EP1195214B1 - Metal-made seamless pipe and process for production thereof - Google Patents

Metal-made seamless pipe and process for production thereof Download PDF

Info

Publication number
EP1195214B1
EP1195214B1 EP01308458A EP01308458A EP1195214B1 EP 1195214 B1 EP1195214 B1 EP 1195214B1 EP 01308458 A EP01308458 A EP 01308458A EP 01308458 A EP01308458 A EP 01308458A EP 1195214 B1 EP1195214 B1 EP 1195214B1
Authority
EP
European Patent Office
Prior art keywords
metal
pipe
melting point
made seamless
seamless pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP01308458A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1195214A1 (en
Inventor
Norikazu c/o NGK Insulators Ltd Niimi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NGK Insulators Ltd
Original Assignee
NGK Insulators Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26344945&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1195214(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from PCT/JP2000/006876 external-priority patent/WO2002028575A1/ja
Priority claimed from JP2001217592A external-priority patent/JP2002180106A/ja
Application filed by NGK Insulators Ltd filed Critical NGK Insulators Ltd
Publication of EP1195214A1 publication Critical patent/EP1195214A1/en
Application granted granted Critical
Publication of EP1195214B1 publication Critical patent/EP1195214B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
    • C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
    • C22C32/0031—Matrix based on refractory metals, W, Mo, Nb, Hf, Ta, Zr, Ti, V or alloys thereof
    • 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
    • B22F3/10—Sintering only
    • B22F3/11—Making porous workpieces or articles
    • B22F3/1103—Making porous workpieces or articles with particular physical characteristics
    • 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
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • B22F5/106—Tube or ring forms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors

Definitions

  • the present invention relates to a metal-made seamless pipe and a process for producing such a pipe. More particularly, the present invention relates to a metal-made seamless pipe which is low in processability but can be produced in a small thickness and a small inner diameter, which is superior in mechanical strengths and gastightness, and which can be suitably used, for example, as a sealing member of a translucent vessel (e.g. a ceramic-made translucent vessel) of, for example, a high-pressure discharge lamp (e.g. a metal halide lamp); as well as to a process for producing such a metal-made seamless pipe.
  • a translucent vessel e.g. a ceramic-made translucent vessel
  • a high-pressure discharge lamp e.g. a metal halide lamp
  • a translucent ceramic pipe 20 (a translucent pipe) is used as a translucent vessel of a high-pressure discharge lamp 10 (e.g. a metal halide lamp), because the translucent vessel contains a light emitting material (e.g. dysprosium iodide) of high corrosivity and accordingly requires corrosion resistance.
  • a high-pressure discharge lamp 10 e.g. a metal halide lamp
  • a metal-made pipe 30 e.g. a Mo pipe
  • European Patent Publication EP 0982278A1 European Patent Publication EP 0982278A1
  • the metal (e.g. Mo or W) used in such a metal-made pipe is generally low in processability and there has been a limit in producing the pipe in a small thickness and a small inner diameter.
  • the object of the present invention is to provide a metal-made seamless pipe which is low in processability but can be produced in a small thickness and a small inner diameter, which is superior in mechanical strengths and gastightness, and which can be suitably used, for example, as a sealing member of a translucent vessel (e.g. a ceramic-made translucent vessel) of, for example, a high-pressure discharge lamp (e.g. a metal halide lamp); and a process for producing such a metal-made seamless pipe.
  • a translucent vessel e.g. a ceramic-made translucent vessel
  • a high-pressure discharge lamp e.g. a metal halide lamp
  • the present invention provides a metal-made seamless pipe as set out in claim 1, and a process for production thereof as set out in claim 4.
  • the metals contained in the pipe each having a melting point of 2,600°C or more and are selected from Mo, W and Re.
  • the pipe further contains, in addition to the metal, at least one kind of oxide selected from the group consisting of Al 2 O 3 , Y 2 O 3 Dy 2 O 3 , Gd 2 O 3 , Ho 2 O 3 and Tm 2 O 3 , in an amount of 0.02 to 5% by volume relative to 100% of the total of the metal and the oxide.
  • at least one kind of oxide selected from the group consisting of Al 2 O 3 , Y 2 O 3 Dy 2 O 3 , Gd 2 O 3 , Ho 2 O 3 and Tm 2 O 3 , in an amount of 0.02 to 5% by volume relative to 100% of the total of the metal and the oxide.
  • At least one kind of oxide selected from the group consisting of Al 2 O 3 , Y 2 O 3 , Dy 2 O 3 , Gd 2 O 3 , Ho 2 O 3 and Tm 2 O 3 , in an amount of 0.02 to 5% by volume relative to 100% of the total of the metal and the oxide.
  • Preferably drying of the pipe-shaped material is conducted in an atmosphere containing the vapor of the solvent.
  • the metal-made seamless pipe of the present invention contains, as a main component, at least one kind of metal selected from the group consisting of metals each having a melting point of 1,600°C or more, and has a porosity of 0.3 to 25% when the porosity is defined as an areal proportion of the open pores not perforating in the thickness direction of the pipe, present at the outer surface of the pipe, to the total area (100%) of the outer surface of the pipe.
  • the metal-made seamless pipe of the present invention has higher reliability to leak-free (breakage) than pipes having seams, because it has no seam.
  • a metal-made pipe having a seam is used as a sealing member for translucent vessel of high-pressure discharge lamp (e.g. metal halide lamp)
  • leakage (breakage) tends to occur therefrom because the translucent vessel inside becomes several atm. during the operation of the tube, resulting in lower reliability than in the case of seamless pipe.
  • the kind of the metal having a melting point of 1,600° C or more used in the present invention, there is no particular restriction.
  • the metal there can be mentioned at least one kind of metal selected from Mo (melting point: 2,623°C), W (melting point: 3,422°C), Re (melting point: 3,186°C), Ti (melting point: 1,668°C), Hf (melting point: 2,233°C) and Zr (melting point: 1,855°C), all having corrosion resistance to the substance sealed into translucent vessel.
  • Mo and W have a body-centered cubic crystal structure, have a high melting point as mentioned above, and have a very high Vickers hardness of 200 to 450.
  • Re, Ti, Hf and Zr have a close-packed cubic crystal structure, have a high melting point, and are low in crystal slip. Therefore, these metals are very low in processability.
  • open pores other than through-pores refer to pipe-surface pores not perforating (not causing leakage) in the thickness direction of pipe. Such open pores can be confirmed by conducting a He leakage test and making an image analysis for outer surface porosity.
  • gastightness is measured by fitting a metal-made pipe of 1 mm in outer diameter, 0.7 mm in inner diameter (therefore, 0.3 mm in thickness) and 100 mm in length to a He detector. When the pipe sample number is 10 and all the samples are gastight, the gastightness of the pipe is taken as 100%. “Gastight” refers to that in the He leakage test, the leakage rate is 1.0x10 -10 atm.cc/sec or less.
  • the lower limit of the outer surface porosity is determined by the wettability toward other substance, particularly, cement, ceramic, glass or the like. A lower limit smaller than 0.3% is not preferred as is clear from the results of the following peeling test.
  • a thin W plate 3 was attached to an alumina plate 1 via an Al 2 O 3 -Y 2 O 3 -Dy 2 O 3 -La 2 O 3 type ceramic composition; the thin W plate 3 was peeled from the alumina plate 1; the sites of breakage and the evaluations are shown in Table 1.
  • Site of breakage Evaluation Porosity of thin W plate (%) 0.1 Thin W plate surface No breakage of ceramic ⁇ 0.2 Thin W plate surface No breakage of ceramic ⁇ 0.3-0.5 Thin W plate surface Ceramic on W plate: small ⁇ 1.0 Ceramic on W plate: small to medium ⁇ - ⁇ 3.0 Ceramic on W plate: medium ⁇ 5.0 Ceramic on W plate: large ⁇
  • the metal-made seamless pipe of the present invention preferably has an inner diameter of 0.4 to 3.0 mm and a thickness of 0.05 to 1.0 mm.
  • the inner diameter is 3 mm and the thickness is 0.05 mm
  • the inner diameter is too large and no sufficient increase in density takes place during molding; thus, leakage occurs when the thickness is as small as 0.05 mm.
  • the thickness is too large and non-uniformity in drying speed arises after molding; as a result, drying cracks (microcracks) appear and leakage is incurred.
  • the metal-made seamless pipe of the present invention further contains, in addition to the metal, at least one kind of oxide selected from the group consisting of Al 2 O 3 , Y 2 O 3 , Dy 2 O 3 , Gd 2 O 3 , Ho 2 O 3 and Tm 2 O 3 , in an amount of 0.02 to 5% by volume, preferably 0.05 to 2% by volume relative to 100% of the total of the metal and the oxide, for improvement in strength.
  • the amount of the oxide is less than 0.02% by volume, the effect of strength improvement is low.
  • the amount of the oxide is more than 5% by volume, adverse effects such as reduction in gastightness, brittleness and the like may appear.
  • Al 2 O 3 is preferred for the corrosion resistance.
  • the process for producing a metal-made seamless pipe comprises preparing a mixture containing (1) 80 to 98% by weight of a powder of at least one kind of metal selected from the group consisting of metals each having a melting point of 1,600°C or more and (2) a binder in a solvent; kneading the mixture for 0 to 3 hours, preferably 1 to 2 hours and then extruding the kneaded material to form a pipe-shaped material; drying the pipe-shaped material at -5 to 25°C (preferably -2 to 15°C) for 10 hours (shortest) to 48 hours (preferably 24 hours) (longest) from the completion of the extrusion and thereafter at 30 to 120°C, preferably 80 to 100°C for 0 to 8 hours, preferably 0.5 to 4 hours; then, firing the dried material at a lower temperature selected from a temperature between 1,000 to 2,100°C and a temperature lower by 300°C than the melting point of the metal.
  • the preparation of the mixture there is no particular restriction.
  • this step when the content of the metal powder is less than 80% by weight, drying cracks may appear; when the content of the metal powder is more than 98% by weight, the dispersion of the metal particles may be insufficient.
  • the firing in the firing step is conducted in a non-oxidizing atmosphere or in vacuum.
  • a lower temperature selected from 1,000°C and a temperature lower by 300°C than the melting point of the metal insufficient sintering may take place; when the firing temperature is higher than a lower temperature selected from 2,100°C and a temperature lower by 300°C than the melting point of the metal, firing deformation may take place depending upon the kind of the metal used.
  • the drying of the pipe-shaped material is preferably conducted in an atmosphere containing the vapor of the solvent used in the mixture.
  • the mixture was molded by an extruder.
  • the extrudate was dried in the air at 80°C for 2 hours.
  • the dried material was fired in hydrogen at 1,900°C for 3 hours. To remove the binder while preventing the oxidation of Mo, moistening was made to obtain a dew point of 0°C.
  • the present invention can provide a metal-made seamless pipe which is low in processability but can be produced in a small thickness and a small inner diameter, which is superior in mechanical strengths and gastightness, and which can be suitably used, for example, as a sealing member of a translucent vessel (e.g. a ceramic-made translucent vessel) of, for example, a high-pressure discharge lamp (e.g. a metal halide lamp); and a process for producing such a metal-made seamless pipe.
  • the metal-made seamless pipe of the present invention can preferably be used suitably particularly as a sealing member of translucent pipe of, for example, high-pressure discharge lamp (e.g. ceramic-made metal halide lamp).
  • the present metal-made seamless pipe can also be used suitably as a metal pipe produced from a metal of low processability and having a small thickness and a small inner diameter, high heat resistance, high mechanical strengths and superior gastightness, for example, a fine pipe of, for example, heat exchangers used in extreme situations such as space, aviation, military and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Powder Metallurgy (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Ceramic Products (AREA)
EP01308458A 2000-10-03 2001-10-03 Metal-made seamless pipe and process for production thereof Revoked EP1195214B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
PCT/JP2000/006876 WO2002028575A1 (fr) 2000-10-03 2000-10-03 Tube metallique sans soudure et son procede de production
WOPCT/JP00/06876 2000-10-03
JP2001217592 2001-07-18
JP2001217592A JP2002180106A (ja) 2000-10-03 2001-07-18 金属製シームレスパイプ及びその製造方法

