WO2017202998A1 - Ventilsitzring - Google Patents
Ventilsitzring Download PDFInfo
- Publication number
- WO2017202998A1 WO2017202998A1 PCT/EP2017/062681 EP2017062681W WO2017202998A1 WO 2017202998 A1 WO2017202998 A1 WO 2017202998A1 EP 2017062681 W EP2017062681 W EP 2017062681W WO 2017202998 A1 WO2017202998 A1 WO 2017202998A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve seat
- seat ring
- ring according
- functional layer
- carrier layer
- Prior art date
Links
- 239000010410 layer Substances 0.000 claims abstract description 40
- 239000002346 layers by function Substances 0.000 claims abstract description 34
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052802 copper Inorganic materials 0.000 claims abstract description 32
- 239000010949 copper Substances 0.000 claims abstract description 32
- 239000011159 matrix material Substances 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 238000005245 sintering Methods 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 229910017052 cobalt Inorganic materials 0.000 claims description 6
- 239000010941 cobalt Substances 0.000 claims description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052758 niobium Inorganic materials 0.000 claims description 5
- 239000000314 lubricant Substances 0.000 claims description 4
- 238000004663 powder metallurgy Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 2
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims 2
- 229910001845 yogo sapphire Inorganic materials 0.000 claims 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 150000004767 nitrides Chemical class 0.000 claims 1
- 239000000463 material Substances 0.000 description 25
- 239000012876 carrier material Substances 0.000 description 7
- 239000011651 chromium Substances 0.000 description 5
- 229910052750 molybdenum Inorganic materials 0.000 description 5
- 239000010955 niobium Substances 0.000 description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 229910005487 Ni2Si Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910000967 As alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MMVYPOCJESWGTC-UHFFFAOYSA-N Molybdenum(2+) Chemical compound [Mo+2] MMVYPOCJESWGTC-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- CXOWYMLTGOFURZ-UHFFFAOYSA-N azanylidynechromium Chemical compound [Cr]#N CXOWYMLTGOFURZ-UHFFFAOYSA-N 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- 238000009694 cold isostatic pressing Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012050 conventional carrier Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- XTYUEDCPRIMJNG-UHFFFAOYSA-N copper zirconium Chemical compound [Cu].[Zr] XTYUEDCPRIMJNG-UHFFFAOYSA-N 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- PEUPIGGLJVUNEU-UHFFFAOYSA-N nickel silicon Chemical group [Si].[Ni] PEUPIGGLJVUNEU-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 238000003826 uniaxial pressing Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- B22F5/10—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
-
- 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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
-
- 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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
- B22F7/064—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts using an intermediate powder layer
-
- 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
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
-
- 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
-
- 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
-
- 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
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
-
- 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 seats
- F16K25/005—Particular materials for seats or closure elements
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
-
- 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
- F01L2810/00—Arrangements solving specific problems in relation with valve gears
- F01L2810/02—Lubrication
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0469—Other heavy metals
- F05C2201/0475—Copper or alloys thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2251/00—Material properties
- F05C2251/04—Thermal properties
Definitions
- Valve seat ring The invention relates to a valve seat ring with a carrier layer and a functional layer, each with a very high thermal conductivity. Carrier layer and functional layer each have a copper base. The invention relates in particular to a valve seat ring produced by powder metallurgy.
- Valve seat rings of the type mentioned are known for example from Japanese Patent Application JP 6145720 A. This document describes a copper-infiltrated multilayer valve seat ring with Co and Mo contents for internal combustion engines.
- valve seat rings have the advantage that they have excellent strength. This can be explained in particular with the use of two different material layers.
- the carrier material has sufficient strength values while the functional material has the properties essential for the sealing function, such as wear resistance.
- valve seat rings of the type mentioned have the disadvantage that they are no longer meet the increasing demands of internal combustion engines due to their poor thermal conductivity.
- the thermal conductivity of conventional carrier materials is usually below 45 W / mK. High thermal conductivity helps to lower the valve temperature and contributes to an environmentally friendly run.
- To improve the thermal conductivity of valve seat rings it is known to infiltrate the rings produced by powder metallurgy with copper. The copper content increases the thermal conductivity, but the absorption capacity of the pores of the material for copper is limited. From DE 10 2012 013 226 A1 valve seat rings are known, which are significantly improved in terms of their thermal conductivity.
