WO2004048756A1 - Ventilsitz und verfahren zur herstellung eines ventilsitzes - Google Patents
Ventilsitz und verfahren zur herstellung eines ventilsitzes Download PDFInfo
- Publication number
- WO2004048756A1 WO2004048756A1 PCT/EP2003/011615 EP0311615W WO2004048756A1 WO 2004048756 A1 WO2004048756 A1 WO 2004048756A1 EP 0311615 W EP0311615 W EP 0311615W WO 2004048756 A1 WO2004048756 A1 WO 2004048756A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cylinder head
- valve seat
- inner layer
- alloy
- outer layer
- 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.)
- Ceased
Links
Classifications
-
- 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
- F01L3/04—Coated valve members or valve-seats
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49298—Poppet or I.C. engine valve or valve seat making
- Y10T29/49306—Valve seat making
Definitions
- the invention relates to a valve seat for a cylinder head of an internal combustion engine as defined in the preamble of claim 1.
- the invention further relates to a method for producing a valve seat for a cylinder head of an internal combustion engine as defined in the preamble of claim 10.
- DE 199 12 889 AI describes a generic valve seat and a generic method for producing the same.
- An additional material namely an alloy or a mixture of an aluminum-silicon alloy and nickel, is fused to the base material of the cylinder head by a laser beam.
- DE 199 12 894 A1 describes a method for coating the surface of metal workpieces with a filler material in powder or wire form. Another such method is known from EP 00 92 683 B1.
- the base material of the cylinder head consists essentially of aluminum and as an additional material for forming the valve seat either iron or nickel or an alloy with one of these two metals is used as the main component.
- the disadvantage here is that iron and nickel have a much higher melting point than the cylinder head made of aluminum. This can lead to the fact that when a laser beam is applied, the cylinder head may already have melted when the additional material only begins to melt. It can also happen that the previously liquid iron has already solidified while the aluminum is still in the form of a melt. This leads to the formation of intermetallic phases in the border area between iron and aluminum material, which can result in a very brittle structure. It is therefore difficult to achieve a homogeneous connection between the valve seat to be created and the base material of the cylinder head, the different surface tensions of the materials also playing an important role here.
- EP 02 28 282 B1 describes a cylinder head consisting of an aluminum alloy.
- the valve seats of this cylinder head are made of a plated copper alloy layer.
- a method for surface coating of light metal components, in particular light metal pistons of internal combustion engines, with a strength-increasing and / or wear-resistant filler material is apparent from DE 22 00 003 AI.
- valve seat is to be fused with the base material of the cylinder head as an additional material
- this additional material has both the adhesion to the base material of the cylinder head and the strength properties for absorbing the forces introduced by the gas exchange valve and the tribological properties for minimizing wear must ensure on the surface of the valve seat.
- the very different tasks that the valve seat has to fulfill can advantageously be divided.
- the inner layer facing the cylinder head can take over the task of connecting the valve seat to the base material of the cylinder head, and the outer layer facing away from the cylinder head can be designed so that it has good strength and wear properties for the valve seat.
- the inner layer has good heat conduction properties points, the heat dissipation from the valve seat surface into the cylinder head is advantageously improved in that the air gap between the valve seat and the cylinder head is avoided by the melt-metallurgical connection.
- the inner layer has copper or a copper alloy, since just such a material combines with the aluminum material of the cylinder head.
- the outer layer prevents the copper material of the inner layer from coming into contact with sulfur-containing fuel or exhaust gas constituents and can thus worsen the emission values.
- the outer layer has nickel, iron and / or cobalt or an alloy with at least one of these materials. These materials have proven to be particularly hard and wear-resistant and have a very high strength. Another advantage of these materials is the good connectivity with the copper material of the inner layer that may be used.
- the at least two layers according to the invention can be connected to the base material of the cylinder head in a particularly simple and process-reliable manner, the advantageous properties of the valve seat explained above being retained.
- a process that is particularly efficient in terms of production technology results if the inner layer is placed on the cylinder head in the form of a fixed ring and the outer right layer in powder form is applied to the inner layer.
