WO2011018176A1 - Procédé de production d'un élément fritté - Google Patents

Procédé de production d'un élément fritté Download PDF

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Publication number
WO2011018176A1
WO2011018176A1 PCT/EP2010/004767 EP2010004767W WO2011018176A1 WO 2011018176 A1 WO2011018176 A1 WO 2011018176A1 EP 2010004767 W EP2010004767 W EP 2010004767W WO 2011018176 A1 WO2011018176 A1 WO 2011018176A1
Authority
WO
WIPO (PCT)
Prior art keywords
workpiece
thermal expansion
spacer
coefficient
temperature range
Prior art date
Application number
PCT/EP2010/004767
Other languages
German (de)
English (en)
Inventor
Michael Herzhoff
Lutz Dahlke
Original Assignee
Gkn Sinter Metals Holding Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gkn Sinter Metals Holding Gmbh filed Critical Gkn Sinter Metals Holding Gmbh
Publication of WO2011018176A1 publication Critical patent/WO2011018176A1/fr

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Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/06—Joining glass to glass by processes other than fusing
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/963—Surface properties, e.g. surface roughness
    • C04B2235/9638—Tolerance; Dimensional accuracy

Definitions

  • the invention relates to a method for producing a sintered component.
  • These proposed methods make it possible to reduce the dimensional dispersion and to improve the reproducibility of the sintered components produced, in particular a round neck improvement and a reduction of the diameter spread in rotationally symmetrical components and in boreholes as well as a reduction of the dimensional dispersion in open component geometries and slot geometries.
  • the invention proposes a method for producing a sintered component, wherein:
  • a workpiece is formed, which has a contact surface.
  • a spacer has a reference surface which corresponds to the contact surface
  • a thermal expansion behavior, in particular a coefficient of thermal expansion of the spacer compared to a thermal expansion behavior, in particular a coefficient of thermal expansion of the workpiece is selected and the spacer is dimensioned and / or shaped, that the contact surface rests against the reference surface at least during a partial phase of sintering.
  • the invention also proposes a method for producing a sintered component. in which:
  • a workpiece is formed, which has an internal geometry, in particular a recess
  • a thermal expansion behavior in particular a coefficient of thermal expansion of the spacer in comparison to a thermal expansion behavior, in particular a coefficient of thermal expansion of the workpiece, is selected and the spacer is dimensioned and / or shaped so that the workpiece is at least part of the internal geometry at least during a partial phase of the sintering Terns abuts the spacer.
  • the material of the spacer can be arbitrarily selected as needed and, for example, be a steel with the material number 1.4835. This material has a thermal expansion coefficient of about 19.5 x 10 -6 K "1, which is thus very much greater than that of a typical powder metallurgy green body, also referred to as a green part or pressing part and is an example of the workpiece here.
  • the thermal expansion of this spacer is greater than the total thermal expansion of that workpiece an example of an internal geometry of the workpiece is, and the spacer has a circular cylindrical mandrel, wherein in the cold state, for example, at room temperature, the outer diameter of the dome is slightly smaller than the inner diameter of the bore, so that the mandrel without contact hineinafter in the bore can grow in the sintering furnace n Un the spacer or the mandrel to a previously calculated dimension, ie in this case to a previously calculated outer diameter, and affects the internal geometry of the workpiece or the bore.
  • a thermal expansion of the spacer is greater than a total thermal expansion of the workpiece.
  • the total thermal expansion of the workpiece contains a first dimensional change, which takes place in a first temperature range and is described by a first partial thermal expansion coefficient.
  • This first dimensional change may be, for example, a growth during a first heating phase until the onset of a phase transformation. It can be provided that the first temperature range describes a first heating phase in which no volume-reducing phase transformation of the workpiece takes place.
  • the materials of the workpiece and the spacer can be arbitrarily selected as needed. For example, it may be provided that
  • the first partial thermal expansion coefficient of the workpiece is greater than or equal to 0;
  • the ratio between a coefficient of thermal expansion of the spacer and the first partial coefficient of thermal expansion of the workpiece is in the range from 0.1 to 10, preferably in the range from 0.5 to 3.5, more preferably in the range from 1 to 3.5.
  • the range limits here and below belong to the respective ranges, unless stated otherwise. If this ratio is less than or equal to 1, the abutment of the workpiece on the spacer can be achieved, for example, by volume-reducing phase transformation of the workpiece and / or volume-increasing phase transformation of the spacer. Or it can be provided, for example, that
  • the first partial thermal expansion coefficient of the workpiece is less than or equal to 0;
  • the ratio between a coefficient of thermal expansion of the spacer and the first partial coefficient of thermal expansion of the workpiece is in the range from -100 to 90.
  • Exemplary materials for such a workpiece which have a coefficient of thermal expansion less than or equal to 0, are quartz glasses and glass ceramics. If this ratio is greater than or equal to 1, the abutment of the workpiece on the spacer can be achieved, for example, by volume-reducing phase transformation of the workpiece and / or volume-increasing phase transformation of the spacer.
