EP2948262B1 - Procédé de fabrication d'une palette destinée à une pompe à palettes - Google Patents

Procédé de fabrication d'une palette destinée à une pompe à palettes Download PDF

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Publication number
EP2948262B1
EP2948262B1 EP14705702.0A EP14705702A EP2948262B1 EP 2948262 B1 EP2948262 B1 EP 2948262B1 EP 14705702 A EP14705702 A EP 14705702A EP 2948262 B1 EP2948262 B1 EP 2948262B1
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EP
European Patent Office
Prior art keywords
vane
wing
weight
sintered part
sintering
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.)
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EP14705702.0A
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German (de)
English (en)
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EP2948262A1 (fr
Inventor
Arno Steiner
Alessandro DE NICOLÒ
Philipp NEUNHÄUSERER
Thomas OBERLEITER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GKN Powder Metallurgy Engineering GmbH
Original Assignee
GKN Sinter Metals Engineering GmbH
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Publication of EP2948262A1 publication Critical patent/EP2948262A1/fr
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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
    • 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
    • B22F7/002—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 porous nature
    • 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
    • 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
    • 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
    • B22F3/24—After-treatment of workpieces or articles
    • 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
    • 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
    • C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
    • 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
    • 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
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/286—Particular treatment of blades, e.g. to increase durability or resistance against corrosion or erosion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0088—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C18/3448—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member with axially movable vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/3441—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • F04C2/3442—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/3448—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member with axially movable vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • 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
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/248—Thermal after-treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/20—Manufacture essentially without removing material
    • F04C2230/22—Manufacture essentially without removing material by sintering

Definitions

  • the invention relates to a method for producing a vane for a vane pump.
  • the US 2009/0114046 A1 describes a vane pump with an iron-based sintered rotor and blades made of tool steel. Vanes made from SKH 51 tool steel are used as the material for the vanes of the vane pump.
  • the WO 2006/123502 A1 describes a method for producing a wing from a sintered material.
  • the wings include functionally essential radii and contours that are applied by post-processing.
  • the U.S. 4,501,613 A describes the manufacture of a sintered body, such as a compressor blade or a vane of a vane pump.
  • the U.S. 5,055,016 A relates to the manufacture of a vane compressor.
  • the wings should be made of a sintered material that has a higher carbon content.
  • the invention is based on the object of simplifying the manufacture of a vane pump.
  • the method is a method for producing an open-pored net-shape wing.
  • the wing here has at least a first end face and a second end face as well as a first side face and a second side face oriented parallel to this.
  • the second face is parallel to the first
  • metallic sintered material refers to a material with a predominantly metallic bond component that has been sintered.
  • the metallic sintered material can in particular have, for example, a sintered bronze, a sintered iron or any sintered steel.
  • metallic sintered material does not exclude the fact that further constituents, such as for example ceramics, are not at least partially present in the metallic sintered material.
  • vane refers to a small plate that can be used as a vane, in particular for a vane pump.
  • plate does not exclude the possibility that the shape of the wing deviates from a flat, planar shape.
  • the wing which is designed as a plate, has a shape that is at least derived from a parallelepiped with six surfaces. It is possible here to deviate from the shape of a parallelepiped, for example, in that two opposite surfaces of the parallelepiped are not oriented parallel to one another, but rather enclose an angle. It can also be provided that one or more surfaces of the wing are not designed as a plane.
  • Both the first side surface and the side surface oriented parallel to it are preferably designed as flat surfaces. This has the advantage that the wing can be inserted into a slot-shaped guide with correspondingly suitable dimensions, and the wing is then mounted in the slot-shaped guide, but can only be moved in one or at most two dimensions of the space.
  • the side faces oriented parallel to one another, but the first end face is also arranged in a parallel orientation to the second end face.
  • both the first end face and the second end face are designed as flat surfaces.
  • a design of the first and the second end face as flat surfaces has the advantage that the vane pump can be dimensioned in such a way that the entire first end face and the entire second end face are oriented at least almost adjacent to one another on inner surfaces of a vane pump that are parallel to one another, so that one is perpendicular to the end face, along a so-called front axle movement is avoided or at least largely avoided.
  • the wing should also encompass a first contour face and a second contour face.
  • the first contour surface and the second contour surface are distinguished in particular by the fact that the contour surface, for example for using the vane in a vane pump, can be designed in such a way that the contour surface can be optimized for running past an inside of a wall of the vane pump. Since the vane is typically moved past an inner wall of the vane pump by means of a rotational movement of a rotor of the vane pump, and the inner wall represents an inwardly curved surface from the perspective of the vane, an outwardly curved contour surface can in particular also be provided here.