- the rings have an increased copper content in the carrier material, which is introduced via copper alloyed into the carrier matrix, sintered-in copper powder and infiltrated copper.
- the copper content can be up to 40% by weight of the carrier matrix. With this material a thermal conductivity of up to 80 W / mK can be achieved. In the functional layer can be achieved by the increased copper content, a thermal conductivity of about 50 W / mK maximum.
- thermal conductivity can no longer be achieved with conventional materials and methods.
- the carrier material must be transferred to higher heat conductive materials.
- Another problem of conventional valve seat inserts is the dissipation of heat into the cylinder head.
- an optimization of the heat flow is required, which depends on the one hand by the contact surface of the valve seat ring with the cylinder head, in particular of the carrier material with the cylinder head, on the other hand, but also by the structure of the material.
- a high porosity as well as disturbances in the material structure counteract a good heat flow.
- valve seat rings with a carrier matrix and a functional layer has proven itself.
- this allows a good dissipation of heat through a carrier matrix with high thermal conductivity.
- the conventional materials, as used for functional layers the possibilities for improvement are exhausted.
- the problem that occurs is the removal of heat from the functional layer into the cylinder head.
- the functional layer itself has only one limited contact surface with the cylinder head, so that a heat accumulation can arise here. For this reason, it is necessary to dissipate the heat through the carrier layer into the cylinder head, ie to exploit the contact surface between functional layer and carrier layer on the one hand and between carrier layer and cylinder head on the other hand for heat transfer. Here it makes sense to match the materials with regard to their thermal conductivity.
- the functional layer usually contains a hard phase, which significantly reduces the thermal conductivity. As a rule, thermal conductivities are achieved which do not exceed 50 W / mK.
- a valve seat ring For the individual layers of such a valve seat ring is basically copper as a material with high thermal conductivity. However, pure copper is not suitable because of its low strength and ductility. A copper alloy that has the requisite hardness and strength contains larger amounts of beryllium, a highly toxic metal that should not be used by special applications, such as racing, if possible. Furthermore, alumina is known as a solidifying supplement.
- valve seat ring of the aforementioned type, which provides a higher thermal conductivity over the materials. At the same time, this material should have a high heat flux. Incidentally, the valve seat ring should meet the usual requirements for tightness, dimensional stability and strength.
- the carrier layer consists of a solidified copper matrix containing 0.10 to 20 wt .-% of a solidifying component
- the functional layer also consists of a solidified copper matrix, which further 5 to 35 wt .-%, preferably 5 to 25 wt .-% of a hard phase.
- the carrier layer has a thermal conductivity which exceeds the thermal conductivity of the material used for the cylinder head, in particular more than 120 W / mK at 500 ° C.
- the functional layer should have a thermal conductivity which comes as close as possible to the thermal conductivity of the cylinder head material, that is above 50 W / mK preferably above 70 W / mK at 500 ° C. This can be achieved according to the invention but also with other materials.
- the solidifying components of the carrier layer and the functional layer may be the same or different.
- the valve seat rings according to the invention are so-called double-layer valve seat rings, in which a carrier layer is superimposed as a base with a functional layer.
- the support layer according to the invention consists of a solidified copper matrix with 0.10 to 20 wt .-%, preferably 0.25 to 15% by weight of one or more solidifying components.
- Particularly suitable solidifying components are oxides and intermetallic phases.
- Suitable solidifying oxides are, for example, alumina, silica and yttrium oxide. Furthermore, the oxides of rare earth metals and titanium dioxide may be mentioned. Preferred solidifying components are alumina, Al 2 O 3, yttria, Y 2 O 3 and titanium oxide Tio 2, which may be added to the copper in an amount of preferably 0.1 to 2.5% by weight. Such a small addition is already sufficient to increase the heat resistance of the copper. At the same time the thermal conductivity is only slightly reduced. Intermetallic phases are in particular those based on Cu, Cr, Nb, Ni, Zr and Si.
- intermetallic phases form during the cooling by precipitation from the supersaturated matrix in finely dispersed form.
- Chromium and zirconium with 0.5 to 5 wt .-% go in the same direction.
- nickel-silicon phases such as Ni2Si, NisSi or Ni3iSii2, for example in an amount of 0.5 to 5 wt .-%.
