EP2289653A1 - Méthode et dispositif pour le pressage isostatique à chaud d'alliages - Google Patents

Méthode et dispositif pour le pressage isostatique à chaud d'alliages Download PDF

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Publication number
EP2289653A1
EP2289653A1 EP10173057A EP10173057A EP2289653A1 EP 2289653 A1 EP2289653 A1 EP 2289653A1 EP 10173057 A EP10173057 A EP 10173057A EP 10173057 A EP10173057 A EP 10173057A EP 2289653 A1 EP2289653 A1 EP 2289653A1
Authority
EP
European Patent Office
Prior art keywords
container
powder
diffusion barrier
isostatic pressing
hot isostatic
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.)
Withdrawn
Application number
EP10173057A
Other languages
German (de)
English (en)
Inventor
George Albert Goller
Raymond Joseph Stonitsch
Timothy Eden Channel
Jason Robert Parolini
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of EP2289653A1 publication Critical patent/EP2289653A1/fr
Withdrawn legal-status Critical Current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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B22F3/15—Hot isostatic pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/1208—Containers or coating used therefor
    • B22F3/1216—Container composition
    • B22F3/1241—Container composition layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B22F3/15—Hot isostatic pressing
    • B22F2003/153—Hot isostatic pressing apparatus specific to HIP