  • the contour surface can be designed in such a way that two opposite edges of the contour surface are curved.
  • the contour surface it can be provided, for example, that one or both contour surfaces have a configuration of a curved rectangle.
  • first contour surface and the second contour surface have the same surface area and both contour surfaces have the same curvature, the shortest edges of the wing being curved edges.
  • first contour surface and the second contour surface are oriented parallel to one another. This results in an embodiment in which the first contour surface of the wing is curved outward and the second contour surface of the wing is curved inward, or vice versa.
  • first contour surface can also be oriented in plane mirroring to the second contour surface.
  • first contour surface is preferably mirrored on a plane whose normal vector is oriented parallel to each of the two side surfaces and to each of the two end surfaces.
  • a configuration of the wing as a body which, starting from a cuboid shape, has the two contour surfaces either curved outwards with the same radius of curvature or curved inwards, one after outwardly oriented curvature of both contour surfaces is the preferred embodiment.
  • first contour surface and / or the second contour surface may be adapted to an internal conversion, for example a vane pump, and for the first contour surface to be oriented in surface mirroring to the second contour surface.
  • a vane pump for example, a vane pump
  • Such a configuration of a vane has the advantage that, due to the high symmetry of the vane, errors in the orientation of the vane to the inner wall of the vane pump can be avoided when the vane is inserted into guides provided for this purpose in a rotor of a vane pump.
  • first contour surface is adapted to an inner wall, for example a vane pump, while the second contour surface has any configuration, for example generally a flat configuration.
  • the wing has a configuration derived from a parallelepiped designed as a parallelepiped.
  • the wing has 12 edges, three different edge lengths each being present four times.
  • the cuboid has edge lengths of axbxc, where a is the shortest edge with an edge length between 1 mm and 2 mm, c is the longest edge with an edge length between 25 mm and 30 mm and b is the medium-long edge with an edge length between 7 and 13 mm.
  • the wing is formed in that the first contour surface and the second contour surface are curved outwards, in that the shortest edge, a, is correspondingly curved and the curvature for each of the shortest edges a is identical and in each case outwards, that is away from the body, so that when looking at the body, the curvature appears as a concave curvature.
  • net-shape refers to a design of the wing in such a way that after the wing has been removed from the furnace in which the last heat treatment was carried out, no machining of the wing is necessary to develop the tolerances of the wing.
  • tolerances refers in particular to the functionally essential dimensional and shape tolerances.
  • the term net-shape should in particular not exclude the fact that the wing is deburred after the sintered part has been removed, in particular also in order to remove protruding burrs that may have arisen during pressing, for example.
  • the sintered part after the sintered part has been quenched inside the sintering furnace, the sintered part is also tempered inside the sintering furnace.
  • the sintered part is also removed as a net-shape wing after the sintered part has been tempered from the sintering furnace, it being possible to wait for the sintered part to cool down if necessary.
  • powder mixture includes, for example, a mixture of elemental powders or a mixture of compound powders, which can also be referred to as alloy powder, or a mixture of elemental and / or compound powders.
  • green compact denotes that intermediate product which is produced by pressing, but which has not yet been subjected to any specific heat treatment and, in particular, has not yet been fed to the sintering process.
  • the sintering of the green compact is carried out within a sintering furnace to form a sintered part with an austenitic structure at a temperature that is kept constant during the entire process step of the sintering which is then the sintering temperature.
  • the sintering takes place at different temperatures, for example in a sequential discrete sequence of sintering temperatures or in a continuous temperature profile or also a combination of a discrete and / or continuous temperature profile.
  • a sequence of several periods of sintering of the sintered part can also be provided, which is interrupted by other periods of time at lower temperatures which are not yet sufficient for sintering the sintered part.
  • the sintering of the green compact inside the sintering furnace to form a sintered part with an austenitic structure can take place, for example, in that a temperature provided immediately before the quenching of the sintered part for sintering inside the sintering furnace is in a stationary phase diagram in an austenitic range with that element composition which corresponds to the element composition of the powder mixture that was used to manufacture the pellet.
  • this temperature reached immediately before the quenching of the sintered part and / or one or more within the same austenitic range in the stationary phase diagram for the element composition that corresponds to the element composition of the powder mixture is maintained for a sufficiently long time to achieve a predominantly to achieve austenitic structure of the sintered part introduced into the sintering furnace as a green compact.
  • Achieving a predominantly austenitic structure relates to setting an austenitic structure in at least 50% of the volume of the sintered part.
  • At least 90% of the volume of the sintered part has an austenitic structure.
  • the method can be provided, for example, that immediately before the part is quenched, almost 100% of the volume of the sintered part has an austenitic structure.