- copper-zirconium phases such as CusZr or CuZr in amounts up to 5 wt .-% is also suitable to bring about the solidification.
- silver can be mixed, which has the advantage of contributing positively to the thermal conductivity.
- the silver additive can be up to 10% by weight.
- a solidified copper matrix is used as described above, but with 5 to 35 wt .-%, preferably 5 to 25 wt .-% additionally equipped a hard phase.
- a hard phase is added as alloy powder to the copper powder, wherein the alloy powder can form intermetallic phases.
- the percentage of hard phase refers to the weight of the solidified copper matrix of the functional layer.
- the hard phase may in particular be based on iron, nickel or cobalt. Also in question are carbides, oxide ceramics or nitridic ceramics. It is essential that the hard phase is incorporated in the solidified copper matrix and provides the necessary wear resistance.
- a known iron-based hard phase can be used with cobalt, carbon, molybdenum, vanadium and tungsten.
- a cobalt hard phase with molybdenum, silicon and chromium, optionally also nickel can be used.
- carbide materials are in particular tungsten carbide, silicon carbide, titanium carbide and chromium carbide in question.
- tungsten carbide silicon carbide
- titanium carbide titanium carbide
- chromium carbide in question.
- Oxidic ceramic For example, alumina and as nitridic ceramic titanium nitride, chromium nitride and cubic boron nitride in question.
- the functional layer may contain the usual solid lubricants, for example MnS, M0S2, WS2 CaF2 or hexagonal boron nitride, usually in amounts of 0.1 to 5 wt .-%, based on the solidified copper matrix.
- solid lubricants for example MnS, M0S2, WS2 CaF2 or hexagonal boron nitride, usually in amounts of 0.1 to 5 wt .-%, based on the solidified copper matrix.
- the preferred material for solidifying the copper matrix is Al 2 O 3, which already leads in small amounts to the desired solidification.
- the hard phase those based on iron, nickel or cobalt are preferred, in particular of the tribaloy type, such as T400 and T800.
- the valve seat ring according to the invention is constructed in two layers in each case.
- the dividing line between the layers can run more or less horizontally, ie the two layers rest on one another and combine in the contact zone under pressure and temperature.
- an oblique course of the separating layer is preferred with an angle of up to 65 °, in particular from 35 ° to 65 °, wherein the carrier layer widens outwards and creates a large contact surface to the cylinder head as well as to the functional layer.
- Particularly preferred are angles of 40 ° to 55 °.
- the carrier layer of the valve seat rings according to the invention has a thermal conductivity of> 120 W / mK at 500 ° C and preferably of> 220 W / mK at 500 ° C.
- thermal conductivities of more than 300 W / mK at 500 ° C which corresponds to three to four times the thermal conductivity achievable so far.
- thermal conductivities of more than 70 to 250 W / mK at 500 ° C can be achieved, which is also far above the previously achievable values.
- the valve seat rings according to the invention may be infiltrated both in the carrier layer and in the functional layer in order to increase the thermal conductivity.
- the functional layer can also contain other additives that support the function, such as lubricants such as molybdenum sulfide or metallic additives such as molybdenum or niobium. Such additives may be present in the order of up to 15% by weight, based on the weight of the functional layer.
- Molybdenum and niobium which are added in the form of powder to the green compact to be sintered, oxidize superficially and are suitable for reducing the friction.
- copper alloys are suitable for infiltration, but also silver and silver alloys.
- valve seat rings according to the invention are produced in particular by powder metallurgy.
- the valve seat rings according to the invention can be produced by a process which comprises the compression and sintering of the corresponding powders in several steps:
- CIP cold isostatic pressing
- the sintering can also be followed by a hot isostatic process (HIP) or replace this step.
- HIP hot isostatic process
- the sintering steps take place at a temperature of for example> 850 ° C. It may be expedient to recompress the powders after the first sintering and optionally to sinter them again.
- valve seat ring 1 shows a valve seat ring 1 according to the invention in cross-section with a lower carrier layer 2 and a functional layer 3 arranged thereon.
- the dividing line between the two layers runs essentially horizontally.
- the carrier layer 2 shows a cross section through a valve seat ring 1 according to the invention with an oblique dividing line between the carrier layer 2 and the functional layer 3.
