal grain/mm
2In annealed condition, form very compact grained microstructure, the average crystal grain number of the center of sintered bar is 800 crystal grain/mm
2, the marginal zone is 850 crystal grain/mm
2
Made sintered bar has following chemical analysis results: potassium 15 μ g/g, silicon 6 μ g/g, carbon＜5 μ g/g, oxygen 7 μ g/g.
The anode of short-arc lamp that is used for the 2.5kW of movie theatre projection with material manufacturing prepared in accordance with the present invention.Be 2060 hours the average life of determining.Use a material in contrast, this material does not stand hot-isostatic pressing operation compacting subsequently after sintering process, yet other aspects but experience identical production technology.Be 1710 hours the average life that this material might obtain.
Claims (9)
- One kind by average relative density＞98.5%, relatively molybdenum, molybdenum alloy, tungsten or the tungsten alloy material of core density＞98.3% are made the method for semi-finished product or element, it is characterized in that this method comprises following steps at least:Preparation Fisher particle diameter is the powder of 0.5 to 10 μ m;Under the pressure of 500MPa, suppress this powder 100;Is D at 0.55 sintering temperature to 0.92 * solidus temperature to relative density, wherein 90%＜D＜98.5%;0.40 under the temperature of 0.65 * solidus temperature and 50 under the pressure of 300MPa, carry out hot-isostatic pressing under the situation about not using jar;Be shaped with ratio of briquetting , wherein 15%＜＜90%.
- 2. the method for claim 1 is characterized in that, described element or the semi-finished product average crystal grain number＞100 crystal grain/mm under deformation state 2
- 3. method as claimed in claim 1 or 2 is characterized in that, before hot-isostatic pressing, this sintered body stands extra shaping, 2%＜＜60%.
- 4. as the arbitrary described method of claim 1 to 3, it is characterized in that the closed pore of described sintered body is with respect to ratio＞0.8 of total porosity.
- 5. as the arbitrary described method of claim 1 to 4, it is characterized in that described element or semi-finished product are made up of potassium-Doped Tungsten (AKS-W), and potassium content is 5 to 70 μ g/g.
- 6. as the arbitrary described method of claim 1 to 5, it is characterized in that, form, make rod thus by radially casting or rolling.
- 7. method as claimed in claim 6 is characterized in that, this excellent diameter is 15 to 55mm.
- 8. as claim 6 or 7 described methods, it is characterized in that this rod is used to make the lamp electrode.
- 9. method as claimed in claim 8 is characterized in that, this lamp electrode is used for short-arc lamp.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0088805U AT9340U1 (en) | 2005-12-23 | 2005-12-23 | METHOD FOR PRODUCING A HIGH-SEALED SEMI-FINISHED OR COMPONENT |
| ATGM888/2005 | 2005-12-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101007350A true CN101007350A (en) | 2007-08-01 |
| CN101007350B CN101007350B (en) | 2012-07-04 |
Family
ID=37821000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101675743A Active CN101007350B (en) | 2005-12-23 | 2006-12-22 | Method for manufacturing high density semi-products or elements |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20070148031A1 (en) |
| EP (1) | EP1801247B1 (en) |
| JP (1) | JP5265867B2 (en) |
| CN (1) | CN101007350B (en) |
| AT (2) | AT9340U1 (en) |
| DE (1) | DE502006000455D1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101802968B (en) * | 2007-09-21 | 2012-01-11 | 奥斯兰姆有限公司 | Direct-current discharge lamp |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006061375B4 (en) | 2006-12-22 | 2019-01-03 | Osram Gmbh | Mercury high-pressure discharge lamp with an anode containing tungsten and potassium, which has a grain count greater than 200 grains per mm 2 and a density greater than 19.05 g / cm 3 |