  • the wing in which almost 100% of the part to be sintered has an austenitic structure, there is almost no retained austenite after quenching the sintered part.
  • the advantage of the absence of retained austenite is that there are no tolerance fluctuations, which means that the wing can be designed as a net-shaped wing without any further
  • the need for post-processing can be achieved in a particularly simple manner.
  • the sash may be tempered at ambient temperature. This can be the case, for example, with wings with a high proportion of light metal or light metal alloys.
  • the wing is pressed by forming the first contour surface using at least one lower punch of the powder press and the second contour surface using at least one upper punch of the powder press under pressure, and the first end surface, the second end surface, the first side surface and the second side surface can be formed by at least one die of the powder press.
  • the first contour surface and / or the second contour surface is that surface which is bounded by the shortest and the longest edge of the wing
  • the pressure exerted by the punch acts on the contour surfaces and, due to the play between the upper punch and the lower punch and the dies, press burrs arise on the edges.
  • press burrs can be removed after sintering the wing by a further process step of deburring.
  • the advantage of such deburring is, in particular, that the edges are rounded.
  • the first contour surface and / or the second contour surface is that surface which is from the are limited to the shortest and longest edge of the wing
  • the contour surfaces are formed here by the matrices. This makes it possible for one or both contour surfaces to be designed in an almost arbitrarily complex manner. Furthermore, because there is no clearance, deburring is not absolutely necessary.
  • an embodiment of the method is provided in the context of which the sintering takes place within a temperature range of 1050 ° C to 1300 ° C.
  • a stationary temperature within the temperature range of 1050 ° C. to 1300 ° C. is present during the entire duration of the sintering.
  • a temperature profile is present during the entire duration of the sintering, which occurs within the temperature price of 1050 ° C to 1300 ° C.
  • a steady temperature and / or a temperature profile between 1050 ° C. and 1300 ° C. is only present in sections during the sintering period, and that at least partially before and / or after and / or during sintering lower and / or higher temperatures can also be achieved. In the case of a specific change in the temperature, this can be set continuously or in a discrete manner.
  • the sintering takes place within a temperature range of 1100.degree. C. to 1150.degree. Sintering in this temperature range can be provided in particular for those alloys in which Mo is present as an alloying element with the highest or second highest concentration after Fe and C, if the concentration is considered as a proportion in% by weight.
  • the sintering takes place within a temperature range of 1250.degree. C. to 1300.degree. Sintering in this temperature range can be provided in particular for those alloys in which Cr is present as an alloying element with the highest or second highest concentration after Fe and C, if the concentration is considered as a percentage by weight.
  • the quenching takes place to a temperature within a temperature range of 100.degree. C. to 300.degree.
  • the quenching takes place by means of direct air blowing.
  • the advantage of quenching by means of direct air blowing is that quenching can be implemented in a particularly simple manner.
  • another advantage of quenching by blowing air is that quenching can be carried out inside the sintering furnace.
  • the sintered part is quenched to a temperature below a martensite start temperature of the sintered part in order to harden the sintered part.
  • the martensite start temperature for many of the powder mixtures described is approximately in a range between 300 ° C and 400 ° C.
  • the quenching should preferably take place at a cooling rate within a range of 0.85 ° C./second and 5.0 ° C./second. In a particularly preferred embodiment, the quenching should take place at a cooling rate within a range of 0.85 ° C./second and 2.0 ° C./second.
  • Quenching in water and / or an oil, for example, can be provided as further options for quenching.
  • the tempering of the sintered part takes place within a temperature range of 150.degree. C. to 300.degree.
  • a preferred variant of the method provides that the sintered part is tempered within a temperature range of 180.degree. C. to 240.degree.
  • the temperature and time period actually selected for the tempering, during which the tempering takes place, is in particular also dependent on the material composition.
  • the net-shape wing is deburred.
  • deburring may be necessary in particular in that embodiment of the method in which there is play in the tool during pressing.
  • Deburring can take place here, for example, by brushing, filing, grinding, milling, vibratory grinding, thermal deburring, electrochemical deburring, high-pressure water jet deburring, pressure flow, hydroerosive grinding and / or cutting.
  • the powder mixture comprises the following components: Cu 0-5.0 wt%; Mon 0.2-4.0 wt%; Ni 0-6.0 wt%; Cr 0-3.0 wt%; Si 0-2.0 wt%; Mn 0-1.0 wt%; C. 0.2-3.0% by weight and the remainder Fe.
  • the powder mixture comprises the following components: Mon 0.2-4.0 wt%; Cu 0-5.0 wt%; Ni 0-6.0 wt%; C. 0.2-2.0% by weight and the remainder Fe.