- FIG. 1 shows a section through an inventive valve seat for a cylinder head of an internal combustion engine.
- Fig. 4 shows a further embodiment of the method according to the invention.
- Fig. 1 shows part of a cylinder head 1 of an internal combustion engine, not shown in its entirety.
- the cylinder head 1 has, in a manner known per se, an inlet duct 2 which can be closed or opened by a gas exchange valve 3.
- a fuel / air mixture can enter the combustion chamber 4 in a manner known per se and is located below the cylinder head 1.
- the cylinder head 1 also has a valve seat 5, against which the gas exchange valve 3 rests in its closed state and in this way separates the inlet duct 2 from the combustion chamber 4.
- FIG. 1 shows part of a cylinder head 1 of an internal combustion engine, not shown in its entirety.
- the cylinder head 1 has, in a manner known per se, an inlet duct 2 which can be closed or opened by a gas exchange valve 3.
- a fuel / air mixture can enter the combustion chamber 4 in a manner known per se and is located below the cylinder head 1.
- the cylinder head 1 also has a valve seat 5, against which the gas exchange valve 3 rests in its
- valve seat 5 has two formed of respective additional material layers 6 and 7, namely a lower or inner, the Zy ⁇ linder head 1 facing layer 6 and an upper or outer, the cylinder head 1 facing away from and Layer 7 facing gas exchange valve 3.
- Inner layer 6 serves to connect valve seat 5 to cylinder head 1 and therefore has good connection properties to the base material of cylinder head 1.
- the cylinder head 1 in the present case consists of a light metal, in particular aluminum
- copper or a copper alloy is used for the inner layer 6, since this material has a particularly good affinity for aluminum.
- the alloy CuAlio, ie a copper alloy with 10 percent by weight aluminum the inner layer 6 is well bonded to the material of the cylinder head 1.
- Iron has also proven to be a suitable alloy component for the inner layer.
- pure copper can also be used for the inner layer 6.
- the inner layer 6 In addition to the good connection properties to the base material of the cylinder head 1, the inner layer 6 also has good heat conduction properties in order to achieve an improvement in heat dissipation from the surface of the valve seat 5 into the cylinder head 1.
- the air-gap between the valve seat 5 and the cylinder head 1 is avoided by the melting metallurgical application.
- the thermal conductivity of copper at 20 ° C is approx. 350 - 400 W / mK
- that of aluminum at 20 ° C is approx. 200 - 250 W / mK
- that of the alloy used for the inner layer 6 at 20 ° C. approx. 200-400 W / mK the thermal conductivity of copper at 20 ° C is approx. 350 - 400 W / mK
- that of aluminum at 20 ° C is approx. 200 - 250 W / mK
- the alloy used for the inner layer 6 at 20 ° C. approx. 200-400 W / mK.
- nickel, iron and / or cobalt or an alloy with at least one of these materials is preferably used for the same.
- a material may have a tendency to form intermetallic phases when it is connected to the aluminum of the cylinder head 1, which could lead to cracking, the outer layer 7 is not connected to the cylinder head 1 due to the presence of the inner layer 6, so that such intermetallic phases do not occur.
- Chromium, silicon and molybdenum have proven to be particularly suitable as further alloy constituents for the material of the outer layer 7.
- Some alloys that can be used for the outer layer 7 are given below by way of example, wherein in addition to the three elements mentioned above, other elements are also used as further alloy components: Co25Crl0Ni7W0.5C, Co28Mo8Cr2Si, Co28Mol7Cr3Si, Nil7Cr6A10.5Y, Ni22CrlOAll .0Y, Ni25Cr6A10.4Y, Ni31CrllA10.6Y, Ni23Co20Cr8.5A14Ta0.6Y, Nil5Cr4Si3Fe3B0.75C, Ni21.5Cr8.5Mo3Fe0.5Co, Nil9Crl8Fe3MolColTi or Ni8.5Cr3T2A15M2C2Ti.
