WO2007114173A1 - 高合金圧延用マンドレルバー、その表面処理方法および製造方法、ならびに継目無鋼管製造装置の操業方法 - Google Patents
高合金圧延用マンドレルバー、その表面処理方法および製造方法、ならびに継目無鋼管製造装置の操業方法 Download PDFInfo
- Publication number
- WO2007114173A1 WO2007114173A1 PCT/JP2007/056676 JP2007056676W WO2007114173A1 WO 2007114173 A1 WO2007114173 A1 WO 2007114173A1 JP 2007056676 W JP2007056676 W JP 2007056676W WO 2007114173 A1 WO2007114173 A1 WO 2007114173A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rolling
- mandrel bar
- steel
- high alloy
- mandrel
- Prior art date
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 64
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 56
- 239000010959 steel Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 30
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 25
- 239000000956 alloy Substances 0.000 title claims abstract description 25
- 238000004381 surface treatment Methods 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 28
- 238000005098 hot rolling Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 16
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 11
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 17
- 239000000463 material Substances 0.000 description 8
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 230000003746 surface roughness Effects 0.000 description 3
- 229910001315 Tool steel Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 210000001331 nose Anatomy 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002335 surface treatment layer Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
- B21B17/04—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length in a continuous process
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
- B21B25/04—Cooling or lubricating mandrels during operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S72/00—Metal deforming
- Y10S72/70—Deforming specified alloys or uncommon metal or bimetallic work
Definitions
- the present invention relates to a mandrel bar, a surface treatment method and a production method thereof, and an operation method of a seamless steel pipe production apparatus.
- Mandrel mill rolling is one of the processes for producing a seamless steel pipe hot.
- the raw tube is rolled by applying a feed in the axial direction while being restrained by a mandrel bar and a multi-stand perforated roll.
- a mandrel bar is provided with a lubricating film mainly composed of a solid lubricant.
- the mandrel bar and the inner surface of the blank tube are in a severe sliding friction state, it is not easy to maintain a completely lubricated state. For this reason, the mandrel bar is subject to surface damage such as repeated wear, seizure, rough skin, cracks, etc., and its life is reached.
- a mandrel bar generally used is a tool steel for hot working such as SKD6, SKD61, etc., which has been hardened and tempered to adjust the hardness and to provide scale to the surface.
- Patent Document 1 states that "a hot seamless characterized by having a nitriding layer having an axial centerline average roughness of 0.5 to 5.0 m on the surface of the base material. Mandrel for pipe manufacturing "Luba 1" has been proposed.
- Patent Document 2 states that “the surface of a mandrel formed into a perforated shape for seamless steel pipe rolling is subjected to a diffusion permeation of Cu, Zn, A1 metal or an alloy thereof, and the surface grain boundary. After embrittlement of the part, it is subjected to tempering heat treatment or high temperature rapid heating at the initial stage of pipe rolling to generate fine turtle-shell-like surface microcracks in the grain boundary embrittled part. Producing method of drilling mandrel for seamless steel pipe rolling! Speak.
- Patent Document 1 Japanese Patent Laid-Open No. 6-262220
- Patent Document 2 JP-A-6-339709
- Patent Document 2 The method of Patent Document 2 is not linked to full-scale practical application because of fear of breakage.
- the present invention has been made to solve the above-described problem, and is a mandrel bar for high alloy rolling having excellent seizure resistance and service life (manufacturing a seamless steel pipe by a Mannesmann-mandrel mill method). It is an object of the present invention to provide a surface treatment method and a production method for a mandrel bar used in the above. It is another object of the present invention to provide a method of operating a seamless steel pipe manufacturing apparatus that can be carried out under conditions in which neither ordinary steel rolling nor high alloy steel rolling is seized.
- the present invention relates to a surface treatment method for a high alloy rolling mandrel bar shown in the following (1), a method for producing a high alloy rolling mandrel bar shown in the following (2), and a seamless steel pipe production shown in the following (3).
- the summary is the method of operating the device.
- a mandrel bar for rolling a high alloy characterized in that after the heat treatment by scaling the mandrel bar, ordinary steel having a Cr content of 8% or less is rolled for 50 passes or more.
- a mandrel bar for high alloy rolling having excellent seizure resistance and service life can be produced.
- This mandrel bar for high alloy rolling is particularly useful for producing seamless steel pipes by mandrel mill rolling of stainless steel under strict rolling conditions such as 13% Cr steel.
- both the rolling of ordinary steel and the rolling of high alloy steel can be performed under the condition that no seizure occurs. Also Since the life of the mandrel bar is extended, the effort for changing the setup is reduced and the manufacturing cost is reduced.
- the mandrel bar for high alloy rolling of the present invention for example, externally cuts a base material made of an alloy tool steel such as SKD6, SKD61, etc., then performs polishing or shot processing, and further performs surface treatment. Manufactured. It is common to perform quenching at 950 to 1050 ° C and tempering at 600 to 750 ° C before external cutting.
- the surface treatment is performed by performing a scale heat treatment on the mandrel bar and then rolling a plain steel having a Cr content of 8% or less for 50 passes or more.
