WO2011071033A1 - 焼結摺動部材 - Google Patents
焼結摺動部材 Download PDFInfo
- Publication number
- WO2011071033A1 WO2011071033A1 PCT/JP2010/071879 JP2010071879W WO2011071033A1 WO 2011071033 A1 WO2011071033 A1 WO 2011071033A1 JP 2010071879 W JP2010071879 W JP 2010071879W WO 2011071033 A1 WO2011071033 A1 WO 2011071033A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sliding member
- resistance
- sintered sliding
- boron nitride
- sintered
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
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- 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
- C22C1/0433—Nickel- or cobalt-based alloys
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- 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
- C22C1/08—Alloys with open or closed pores
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/002—Alloys based on nickel or cobalt with copper as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
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- 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
- C22C32/0047—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 carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0068—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 carbides, nitrides, borides or silicides as the main non-metallic constituents only nitrides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F16C33/121—Use of special materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/52—Alloys based on nickel, e.g. Inconel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2220/00—Shaping
- F16C2220/20—Shaping by sintering pulverised material, e.g. powder metallurgy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/40—Application independent of particular apparatuses related to environment, i.e. operating conditions
- F16C2300/54—Application independent of particular apparatuses related to environment, i.e. operating conditions high-temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/22—Internal combustion engines
Definitions
- the present invention relates to a sintered sliding member having excellent heat resistance, corrosion resistance and wear resistance.
- a bearing used for a recirculation exhaust gas flow rate adjustment valve of an EGR (Exhaust Gas ⁇ ⁇ ⁇ Recirculation) type internal combustion engine.
- the bearing used for the recirculation exhaust gas flow control valve of the EGR internal combustion engine is made of graphite or a sintered Cu alloy containing Sn: 7 to 10% and C: 5 to 9% by mass. The ones made are known.
- Patent Document 2 discloses a structure composed of a sintered Cu alloy having a structure in which free graphite is dispersed and distributed on a substrate of a Cu—Ni—Sn solid solution.
- examples of sintered sliding materials that are exposed to seawater and snow melting agents include sliding materials for outboard motors and exhaust throttle valve bearings used in diesel exhaust gas purification systems. These require high corrosion resistance, but especially exhaust throttle valve bearings are required to have heat resistance, corrosion resistance, and wear resistance in environments where heating and cooling are repeated while being exposed to high-temperature chlorides. Yes. In addition, the thing made from stainless steel is used for this bearing.
- the sintered Cu alloy of Patent Document 2 can exhibit excellent wear resistance even in a high temperature environment, but a sintered sliding member having further excellent heat resistance and corrosion resistance is desired.
- stainless steel bearings can exhibit excellent heat resistance and corrosion resistance in an environment where heating and cooling are repeated while being exposed to high-temperature chloride, but wear resistance is not sufficient.
- an object of the present invention is to provide a novel sintered sliding member having excellent heat resistance, corrosion resistance, and wear resistance.
- the sintered sliding member of the present invention comprises, by mass, 7.7 to 30.3% Cu, 2.0 to 20.0% Sn, 0.3 to 7.0% boron nitride, And the balance consists of Ni and inevitable impurities.
- the porosity is 5 to 25%.
- the sintered sliding member of the present invention comprises, by mass, 7.7 to 30.3% Cu, 2.0 to 20.0% Sn, 0.3 to 7.0% boron nitride, When the balance is made of Ni and inevitable impurities, the heat resistance, corrosion resistance, and wear resistance are excellent.
- the sintered sliding member of the present invention comprises, by mass, 7.7 to 30.3% Cu, 2.0 to 20.0% Sn, 0.3 to 7.0% boron nitride, And the balance consists of Ni and inevitable impurities.
- the sintered sliding member of the present invention has a lower Cu content than a conventional sintered Cu-based alloy, relatively increases the Ni content, and further contains boron nitride, thereby improving heat resistance and corrosion resistance. It will be excellent.
- the porosity is 5 to 25%. And by this composition, friction resistance falls and it becomes what was further excellent in abrasion resistance.
- Cu Cu has the effect of forming a solid solution of Ni and Sn and improving the wear resistance of the sintered sliding member. If the Cu content is less than 7.7%, the wear resistance is insufficient. On the other hand, if it exceeds 30.3%, the heat resistance and corrosion resistance become insufficient, such being undesirable. Therefore, the Cu content is 7.7 to 30.3%.