Publications (2)

Publication Number Publication Date
EP1195214A1 EP1195214A1 (en) 2002-04-10
EP1195214B1 true EP1195214B1 (en) 2004-12-22

Family

ID=26344945

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01308458A Revoked EP1195214B1 (en) 2000-10-03 2001-10-03 Metal-made seamless pipe and process for production thereof

Country Status (4)

Country Link
EP (1) EP1195214B1 (zh)
CN (1) CN1151539C (zh)
CZ (1) CZ296639B6 (zh)
DE (1) DE60107914T2 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004015467B4 (de) 2004-03-26 2007-12-27 W.C. Heraeus Gmbh Elektrodensystem mit einer Stromdurchführung durch ein Keramikbauteil
US7453212B2 (en) 2005-01-31 2008-11-18 Osram Sylvania Inc. Ceramic discharge vessel having tungsten alloy feedthrough
DE102012217191A1 (de) 2012-09-24 2014-03-27 Siemens Aktiengesellschaft Herstellen eines Refraktärmetall-Bauteils
CN107236888B (zh) * 2017-06-13 2018-03-13 利胜强 一种助燃合金、水蒸气参与燃烧的方法及锅炉燃烧系统
CN108746234A (zh) * 2018-06-27 2018-11-06 唐竹胜 一种管柱状机械零部件的生产方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3626744A (en) * 1969-08-28 1971-12-14 Minnesota Mining & Mfg Smooth high tolerance porous tube and process for making
JPS597762B2 (ja) * 1981-03-28 1984-02-21 マイクロフイルタ−株式会社 多孔質シ−ムレスパイプの製造方法
JP3547262B2 (ja) * 1996-07-25 2004-07-28 セイコーエプソン株式会社 バッカルチューブ及びバッカルチューブの製造方法
JP3450751B2 (ja) * 1998-08-26 2003-09-29 日本碍子株式会社 接合体、高圧放電灯およびその製造方法