Definitions

  • the subject matter disclosed herein relates to a method and container for forming billets using hot isostatic pressing and, more particularly, to a method and container for preventing diffusion of metals between a high value powder alloy and the container used for hot isostatic pressing.
  • Metallurgical techniques have been developed for the manufacture of a metal billet or other object from metal powders created in a predetermined particle size by e.g., microcasting or atomization. Usually highly alloyed with Ni (nickel), Cr (chromium), Co (cobalt), and Fe (iron), these powders are consolidated into a dense mass approaching 100 percent theoretical density. The resulting billets have a uniform composition and dense microstructure providing for the manufacture of components having improved toughness, strength, fracture resistance, and thermal expansion coefficients. Such improved properties can be particularly valuable in the fabrication of e.g., rotary components for a turbine where high temperatures and/or high stress conditions exist.
  • HIP hot isostatic pressing
  • the powders are placed into a container (sometimes referred to as a "can") that has been sealed and its contents placed under a vacuum.
  • the container is also subjected to an elevated temperature and pressurized on the outside using an inert gas such as e.g., argon to avoid chemical reaction.
  • an inert gas such as e.g., argon
  • temperatures as high as 480°C to 1315°C and pressures from 51 MPa to 310 MPa or even higher may be applied to process the metal powder.
  • the selected fluid medium e.g., an inert gas
  • the selected fluid medium applies pressure to the powder at all sides and in all directions.
  • the container is substantially deformed or crushed as the volume of the powder decreases during the HIP process and the container becomes joined to the surface of the billet created by the compacted powder.
  • FIGS. 1 and 2 provide an exemplary illustration of conventional containers in the HIP process.
  • FIG. 1 provides a schematic illustration of a portion of a container 101 before being subjected to the extreme temperature and pressure of the HIP process.
  • Container 101 encloses the powder mixture 105 intended for compaction and provides a seal to prevent the ingress of the fluid used for pressurization e.g., argon during the HIP process.
  • the walls 110 between top 100 and bottom 135 are basically straight and/or without deformation. Top 100 and bottom 135 are also undeformed before the HIP process. Powder 105 rests within container 101 and is not joined thereto.
  • FIG. 2 illustrates the same portion of container 101 after being subject to the HIP process.
  • the conditions of the HIP process have now converted the powder into a metal billet 106.
  • the change in density from powder to a solid metal has also resulted in a rather dramatic change in volume.
  • container 101 also deformed with the change from powder 105 to billet 106.
  • FIG. 2 illustrates that wall 110 has now taken on an e.g., an arcuate shape, and top 100 and bottom 135 may undergo deformations as well.
  • container 101 is conventionally manufactured from low carbon steel or austenitic stainless steel such as 304SS. Fe and C (carbon) can diffuse from the container into the metal powder. Conversely, Cr and other elements in the powder can diffuse into the container. Additionally, an unwanted diffusion layer containing e.g., Cr, Ni, and Fe will develop between the container and the billet. Therefore, the cross-diffusion of components creates a region of undesired compositions near the surface of the billet and also represents loss of the substantially expensive, highly alloyed powder used to create the billet.
  • the present invention provides an improved method and container for forming billets using hot isostatic pressing.
  • the method and container prevent or control the diffusion of metals between a high value powder alloy and the container used for hot isostatic pressing.
  • the present invention provides a container for compaction processing of a powder.
  • the container includes a container top, a container bottom, and an outer wall located between and connecting the container top and the container bottom to define an interior for the receipt of the powder.
  • a diffusion barrier is positioned along the container top, container bottom, and outer wall so as to separate the container from the powder during the compaction processing.
  • a container for compaction processing of a powder includes a container top, a container bottom and an outer wall located between and connecting the container top and the container bottom to define an interior for the receipt of the powder.
  • One or more of the container top, the container bottom, and the outer wall are constructed from the same alloy composition as the powder in order to prevent diffusion between the powder and the container or parts thereof.
  • one or more of the container top, the container bottom, and the outer wall are constructed from an alloy similar to the powder that does not allow for a detrimental alloy phase to form in the can/billet interface during the HIP cycle.
  • a method for improving the use of material during hot isostatic pressing includes the step of providing a container for the receipt of a powder intended for hot isostatic pressing.
  • the container includes a top, a bottom, and an outer wall connecting the top and the bottom to define an interior of the container.
  • the method also includes positioning a diffusion barrier along the container so as to separate the powder from the container during the hot isostatic pressing. A powder is inserted into the interior of the container. The container is then submitted to hot isostatic pressing while preventing or minimizing the diffusion of elements between the container and the powder.
  • the present invention provides an improved method and container for forming billets using hot isostatic pressing and, more particularly, to a method and container for preventing diffusion of metals between a high value powder alloy and the container used for hot isostatic pressing.
  • FIG. 3 An exemplary embodiment of a container 201 according to the present invention is shown in FIG. 3 .
  • one side of the container 201 is shown in cross-section.
  • Container 201 is illustrated in FIG. 3 with a powder 205 in the interior and in a condition before undergoing the deformations of the HIP process.
  • Container 201 includes a container top 200, container bottom 235, and outer wall 210.
  • container 201 may be constructed of conventional materials as previously mentioned e.g., an austenitic stainless steel such as 304SS.
  • top 200, bottom 235, and outer wall 210 are constructed as a single piece.
  • container 201 may include other constructions as well including constructions where top 200, bottom 235, and outer wall 210 are created as one or more separate components.
  • Container 201 also includes a diffusion barrier 220 separating the high value powder material 205 from the container top 200, bottom 235, and outer wall 210.
  • Diffusion barrier 220 operates to prevent diffusion and is positioned as a layer or inner liner on container 201 located between powder 205 and container 201. Diffusion barrier 220 prevents or minimizes the migration of elements from powder 205 into container 201 or from container 201 into powder 205.
  • Diffusion barrier 220 is constructed from one or more materials specifically selected to prevent the diffusion process.
  • materials may be used depending upon the composition of powder 205, container 201, and the conditions of the HIP process.
  • the diffusion barrier 220 could be constructed from various metal nitrides, sulphides, carbides, carbon nitrides or metal oxides. Ceramic material may also be used.
  • diffusion barrier 220 may be constructed from a metal alone such as e.g., tantalum, gold, silver, or copper. Other materials may be applied as well. Again, the objective of material selection for diffusion barrier 220 is to prevent or impede the diffusion of materials between container 201 and powder 205.
  • Diffusion barrier 220 may, for example, be constructed of a metal foil that is placed along the inside of the container.
  • the foil could be specifically constructed according to the geometry of container 201 or could be applied as overlapping sheets before placement of powder 205 into container 201.
  • Various plating techniques could also be used to deposit diffusion barrier 220 upon the interior of container 201.
  • electroplating or electroless plating could be used to deposit the desired thickness of barrier material as a layer 220 upon container 201.
  • Chemical vapor deposition can also used to deposit materials of the desired thickness on container 201 to create diffusion barrier 220.
  • Ceramic coating could also be applied through a variety of techniques including e.g., plasma spraying. Using the teachings disclosed herein, one of skill in the art will understand that various other methods may also be used in order to apply diffusion barrier 220.
  • a difference in composition between the material used in constructing the container and the alloy used for creating the powder mixture will provide a driving force for diffusion during the HIP process.
  • a container for HIP processing in order to prevent the unwanted cross-diffusion of components between the container and a high value powder material, can be constructed of the same alloy or a similar alloy as the high value powder material used to create the billet in the HIP process.
  • the driving force causing diffusion during the HIP process is minimized or eliminated, and a diffusion barrier such as barrier 220 may be omitted.
  • such a construction for the container could be used to eliminate a manufacturing step of removing the container from the surface of the billet.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Press Drives And Press Lines (AREA)
EP10173057A 2009-08-27 2010-08-17 Méthode et dispositif pour le pressage isostatique à chaud d'alliages Withdrawn EP2289653A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/548,715 US20110052441A1 (en) 2009-08-27 2009-08-27 Method and device for hot isostatic pressing of alloyed materials