- this list makes no claim to completeness and materials used in commercially available valve seat rings can be used.
- Layers 6 and 7 are made of other materials which ensure that the inner layer 6 has good bonding properties to the base material of the cylinder head 1 and the outer layer 7 has good strength and wear properties.
- FIGS. 2 and 3 show two different methods for producing the valve seat 5 by fusing the additional materials specified above with the cylinder head 1, only the attachment of the inner layer 6 on the cylinder head 1 being shown in each case.
- a nozzle 8 is arranged in the region of the valve seat 5 to be formed, which nozzle 8 outputs the additional material for forming the inner layer 6 in the direction of the cylinder head 1.
- the additional material hits the cylinder head 1 or in a groove formed in the same, it is melted simultaneously by the process of a laser beam 9 together with the outer layer of the base material of the cylinder head 1 in order to produce a melt 10 on the cylinder head 1.
- the machining pre-processing is coordinated with the coating process.
- the use of an electron beam (not shown) or a suitable device is also possible as an energy source in order to generate the melt 10 from the additional material 7 by applying or introducing energy.
- the additional material 7 is applied in powder form, application as a tape also being possible.
- the nozzle 8 and the laser beam 9 are continuously moved in a circular movement corresponding to the contour of the valve seat 5.
- the laser beam 9 moves away from the melt 10 in the feed direction according to arrow A. has solidified to the inner layer 6. This is a so-called one-step process.
- Fig. 3 shows an alternative method for producing the valve seat 5, in which the additional material, for example in the form of a paste, a wire, a sintered body or a powder preform, preferably placed in a ring shape in a groove of the cylinder head 1 or applied to it and then with the same Laser beam 9 or an electron beam is melted into the melt 10.
- the inner layer 6 of the valve seat 5 arises from the melt 10 after the removal of the laser beam 9 in the direction of arrow A.
- This method is referred to as a two-stage process.
- the outer layer 7 can be applied in a very similar manner in both methods, which of course is not fused to the cylinder head 1 but to the inner layer 6.
- a combination of these two methods is also possible, in which, for example, the inner layer 6 is placed on the cylinder head 1 in the form of a ring and the outer layer 7 can then be connected in powder form to the inner layer 6.
- Fig. 4 shows in a very schematic representation another way to carry out the method for manufacturing the valve seat 5.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/536,682 US20060162686A1 (en) | 2002-11-28 | 2003-10-21 | Valve seat and method for producing a valve seat |
| JP2004554288A JP2006516313A (ja) | 2002-11-28 | 2003-10-21 | 弁座及び弁座を製造する方法 |
| EP03811739A EP1565646A1 (de) | 2002-11-28 | 2003-10-21 | Ventilsitz und verfahren zur herstellung eines ventilsitzes |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10255447.1 | 2002-11-28 | ||
| DE10255447A DE10255447A1 (de) | 2002-11-28 | 2002-11-28 | Ventilsitz und Verfahren zur Herstellung eines Ventilsitzes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004048756A1 true WO2004048756A1 (de) | 2004-06-10 |