Also Published As

Publication number Publication date
CN1151539C (zh) 2004-05-26
CN1347135A (zh) 2002-05-01
DE60107914T2 (de) 2005-12-15
CZ20013545A3 (cs) 2002-05-15
CZ296639B6 (cs) 2006-05-17
EP1195214A1 (en) 2002-04-10
DE60107914D1 (de) 2005-01-27

Similar Documents

Publication Publication Date Title
EP0660810B1 (en) Sealing members for alumina arc tubes and method of making the same
US7771506B2 (en) Spongy sintered article of titanium or titanium alloy exhibiting excellent compression strength
US7547408B1 (en) Process for reducing non-uniformities in the density of sintered materials
US6447626B1 (en) Method for producing joined body of ALN substrates and joining agent used for the joining
FI93590C (fi) Menetelmä sintratun uraanidioksidikappaleen valmistamiseksi
US6596100B2 (en) Metal-made seamless pipe and process for production thereof
EP2918554A1 (en) Molten glass conveying equipment element, method for manufacturing molten glass conveying equipment element, glass manufacturing apparatus comprising molten glass conveying equipment element and method for manufacturing glass product
EP1195214B1 (en) Metal-made seamless pipe and process for production thereof
JP5406727B2 (ja) 粉末冶金法による高い固相線温度を有する耐火セラミックス材料の製造方法
US5680291A (en) Low-temperature sinterable dielectric composition with high dielectric constant and multi-layered ceramic capacitor using the same
US7132798B2 (en) Joined bodies, high pressure discharge lamps and assemblies therefor
EP2000447A2 (en) Sintered body, light emitting tube and process for manufacturing the same
Vasilos et al. Pressure sintering of ceramics
EP2210867B1 (en) Honeycomb structure and purification device using the honeycomb structure
JP3350203B2 (ja) 固体電解質型燃料電池セル
JP2002180106A (ja) 金属製シームレスパイプ及びその製造方法
EP0762922A1 (en) Metal filter for high temperature applications
EP1170770B1 (en) Joined bodies and high-pressure discharge lamps
EP0419150A2 (en) Sintered ceramic composite body and method of manufacturing same
JPH09139220A (ja) 固体電解質型電気化学セルの基体材
CN114642920A (zh) 一种无支撑型金属多孔滤管及其制备方法
JPH06271353A (ja) 耐火物製造用素材
JPH11228236A (ja) セラミック焼成用付着防止材並びにセラミック焼結体の製造方法
JPH07172958A (ja) 表面被覆窒化珪素質耐熱部材
JPH08208319A (ja) 熱電対保護管用アルミナ焼結体とその製造方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR GB NL

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20020718

17Q First examination report despatched

Effective date: 20020925

AKX Designation fees paid

Free format text: BE DE FR GB NL

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB NL

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60107914

Country of ref document: DE

Date of ref document: 20050127

Kind code of ref document: P

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

26 Opposition filed

Opponent name: PLANSEE AKTIENGESELLSCHAFT

Effective date: 20050922

ET Fr: translation filed
PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

NLR1 Nl: opposition has been filed with the epo

Opponent name: PLANSEE AKTIENGESELLSCHAFT

R26 Opposition filed (corrected)

Opponent name: PLANSEE GMBH

Effective date: 20050922

PLAF Information modified related to communication of a notice of opposition and request to file observations + time limit

Free format text: ORIGINAL CODE: EPIDOSCOBS2

NLR1 Nl: opposition has been filed with the epo

Opponent name: PLANSEE GMBH

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

R26 Opposition filed (corrected)

Opponent name: PLANSEE SE

Effective date: 20050922

NLR1 Nl: opposition has been filed with the epo

Opponent name: PLANSEE SE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20060915

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20060921

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20061031

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20061103

Year of fee payment: 6

RDAF Communication despatched that patent is revoked

Free format text: ORIGINAL CODE: EPIDOSNREV1

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 20070308

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state

Free format text: 20070308

NLR2 Nl: decision of opposition

Effective date: 20070308

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20061003

Year of fee payment: 6