  • the powder mixture comprises the following components: Mon 1.2-1.8 wt%; Cu 1.0-3.0 wt%; C. 0.4-1.0 wt%; and the remainder Fe.
  • the powder mixture comprises the following components: Cr 0-3.0 wt%; Ni 0-3.0 wt%; Si 0-2.0 wt%; C. 0.2-3.0 wt%; Mon 0.2-2.0 wt%; and the remainder Fe.
  • the powder mixture comprises the following components: Cr 0.8-1.2 wt%; Ni 0.5-2.5 wt%; Si 0.4-0.8 wt%; C. 0.4-1.0 wt%; Mon 0.4-1.5 wt%; and the remainder Fe.
  • the powder mixture comprises the following components: Cu 1.0-3.0 wt%; Mon 1.0-2.0 wt%; C. 0.4-0.8 wt%;
  • composition of a powder mixture of components with a remainder of Fe is to be understood as meaning that, apart from small proportions of unavoidable impurities and / or compound components, no further elements and / or compounds than those specified are present in the powder mixture, i.e. Fe is 100% by weight. -% fills in missing parts.
  • pressing aids are added to the powder mixture before it is pressed.
  • Such pressing aids can be, for example, lubricants, binders and / or plasticizers.
  • These are additions to the powder mixture which, for example, facilitate the pressing of the powder mixture, simplify the ejection of the compact from the press tool and / or result in other advantageous behaviors of the powder mixture during mechanical and / or thermal action.
  • These pressing auxiliaries are not taken into account in the compositions of the powder mixtures given above.
  • the quantitative values listed for the stated compositions of the powder mixtures are therefore stated without taking into account any pressing aids that may be present, but do not exclude the fact that pressing aids are added to the stated compositions before the powder mixture is pressed.
  • the green compact is thermally treated with the aim of removing any pressing aids that may be present from the component.
  • This is a process that can also be referred to as dewaxing. It can be provided here, for example, that the green compact is dewaxed within the same sintering furnace in which the green compact is sintered. However, it can also be provided that the dewaxing is carried out in a furnace other than the sintering furnace.
  • the setting of the continuous and / or discrete temperature profile for dewaxing and / or sintering takes place in one or more stages.
  • the entire temperature profile is set in a sintering belt furnace.
  • the process step of tempering is also carried out in the same furnace as the previous process steps.
  • one possibility of implementation is to set the entire sequence of process steps for sequential implementation of the aforementioned process steps in a sintering belt furnace. It can be provided here that the entire temperature profile is set along a running direction of the components to be sintered. Likewise, however, it can also be provided that individual steps of the temperature profile are set independently of the position as a function of time. A combination of these two can also be provided.
  • Another idea relates to a vane for a vane pump.
  • the vane for a vane pump has at least a first end face and a second end face oriented parallel to this, a first side face and a second side face oriented parallel to this, as well as a first contour surface and a second contour surface.
  • the wing consists of a metallic sintered material. The surface of the wing is furthermore open-pored at least in some areas.
  • An at least regional presence of an open-pored surface of the wing is to be understood to mean that at least one of the six surfaces of the wing, i.e. at least one of the first end surface, the second end surface, the first side surface, the second side surface, the first contour surface and the second contour surface is at least partially open-pored.
  • Open-pored areas of the surface are characterized in that the surface is not completely closed, but that pores located on the surface are open to the extent customary for metallic sintered material.
  • open-pored surface can be used to designate an open-pored surface in accordance with DIN 30910 Part 3, for example.
  • the advantage of an area with a surface that is not completely closed and therefore open-pored is, in particular, that the open-pored areas of the surface can serve as a lubricating film reservoir, for example.
  • lubricating oil can be transported by means of the open-pored areas serving as lubricating film reservoirs.
  • the contour surface, which is provided for frictional contact with an inner wall of the vane pump also has open-pore areas, the lubricant contact that this creates can lead to improved lubrication over the area of the inner wall, which in particular can reduce wear.
  • At least the surfaces provided for frictional contact with an inner wall of the vane cells and both end faces are each at least partially open-pored.
  • an improved transport of lubricant can take place by means of the open-pored areas of the surface of the vane in the interior of the vane pump.
  • the surface of the wing is preferably largely open-pored.
  • a largely open-pore design of the surface of the wing is to be understood as meaning that at least 50 percent of the surface of the wing is open-pored.
  • the entire surface that is to say the surface of all lateral surfaces of the wing, is completely open-pored.
  • the surface of the wing is at least partially free of grinding marks.
  • Sanding marks are created, for example, by a targeted sanding of the surface in the course of reworking the sash to adjust the tolerances.
