JP5856359B2 - バルブシートの製造方法 - Google Patents
バルブシートの製造方法 Download PDFInfo
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- JP5856359B2 JP5856359B2 JP2015535213A JP2015535213A JP5856359B2 JP 5856359 B2 JP5856359 B2 JP 5856359B2 JP 2015535213 A JP2015535213 A JP 2015535213A JP 2015535213 A JP2015535213 A JP 2015535213A JP 5856359 B2 JP5856359 B2 JP 5856359B2
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- valve seat
- iron
- based sintered
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
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- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- 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
- B22F5/008—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of engine cylinder parts or of piston parts other than piston rings
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- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/007—Heat treatment of ferrous alloys containing Co
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- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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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
- C22C1/10—Alloys containing non-metals
- C22C1/1078—Alloys containing non-metals by internal oxidation of material in solid state
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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
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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
- C22C32/001—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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/10—Oxidising
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/10—Oxidising
- C23C8/12—Oxidising using elemental oxygen or ozone
- C23C8/14—Oxidising of ferrous surfaces
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K25/00—Details relating to contact between valve members and seat
- F16K25/005—Particular materials for seats or closure elements
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- 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
- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/15—Nickel or cobalt
-
- 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
- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/35—Iron
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- 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
- B22F2302/00—Metal Compound, non-Metallic compound or non-metal composition of the powder or its coating
- B22F2302/10—Carbide
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- 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
- B22F2302/00—Metal Compound, non-Metallic compound or non-metal composition of the powder or its coating
- B22F2302/25—Oxide
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0207—Using a mixture of prealloyed powders or a master alloy
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
- C22C33/0285—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with Cr, Co, or Ni having a minimum content higher than 5%
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2301/00—Using particular materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2301/00—Using particular materials
- F01L2301/02—Using ceramic materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2303/00—Manufacturing of components used in valve arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/01—Absolute values
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Description
・酸化物の面積率の測定
バルブシートの断面の一部を走査型電子顕微鏡で抽出し、エネルギー分散型X線分析装置(EDX)の酸素マップを用いて以下の手順で求めた。
鉄基焼結合金の断面を、光学顕微鏡又は電子顕微鏡を用いて200倍で観察し、1mm×1mm範囲の断面組織写真の硬質粒子部を方眼紙にトレースして面積を求め、4箇所の測定値の平均値を、硬質粒子の面積率とした。
図12に示すバルブシート摩耗試験機にバルブシート3を取り付けた。すなわち、このバルブシート摩耗試験機は、枠体1の上端部のシートホルダ2に嵌め込まれたバルブシート3に対して、バルブ4のフェース面がスプリング5によって当接するように構成されている。バルブ4は、電動機6で回転するカムシャフト7によってロッド8を介して上方へ持ち上げられ、次にスプリング5によって戻されることにより、バルブシート3に当たる。そして、バルブ4をガスバーナ9で加熱し、バルブシート3の温度を熱電対10で測定し、温度管理している。また、バルブ4の加熱の際には、表面に酸化膜が生じないようにガスバーナの燃焼状態を完全燃焼とする。なお、バルブ4、スプリング5、カムシャフト7などはエンジン実機部品を用いている。そして、表1に示す条件にて耐摩耗試験を行った。
JIS Z2507「焼結含油軸受の圧環強さ試験方法」に準じて測定を行った。
JIS Z2245「ロックウェル硬さ試験−試験方法」に準じて測定した。
JIS Z2501「焼結金属材料−密度、含油率及び開放気孔率試験方法」に準じて測定した。
Fe粉末、硬質粒子(Co基合金粒子)、Co粒子、固体潤滑剤(硫化マンガン)を、表2、3に示す割合で混合して金型に充填した後、成形プレスにより圧縮成形した。得られた圧粉体を1120℃で0.5時間焼成し、鉄基焼結合金を得た。
Fe粉末、硬質粒子(Co基合金粒子)、Co粒子、固体潤滑剤(硫化マンガン)を、表4に示す割合で混合して金型に充填した後、成形プレスにより圧縮成形した。得られた圧粉体を1120℃で0.5時間焼成し、鉄基焼結合金を得た。
Claims (6)
- 内燃機関のシリンダヘッドに装着されるバルブシートの製造方法であって、
Co成分の純度が99質量%以上であるCo粒子を4〜15質量%と、硬度が600〜1600HVであり、Co基合金粒子からなる硬質粒子を5〜45質量%とを含有する鉄基焼結合金を、酸化処理することで、
前記鉄基焼結合金の表面及び内部に、四三酸化鉄(Fe3O4)及び酸化コバルト(CoO)を主体とする酸化物が形成されると共に、シリンダヘッドに装着される前の状態で、断面における前記酸化物の面積率が5〜25%である酸化処理鉄基焼結合金を有するバルブシートを製造することを特徴とするバルブシートの製造方法。 - 前記Co粒子は、平均粒径が10〜40μmである請求項1に記載のバルブシートの製造方法。
- 前記Co基合金粒子は、Coを28〜38質量%含有し、炭化物を含むものである請求項1又は2に記載のバルブシートの製造方法。