- the carrier layer 2 expands towards the outer edge and thus increases the contact area with the surrounding cylinder head. In this way, an improved heat flow is achieved in the cooled cylinder head.
- a transition region 4 in which the dividing line runs between the carrier layer 2 and the functional layer 3.
- the materials are 1. a carrier material of an oxide-reinforced copper;
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- Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Powder Metallurgy (AREA)
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Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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KR1020187033403A KR102288185B1 (ko) | 2016-05-24 | 2017-05-24 | 밸브 시트 링 |
JP2018558729A JP7071931B2 (ja) | 2016-05-24 | 2017-05-24 | バルブシートリング |
CN201780031636.4A CN109195734B (zh) | 2016-05-24 | 2017-05-24 | 阀座环 |
EP17731073.7A EP3463722A1 (de) | 2016-05-24 | 2017-05-24 | Ventilsitzring |
US16/099,615 US11311936B2 (en) | 2016-05-24 | 2017-05-24 | Valve seat ring |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016109539.7 | 2016-05-24 | ||
DE102016109539.7A DE102016109539A1 (de) | 2016-05-24 | 2016-05-24 | Ventilsitzring |
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Publication Number | Publication Date |
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WO2017202998A1 true WO2017202998A1 (de) | 2017-11-30 |
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ID=59078021
Family Applications (1)
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PCT/EP2017/062681 WO2017202998A1 (de) | 2016-05-24 | 2017-05-24 | Ventilsitzring |
Country Status (7)
Country | Link |
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US (1) | US11311936B2 (de) |
EP (1) | EP3463722A1 (de) |
JP (1) | JP7071931B2 (de) |
KR (1) | KR102288185B1 (de) |
CN (1) | CN109195734B (de) |
DE (1) | DE102016109539A1 (de) |
WO (1) | WO2017202998A1 (de) |
Cited By (1)
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CN110216277A (zh) * | 2019-06-13 | 2019-09-10 | 金堆城钼业股份有限公司 | 一种难熔金属复合管材的制备方法 |
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WO2018179590A1 (ja) | 2017-03-28 | 2018-10-04 | 株式会社リケン | 焼結バルブシート |
DE102018218241A1 (de) | 2018-10-24 | 2020-04-30 | Mahle International Gmbh | Verfahren zur Montage eines Ventilsitzrings an einem Zylinderklopf einer Brennkraftmaschine |
DE102018219686A1 (de) | 2018-11-16 | 2020-05-20 | Mahle International Gmbh | Verfahren zum Herstellen eines mit Kupfer infiltrierten Ventilsitzrings |
CN109371281B (zh) * | 2018-12-24 | 2020-10-30 | 宁波正直科技有限公司 | 一种耐高温热腐蚀的黄铜合金及其制备的火盖 |
DE102019130852A1 (de) * | 2019-11-15 | 2021-05-20 | Man Energy Solutions Se | Ventilsitzring eines Gaswechselventils und Gaswechselventil |
DE102020212371A1 (de) * | 2020-09-30 | 2022-03-31 | Mahle International Gmbh | Verfahren zum pulvermetallurgischen Herstellen eines Bauteils |
DE102020213651A1 (de) * | 2020-10-29 | 2022-05-05 | Mahle International Gmbh | Verschleißfeste, hochwärmeleitfähige Sinterlegierung, insbesondere für Lageranwendungen und Ventilsitzringe |
DE102021210268A1 (de) | 2021-09-16 | 2023-03-16 | Mahle International Gmbh | Schichtgesinterter Ventilsitzring, Verfahren zu dessen Herstellung, Kombinationen damit und deren Verwendung |
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Also Published As
Publication number | Publication date |
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JP2019520475A (ja) | 2019-07-18 |
KR102288185B1 (ko) | 2021-08-09 |
JP7071931B2 (ja) | 2022-05-19 |
EP3463722A1 (de) | 2019-04-10 |
DE102016109539A1 (de) | 2017-12-14 |
US11311936B2 (en) | 2022-04-26 |
CN109195734B (zh) | 2021-08-10 |
KR20190013753A (ko) | 2019-02-11 |
CN109195734A (zh) | 2019-01-11 |
US20190143415A1 (en) | 2019-05-16 |
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