  • Further possible reasons for grinding are, for example, surface processing to set a correspondingly desired surface property, so that a certain surface roughness of the component can be set, for example, depending on the selected method of grinding and the abrasive. If there is a net-shape component that already has the dimensions required for use of the component without further post-processing, such grinding is not necessary, provided that the surface properties achieved make the component suitable for the application.
  • the proposed wing in the configuration described as without In addition to the saving of effort and thus costs resulting from the unnecessary grinding, there is a further advantage that possibly open-pore areas of the wing do not lose their open-pore property due to any necessary grinding for reworking.
  • the surface of the wing is preferably largely free of grinding marks.
  • the concept of a surface of the wing that is largely free of grinding marks is to be understood to mean that at least 50% of the surface of the wing is free of grinding marks.
  • the surface of the wing is completely free of grinding marks.
  • the wing has a structure which is martensitic at least up to a depth of 0.2 mm below the surface.
  • the surface of the wing here denotes the entirety of all surfaces of the wing, so that the wing has a martensitic structure over the entire surface of the wing.
  • Preferred configurations of the wing have a structure that is martensitic at least up to a depth of 0.5 mm below the surface.
  • the wing has a martensitic structure over its entire volume, that is to say that the wing is completely martensitic.
  • the martensitic structure of the wing is predominantly cubic martensitic.
  • This special embodiment of the martensitic structure has the advantage that the cubic martensitic structure, as a special case of a martensitic structure, has internal stresses only to a comparatively small extent. This results in advantages for the dimensional accuracy of the wing; in particular, the probability of changes in dimensional accuracy resulting from a reduction in internal stress is reduced.
  • a design of the wing can be provided in which the martensitic structure of the wing is completely cubic martensitic. Especially when the martensitic structure is completely cubic martensitic structure, fluctuations in tolerances are avoided as far as possible by reducing internal stresses.
  • the wing has a surface hardness with a value within a hardness range of 550 HV0.2 to 800 HV0.2.
  • the formation of the martensitic structure results in a value for the surface hardness between these values, which is comparatively high.
  • the advantage of these comparatively high hardness values is that a high degree of hardness is usually associated with a reduction in wear in the frictional contact. This means that the blades need to be replaced much less frequently.
  • a vane pump with a control ring and a rotor mounted eccentrically to the control ring in an interior of the control ring.
  • the rotor here has at least one slot-shaped guide, the slot-shaped guide preferably being arranged in the radial direction.
  • an open-pored net-shape wing is introduced into the slot-shaped guide.
  • the vane is movably mounted in the slot-shaped guide so that the vane is pressed against an inner wall of the control ring when the rotor rotates.
  • the lubricant present in the interior of the control ring comes into contact with open-pored areas of the surface of the vane, and these open-pored areas act as subsystems of a capillary system that contributes to a distribution of the lubricant within the control ring.
  • Another idea provides for the use of an open-pore net-shape vane in a vane pump.
  • This is preferably a vane pump in the form of a lubricating oil pump of a motor vehicle engine or a motor vehicle transmission.
  • an open-pored net-shape wing for example generally in pumps and / or compressors, can also be provided for other purposes.
  • the described method for producing a preferably open-pored, net-shape wing consisting of a metallic sintered material can also be provided for producing a preferably open-pored, net-shape component consisting of a metallic sintered material, with any desired components being able to be produced with this method . All of the described embodiments of the method should therefore also be able to be claimed in a general way for a completely independent of a construction of the component as a wing.
  • Fig. 1 is an exemplary representation of a possible method for producing one from a vane for a vane pump, as it is according to the prior art Technique can be done. For example, vanes for an oil pump of an 8-speed automatic transmission on the market are produced in this way.
  • a blank is punched 1 from a sheet metal.
  • this blank is a cuboid.
  • a milling 2 which is provided for forming a contour surface on one, two or even more side surfaces of the blank.
  • the design of the Fig. 1 According to the prior art, the method to be taken after removal 5 of the wing from the furnace in which the tempering 4 took place, a fine grinding 6 of the wing is carried out.
  • the surface is generally reworked, for example by deburring 7, as is the case in the illustration of the exemplary embodiment of the method shown.
  • FIG. 2 Another embodiment of a method for manufacturing a grand piano is Fig. 2 refer to.
  • the in Fig. 2 The method shown is a method for producing a blade according to the prior art, as it is made of a metallic sintered material, as is shown in FIG WO 2006/123502 A1 is described.
  • Fig. 2 differs from Fig. 1 to the effect that a blank is not punched from a sheet metal, but that instead the wing is made from a metallic sintered material.
  • a pressing 8 takes place, in the connection of which the geometry of the wing is already present, as it is desired for using the wing.