Family
ID=32335805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2003/011615 Ceased WO2004048756A1 (de) | 2002-11-28 | 2003-10-21 | Ventilsitz und verfahren zur herstellung eines ventilsitzes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20060162686A1 (de) |
| EP (1) | EP1565646A1 (de) |
| JP (1) | JP2006516313A (de) |
| DE (1) | DE10255447A1 (de) |
| WO (1) | WO2004048756A1 (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340747C (zh) * | 2004-11-03 | 2007-10-03 | 重庆力帆实业(集团)有限公司 | 水冷双燃料发动机进气门座 |
| CN100340748C (zh) * | 2004-11-03 | 2007-10-03 | 重庆力帆实业(集团)有限公司 | 水冷双燃料发动机排气门座 |
| CN113843503A (zh) * | 2020-06-26 | 2021-12-28 | 通用汽车环球科技运作有限责任公司 | 将气门座镶圈附接至铝制气缸盖的方法 |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5155686B2 (ja) * | 2008-02-17 | 2013-03-06 | サンデン株式会社 | 往復動圧縮機の弁板と吸入弁及び/又は吐出弁との当接部の貼付き防止のための弁板の加工方法及び往復動圧縮機 |
| US20100269778A1 (en) * | 2009-04-22 | 2010-10-28 | Gm Global Technology Operations, Inc. | Cylinder head assembly for an internal combustion engine and method of making the same |
| US8662045B2 (en) * | 2009-08-03 | 2014-03-04 | GM Global Technology Operations LLC | Cylinder head assembly for an internal combustion engine |
| US9228458B2 (en) * | 2010-02-19 | 2016-01-05 | Ford Global Technologies, Llc | Valve seat insert |
| US9291291B2 (en) | 2013-05-23 | 2016-03-22 | Ti Group Automotive Systems, Llc | Tube fitting with integrated seal |
| JP6291175B2 (ja) * | 2013-07-05 | 2018-03-14 | 株式会社リケン | バルブシート及びその製造方法 |
| CN105492748A (zh) * | 2013-08-30 | 2016-04-13 | 日立工机株式会社 | 发动机以及具备该发动机的发动机作业机 |
| JP6316588B2 (ja) | 2013-12-27 | 2018-04-25 | 日本ピストンリング株式会社 | 内燃機関用バルブとバルブシートの組合せ体 |
| DE102017102544A1 (de) | 2017-02-09 | 2018-08-09 | Man Diesel & Turbo Se | Ventilsitzring eines Gaswechselventils, Gaswechselventil und Verfahren zum Herstellen des Ventilsitzrings |
| EP3667036B1 (de) | 2018-03-20 | 2022-08-31 | Nittan Corporation | Hohles auspufftellerventil |
| EP3882438A4 (de) | 2018-11-12 | 2021-11-24 | Nittan Valve Co., Ltd. | Verfahren zur herstellung eines motortellerventils |
| JP7329201B2 (ja) | 2020-03-30 | 2023-08-18 | 株式会社Nittan | エンジンのポペットバルブの製造方法 |
| JP7477724B2 (ja) * | 2021-04-30 | 2024-05-01 | 三菱重工業株式会社 | 蒸気弁 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2002849A (en) * | 1977-08-20 | 1979-02-28 | Maschf Augsburg Nuernberg Ag | I.C. engine valve assembly |
| US4485147A (en) * | 1982-09-06 | 1984-11-27 | Mitsubishi Kinzoku Kabushiki Kaisha | Process for producing a sintered product of copper-infiltrated iron-base alloy and a two-layer valve seat produced by this process |
| US4530322A (en) * | 1980-10-31 | 1985-07-23 | Nippon Kokan Kabushiki Kaisha | Exhaust valve for diesel engine and production thereof |
| US4606883A (en) * | 1983-10-21 | 1986-08-19 | J. Wizemann Gmbh & Co. | Method of manufacturing a metallic composite article |
| US4723518A (en) * | 1985-12-25 | 1988-02-09 | Toyota Jidosha Kabushiki Kaisha | Aluminum alloy cylinder head with valve seat formed integrally by copper alloy cladding layer and underlying alloy layer |
| US4836848A (en) * | 1987-03-12 | 1989-06-06 | Mitsubishi Kinzoku Kabushiki Kaisha | Fe-based sintered alloy for valve seats for use in internal combustion engines |
| US5586530A (en) * | 1993-07-20 | 1996-12-24 | Yamaha Hatsudoki Kabushiki Kaisha | Valve seat insert |