- 前記鉄基焼結合金は、前記鉄基焼結合金の断面における前記硬質粒子の面積率が5〜45%である請求項1〜3のいずれか1項に記載のバルブシートの製造方法。
- 前記鉄基焼結合金は、更に固体潤滑剤を含有する請求項1〜4のいずれか1項に記載のバルブシートの製造方法。
- 前記固体潤滑剤は、平均粒径が1〜10μmである請求項5に記載のバルブシートの製造方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2013/073895 WO2015033415A1 (ja) | 2013-09-05 | 2013-09-05 | バルブシート |
Publications (2)
Publication Number | Publication Date |
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JP5856359B2 true JP5856359B2 (ja) | 2016-02-09 |
JPWO2015033415A1 JPWO2015033415A1 (ja) | 2017-03-02 |
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JP2015535213A Active JP5856359B2 (ja) | 2013-09-05 | 2013-09-05 | バルブシートの製造方法 |
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Country | Link |
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US (2) | US9556761B2 (ja) |
EP (1) | EP2982836B1 (ja) |
JP (1) | JP5856359B2 (ja) |
KR (1) | KR101600907B1 (ja) |
CN (1) | CN105102776B (ja) |
BR (1) | BR112015026887B1 (ja) |
WO (1) | WO2015033415A1 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2020180375A (ja) * | 2019-04-24 | 2020-11-05 | 株式会社ダイヤメット | 焼結摺動部材およびその製造方法 |
US11353117B1 (en) | 2020-01-17 | 2022-06-07 | Vulcan Industrial Holdings, LLC | Valve seat insert system and method |
US11421679B1 (en) | 2020-06-30 | 2022-08-23 | Vulcan Industrial Holdings, LLC | Packing assembly with threaded sleeve for interaction with an installation tool |
US11421680B1 (en) | 2020-06-30 | 2022-08-23 | Vulcan Industrial Holdings, LLC | Packing bore wear sleeve retainer system |
US11384756B1 (en) | 2020-08-19 | 2022-07-12 | Vulcan Industrial Holdings, LLC | Composite valve seat system and method |
USD980876S1 (en) | 2020-08-21 | 2023-03-14 | Vulcan Industrial Holdings, LLC | Fluid end for a pumping system |
USD997992S1 (en) | 2020-08-21 | 2023-09-05 | Vulcan Industrial Holdings, LLC | Fluid end for a pumping system |
USD986928S1 (en) | 2020-08-21 | 2023-05-23 | Vulcan Industrial Holdings, LLC | Fluid end for a pumping system |
US11391374B1 (en) | 2021-01-14 | 2022-07-19 | Vulcan Industrial Holdings, LLC | Dual ring stuffing box |
US11434900B1 (en) | 2022-04-25 | 2022-09-06 | Vulcan Industrial Holdings, LLC | Spring controlling valve |
US11920684B1 (en) | 2022-05-17 | 2024-03-05 | Vulcan Industrial Holdings, LLC | Mechanically or hybrid mounted valve seat |
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JPH07133705A (ja) * | 1993-11-10 | 1995-05-23 | Mitsubishi Materials Corp | バルブシート |
JP2004232088A (ja) * | 2003-01-10 | 2004-08-19 | Nippon Piston Ring Co Ltd | 鉄基焼結合金製バルブシートおよびその製造方法 |
JP2013113220A (ja) * | 2011-11-29 | 2013-06-10 | Tpr Co Ltd | バルブシート |
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GB9311051D0 (en) * | 1993-05-28 | 1993-07-14 | Brico Eng | Valve seat insert |
US6139598A (en) * | 1998-11-19 | 2000-10-31 | Eaton Corporation | Powdered metal valve seat insert |
JP3952344B2 (ja) | 1998-12-28 | 2007-08-01 | 日本ピストンリング株式会社 | バルブシート用耐摩耗性鉄基焼結合金材および鉄基焼結合金製バルブシート |
JP2001050020A (ja) * | 1999-05-31 | 2001-02-23 | Nippon Piston Ring Co Ltd | 内燃機関用の弁装置 |
US20040194579A1 (en) | 2001-02-22 | 2004-10-07 | Wintle Roger Harvey | Apparatus and process for recovery of metal values |
JP4624600B2 (ja) * | 2001-06-08 | 2011-02-02 | トヨタ自動車株式会社 | 焼結合金、その製造方法およびバルブシート |
JP3970060B2 (ja) * | 2002-03-12 | 2007-09-05 | 株式会社リケン | バルブシート用鉄基焼結合金 |
US20040069094A1 (en) * | 2002-06-28 | 2004-04-15 | Nippon Piston Ring Co., Ltd. | Iron-based sintered alloy material for valve sheet and process for preparing the same |
US20070101964A1 (en) * | 2003-09-30 | 2007-05-10 | Mitsubishi Materials Pmg Corporation | Valve seat for engine method of manufacturing the valve seat, and cylinder head for engine |
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2013
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0457844B2 (ja) * | 1981-10-31 | 1992-09-14 | Nippon Piston Ring Co Ltd | |
JPH07133705A (ja) * | 1993-11-10 | 1995-05-23 | Mitsubishi Materials Corp | バルブシート |
JP2004232088A (ja) * | 2003-01-10 | 2004-08-19 | Nippon Piston Ring Co Ltd | 鉄基焼結合金製バルブシートおよびその製造方法 |
JP2013113220A (ja) * | 2011-11-29 | 2013-06-10 | Tpr Co Ltd | バルブシート |
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WO2015033415A1 (ja) | 2015-03-12 |
EP2982836A4 (en) | 2017-01-04 |
BR112015026887A2 (pt) | 2017-07-25 |
CN105102776A (zh) | 2015-11-25 |
EP2982836A1 (en) | 2016-02-10 |
US20160201527A1 (en) | 2016-07-14 |
BR112015026887B1 (pt) | 2022-01-11 |
KR20160014101A (ko) | 2016-02-05 |
CN105102776B (zh) | 2016-10-12 |
EP2982836B1 (en) | 2019-01-16 |
US10036287B2 (en) | 2018-07-31 |
KR101600907B1 (ko) | 2016-03-08 |
BR112015026887A8 (pt) | 2019-12-24 |
JPWO2015033415A1 (ja) | 2017-03-02 |
US9556761B2 (en) | 2017-01-31 |
US20160333456A1 (en) | 2016-11-17 |
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