US20060073062A1 - Component produced or processed by powder metallurgy, and process for producing - Google Patents

Component produced or processed by powder metallurgy, and process for producing Download PDF

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Publication number
US20060073062A1
US20060073062A1 US10/540,459 US54045905A US2006073062A1 US 20060073062 A1 US20060073062 A1 US 20060073062A1 US 54045905 A US54045905 A US 54045905A US 2006073062 A1 US2006073062 A1 US 2006073062A1
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US
United States
Prior art keywords
region
fluid
component
powder
tight
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.)
Abandoned
Application number
US10/540,459
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English (en)
Inventor
Dirk Naumann
Thomas Weissgarber
Alexander Bohm
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.)
Vale Canada Ltd
Original Assignee
Individual
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
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Assigned to FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DERANGEWAN DTEN FORSCHUNG E.V., INCO LIMITED reassignment FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DERANGEWAN DTEN FORSCHUNG E.V. CONFIRMATORY LICENSE (SEE DOCUMENT FOR DETAILS). Assignors: BOHM, ALEXANDER, WEISSGARBER, THOMAS, NAUMANN, DIRK
Publication of US20060073062A1 publication Critical patent/US20060073062A1/en
Priority to US11/950,448 priority Critical patent/US8802004B2/en
Assigned to VALE INCO LIMITED reassignment VALE INCO LIMITED CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: INCO LIMITED
Abandoned legal-status Critical Current