| EP0939139A2 (de) * | 1998-02-26 | 1999-09-01 | Nissan Motor Company Limited | Verschleissfeste Kupferlegierung für Auftragsschweissen auf Zylinderköpfen von Verbrennungsmotoren |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH513325A (de) * | 1969-09-24 | 1971-09-30 | Sulzer Ag | Ventilanordnung einer Kolbenbrennkraftmaschine |
| US4059876A (en) * | 1976-11-03 | 1977-11-29 | General Motors Corporation | Method of alloying and forming a valve seat |
| US4422875A (en) * | 1980-04-25 | 1983-12-27 | Hitachi Powdered Metals Co., Ltd. | Ferro-sintered alloys |
| JP3373317B2 (ja) * | 1995-02-16 | 2003-02-04 | ヤマハ発動機株式会社 | シリンダヘッドのバルブシート部構造 |
| JP3380081B2 (ja) * | 1995-03-13 | 2003-02-24 | ヤマハ発動機株式会社 | バルブシート |
| JPH08270500A (ja) * | 1995-03-31 | 1996-10-15 | Yamaha Motor Co Ltd | 内燃エンジン |
| JPH08277746A (ja) * | 1995-04-04 | 1996-10-22 | Yamaha Motor Co Ltd | 内燃エンジン |
| US5611306A (en) * | 1995-08-08 | 1997-03-18 | Fuji Oozx Inc. | Internal combustion engine valve |
| DE19912889A1 (de) * | 1999-03-23 | 2000-09-28 | Daimler Chrysler Ag | Verfahren zur Herstellung eines Ventilsitzes |
| JP4178758B2 (ja) * | 2001-02-08 | 2008-11-12 | 株式会社豊田自動織機 | バルブシートの接合構造 |
| DE10156196C1 (de) * | 2001-11-15 | 2003-01-02 | Daimler Chrysler Ag | Verfahren zur Herstellung eines Ventilsitzes |
-
2002
- 2002-11-28 DE DE10255447A patent/DE10255447A1/de not_active Ceased
-
2003
- 2003-10-21 EP EP03811739A patent/EP1565646A1/de not_active Withdrawn
- 2003-10-21 US US10/536,682 patent/US20060162686A1/en not_active Abandoned
- 2003-10-21 JP JP2004554288A patent/JP2006516313A/ja not_active Abandoned
- 2003-10-21 WO PCT/EP2003/011615 patent/WO2004048756A1/de not_active Ceased
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2002849A (en) * | 1977-08-20 | 1979-02-28 | Maschf Augsburg Nuernberg Ag | I.C. engine valve assembly |
| US4530322A (en) * | 1980-10-31 | 1985-07-23 | Nippon Kokan Kabushiki Kaisha | Exhaust valve for diesel engine and production thereof |
| US4485147A (en) * | 1982-09-06 | 1984-11-27 | Mitsubishi Kinzoku Kabushiki Kaisha | Process for producing a sintered product of copper-infiltrated iron-base alloy and a two-layer valve seat produced by this process |
| US4606883A (en) * | 1983-10-21 | 1986-08-19 | J. Wizemann Gmbh & Co. | Method of manufacturing a metallic composite article |
| US4723518A (en) * | 1985-12-25 | 1988-02-09 | Toyota Jidosha Kabushiki Kaisha | Aluminum alloy cylinder head with valve seat formed integrally by copper alloy cladding layer and underlying alloy layer |
| US4836848A (en) * | 1987-03-12 | 1989-06-06 | Mitsubishi Kinzoku Kabushiki Kaisha | Fe-based sintered alloy for valve seats for use in internal combustion engines |
| US5586530A (en) * | 1993-07-20 | 1996-12-24 | Yamaha Hatsudoki Kabushiki Kaisha | Valve seat insert |
| EP0939139A2 (de) * | 1998-02-26 | 1999-09-01 | Nissan Motor Company Limited | Verschleissfeste Kupferlegierung für Auftragsschweissen auf Zylinderköpfen von Verbrennungsmotoren |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340747C (zh) * | 2004-11-03 | 2007-10-03 | 重庆力帆实业(集团)有限公司 | 水冷双燃料发动机进气门座 |
| CN100340748C (zh) * | 2004-11-03 | 2007-10-03 | 重庆力帆实业(集团)有限公司 | 水冷双燃料发动机排气门座 |
| CN113843503A (zh) * | 2020-06-26 | 2021-12-28 | 通用汽车环球科技运作有限责任公司 | 将气门座镶圈附接至铝制气缸盖的方法 |
| CN113843503B (zh) * | 2020-06-26 | 2024-05-10 | 通用汽车环球科技运作有限责任公司 | 将气门座镶圈附接至铝制气缸盖的方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10255447A1 (de) | 2004-06-24 |