  • the total thermal expansion of the workpiece contains a second dimensional change, which takes place in a second temperature range and is caused by a volume-reducing phase transformation of the workpiece.
  • This second dimensional change may, for example, be a shrinkage during volume-reducing phase transformation.
  • the second temperature range describes a second heating phase in which the volume-reducing phase transformation of the workpiece takes place. It can be provided that the first temperature range is below the second temperature range.
  • the spacer can be selected as required. For example, it may be provided that the spacer in a heating phase undergoes a volume-increasing phase transformation and / or a phase-reducing phase transformation in a cooling phase. This can be achieved that the workpiece is better supported.
  • the invention moreover proposes a method for producing a sintered component, wherein:
  • a workpiece is formed, which has an outer geometry, in particular a survey
  • a thermal expansion behavior in particular a coefficient of thermal expansion of the spacer compared to a thermal expansion behavior, in particular a coefficient of thermal expansion of the workpiece is selected and the spacer is dimensioned and / or shaped that the workpiece at least with a part of the outer geometry, at least during a partial phase of sintering abuts the spacer.
  • the total thermal expansion of the workpiece contains a first dimensional change, which takes place in a first temperature range and is described by a first partial thermal expansion coefficient.
  • This first dimensional change may be, for example, a shrinkage during a cooling phase before the start of a phase transformation or after the end of a phase transformation. It can be provided that the first temperature range describes a first heating phase in which no volume-reducing phase transformation of the workpiece takes place.
  • the materials of the workpiece and the spacer can be selected as required. For example, it may be provided that
  • the first partial coefficient of thermal expansion of the workpiece is greater than or equal to
  • the ratio between a thermal expansion coefficient of the spacer and the first coefficient of partial thermal expansion of the workpiece is in the range from -10 to 10, preferably in the range from -3.6 to 2, more preferably in the range from 0.3 to 1.
  • this ratio may mean, for example, that the thermal expansion coefficient of the spacer is less than 0, so that in a heating phase, the spacer shrinks and the workpiece grows.
  • Exemplary materials for such a spacer, which have a thermal expansion coefficient less than 0, are quartz glasses and glass ceramics. If this ratio is greater than or equal to 0, this may mean, for example, that the thermal expansion coefficient of the spacer is greater than or equal to 0, so that in a heating phase, both the spacer and the workpiece grow. If this ratio is greater than or equal to 1, the abutment of the workpiece on the spacer can be achieved, for example, by volume-increasing phase transformation of the workpiece and / or volume-reducing phase transformation of the spacer.
  • the first partial coefficient of thermal expansion of the workpiece is smaller or
  • the ratio between a thermal expansion coefficient of the spacer and the first coefficient of partial thermal expansion of the workpiece is in the range of -10 to 90.
  • Exemplary materials for such a workpiece, which have a coefficient of thermal expansion of less than or equal to 0, are quartz glasses and glass ceramics. If this ratio is less than 0, this may mean, for example, that the thermal expansion coefficient of the spacer is greater than 0, so that in a heating phase Spacer grows and the workpiece shrinks. If this ratio is greater than or equal to 0, this may mean, for example, that the thermal expansion coefficient of the spacer is less than or equal to 0, so that in a heating phase, both the spacer and the workpiece shrinks. Exemplary materials for such a spacer, which have a thermal expansion coefficient of less than or equal to 0, are quartz glasses and glass ceramics.
  • the abutment of the workpiece on the spacer can be achieved, for example, by volume-increasing phase transformation of the workpiece and / or volume-reducing phase transformation of the spacer. It can be provided that the total thermal expansion of the workpiece contains a second dimensional change, which takes place in a second temperature range and is caused by a volume-reducing phase transformation of the workpiece.
  • This second dimensional change may, for example, be a shrinkage during volume-reducing phase transformation. It can be provided that the second temperature range describes a second heating phase in which the volume-reducing phase transformation of the workpiece takes place.
  • the first temperature range is below the second temperature range.
  • the material of the spacer can be arbitrarily selected as needed. For example, it can be provided that the spacer undergoes a volume-reducing phase transformation in a heating phase and / or a phase-increasing phase transformation in a cooling phase.
  • the spacer undergoes no phase transformation.
  • Such a spacer can be used several times because of the lack of phase transformation, since it can be used even if the heat treatment Process remains dimensionally stable.
  • the total thermal expansion of the workpiece contains a third dimensional change, which takes place in a third temperature range and is described by a third partial thermal expansion coefficient.
  • This third dimensional change may, for example, be a shrinkage during a first cooling phase until the onset of a phase transformation.
  • the third temperature range describes a first cooling phase in which no volume-increasing phase transformation of the workpiece takes place. It can be provided that the total thermal expansion of the workpiece contains a fourth dimensional change, which takes place in a fourth temperature range and is caused by a volume-increasing phase transformation of the workpiece.