- the surface roughness of the base material before the surface treatment is desirably in the range of 0.2 to 4.0.
- the reason why the mandrel bar is subjected to the heat treatment for scaling is to adhere the scale to the bar surface and to prevent the bar metal part from being exposed during the rolling of the plain steel mainly having a Cr content of 8% or less. .
- the heat treatment temperature is preferably in the range of 550 to 750 ° C.
- the heat treatment time is desirably in the range of 1 to 15 hours.
- Steel group A Plain steel with Cr content of less than 0.5%
- Steel Group B Plain steel with Cr content of 0.5% or more and less than 5.0%
- Steel group C Plain steel with Cr content of 5.0% or more and 8%
- rolling of ordinary steel having a Cr content of 8% or less and rolling of high alloy steel may be performed continuously, or a mandrel obtained by rolling ordinary steel for 50 passes or more. You can stock the bar and then use it to roll high alloy steel!
- the hardness was adjusted to 50 to 55 with a Shore hardness Hs by heat treatment. This was cut to an outer diameter of 134 mm to obtain a mandrel bar.
- a mandrel mill that forms an uncoated pipe with an outer diameter of 181 ⁇ , a wall thickness of 17.5mmt, and a length of 7000mmL into a square steel pipe with an outer diameter of 147 ⁇ , a wall thickness of 6.5mmt, and a length of 21000mmL Rolled.
- ordinary steel, alloy steel and high alloy steel shown in Table 1 were used.
- Numberer of passes that can be rolled in Table 1 means the number of passes from the start of rolling of high alloy steel to the occurrence of problems such as vibration during rolling and defective stripping.
- a high alloy rolling mandrel having excellent seizure resistance and service life can be produced.
- This high alloy rolling mandrel bar is especially It is useful for producing seamless steel pipes by mandrel mill rolling of stainless steels under severe rolling conditions. Further, according to the operation method of the seamless steel pipe manufacturing apparatus of the present invention, both the rolling of ordinary steel and the rolling of high alloy steel can be performed under the condition that no seizure occurs. In addition, since the life of the mandrel bar is extended, the trouble of changing the setup is reduced and the manufacturing cost is reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800082974A CN101400455B (zh) | 2006-03-28 | 2007-03-28 | 高合金轧制用芯棒、其表面处理方法及制造方法和无缝钢管制造装置的操作方法 |
EP07740114.9A EP2008731B1 (en) | 2006-03-28 | 2007-03-28 | Method for surface treatment of a mandrel bar |
JP2008508566A JP4900385B2 (ja) | 2006-03-28 | 2007-03-28 | 高合金圧延用マンドレルバー、その表面処理方法および製造方法、ならびに継目無鋼管製造装置の操業方法 |
US12/236,970 US8065901B2 (en) | 2006-03-28 | 2008-09-24 | Mandrel bar for high-alloy rolling, method for surface treating a mandrel bar, method for producing mandrel bar, and method for operating seamless pipe mill |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006088513 | 2006-03-28 | ||
JP2006-088513 | 2006-03-28 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/236,970 Continuation US8065901B2 (en) | 2006-03-28 | 2008-09-24 | Mandrel bar for high-alloy rolling, method for surface treating a mandrel bar, method for producing mandrel bar, and method for operating seamless pipe mill |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007114173A1 true WO2007114173A1 (ja) | 2007-10-11 |
Family
ID=38563441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/056676 WO2007114173A1 (ja) | 2006-03-28 | 2007-03-28 | 高合金圧延用マンドレルバー、その表面処理方法および製造方法、ならびに継目無鋼管製造装置の操業方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8065901B2 (ja) |
EP (1) | EP2008731B1 (ja) |
JP (1) | JP4900385B2 (ja) |
CN (1) | CN101400455B (ja) |