- Sn Sn lowers the melting point to improve the sinterability, forms a solid solution with Cu and Ni, improves the strength of the sintered sliding member, and contributes to improved wear resistance. If the Sn content is less than 2%, the predetermined wear resistance cannot be obtained. On the other hand, if it exceeds 20%, the aggression against the sliding partner material is increased and the counterpart material is worn, which is not preferable. Therefore, the Sn content is set to 2.0 to 20.0%.
- Boron nitride imparts excellent lubricity to the sintered sliding member as a solid lubricant and reduces metal contact between the sliding members, thereby contributing to improvement in wear resistance of the sintered sliding member. Furthermore, there is an effect of improving high temperature salt damage resistance. If the ratio is less than 0.3%, the desired effect cannot be obtained. On the other hand, if it exceeds 7.0%, the strength of the sintered sliding member decreases, which is not preferable. Therefore, the boron nitride content is set to 0.3 to 7.0%.
- the porosity is less than 5%, the deformation resistance of the sintered sliding member increases, and the dimensional accuracy in the correction process cannot be sufficiently obtained.
- the porosity exceeds 25%, the mechanical characteristics are deteriorated, and characteristics such as strength are not satisfied even when sizing and coining are performed. Therefore, in the above composition, the porosity is in the range of 5 to 25%.
- the sintered sliding member of the present invention is not limited to a following example, A various deformation
- a bearing having a sliding surface on the inner periphery will be described.
- the present invention is not limited to this and can be implemented in various sintered sliding members.
- Raw material powders particle size—100 mesh Ni-30% Cu atomized powder, average particle size 4.0 ⁇ m Ni powder, particle size—200 mesh Cu powder, particle size—250 mesh Sn atomized powder, particle size— A 75 ⁇ m boron nitride powder and a graphite powder having a particle size of ⁇ 150 mesh were prepared. These raw material powders are blended so as to have the final component composition shown in Table 1, 0.5% of zinc stearate is added, mixed for 30 minutes with a V-type mixer, and then pressed to produce a green compact. did.
- This green compact is mixed with natural gas and air, and passed through a heated catalyst, and in an endothermic gas (endothermic gas) atmosphere that has been decomposed and transformed, at a sintering temperature of 1050 ° C. for 20 minutes. Sintering followed by sizing.
- High temperature salt damage cycle test The high-temperature salt damage cycle test was repeated 15 times on the ring-shaped test pieces of Invention Examples 1 to 15 and Comparative Examples 1 to 8, and the amount of change in the inner diameter of the ring-shaped test pieces before and after the test was determined. The degree of corrosion when exposed was evaluated. The results are shown in Table 1 as resistance to high temperature salt damage (change in inner diameter dimension). In addition, the amount of change in the inner diameter dimension is smaller as the material is more resistant to high temperature salt damage.
- the test piece was heated at 500 ° C. for 8 hours, cooled at room temperature for 30 minutes, immersed in 5% saline for 20 minutes at room temperature, and dried at 50 ° C. for 60 minutes. Again, 15 cycles of heating at 500 ° C. for 8 hours were performed.
- the sintered sliding member of the present invention was excellent in wear resistance, heat resistance and corrosion resistance.