| US20060162686A1 (en) | 2006-07-27 |
| JP2006516313A (ja) | 2006-06-29 |
| EP1565646A1 (de) | 2005-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1565646A1 (de) | Ventilsitz und verfahren zur herstellung eines ventilsitzes | |
| DE69102313T2 (de) | Verfahren zum Verändern der Oberflächenqualität metallischer Gegenstände und Vorrichtung dafür. | |
| DE69229821T2 (de) | Aufschweisslegierungen auf Chrom-Basis | |
| DE60214976T2 (de) | Verschleissfeste kupferbasislegierung | |
| DE69514994T3 (de) | Taumelscheibe für taumelscheibenverdichter | |
| DE602004011631T2 (de) | Verschleissfeste legierung auf kupferbasis | |
| EP1444421B1 (de) | Verfahren zur herstellung eines ventilsitzes | |
| DE69602462T2 (de) | Ventil-Sitz für einen Zylinderkopf und Verfahren zu ihrer Herstellung | |
| EP0372223A1 (de) | Sinterwerkstoff auf Kupferbasis, dessen Verwendung sowie Verfahren zur Herstellung von Formteilen aus dem Sinterwerkstoff | |
| EP3325685B1 (de) | Verfahren zur beschichtung einer zylinderlaufbahn eines zylinderkurbelgehäuses, zylinderkurbelgehäuse mit einer beschichteten zylinderlaufbahn sowie motor | |
| DE69612134T2 (de) | Ventilsitzeinsatz | |
| EP3409801B1 (de) | Pulvermetallurgisch hergestellter, hartstoffpartikel enthaltender verbundwerkstoff, verwendung eines verbundwerkstoffs und verfahren zur herstellung eines bauteils aus einem verbundwerkstoff | |
| EP3530400A1 (de) | Verfahren zum herstellen eines bauteils, insbesondere fahrzeugbauteils, und entsprechend hergestelltes bauteil | |
| DE102018202540A1 (de) | Motorblock eines Verbrennungsmotors mit optimierten Wärmeleiteigenschaften | |
| DE10043108B4 (de) | Metallurgische Bindung von Einsätzen mit mehrlagigen Beschichtungen innerhalb von Metallgußteilen | |
| DE3730082C2 (de) | ||
| EP1304396B1 (de) | Beschichtungsverfahren | |
| DE69705671T2 (de) | Verfahren zur Verwendung von Kupfer-Basis-Elektroden für das Punktschweissen von Aluminium | |
| EP0728917B1 (de) | Auslassventil für eine Dieselbrennkraftmaschine | |
| DE19912889A1 (de) | Verfahren zur Herstellung eines Ventilsitzes | |
| DE10041974B4 (de) | Beschichtungsverfahren für Zylinderköpfe und Verwendung | |
| DE69509511T2 (de) | Hochchromhaltige Nickellegierung mit hervorragendem Widerstand gegen Verschleiss und Korrosion durch Blei sowie Motorventile | |
| WO2005012590A2 (de) | Ventilsitzringe aus co oder co/mo-basislegierungen und deren herstellung | |
| EP1127958A2 (de) | Verfahren zum Laserbeschichten einer Oberfläche | |
| DE19721406A1 (de) | Ventilsitz |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP US |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR |
|
| DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| WWE | Wipo information: entry into national phase |
Ref document number: 2004554288 Country of ref document: JP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2003811739 Country of ref document: EP |
|
| WWP | Wipo information: published in national office |
Ref document number: 2003811739 Country of ref document: EP |
|
| ENP | Entry into the national phase |
Ref document number: 2006162686 Country of ref document: US Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 10536682 Country of ref document: US |
|
| WWP | Wipo information: published in national office |
Ref document number: 10536682 Country of ref document: US |