EP2870328B1 - Hochwärmeleitender ventilsitzring - Google Patents

Hochwärmeleitender ventilsitzring Download PDF

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Publication number
EP2870328B1
EP2870328B1 EP13737179.5A EP13737179A EP2870328B1 EP 2870328 B1 EP2870328 B1 EP 2870328B1 EP 13737179 A EP13737179 A EP 13737179A EP 2870328 B1 EP2870328 B1 EP 2870328B1
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EP
European Patent Office
Prior art keywords
copper
valve seat
seat ring
carrier
powder
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.)
Active
Application number
EP13737179.5A
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German (de)
English (en)
French (fr)
Other versions
EP2870328A1 (de
Inventor
Ekkehard KÖHLER
Dirk EMDE
Anna SEYFARTH
Thomas Lelgemann
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BLEISTAHL-PRODUKTIONS & CO KG GmbH
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Bleistahl-Produktions & Co Kg GmbH
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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
    • F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
    • 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
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/16—Both compacting and sintering in successive or repeated 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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/006—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of flat products, e.g. sheets
    • 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
    • B22F7/008—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 characterised by the composition
    • 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
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • 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
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • 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
    • 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
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel
    • F05C2201/046—Stainless steel or inox, e.g. 18-8
    • 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

  • the invention relates to a valve seat ring which is produced by powder metallurgy and has a carrier material and a functional material.
  • Valve seat rings of the type mentioned are for example from the Japanese Patent Application JP 6145720 A known. 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 excellent strength values.
  • 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 the poor thermal conductivity.
  • the thermal conductivity of conventional carrier materials is usually below 45 W / m * K.
  • valve seat ring of the aforementioned type, which has a significantly higher thermal conductivity.
  • the valve seat ring should meet the usual requirements for tightness, dimensional stability and strength.
  • the invention proposes, starting from a valve seat ring of the type mentioned above, that the carrier material of the carrier layer (2) has a thermal conductivity greater than 55 W / m * K at a total copper content> 25 to 40 wt .-%.
  • the total copper content of the valve seat rings according to the invention is preferably composed of an iron-copper alloy, added copper powder and infiltrated copper.
  • valve seat ring provides that the carrier material has a thermal conductivity greater than 65 W / m * K.
  • This variant is particularly suitable for use in turbocharged engines.
  • the combustion temperature is higher than the diesel engine.
  • the ignition temperature is about 200 to 300 ° C higher as the gasoline engine. In any case, there is a need to dissipate the high temperature quickly to prevent damage to the engine block.
  • valve seat ring provides that the carrier material has a thermal conductivity greater than 70 W / m * K. This embodiment is particularly needed in high-performance engines, such as sports cars or motorsport, when the engines are fully exploited in terms of performance. An increased thermal conductivity then increases the life of the engine.
  • the carrier material comprises an iron-copper alloy.
  • the high strength of iron and the good thermal conductivity of copper leads to particularly positive properties of the carrier material in the application.
  • the valve seat ring produced by powder metallurgy has particularly good properties when the copper content of the iron-copper alloy is above 5% by weight, in particular at 10% by weight.
  • the advantages of iron and copper are used particularly well.
  • the maximum solubility for copper in austenite at 1094 ° C is 8.5% by weight.
  • the copper can be both alloyed and diffusion bonded integrated into the iron-copper alloy. With diffusion-bonded copper, proportions of well over 8.5% by weight can be achieved.
  • an iron-copper alloy is also understood as meaning iron with diffusion-bonded copper.
  • valve seat ring provides that the carrier material is a mixture of the iron-copper alloy and copper powder.
  • the copper adheres the iron bodies and forms a cohesive matrix. Due to the increased copper content, the heat can be passed through the material particularly well. This ensures the longevity of the machine elements involved in the area of the valve seat ring.