| US20090011266A1 (en) * | 2007-07-02 | 2009-01-08 | Georgia Tech Research Corporation | Intermetallic Composite Formation and Fabrication from Nitride-Metal Reactions |
| RU2461910C2 (en) * | 2007-09-21 | 2012-09-20 | Осрам Аг | Gas-discharge direct current lamp |
| DE102008014096A1 (en) * | 2008-03-05 | 2009-09-10 | Osram Gesellschaft mit beschränkter Haftung | Tungsten electrode for high-pressure discharge lamps and high-pressure discharge lamp with a tungsten electrode |
| US9992917B2 (en) | 2014-03-10 | 2018-06-05 | Vulcan GMS | 3-D printing method for producing tungsten-based shielding parts |
| CN105478772B (en) * | 2014-09-15 | 2018-12-04 | 安泰科技股份有限公司 | A kind of manufacturing method of molybdenum planar targets |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3649224A (en) * | 1968-04-18 | 1972-03-14 | Sylvania Electric Prod | Method of making nonsag filaments for electric lamps |
| US4066449A (en) * | 1974-09-26 | 1978-01-03 | Havel Charles J | Method for processing and densifying metal powder |
| US4244738A (en) * | 1978-03-24 | 1981-01-13 | Samuel Storchheim | Method of and apparatus for hot pressing particulates |
| JPS59205404A (en) * | 1983-05-06 | 1984-11-21 | Daido Steel Co Ltd | Powder solidifying method |
| JPH0445234A (en) * | 1990-06-12 | 1992-02-14 | Tokyo Tungsten Co Ltd | Manufacture of tungsten bar stock |
| US5306569A (en) * | 1990-06-15 | 1994-04-26 | Hitachi Metals, Ltd. | Titanium-tungsten target material and manufacturing method thereof |
| US6203753B1 (en) * | 1996-05-13 | 2001-03-20 | The Presmet Corporation | Method for preparing high performance ferrous materials |
| DE19738574A1 (en) * | 1997-09-04 | 1999-03-11 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Electrode and method and apparatus for making the same |
| JP4213831B2 (en) * | 1999-08-20 | 2009-01-21 | 株式会社ユメックス | Short arc lamp |
| JP3721014B2 (en) * | 1999-09-28 | 2005-11-30 | 株式会社日鉱マテリアルズ | Method for manufacturing tungsten target for sputtering |
| US7718117B2 (en) * | 2000-09-07 | 2010-05-18 | Kabushiki Kaisha Toshiba | Tungsten sputtering target and method of manufacturing the target |
| JP4659278B2 (en) * | 2001-06-18 | 2011-03-30 | 株式会社アライドマテリアル | Tungsten sintered body and manufacturing method thereof, tungsten plate material and manufacturing method thereof |
| JP4263098B2 (en) * | 2001-10-09 | 2009-05-13 | 株式会社東芝 | Tungsten wire and cathode heater and filament for vibration-proof bulb |
| US20030211001A1 (en) * | 2002-05-13 | 2003-11-13 | Advanced Materials Products, Inc. | Manufacture of near-net shape titanium alloy articles from metal powders by sintering at variable pressure |
| AT6240U1 (en) * | 2002-06-12 | 2003-06-25 | Plansee Ag | ELECTRODE FOR HIGH PRESSURE DISCHARGE LAMP |
| US20070172378A1 (en) * | 2004-01-30 | 2007-07-26 | Nippon Tungsten Co., Ltd. | Tungsten based sintered compact and method for production thereof |
-
2005
- 2005-12-23 AT AT0088805U patent/AT9340U1/en not_active IP Right Cessation
-
2006
- 2006-12-18 AT AT06026181T patent/ATE389040T1/en not_active IP Right Cessation
- 2006-12-18 EP EP06026181A patent/EP1801247B1/en not_active Not-in-force
- 2006-12-18 DE DE502006000455T patent/DE502006000455D1/en active Active
- 2006-12-21 JP JP2006344389A patent/JP5265867B2/en active Active
- 2006-12-22 CN CN2006101675743A patent/CN101007350B/en active Active
- 2006-12-26 US US11/645,836 patent/US20070148031A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101802968B (en) * | 2007-09-21 | 2012-01-11 | 奥斯兰姆有限公司 | Direct-current discharge lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| AT9340U1 (en) | 2007-08-15 |
| DE502006000455D1 (en) | 2008-04-24 |
| JP2007169789A (en) | 2007-07-05 |
| JP5265867B2 (en) | 2013-08-14 |
| US20070148031A1 (en) | 2007-06-28 |
| CN101007350B (en) | 2012-07-04 |
| EP1801247A1 (en) | 2007-06-27 |
| EP1801247B1 (en) | 2008-03-12 |
| ATE389040T1 (en) | 2008-03-15 |
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