WO (1) | WO2007114173A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102069345B (zh) * | 2009-11-25 | 2012-12-12 | 宝山钢铁股份有限公司 | 大规格钢管限动芯棒制造方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102240889B (zh) * | 2011-05-03 | 2012-11-21 | 天津钢管集团股份有限公司 | 生产连轧无缝钢管的空心芯棒的制造方法 |
CN102327898B (zh) * | 2011-09-06 | 2013-07-03 | 天津钢管集团股份有限公司 | 评估空心芯棒厚壁减薄可靠性的方法 |
WO2013153878A1 (ja) * | 2012-04-11 | 2013-10-17 | 新日鐵住金株式会社 | 穿孔機に用いられるプラグ及びプラグの再生方法 |
DE102014100107B4 (de) | 2014-01-07 | 2016-11-17 | Vallourec Deutschland Gmbh | Walzstange als Innenwerkzeug beim Herstellen von nahtlosen metallischen Hohlkörpern und Verfahren zur Herstellung eines metallischen Hohlkörpers |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01170502A (ja) * | 1987-12-25 | 1989-07-05 | Nippon Steel Corp | 鋼管圧延用マンドレルバーの処理方法 |
JPH06262220A (ja) | 1993-03-12 | 1994-09-20 | Sumitomo Metal Ind Ltd | 熱間継目無管製造用マンドレルバー |
JPH06339709A (ja) | 1993-05-31 | 1994-12-13 | Nippon Steel Corp | 継目無鋼管圧延用穿孔マンドレルの製造法 |
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JPS5819363B2 (ja) * | 1977-07-09 | 1983-04-18 | 新日本製鐵株式会社 | 継目無鋼管穿孔機又は圧延機用の芯金 |
JPS6035206B2 (ja) * | 1980-12-19 | 1985-08-13 | 日本鋼管株式会社 | 継目無鋼管製造法 |
JPS63235491A (ja) * | 1987-03-23 | 1988-09-30 | Sumitomo Metal Ind Ltd | 熱間押出用工具の製造方法 |
JPS63238909A (ja) * | 1987-03-27 | 1988-10-05 | Sumitomo Metal Ind Ltd | 継目無管の製造方法 |
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JPH02255204A (ja) * | 1989-03-29 | 1990-10-16 | Sumitomo Metal Ind Ltd | 鋼管製造用穿孔及び圧延用プラグ |
JP2576254B2 (ja) * | 1990-02-15 | 1997-01-29 | 住友金属工業株式会社 | 超微細組織を有する継目無鋼管の製造法 |
US5218851A (en) * | 1991-06-21 | 1993-06-15 | Kawasaki Steel Corporation | Mandrel mill capable of preventing stripping miss |
JP2897664B2 (ja) * | 1994-12-14 | 1999-05-31 | 住友金属工業株式会社 | 熱間継目無管圧延用マンドレルバー |
JP3419126B2 (ja) * | 1995-01-24 | 2003-06-23 | 住友金属工業株式会社 | 熱間継目無管圧延用マンドレルバーおよびその製造方法 |
JP3240921B2 (ja) * | 1996-04-25 | 2001-12-25 | 日産自動車株式会社 | ショックアブソーバのマウント構造 |
JP3269447B2 (ja) * | 1998-02-16 | 2002-03-25 | 住友金属工業株式会社 | 熱間継目無鋼管製造用マンドレルバーの寿命向上方法 |
JP3562353B2 (ja) * | 1998-12-09 | 2004-09-08 | 住友金属工業株式会社 | 耐硫化物応力腐食割れ性に優れる油井用鋼およびその製造方法 |
JP3348670B2 (ja) * | 1999-02-24 | 2002-11-20 | 住友金属工業株式会社 | マンドレルミル圧延方法 |
JP3395715B2 (ja) * | 1999-06-14 | 2003-04-14 | 住友金属工業株式会社 | 熱間継目無管製造用マンドレルバーおよび熱間継目無管の製造方法 |
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JP4315155B2 (ja) * | 2003-05-21 | 2009-08-19 | 住友金属工業株式会社 | 継目無管の製造方法 |
JP4314884B2 (ja) * | 2003-05-22 | 2009-08-19 | 住友金属工業株式会社 | 熱間継目無管圧延用マンドレルバー |
JP4196990B2 (ja) * | 2003-06-04 | 2008-12-17 | 住友金属工業株式会社 | 熱間継目無製管用Crめっきマンドレルバーおよびその製造方法 |
BRPI0608086A2 (pt) * | 2005-02-16 | 2009-11-10 | Sumitomo Metal Ind | método para fabricar um tubo de aço sem costura |
-
2007
- 2007-03-28 WO PCT/JP2007/056676 patent/WO2007114173A1/ja active Application Filing
- 2007-03-28 EP EP07740114.9A patent/EP2008731B1/en not_active Expired - Fee Related
- 2007-03-28 CN CN2007800082974A patent/CN101400455B/zh not_active Expired - Fee Related
- 2007-03-28 JP JP2008508566A patent/JP4900385B2/ja active Active
-
2008
- 2008-09-24 US US12/236,970 patent/US8065901B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01170502A (ja) * | 1987-12-25 | 1989-07-05 | Nippon Steel Corp | 鋼管圧延用マンドレルバーの処理方法 |
JPH06262220A (ja) | 1993-03-12 | 1994-09-20 | Sumitomo Metal Ind Ltd | 熱間継目無管製造用マンドレルバー |
JPH06339709A (ja) | 1993-05-31 | 1994-12-13 | Nippon Steel Corp | 継目無鋼管圧延用穿孔マンドレルの製造法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2008731A4 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102069345B (zh) * | 2009-11-25 | 2012-12-12 | 宝山钢铁股份有限公司 | 大规格钢管限动芯棒制造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP2008731A1 (en) | 2008-12-31 |
CN101400455A (zh) | 2009-04-01 |
JPWO2007114173A1 (ja) | 2009-08-13 |
US20090071221A1 (en) | 2009-03-19 |
JP4900385B2 (ja) | 2012-03-21 |
US8065901B2 (en) | 2011-11-29 |
CN101400455B (zh) | 2010-09-01 |
EP2008731B1 (en) | 2014-06-25 |
EP2008731A4 (en) | 2012-10-03 |
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