  • this fourth dimensional change may be growth during the volume-increasing phase transformation. It can be provided that the fourth temperature range describes a second cooling phase in which the volume-increasing phase transformation of the workpiece takes place.
  • the third temperature range is above the fourth temperature range. It can be provided that the spacer is removed from the sintered workpiece.
  • the workpiece is a green or a brownling or a white or a pre-sintered part.
  • a green compact here is a workpiece of compacted or pressed powder referred to that may contain binder as needed.
  • As Braunling a metallic green compact is called after the debindering.
  • As Keling a ceramic green compact is called after debindering.
  • the precut element here is a workpiece. net, which is not completely sintered yet.
  • the spacer rests on the workpiece in a heating phase before a volume-reducing phase transformation of the workpiece takes place, and / or that the spacer separates in a cooling phase of the workpiece after a volume-increasing phase transformation of the workpiece has taken place.
  • the workpiece may preferably be formed from a powdery material.
  • the invention also proposes a spacer made of a material which does not undergo phase transformation in the temperature range used in any of the proposed methods.
  • the invention moreover proposes a spacer made of a material which undergoes a phase transformation in the temperature range which is run in a method according to one of the preceding claims.
  • Such a spacer may allow the workpiece to be better supported
  • FIG. 1 shows a sectional side view of a workpiece in a first embodiment and of a corresponding spacer in a first embodiment of the heat treatment process
  • FIG. 2 is a view taken along line H-II of FIG. 1;
  • Fig. 3 is a sectional side view of the workpiece and the spacer of
  • FIG. 4 shows a sectional side view of a workpiece in a second embodiment and of a corresponding spacer in a second embodiment at the beginning of the heat treatment process
  • Fig. 5 is a sectional view taken along line V-V of Fig. 4;
  • FIG. 6 shows the workpiece and the spacer of FIG. 6 at an elevated temperature
  • FIG. FIG. 7 is a graph illustrating the dimensions of a workpiece and a spacer that undergo a heat treatment process separately from one another depending on the temperature during the heat treatment process
  • FIG. 8 is a graph illustrating the dimension of the workpiece of FIG. 7 as a function of temperature during the heat treatment process, this workpiece and the spacer of FIG. 7 being assembled and together undergoing the heat treatment process of FIG.
  • FIGS. 1, 2 and 3 a workpiece 10 in a first embodiment and a spacer 12 in a first embodiment are shown schematically.
  • the workpiece 10 is an example of a powder metallurgical green body and has in this first embodiment an internal geometry in the form of a slot-shaped recess 14. It can be clearly seen in FIGS. 1 and 3 that the recess 14 has a rectangular cross-sectional area and thus two parallel side surfaces extending from the bottom of the recess 14 at right angles to the top of the workpiece 10. These side surfaces represent a contact surface 11 of the workpiece 10.
  • the spacer 12 is here for example made of a steel with the material number 1.4835 and has in this first embodiment, an outer geometry in the form of a survey 16. It can be clearly seen in FIGS. 1 and 3 that this elevation 16 has a rectangular cross-sectional area and thus two mutually parallel side surfaces. These side surfaces are here a reference surface 13 of the spacer 12th This R ⁇ ferenzflambas 13 corresponds to the contact surface 11, since it, when the spacer 12 has been inserted into the recess with its elevation 16 as shown in FIGS. 1 and 2, parallel to the contact surface 11.
  • the spacer 12 has in this first embodiment, a T-shaped cross-sectional area and lies with its in Figs. 1 and 3 to the left and right of the side surfaces of the elevation 16 projecting edge portions on the recess 14 delimiting edge surfaces of the top of the workpiece 10 on.
  • the elevation 16 protrudes into the recess 14.
  • the joined component is shown in the cold state at the beginning of a heat treatment process required for the sintering of the workpiece 10. It is easy to see that the thickness of the elevation 16 is smaller than the width of the depression 14, so that the contact surface 11 does not bear against the reference surface 13. The spacer 12 or the elevation 16 could thus be used without contact and without force in the internal geometry 14.
  • the heat treatment process here has a first heating phase, in which the temperature is increased to a first limit, which marks the beginning of a volume-reducing phase transformation of the workpiece 10, and thus no volume-reducing phase transformation of the workpiece 10 takes place.
  • This first limit value is typical for powder metallurgy green compacts at about 850 0 C.
  • the first heating phase can thus be described up to the first limit value by a first temperature range, for example room temperature.
  • the workpiece 10 undergoes a first dimensional change when passing through the first heating phase and has a first partial thermal expansion coefficient, which applies in the first temperature range and describes the first dimensional change. He is positive here, so the first dimensional change is growth.
  • the spacer has a thermal expansion coefficient greater than the first partial thermal expansion coefficient, so that it grows faster than the workpiece 10.
  • the coefficient of thermal expansion of the spacer 12 compared to the first partial thermal expansion coefficient of the workpiece 10 and the thickness the survey 16 compared to the width of the recess 14 selected so that the A ⁇ lageflache 11 during the dsr first Au ⁇ he'zphase be 'reaching a temperature, d'e is smaller than the first limit applies to the reference surface 13 and rests on the reference surface 13 until the end of the first heating phase This condition of the grooved component is in It can be clearly seen that both the workpiece 10 and the spacer piece 12 have grown in comparison to the cold state of FIGS.