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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
    • B22F7/002—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
    • B22F7/004—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 comprising at least one non-porous part
    • 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
    • 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
    • B22F3/10—Sintering only
    • B22F3/11—Making porous workpieces or articles
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
    • B22F7/064—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts using an intermediate powder layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • the invention relates to components which are produced by powder metallurgy or alternatively are processed by powder metallurgy and have at least one porous region, which is formed from an intermetallic phase or solid solutions, or have a surface coating of this type.
  • the invention also relates to corresponding production processes.
  • processing by powder metallurgy is to be understood as meaning a corresponding, retrospective processing of semifinished products, such as for example metal foam structures, by powder metallurgy.
  • the prior art has disclosed possible ways of producing sintered porous bodies which have been formed from intermetallic phases or solid solutions.
  • a process of this type is described, for example, in DE 101 50 948.
  • a powder with a sintering activity which at least forms intermetallic phases or solid solutions to be applied to the surface of a porous base body.
  • the formation of intermetallic phases or solid solutions is supposed to be initiated by means of a heat treatment.
  • the surface area can thereby be increased.
  • the bodies produced in this way have a relatively low inherent mass and also, if suitable intermetallic phases or solid solutions are selected, a high thermal stability, they cannot readily be used for some applications. This is true in particular with regard to use as a sealing element without additional assembly or connection to components which are impervious to the various fluids.
  • the component according to the invention which is produced by powder metallurgy or is additionally processed in this way accordingly includes at least one porous region, which is formed from an intermetallic phase or solid solutions.
  • a porous region of this type may also be provided with a corresponding surface coating which is formed from an intermetallic phase or solid solutions of this type.
  • At least one areal fluid-tight region which is formed from a metal, a metal alloy of the corresponding intermetallic phase or the corresponding solid solution.
  • fluid-tight is to be understood as meaning at least imperviousness to certain liquids, but also, under certain circumstances, gas-tightness and even imperviousness to low-molecular gases or gases with a low atomic number.
  • the fluid-tight region may form part of the outer shell of the component, which the correspondingly porous region may then adjoin in one direction.
  • a fluid-tight region of this type may be surrounded by the porous region.
  • the fluid-tight region may form a type of core or alternatively a barrier within a component.
  • Nickel, aluminum molybdenum tungsten, iron, titaniunm cobalt, copper, silicon, cerium tantalum niobium, tin, zinc or bismuth can be used to form the intermetallic phases or solid solutions. It has proven particularly advantageous for at least the porous region to be made from nickel aluminide or to use a corresponding surface coating made from nickel aluminide, since this also makes it possible to achieve very good thermal stabilities.
  • the porous region may advantageously also be formed in such a way that a porosity changes in the direction of the areal, fluid-tight region. This may be effected in steps, i.e. in layers with different porosities within the individual layers, or a continuously graduated form
  • the fluid-tight region should advantageously have a density which is over 96% of the corresponding theoretical density.
  • the fluid-tight region may be formed from a pure metal or a metal alloy of the corresponding intermetallic phases or of a solid solution which is formed areally, for example in the form of a plate.
  • a porous region can be arranged on a nickel component which is, for example, of plate-like design and a porous region, which either consists of nickel aluminide or is surface-coated with nickel aluminide, can be joined by material-to-material bonding to it, as described in more detail below.
  • a passage can be used, for example, for liquid or gaseous coolant to pass through.
  • a passage of this type and adjoining openings to generate a reduced pressure all the way into the porous region, so that a sucking or vacuum action can be achieved in that region.
  • apertures can also be used to secure a component according to the invention using mechanical means.
  • a starting powder which has a sintering activity and forms intermetallic phases or solid solutions should be used at least to form an areal, fluid-tight region. This makes it possible to make use of the effect whereby an increase in volume is observed during sintering, causing sufficiently dense sintering of the corresponding region, so that the required fluid-tightness can be achieved.
  • Starting powders with a mean grain size d 50 ⁇ 50 ⁇ m should be used in particular to form the porous region during sintering, it being possible, for example, to form the stepped or graduated porous regions which have already been mentioned above to be formed by means of a suitable selection of different grain size fractions.
  • a porous region may be formed exclusively from a starting powder of this type, while an adjoining region, which is likewise porous, may be formed by means of a mixture of this starting powder with a powder which has a sintering activity and is obtained by high-energy milling, and for a fluid-tight region then to be formed exclusively by means of a starting powder which has a sintering activity and is obtained by high-energy milling.
  • a powder preform which has been prepared for the powder metallurgy production of components according to the invention may have locally differing dimensions which take account of the different starting powders and their shrinkages which are observed during sintering, so that after sintering a component which is at least near net shape can be provided, requiring at most only slight remachining.
  • regions in which the powder preform contains starting powders with a higher sintering activity such as for example powder mixtures obtained by high-energy milling, or have been formed in such regions exclusively from powders of this type with corresponding binders, are characterized by higher shrinkages, which have to be taken into account accordingly.
  • components according to the invention can be produced in such a way that a porous structure which is to form the porous region has already been areally coated with a powder which has a sintering activity and forms intermetallic phases or solid solutions. Then, the coated region can be formed in a fluid-tight manner on the corresponding surface of the components by means of a sintering operation.
  • a porous starting structure such as a semifinished product, comprising a corresponding intermetallic phase or a solid solution.
  • a porous structure likewise in the form of a semifinished product, such as a metal foam preferably a nickel foam, to be surface-coated with a powder which forms intermetallic phases or solid solutions, as is known from DE 101 50 948, and for an areal layer then additionally to be formed on a surface from a powder which has a sintering activity and forms intermetallic phases or solid solutions and which then likewise forms the fluid-tight region during sintering.
  • the porous structure i.e. the porous region of a component according to the invention, can be correspondingly modified and the fluid-tight region formed in a sintering operation.
  • a further alternative production option consists in a metallic element, which is areal and fluid-tight at least in regions and is to form the fluid-tight region, to be joined to a porous structure, which then forms the porous region, by material-to-material bonding.
  • a metallic element which is areal and fluid-tight at least in regions and is to form the fluid-tight region, to be joined to a porous structure, which then forms the porous region, by material-to-material bonding.
  • This can be achieved by means of a sintering operation in which the metallic areal element is coated beforehand with a layer of a powder which contains at least one element of the intermetallic phase or of the corresponding solid solution and forms a material-to-material bond with this powder during sintering.
  • the metallic areal element may likewise be formed from an element of the corresponding intermetallic phase or solid solution or from an alloy of this element.
  • a starting powder mixture which contains nickel and aluminum was used to produce an example of a component according to the invention.
  • the grain size fraction was in the range between 5 and 30 ⁇ m
  • a nickel to aluminum atomic ratio of 50/50 atomic % was maintained for the mixture composition.
  • the nickel and aluminum starting powders were mixed with one another for a period of 0.5 h.
  • This mixture Ml was then divided into two partial quantities.
  • One of these partial quantities was subjected to high-energy milling in a Fritsch P5 planetary ball mill at a rotational speed of 250 min/h for a period of 1 h. This resulted in a part mixture M.
  • a third part mixture M3 was produced from the mixture M1 and the mixture M2, containing these two mixtures in equal parts.
  • a nickel foam structure is surface-coated with a pure aluminum powder or a nickel-aluminum powder obtained by high-energy milling.
  • a nickel/aluminum atomic ratio in the range between 75 to 50 atomic % of nickel to 25 to 50 atomic % of aluminum was maintained.
  • the coating with a powder of this type was carried out in such a way that an open porosity of the nickel foam was retained.
  • the nickel foam body prepared in this way was then coated on one side with a powder M3 as described in Example 1, after which sintering was again carried out at a temperature of approx. 1150° C.
  • the corresponding intermetallic phases were formed on the surface of the nickel foam, and a fluid-type region comprising nickel aluminide was formed where the powder M3 was additionally applied.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Powder Metallurgy (AREA)
US10/540,459 2003-01-08 2003-12-17 Component produced or processed by powder metallurgy, and process for producing Abandoned US20060073062A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/950,448 US8802004B2 (en) 2003-01-08 2007-12-05 Component produced or processed by powder metallurgy, and process for producing it