  • the wing is then sintered as a so-called compact in a sintering furnace by means of a process step of sintering 9.
  • the wing 10 is removed from the sintering furnace used for sintering 9 the wing.
  • an oven provided for this purpose hardening 11 and tempering 12 downstream of hardening 11.
  • the process steps fine grinding 13 and deburring 14 are absolutely necessary, which are arranged after the tempering 12 and a subsequent cooling.
  • Fig. 3 shows an embodiment of a method as a method for producing a wing made of a metallic sintered material.
  • a powder mixture is pressed 15 to form a green compact by means of a powder press.
  • the green compact is sintered 16 within a sintering furnace to form a sintered part with an austenitic structure.
  • This process step of sintering 16 is followed immediately by hardening 17, which is carried out within the sintering furnace.
  • it is necessary in a first step that the sintered part is largely or preferably completely austenitized.
  • Austenitization takes place by heating in a temperature range in which the powder mixture or the sintered part is in an austenitic structure or converts into one.
  • sintering 16 and austenitizing take place at least partially during sintering 16 as part of the same process, i.e. sintering of the component to be sintered takes place at a temperature at which an austenitic structure is established or an already existing one austenitic structure remains stable.
  • the sintered part is hardened by quenching the sintered part to a temperature below the martensite start temperature of the metallic sintered material. A sufficiently high quenching speed is brought about here to result in a martensitic transformation of the austenitic structure.
  • quenching to a temperature within a temperature range of 100 ° C. to 300 ° C. can take place, and this quenching can preferably take place by means of direct air blowing.
  • tempering 18 takes place, tempering 18 in the in Fig. 3
  • the embodiment shown also takes place within the sintering furnace.
  • the tempering 18 takes place by subsequent heating after the quenching, the heating having to take place at a temperature which does not yet result in a complete or partial phase transformation of the wing.
  • the last step is removal 19 of the wing, the wing being removed as a net-shaped wing, i.e. having its intended tolerances immediately after removal.
  • the possibility of removing the wing as net-shape wings is a significant innovation compared to the state of the art.
  • Fig. 4 a further embodiment of a method for producing a wing made of a metallic sintered material can be seen.
  • This in Fig. 4 The procedure shown differs from that in Fig. 3
  • sintering 21 and hardening 22 and tempering 23 which are still carried out in the sintering furnace, with the subsequent removal 24 of the wing, a final deburring 25 takes place as an additional process step.
  • Fig. 5 an embodiment of the wing for a vane pump can be found.
  • the wing 26 is shown in a plan view of a first end face 27. In each case at an angle of 90 ° to this first end face 27 and parallel to one another, a first side face 30 and, in an orientation parallel to this, a second side face 31 rest on the first end face 27.
  • the wing 26 also has a first contour surface 28 and a second contour surface 29.
  • the first contour surface 28 and the second contour surface 29 are each curved outward in the embodiment shown, the curvature being caused by a curvature of the edges which the first end surface 27 and the second end surface (not shown) with the first contour surface 28 and the second Have contour surface 29 in common.
  • the radius of curvature of these edges is the same for the first contour surface 28 and the second contour surface 29 and also for the edges common to both end surfaces.
  • Such an optimization can take place, for example, in such a way that when the first contour surface 28 or the second contour surface 29 is pressed against the inner surface of the vane pump by centrifugal force, the two spaces separated by the vane can be sealed off as tightly as possible.
  • a method step of pressing during the method for producing a wing consisting of a metallic sintered material for example according to the method shown in FIG Fig. 4 procedural sequence shown is Fig. 6 refer to.
  • the method step shown here is an exemplary embodiment for the in Fig. 4 process step shown as pressing 20.
  • the wing 32 is introduced upright in a press, so that the first contour surface 33 in the arrangement shown is formed by a lower punch 36 in accordance with the tool concept shown, while the second contour surface 34 is formed by an upper punch 37.
  • the first contour surface 33 and the second contour surface 34 are formed here by a pressure exerted by means of the lower punch 36 and the upper punch 37.
  • the first side surface and the second side surface of the wing are formed in that the first side surface and the second side surface, as well as the first end surface, which is not visible here, and the second end surface visible in plan view of the image plane, are formed by the die 35.
  • the orientation of the wing shown and the exertion of pressure by means of the lower punch 36 and the upper punch 37 on the first contour surface 33 and the second contour surface 34 results in the fact that deburring is necessary in many cases.
  • the tool used that is to say in particular the lower punch 36, the upper punch 37 and the die 35, have play with respect to one another, that is to say that the individual tools can move relative to one another.
  • Such deburring is for example in the Fig. 4 Process sequence shown as deburring 25 is shown.