- FIG. 2 shows a scanning electron micrograph of the cross-sectional structure of the sintered sliding member of the first invention. It was confirmed that the boron nitride powder was dispersed in the Ni—Cu—Sn matrix.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Sliding-Contact Bearings (AREA)
- Powder Metallurgy (AREA)
- Ceramic Products (AREA)
Abstract
Description
CuはNiおよびSnと素地の固溶体を形成して焼結摺動部材の耐摩耗性を向上させる効果がある。Cuの含有量が7.7%未満では耐摩耗性が不十分となり、一方、30.3%を超えると耐熱性及び耐食性が不十分となるので好ましくない。したがって、Cuの含有量は、7.7~30.3%とした。
Snは融点を下げて焼結性を向上させ、Cu、Niと固溶体を形成して焼結摺動部材の強度を向上させ、耐摩耗性向上に寄与する。Snの含有量が2%未満では所定の耐摩耗性が得られず、一方、20%を越えると摺動相手材への攻撃性が高まり、相手材を摩耗させてしまうので好ましくない。したがって、Snの含有量は、2.0~20.0%とした。
窒化ホウ素は、固体潤滑剤として焼結摺動部材に優れた潤滑性を付与するとともに、摺動部材同士の金属接触を少なくし、もって焼結摺動部材の耐摩耗性向上に寄与する。さらに、耐高温塩害性を向上させる効果がある。その割合が0.3%未満では所望の効果が得られず、一方、7.0%を超えると焼結摺動部材の強度が低下するので好ましくない。したがって、窒化ホウ素の含有量は0.3~7.0%とした。
Cは素地に溶けて固溶体を形成するとともに、固体潤滑剤として作用し、焼結摺動部材に優れた耐高温塩害性を付与する。添加する場合は、Cの含有量が0.1%未満では添加した効果が見られず、一方、3.0%を超えると焼結摺動部材の強度と耐摩耗性が低下するので好ましくない。したがって、Cを添加する場合のCの含有量は0.1~3.0%とした。
Pは耐摩耗性に寄与し、耐摩耗性を向上させる。添加する場合は、Pの含有量が0.1%未満では添加した効果が見られず、一方、0.7%を越えると焼結摺動部材の耐食性が低下するので好ましくない。したがって、Pを添加する場合のPの含有量は0.1~0.7%とした。
気孔率が5%未満では、焼結摺動部材の変形抵抗が高まり、矯正工程での寸法精度が十分に得られない。一方、気孔率が25%を越えると機械的特性が低下して、サイジングやコイニングを行っても強度等の特性が満足すべきものとならない。したがって、上記の組成において、気孔率は5~25%の範囲とした。
本発明例1~15と比較例1~8のリング状試験片に、それぞれSUS304の硬質クロムメッキ処理を施したステンレスシャフトを挿入した。リング状試験片の外側から、リング状試験片の半径方向(ステンレスシャフトの軸方向に対して直角方向)に向けて29Nの荷重をかけ、リング状試験片が120℃に保たれるように加熱制御し、潤滑油を使用しないドライ条件で、ステンレスシャフトをリング状試験片の中心角90°の円弧の範囲で往復させる摺動試験を実施した。50万回往復摺動試験後の軸受内径の最大摩耗深さとステンレスシャフトの最大摩耗深さを測定し、耐摩耗性を評価した。その結果を表1に最大摩耗深さ、ステンレスシャフトの最大摩耗深さとして記載した。
本発明例1~15と比較例1~8のリング状試験片で高温塩害サイクル試験を15サイクル繰返し行い、試験前後のリング状試験片の内径寸法変化量を求めることで、高温塩害環境下に曝されたときの腐食度合いを評価した。その結果を表1に耐高温塩害性(内径寸法変化)として記載した。なお、耐高温塩害性の良好な材料ほど内径寸法変化量は小さくなる。
本発明例1~15と比較例1~8のリング状試験片の気孔率を測定し、その測定値を表1に気孔率として掲載した。気孔率の測定方法はJISZ2501焼結金属材料-密度、含油率及び開放気孔率試験方法に準じて行った。
Claims (4)
- 質量%で、7.7~30.3%のCuと、2.0~20.0%のSnと、0.3~7.0%の窒化ホウ素とを含有し、残部がNiおよび不可避不純物からなることを特徴とする焼結摺動部材。
- 質量%で、7.7~30.3%のCuと、2.0~20.0%のSnと、0.3~7.0%の窒化ホウ素と、0.1~3.0%のCとを含有し、残部がNiおよび不可避不純物からなることを特徴とする焼結摺動部材。
- 質量%で、7.7~30.3%のCuと、2.0~20.0%のSnと、0.3~7.0%の窒化ホウ素と、0.1~0.7%のPとを含有し、残部がNiおよび不可避不純物からなることを特徴とする焼結摺動部材。
- 気孔率が5~25%であることを特徴とする請求項1~3のいずれか1項記載の焼結摺動部材。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10835953.0A EP2511388B1 (en) | 2009-12-07 | 2010-12-07 | Sintered sliding member |
CN2010800542081A CN102648299B (zh) | 2009-12-07 | 2010-12-07 | 烧结滑动部件 |
BR112012013137-0A BR112012013137B1 (pt) | 2009-12-07 | 2010-12-07 | Sintered sliding element |
US13/504,645 US8709124B2 (en) | 2009-12-07 | 2010-12-07 | Sintered sliding member |
JP2011545209A JP5337884B2 (ja) | 2009-12-07 | 2010-12-07 | 焼結摺動部材 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009278052 | 2009-12-07 | ||
JP2009-278052 | 2009-12-07 |
Publications (1)
Publication Number | Publication Date |
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WO2011071033A1 true WO2011071033A1 (ja) | 2011-06-16 |