  • a particularly good combination of thermal conductivity and strength can be achieved if the proportion of copper powder between 8 and 12, especially at 10% by weight.
  • the matrix formed by copper in this case offers a particularly good thermal conductivity, without the supporting function of the iron is significantly impaired. Due to the ever increasing performance and associated operating temperatures of engines, an increase in the thermal conductivity of valve seat rings is associated with a beneficial extension of their service life.
  • a particularly preferred variant of a valve seat ring according to the invention provides that the carrier material and / or the functional material additionally contain copper, which is supplied by infiltration.
  • the infiltration serves to fill in the pores of the green body. This happens during the sintering process.
  • the liquid copper is drawn into the pores via capillary action. While pores in sintered products usually have a heat-insulating effect, the thermal conductivity is significantly increased compared to the base material, in this case carrier and functional material. This means optimal use of the workpiece volume to optimize the thermal conductivity.
  • Powder metallurgically produced valve seat inserts with infiltrated copper contents of about 20% by weight are known per se.
  • the thermal conductivity of the valve seat ring is particularly positive when the copper content of the carrier material> 25 wt .-%, in particular between 25 to 40 wt .-%, wherein the strength properties of the iron are not lost.
  • Iron generally has a higher strength than copper, but copper has a higher thermal conductivity.
  • alloy composition for the carrier material both advantages of these metals can be combined without their disadvantages.
  • Such high copper contents of the carrier material are achieved if, in addition to the copper infiltration for the carrier material, an iron-copper alloy powder is used, to which copper powder is admixed.
  • the total copper content of the valve seat rings according to the invention is preferably> 28 to 40 wt .-%.
  • a particularly advantageous composition of the carrier material shows the following table: 0.5 to 1.5 Wt .-% C 0.1 to 0.5 Wt .-% Mn 0.1 to 0.5 Wt .-% S > 25 to 40 Wt .-% Cu (total) rest Fe.
  • the alloy composition of the functional material consists in a preferred embodiment: 0.5 to 1.2 Wt .-% C 6.0 to 12.0 Wt .-% Co 1.0 to 3.5 Wt .-% Not a word 0.5 to 3.0 Wt .-% Ni 1.5 to 5.0 Wt .-% Cr 0.1 to 1.0 Wt .-% Mn 0.1 to 1.0 Wt .-% S 8.0 to 22.0 Wt .-% Cu (infiltrated) rest Wt .-% Fe.
  • An alternative embodiment of the functional layer is composed of the following functional material: 0.5 to 1.5 Wt .-% C 5.0 to 12.0 Wt .-% Not a word 1.5 to 4.5 Wt .-% W 0.2 to 2.0 Wt .-% V 2.2 to 2.8 Wt .-% Cr 0.1 to 1.0 Wt .-% Mn 0.1 to 0.5 Wt .-% S 12.0 to 24.0 Wt .-% Cu (infiltrated) rest Wt .-% Fe.
  • the choice of materials for the functional layer depends on the requirements of the valve seat ring. If the required properties are fulfilled by the functional material, the more cost-effective variant must be chosen.
  • the functional and carrier layer have different properties. While the functional layer of the valve seat ring is designed in particular with regard to the thermal stress, the carrier layer has the necessary strength and improved thermal conductivity.
  • the carrier material consists of an iron-copper alloy powder.
  • the carrier layer is composed of an iron-copper alloy powder.
  • the iron provides the strength and the copper improves the thermal conductivity of the carrier layer.
  • the powder of the carrier layer is pressed into a semifinished product.
  • the surface inclination to the inner edge of the valve seat ring semifinished product can be adapted to the requirements.
  • the angle of inclination to the horizontal plane is taught by the invention between 20 ° and 40 °. Thus, it can be adjusted at which points the functional layer is possibly stronger or weaker. Due to the set tapered course of the carrier layer, the proportion and thus the cost of the functional layer can be reduced to a minimum.
  • This semi-finished product is covered with a powdered functional material and then pressed into a green compact.
  • This green body comes into contact with copper during the sintering process. Due to the pores of the pressed green body, the liquid copper penetrates into the workpiece by means of capillary action. By this form of copper enrichment of the workpiece, the thermal conductivity is significantly increased, while the supporting function of the carrier and functional layers is maintained.
  • a preferred embodiment of the method is that the iron-copper alloy powder of the carrier layer is combined with a copper powder, wherein the proportion of the copper powder to the total alloy is over 15 wt .-%. It has surprisingly been found that in this approach, the load-bearing properties of the iron are not lost, the thermal conductivity increases steadily through the copper. The copper powder bonds the iron-copper particles together, the latter having no unacceptable impact on the strength of the material due to the relatively low level of up to 15% by weight.