  • Fig. 7 a further embodiment of a wing 38 can be seen.
  • the wing 38 is here similar to that in Fig. 6 formed wing and has in particular with that in the Fig. 6
  • the shortest contact edges are the contact edges of the first contour surface 39 with the first face 41 and the non-visible face and the contact edges of the second contour surface 40 with the first face 41 and the non-visible second face.
  • deburring as is the case, for example, in the design of the Procedure according to Fig. 4 shown as deburring 25 is necessary in many cases.
  • FIG. 8 Another embodiment of a method step of pressing for producing a wing 45 made of a metallic sintered material is shown.
  • the wing 45 is shown in the Fig. 8 oriented such that the first side surface 48 is visible in plan view.
  • the first end face 51 is formed by means of the upper punch 50 and the second end face 52 is formed by means of the lower punch 49.
  • the first contour surface 46 is formed by the die 53.
  • the pressing direction runs in the axial direction along the longitudinal axis, which is oriented parallel to the pressing direction formed by the upper punch 50 and the lower punch 49.
  • the illustrated embodiment of the method step of pressing aims in particular for a direct pressure effect on the longitudinal side of the wing 45, the longitudinal side representing the longest side of the wing 45 and, in the embodiment shown, as edge surfaces between the side surfaces 48 and the non-visible side surface with the contour surfaces 46, 47 is to be understood.
  • Another advantage of this design of the pressing process step is that in many cases deburring is not necessary, so that in the in Fig.
  • a method for producing a net-shape wing made of a metallic sintered material without deburring as a net-shape wing after removal of the sintered part is possible.
  • the in Fig. 8 The method step shown is for example a method step of pressing according to the method in Fig. 3 shown embodiment of the method for producing a wing comparable.
  • the upper pressing direction is shown by the arrow 58 and the lower pressing direction by the arrow 59 in a perspective side view.
  • the upper pressing direction here indicates the direction in which pressure is exerted on the first end face 56, while the lower pressing direction indicates the direction in which pressure is exerted on the second end face (not shown).
  • Fig. 10 is an example of a micrograph of the in Fig. 9 shown net-shape wing, i.e. after its removal, in longitudinal section.
  • the structure is martensitic, the martensitic structure being completely cubic.
  • FIG. 11 an exemplary configuration of a vane pump can be found.
  • the vane pump has a rotor 60 which is arranged within a control ring 61.
  • a number of seven wings are arranged in slot-shaped guides, for example wing 62, which is arranged in a slot-shaped guide in such a way that the first end face 63 lies in the plane of the paper, as well as the first contour surface 64 of the wing 62 on an inner wall of the control ring and is thus positioned adjacent to an inner wall of the vane pump.
  • the movable mounting of the vanes in the slot-like guides of the rotor causes a seal of the space between the first contour surface 64 and the inner wall of the vane pump when the rotor rotates and the centrifugal force acting on the vanes as a result.

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Claims (7)

  1. Procédé de fabrication d'une palette (26, 32, 38, 45, 54, 62) près des cotes, à pores ouverts, constituée d'un matériau fritté métallique pour une pompe à palettes, la notion de près des cotes se rapportant à une configuration de la palette dans laquelle, après que la palette a été prélevée d'un four dans lequel le dernier traitement thermique avait été effectué, il n'est plus nécessaire d'effectuer un usinage par enlèvement de copeaux de la palette pour assurer les tolérances de la palette, la palette (26, 32, 38, 45, 54, 62) présentant une forme qui découle au moins d'un parallélépipède à six faces et comprend au moins une première face frontale (27, 41, 51, 56, 63) et une seconde face frontale (52), orientée parallèlement à la première face frontale, ainsi qu'une première face latérale (30, 42, 48, 57) et une seconde face latérale (31) orientée parallèlement à cette dernière, et en outre la palette (26, 32, 38, 45, 54, 62) comprend une première face contournée (28, 33, 39, 46, 55) et une seconde face contournée (29, 34, 40, 47), les arêtes communes entre les faces contournées (28, 29, 33, 34, 39, 40, 46, 47, 55) et les faces frontales (30, 31, 42, 48, 57) étant les arêtes de contact les plus longues de la palette (26, 32, 38, 45, 54, 62) et les arêtes de contact les plus courtes sont les arêtes de contact des faces contournées (28, 29, 33, 34, 39, 40, 46, 47, 55) avec les faces frontales (27, 41, 51, 52, 56, 63), le procédé de fabrication de la palette (26, 32, 38, 45, 54, 62) comprenant au moins les étapes suivantes :
    - compression (8, 15, 20) d'un mélange de poudre pour obtenir un comprimé cru à l'aide d'une presse de compression de poudre,
    - frittage (9, 16, 21) du comprimé cru à l'intérieur d'un four de frittage pour obtenir une pièce frittée à structure austénitique,
    - trempe de la pièce frittée à l'intérieur du four de frittage à une température inférieure à une température martensitique de la pièce frittée, pour durcissement (3, 11, 17, 22) de la pièce frittée,
    - revenu (4, 11, 18, 23) de la pièce frittée à l'intérieur du four de frittage,
    - prélèvement (5, 10, 19, 24) de la pièce frittée, sous forme d'une palette près des cotes (26, 32, 38, 45, 54, 62), en tant que prélèvement (5, 10, 19, 24) à partir du four de frittage,
    la compression (8, 15, 20) de la palette étant réalisée par action de la pression exercée par le poinçon (36, 37, 49, 50) sur les faces contournées (28, 29, 33, 34, 39, 40, 46, 47, 55) ou sur les faces frontales (27, 41, 51, 52, 56, 63), de sorte qu'au moins la première face latérale (30, 42, 48, 57) et la seconde face latérale (31) sont réalisées par au moins une matrice (35, 53) de la presse de compression de poudre.