Family
ID=44145577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2010/071879 WO2011071033A1 (ja) | 2009-12-07 | 2010-12-07 | 焼結摺動部材 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8709124B2 (ja) |
EP (1) | EP2511388B1 (ja) |
JP (1) | JP5337884B2 (ja) |
CN (1) | CN102648299B (ja) |
BR (1) | BR112012013137B1 (ja) |
WO (1) | WO2011071033A1 (ja) |
Cited By (2)
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JP2013057365A (ja) * | 2011-09-08 | 2013-03-28 | Ntn Corp | 配光可変型前照灯装置用すべり軸受 |
JP2015121324A (ja) * | 2015-01-20 | 2015-07-02 | Ntn株式会社 | 配光可変型前照灯装置用すべり軸受 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6440297B2 (ja) * | 2014-09-04 | 2018-12-19 | 株式会社ダイヤメット | Cu基焼結軸受 |
JP6468766B2 (ja) * | 2014-09-11 | 2019-02-13 | 株式会社ダイヤメット | 耐食性、耐熱性、耐摩耗性に優れた焼結摺動材及びその製造方法 |
US10941465B2 (en) | 2016-03-04 | 2021-03-09 | Diamet Corporation | Cu-based sintered sliding material, and production method therefor |
JP6769007B2 (ja) * | 2017-06-29 | 2020-10-14 | 株式会社ダイヤメット | モータ式燃料ポンプ用焼結軸受及びその製造方法 |
CN110484915B (zh) * | 2019-09-09 | 2021-06-11 | 南京工程学院 | 一种于轴套类零件内表面制备减摩耐磨多孔涂层的方法 |
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2010
- 2010-12-07 EP EP10835953.0A patent/EP2511388B1/en active Active
- 2010-12-07 WO PCT/JP2010/071879 patent/WO2011071033A1/ja active Application Filing
- 2010-12-07 CN CN2010800542081A patent/CN102648299B/zh active Active
- 2010-12-07 US US13/504,645 patent/US8709124B2/en active Active
- 2010-12-07 JP JP2011545209A patent/JP5337884B2/ja active Active
- 2010-12-07 BR BR112012013137-0A patent/BR112012013137B1/pt not_active IP Right Cessation
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JPS63109131A (ja) * | 1986-10-24 | 1988-05-13 | Nippon Funmatsu Gokin Kk | 焼結合金摩擦材料 |
JPH11158511A (ja) * | 1997-11-26 | 1999-06-15 | Oiles Ind Co Ltd | 多孔質静圧気体軸受用の軸受素材及びこれを用いた多孔質静圧気体軸受 |
JP2002521610A (ja) | 1998-07-30 | 2002-07-16 | シーメンス カナダ リミテッド | 排気ガス再循環アセンブリ |
JP2000309807A (ja) * | 1999-04-23 | 2000-11-07 | Daido Metal Co Ltd | 摺動部材 |
JP2004068074A (ja) | 2002-08-06 | 2004-03-04 | Mitsubishi Materials Corp | 高温環境下ですぐれた耐摩耗性を示すEGR式内燃機関の再循環排ガス流量制御弁の焼結Cu合金製軸受 |
JP2006097797A (ja) * | 2004-09-29 | 2006-04-13 | Oiles Ind Co Ltd | 多孔質静圧気体軸受及びその製造方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2013057365A (ja) * | 2011-09-08 | 2013-03-28 | Ntn Corp | 配光可変型前照灯装置用すべり軸受 |
JP2015121324A (ja) * | 2015-01-20 | 2015-07-02 | Ntn株式会社 | 配光可変型前照灯装置用すべり軸受 |
Also Published As
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EP2511388A4 (en) | 2017-05-03 |
EP2511388B1 (en) | 2018-03-14 |
US8709124B2 (en) | 2014-04-29 |
BR112012013137A2 (pt) | 2017-03-21 |
BR112012013137B1 (pt) | 2018-02-06 |
JP5337884B2 (ja) | 2013-11-06 |
US20120204677A1 (en) | 2012-08-16 |
JPWO2011071033A1 (ja) | 2013-04-22 |
CN102648299A (zh) | 2012-08-22 |
EP2511388A1 (en) | 2012-10-17 |
CN102648299B (zh) | 2013-11-06 |
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