  • a particularly preferred embodiment of the method provides that the iron-copper alloy powder is combined with graphite, wherein the proportion of graphite in the total alloy is between 0.5 and 1.5 wt .-%.
  • the lubricating effect of the graphite prevents seizing of the surface of the carrier layer and thus increases the life of the valve seat ring.
  • a useful embodiment of the method is that the support layer is compressed by means of a compression pressure of 450 to 700 MPa to a density of 6.5 to 7.5 g / cm 3 to form a semifinished product.
  • valve seat ring Special and complex properties of the valve seat ring can be adjusted by the process by the green compact layered and compacted. This has two main advantages. On the one hand, a low-cost material is used at low-stress positions of the valve seat ring. On the other hand, the properties can be adjusted by alloy composition and layer thickness at different locations according to the respective requirements.
  • the sintering process takes place at a temperature greater than the melting temperature of copper. This allows copper infiltration, whereby the molten copper penetrates through the open pores into the workpiece during the sintering process by means of capillary action.
  • the copper can be fed to the green body for infiltration as a ring.
  • FIG. 1 a sectional view of a valve seat ring 1 is shown.
  • the carrier layer 2 forms the volumetric majority of the valve seat ring 1.
  • the functional layer 3 is located in the upper region of the valve seat ring 1 and essentially forms the bearing surface for valves. Clearly visible is the inclination between the carrier layer 2 and functional layer 3, which runs as parallel as possible to the support surface for the valves along the valve seat ring.
  • a diffusion layer 4 forms.
  • the diffusion layer 4 is formed in particular during sintering of the previously only pressed green body.
  • FIGS. 2 and 3 Structural receptacles of the carrier layer 2 of the valve seat ring 1 are shown.
  • FIG. 2 shows the structure of a conventional carrier layer 2 according to the prior art.
  • FIG. 3 a microstructure of the support layer 2 of a valve seat ring 1 in the context of the invention.
  • the microstructure of the support layer 2 in FIG. 3 a significantly higher proportion of copper.
  • the copper content is in the FIGS. 2 and 3 recognizable by the bright surfaces.
  • the dark areas show the proportion of iron or iron-copper content.
  • FIGS. 4 and 5 In this case, a comparison of the old (state of the art, SdT) and the new manufacturing method (teaching of the invention, LdE) of the valve seat rings 1. Die Thermal conductivity was measured by the laser flash method at the RWTH Aachen.
  • FIG. 4 shows a diagram of the thermal conductivity of finished valve seat rings 1.
  • Variant 1 has a different composition of the functional layer 3 in comparison to variant 2.
  • the functional layer 3 is assumed to be known in the prior art.
  • the composition of the carrier layer differs according to the prior art and teaching of the invention.
  • the thermal conductivity of variants 1 and 2 according to the teaching of the invention to a great extent on the thermal conductivity of variants 1 and 2 according to the prior art.
  • the FIG. 5 shows a diagram of the thermal conductivity of carrier layers 2 for two different variants of functional layers 3 of valve seat rings 1. It can be seen that the thermal conductivity of the conventional carrier layer 2 according to the prior art from 48 W / m * K decreases with increasing temperature. In contrast, the thermal conductivity of the carrier layer 2 averaged for both variants according to teaching of the invention averaged over 70 W / m * K. At a temperature of 500 ° C, the thermal conductivity of variants 1 & 2 according to the teaching of the invention (about 70 W / m * K) 46% by weight over the thermal conductivity of variants 1 & 2 according to the prior art (about 38 W / m * K).
  • the carrier layer is pressed from a carrier material at 550 MPa to a semi-finished product.
  • the carrier material consists of a combination of copper powder and iron-copper alloy powder.
  • the carrier layer has the shape of a ring having an inwardly sharply sloping tendency.
  • this semi-finished product is covered with a functional material in powder form and pressed into a green compact, whereby the functional layer is formed.
  • This green compact is sintered at 1100 ° C, with copper added in wire form. This copper melts and is pulled over the capillary action in the green process in the sintering process.
  • the finished valve seat ring has in the carrier layer an alloy composition of 1.2% by weight C, 0.3% by weight Mn, 0.2% by weight S and 35% by weight Cu and in the functional layer an alloy composition of 1.1% by weight % C, 9.7 wt% Co, 1.4 wt% Mo, 2.5 wt% Ni, 3.0 wt% Cr, 0.5 wt% Mn, 0.5 wt% S and 19.0% by weight of Cu, wherein the copper components of the iron-copper alloy, the copper powder and the copper infiltration are summarized.
  • the manufactured valve seat ring has a high strength, at the same time good thermal conductivity and lubricity.