  2. Procédé selon la revendication 1, caractérisé en ce que le frittage (9, 16, 21) a lieu dans une plage de températures de 1 050 °C à 1 300 °C, de préférence de 1 100 °C à 1 150 °C.
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce que la trempe a lieu à une température dans une plage de températures de 100 °C à 300 °C, de préférence à l'aide d'une insufflation directe d'air.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que le revenu (4, 11, 18, 23) de la pièce frittée a lieu dans une plage de températures de 150 °C à 300 °C, de préférence dans une plage de températures de 180 °C à 240 °C.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que, après le prélèvement (5, 10, 19, 24) de la pièce frittée sous forme d'une palette près des cotes (26, 32, 38, 45, 54, 62), on procède à un ébarbage (7, 14, 25) de la palette près des cotes (26, 32, 38, 45, 54, 62).
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que le mélange de poudre comprend les constituants suivants : Cu 0 à 5,0 % en poids ; Mo 0,2 à 4,0 % en poids ; Ni 0 à 6,0 % en poids ; Cr 0 à 3,0 % en poids ; Si 0 à 2,0 % en poids ; Mn 0 à 1,0 % en poids ; C 0,2 à 3,0 % en poids,
    le reste étant constitué de Fe.
  7. Procédé selon la revendication 6, caractérisé en ce que le mélange de poudre comprend les constituants suivants : Cu 1,0 à 3,0 % en poids ; Mo 1,0 à 2,0 % en poids ; C 0,4 à 0,8 % en poids ;
    0 à 2,0 % en poids d'un ou plusieurs éléments du groupe {Ni, Cr, Si, Mn} le reste étant constitué de Fe.
EP14705702.0A 2013-01-25 2014-01-24 Procédé de fabrication d'une palette destinée à une pompe à palettes Active EP2948262B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310001246 DE102013001246A1 (de) 2013-01-25 2013-01-25 Verfahren zur Herstellung eines Flügels für eine Flügelzellenpumpe, Flügel für eine Flügelzellenpumpe sowie Flügelzellenpumpe
PCT/EP2014/000188 WO2014114461A1 (fr) 2013-01-25 2014-01-24 Procédé de fabrication d'une palette destinée à une pompe à palettes, palette destinée à une pompe à palettes, ainsi que pompe à palettes.

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EP2948262A1 EP2948262A1 (fr) 2015-12-02
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EP (1) EP2948262B1 (fr)
JP (1) JP6367235B2 (fr)
CN (1) CN105102161B (fr)
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WO (1) WO2014114461A1 (fr)

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DE102015108924B4 (de) * 2015-06-05 2017-04-13 Nidec Gpm Gmbh Mechanisch angetriebene Flüssigkeits-Verdrängerpumpe
CN106756483A (zh) * 2016-12-13 2017-05-31 安徽南方化工泵业有限公司 一种离心泵的半开式叶轮叶片
JP6944794B2 (ja) * 2017-03-02 2021-10-06 株式会社デンソー 鉄系焼結合金およびその製造方法
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US9855604B2 (en) 2018-01-02
CN105102161A (zh) 2015-11-25
CN105102161B (zh) 2017-10-10
JP6367235B2 (ja) 2018-08-01
WO2014114461A1 (fr) 2014-07-31
DE102013001246A1 (de) 2014-07-31
EP2948262A1 (fr) 2015-12-02
BR112015017659A2 (pt) 2017-07-11
JP2016511327A (ja) 2016-04-14
US20150352638A1 (en) 2015-12-10

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