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE103011757 2003-01-08
DE10301175A DE10301175B4 (de) 2003-01-08 2003-01-08 Verfahren zur pulvermetallurgischen Herstellung von Bauteilen
PCT/EP2003/014381 WO2004062838A2 (en) 2003-01-08 2003-12-17 Powder metallurgical production of a component having porous and non porous parts

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/950,448 Division US8802004B2 (en) 2003-01-08 2007-12-05 Component produced or processed by powder metallurgy, and process for producing it

Publications (1)

Publication Number Publication Date
US20060073062A1 true US20060073062A1 (en) 2006-04-06

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Family Applications (2)

Application Number Title Priority Date Filing Date
US10/540,459 Abandoned US20060073062A1 (en) 2003-01-08 2003-12-17 Component produced or processed by powder metallurgy, and process for producing
US11/950,448 Active 2027-04-24 US8802004B2 (en) 2003-01-08 2007-12-05 Component produced or processed by powder metallurgy, and process for producing it

Family Applications After (1)

Application Number Title Priority Date Filing Date
US11/950,448 Active 2027-04-24 US8802004B2 (en) 2003-01-08 2007-12-05 Component produced or processed by powder metallurgy, and process for producing it

Country Status (9)

Country Link
US (2) US20060073062A1 (https=)
EP (1) EP1590116A2 (https=)
JP (1) JP5143340B2 (https=)
KR (1) KR100734667B1 (https=)
CN (1) CN100519011C (https=)
AU (1) AU2003293908A1 (https=)
CA (1) CA2509941C (https=)
DE (1) DE10301175B4 (https=)
WO (1) WO2004062838A2 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9623483B2 (en) 2009-02-26 2017-04-18 Pmg Fuessen Gmbh Powder-metallurgical body and method for the production thereof

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DE102009034390B4 (de) * 2009-07-23 2019-08-22 Alantum Europe Gmbh Verfahren zur Herstellung von in Gehäuse integrierten Metallschaumkörpern
GB2523857B (en) * 2012-02-24 2016-09-14 Malcolm Ward-Close Charles Processing of metal or alloy objects
DE202014003948U1 (de) * 2014-05-13 2015-08-14 Wippermann Jr. Gmbh Rollenkette
DE102017216569A1 (de) * 2017-09-19 2019-03-21 Alantum Europe Gmbh Verfahren zur Herstellung eines offenporösen Formkörpers, der mit einem Metall gebildet ist und einen mit dem Verfahren hergestellten Formkörper

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US6241469B1 (en) * 1998-10-19 2001-06-05 Asea Brown Boveri Ag Turbine blade
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Publication number Priority date Publication date Assignee Title
US9623483B2 (en) 2009-02-26 2017-04-18 Pmg Fuessen Gmbh Powder-metallurgical body and method for the production thereof

Also Published As

Publication number Publication date
CA2509941A1 (en) 2004-07-29
WO2004062838A2 (en) 2004-07-29
WO2004062838A3 (en) 2004-12-29
AU2003293908A1 (en) 2004-08-10
KR100734667B1 (ko) 2007-07-02
DE10301175A1 (de) 2004-07-22
CA2509941C (en) 2010-09-28
CN1735473A (zh) 2006-02-15
AU2003293908A8 (en) 2004-08-10
US20080112833A1 (en) 2008-05-15
CN100519011C (zh) 2009-07-29
DE10301175B4 (de) 2006-12-07
KR20050109464A (ko) 2005-11-21
EP1590116A2 (en) 2005-11-02
JP5143340B2 (ja) 2013-02-13
US8802004B2 (en) 2014-08-12
JP2006513320A (ja) 2006-04-20

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Owner name: FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DERANGEWAN D

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