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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)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Powder Metallurgy (AREA)
EP13737179.5A 2012-07-04 2013-07-03 Hochwärmeleitender ventilsitzring Active EP2870328B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012013226.3A DE102012013226A1 (de) 2012-07-04 2012-07-04 Hochwärmeleitender Ventilsitzring
PCT/EP2013/064000 WO2014006076A1 (de) 2012-07-04 2013-07-03 Hochwärmeleitender ventilsitzring

Publications (2)

Publication Number Publication Date
EP2870328A1 EP2870328A1 (de) 2015-05-13
EP2870328B1 true EP2870328B1 (de) 2016-11-16

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ID=48793195

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EP13737179.5A Active EP2870328B1 (de) 2012-07-04 2013-07-03 Hochwärmeleitender ventilsitzring

Country Status (8)

Country Link
US (2) US9702277B2 (enrdf_load_stackoverflow)
EP (1) EP2870328B1 (enrdf_load_stackoverflow)
JP (1) JP6297545B2 (enrdf_load_stackoverflow)
KR (1) KR102139838B1 (enrdf_load_stackoverflow)
CN (1) CN104428500B (enrdf_load_stackoverflow)
BR (1) BR112014033112B1 (enrdf_load_stackoverflow)
DE (1) DE102012013226A1 (enrdf_load_stackoverflow)
WO (1) WO2014006076A1 (enrdf_load_stackoverflow)

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JP6194613B2 (ja) 2013-03-29 2017-09-13 日立化成株式会社 摺動部材用鉄基焼結合金およびその製造方法
CN104878309A (zh) * 2015-04-29 2015-09-02 安徽同丰橡塑工业有限公司 一种汽车发动机气门座圈及其制备方法
DE102015109621A1 (de) * 2015-06-16 2016-12-22 Bleistahl-Produktions Gmbh & Co Kg. Ventilführung
DE102015211623A1 (de) * 2015-06-23 2016-12-29 Mahle International Gmbh Verfahren zur Herstellung eines Ventilsitzringes
DE102017202585A1 (de) 2016-02-17 2017-08-17 Mahle International Gmbh Brennkraftmaschine mit zumindest einem Zylinder und mit zumindest zwei Hohlkopfventilen
DE102016109539A1 (de) * 2016-05-24 2017-12-14 Bleistahl-Produktions Gmbh & Co Kg. Ventilsitzring
US10837087B2 (en) * 2016-09-28 2020-11-17 Tenneco Inc. Copper infiltrated molybdenum and/or tungsten base powder metal alloy for superior thermal conductivity
DE102017102544A1 (de) 2017-02-09 2018-08-09 Man Diesel & Turbo Se Ventilsitzring eines Gaswechselventils, Gaswechselventil und Verfahren zum Herstellen des Ventilsitzrings
JP6871361B2 (ja) * 2017-03-27 2021-05-12 日本ピストンリング株式会社 熱伝導性に優れた内燃機関用鉄基焼結合金製バルブシート
US10584618B2 (en) 2017-03-28 2020-03-10 Kabushiki Kaisha Riken Sintered valve seat
DE102017218123A1 (de) 2017-10-11 2019-04-11 Mahle International Gmbh Verfahren zum Herstellen eines Ventilsitzrings auf pulvermetallurgischem Wege
US11951547B2 (en) 2017-10-30 2024-04-09 Tpr Co., Ltd. Valve guide made of iron-based sintered alloy and method of producing same
JP7154722B2 (ja) 2018-05-15 2022-10-18 日本ピストンリング株式会社 内燃機関用鉄基焼結合金製バルブシート
JP7258601B2 (ja) * 2018-09-19 2023-04-17 日本ピストンリング株式会社 熱引け性に優れた内燃機関用鉄基焼結合金製バルブシート
US20200216935A1 (en) * 2019-01-04 2020-07-09 Tenneco Inc. Hard powder particles with improved compressibility and green strength
DE102020212371A1 (de) * 2020-09-30 2022-03-31 Mahle International Gmbh Verfahren zum pulvermetallurgischen Herstellen eines Bauteils
CN112410780B (zh) * 2020-11-17 2021-08-20 安庆帝伯粉末冶金有限公司 一种激光熔覆气门座圈及其制造方法
DE102021210268A1 (de) * 2021-09-16 2023-03-16 Mahle International Gmbh Schichtgesinterter Ventilsitzring, Verfahren zu dessen Herstellung, Kombinationen damit und deren Verwendung
KR20240021028A (ko) 2022-08-09 2024-02-16 한국생산기술연구원 고강도 고열전도성 FeCu 합금 및 이의 제조를 위한 분말야금 방법
KR20240021996A (ko) 2022-08-10 2024-02-20 한국생산기술연구원 고강도 고열전도성 FeCu 합금 및 연속 HIP 처리에 의한 그 제조 방법

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CN104428500A (zh) 2015-03-18
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US10208636B2 (en) 2019-02-19
KR20150036357A (ko) 2015-04-07
CN104428500B (zh) 2018-07-20
BR112014033112B1 (pt) 2022-02-01
EP2870328A1 (de) 2015-05-13
WO2014006076A1 (de) 2014-01-09
BR112014033112A2 (pt) 2017-06-27
US9702277B2 (en) 2017-07-11
KR102139838B1 (ko) 2020-08-11
US20170298790A1 (en) 2017-10-19
US20150322828A1 (en) 2015-11-12

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