  • the spacer piece 12 is faster than the workpiece 10. Consequently, here the thermal expansion behavior of the spacer has been established 12 is dimensioned and shaped in such a way that, at least during a partial phase of the heat treatment process, the contact surface 11 on the reference surface 13 and the workpiece 10 at least with part of the internal geometry 14 abuts the Distanzstuck 12
  • the temperature reaches the first limit value and is further increased in a subsequent second heating phase, so that at the beginning of the volume-reducing phase transformation of the workpiece 10 takes place Without the Distanzstuck 12 this phase transformation had a sudden reduction of the width of the recess 14th , So the interesting Maschinenstuckmentses result, which can be seen in Figure 7, in which the solid line to the workpiece 10 and the dashed line belongs to Distanzstuck 12 However, this reduction is prevented here by the Distanzstuck 12, yes with its reference surface 13th 8, in which the continuous line belongs to the grooved component.
  • the workpiece 10 suffers a second dimensional change, which is caused by the volume-reducing phase transformation and is a shrinkage
  • the temperature is then further increased until the maximum temperature required for the complete sintering is reached.
  • the second heating phase can thus be controlled by a second temperature range from the first limit temperature to the maximum temperature
  • the second heating phase is then followed by a first cooling phase in which the temperature is lowered to a second limit temperature at which a volume-increasing phase transformation of the workpiece 10 begins.
  • This second limit temperature holds the first cooling phase for typical powder metallurgical green compacts at about 723 ° C. can thus be described by a third temperature range from the maximum temperature to the second limit temperature.
  • the workpiece 10 with its contact surface 11 on the reference surface 13 at.
  • the second limit temperature is lowered further in a subsequent second cooling phase, for example down to room temperature, so that the volume-increasing phase transformation takes place at the beginning of the second cooling phase.
  • the workpiece dimension of interest freezes, in this case the width of the depression 14.
  • the spacer 12 shrinks back to its initial dimension of FIG. 1 and 2 and dissolves due to its greater than in the workpiece 10 thermal expansion coefficient of the workpiece 10.
  • the contact surface 1 1 is then no longer at the reference surface 13, so that the spacer 12 can be removed without contact and force-free from the sintered workpiece 10.
  • a workpiece 10 and a spacer 12 in a second embodiment are shown schematically, which is similar to the first embodiment, so that only the differences are described in more detail below.
  • the workpiece 10 has an outer geometry in the form of a burr-shaped elevation 15.
  • the elevation 15 has a rectangular cross-sectional area and thus two mutually parallel lateral surfaces extending from the upper side of the workpiece 10 at right angles.
  • these side surfaces represent the contact surface 11.
  • the spacer 12 has an internal geometry in the form of a groove-shaped depression 17.
  • this recess 17 has a rectangular cross-sectional area and thus two mutually parallel, perpendicular from the bottom of the spacer 2 upwardly extending side surfaces.
  • This side surfaces again represent the reference surface 13.
  • This reference surface 13 corresponds again to the contact surface 11, as it, when the spacer 12 has been set with its recess 17 as shown in FIGS. 4 and 5 around the elevation 15 around, parallel to the contact surface 11 extends.
  • the spacer 12 has a U-shaped cross-sectional area and rests on the upper side of the elevation 15 with its horizontal portion lying on top in FIGS. 4 and 6.
  • the elevation 15 projects into the recess 17. Consequently, also in this second embodiment, the workpiece 10 and the spacer 12 have been assembled such that the contact surface 1 1 points to the reference surface 13 and they form a joined component.
  • the joined component is shown in the cold state at the beginning of the heat treatment process described above for the first embodiment. It is easy to see that the width of the recess 17 is greater than the thickness of the elevation 15, so that the contact surface 11 is not applied to the reference surface 13. The spacer 12 or the depression 17 could thus be placed over the external geometry 15 without contact and force.
  • the spacer 12 is here for example made of a material whose coefficient of thermal expansion is smaller than the first partial thermal expansion coefficient of the workpiece 10. Consequently, as the temperature increases, the spacer grows slower than the workpiece 10 or even shrinks. Consequently, when passing through the first heating phase, the workpiece dimension of interest, which here is the thickness of the elevation 15, retrieves the corresponding reference dimension, which here is the width of the recess 17, until the contact surface 11 abuts against the reference surface 13 and until reaching the first limit temperature at the end of the first heating phase at the reference surface 13 abuts. This is shown in FIG. 6.
  • the spacer 12 is also on reaching the second limit temperature at the end of the first cooling phase and at the beginning of the second cooling phase on the workpiece 10 and resists caused by the volume-increasing phase conversion abrupt increase in the workpiece size, ie the thickness of the elevation 15. This workpiece size is again frozen after completion of the phase transformation, and upon further lowering of temperature, the contact surface 11 separates from the reference surface thirteenth

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Composite Materials (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Powder Metallurgy (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un élément fritté, selon lequel - une pièce (10) qui présente une surface d'appui (11) est formée; - un écarteur (12) présente une surface de référence (13) qui correspond à la surface d'appui (11); - la pièce (10) et l'écarteur (12) sont assemblés de telle manière que la surface d'appui (11) est orientée vers la surface de référence (13); - la pièce (10) est frittée conjointement avec l'écarteur (12); - un comportement de dilatation thermique, notamment un coefficient de dilatation thermique de l'écarteur (12) par comparaison avec un comportement de dilatation thermique, notamment un coefficient de dilatation thermique de la pièce est choisi de telle manière et l'écarteur (12) est dimensionné et/ou formé de telle manière que la surface d'appui (11) repose au moins pendant une phase partielle du frittage sur la surface de référence (13).
PCT/EP2010/004767 2009-08-11 2010-08-04 Procédé de production d'un élément fritté WO2011018176A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009036902.3 2009-08-11
DE102009036902A DE102009036902A1 (de) 2009-08-11 2009-08-11 Verfahren zur Herstellung eines Sinterbauteils

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Publication Number Publication Date
WO2011018176A1 true WO2011018176A1 (fr) 2011-02-17

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3132141C1 (de) * 1981-08-14 1982-12-16 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Verfahren zum Herstellen von Sinterteilen grosser Gennauigkeit
JPH01217186A (ja) * 1988-02-23 1989-08-30 Eagle Ind Co Ltd 中空焼結体の製造方法および治具
JPH0649505A (ja) * 1992-07-28 1994-02-22 Sumitomo Electric Ind Ltd 焼結寸法精度向上方法
JPH09263804A (ja) * 1996-03-29 1997-10-07 Olympus Optical Co Ltd 金属粉末焼結体及び金属粉末焼結体の製造方法
DE10147553A1 (de) * 2001-09-26 2003-04-10 Bleistahl Prod Gmbh & Co Kg Verfahren zur Steuerung der Sinterschwindung und Sinterverformung von Sinterwerkstoffen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10341707A1 (de) * 2003-09-10 2005-04-07 Breitwieser, Michael, Dipl.-Ing. Werkstoffe, Materialien und Körper mit einstellbarer thermischer Ausdehnung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3132141C1 (de) * 1981-08-14 1982-12-16 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Verfahren zum Herstellen von Sinterteilen grosser Gennauigkeit
JPH01217186A (ja) * 1988-02-23 1989-08-30 Eagle Ind Co Ltd 中空焼結体の製造方法および治具
JPH0649505A (ja) * 1992-07-28 1994-02-22 Sumitomo Electric Ind Ltd 焼結寸法精度向上方法
JPH09263804A (ja) * 1996-03-29 1997-10-07 Olympus Optical Co Ltd 金属粉末焼結体及び金属粉末焼結体の製造方法
DE10147553A1 (de) * 2001-09-26 2003-04-10 Bleistahl Prod Gmbh & Co Kg Verfahren zur Steuerung der Sinterschwindung und Sinterverformung von Sinterwerkstoffen

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