Publications (1)

Publication Number Publication Date
EP2289653A1 true EP2289653A1 (fr) 2011-03-02

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Family Applications (1)

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EP10173057A Withdrawn EP2289653A1 (fr) 2009-08-27 2010-08-17 Méthode et dispositif pour le pressage isostatique à chaud d'alliages

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US (1) US20110052441A1 (fr)
EP (1) EP2289653A1 (fr)
JP (1) JP2011045927A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016540887A (ja) * 2013-10-17 2016-12-28 ザ エクスワン カンパニー ３次元印刷された熱間静水圧加圧成形用容器及びその製造方法
EP3094433B1 (fr) * 2014-01-14 2022-08-03 Raytheon Technologies Corporation Système et procédé pour empêcher l'épuisement/la contamination de poudres lors du processus de consolidation
KR102609282B1 (ko) * 2021-11-29 2023-12-06 한국생산기술연구원 열간 등방압 가압 분말야금용 확산 오염 방지 캐닝용기 및 이를 이용한 열간 등방압 가압 분말야금 방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1426619A (en) * 1972-06-13 1976-03-03 Asea Ab Method of sintering powder bodies in glass capsules
GB2027060A (en) * 1978-08-03 1980-02-13 Howmet Turbine Components Isostatic hot pressing metallic powder preforms
US5160794A (en) * 1989-06-08 1992-11-03 Composite Materials Technology, Inc. Superconductor and process of manufacture
JPH108109A (ja) * 1996-06-24 1998-01-13 Daido Steel Co Ltd Ｈｉｐ用缶体
DE10146986A1 (de) * 2001-09-24 2003-04-10 Schott Glas Verfahren zur Herstellung von mikrostrukturierten Prägewerkzeugen

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861839A (en) * 1973-11-08 1975-01-21 Gen Dynamics Corp Diffusion molding apparatus
JPS5857481B2 (ja) * 1981-10-24 1983-12-20 株式会社神戸製鋼所 熱間静水圧成形方法および装置
US4602952A (en) * 1985-04-23 1986-07-29 Cameron Iron Works, Inc. Process for making a composite powder metallurgical billet
US4938673A (en) * 1989-01-17 1990-07-03 Adrian Donald J Isostatic pressing with microwave heating and method for same
US6718809B1 (en) * 1998-01-10 2004-04-13 General Electric Company Method for processing billets out of metals and alloys and the article
US20050044800A1 (en) * 2003-09-03 2005-03-03 Hall David R. Container assembly for HPHT processing
US7128547B2 (en) * 2004-01-13 2006-10-31 Chien-Min Sung High pressure split die and associated methods
US7985059B2 (en) * 2006-08-31 2011-07-26 Hall David R Formable sealant barrier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1426619A (en) * 1972-06-13 1976-03-03 Asea Ab Method of sintering powder bodies in glass capsules
GB2027060A (en) * 1978-08-03 1980-02-13 Howmet Turbine Components Isostatic hot pressing metallic powder preforms
US5160794A (en) * 1989-06-08 1992-11-03 Composite Materials Technology, Inc. Superconductor and process of manufacture
JPH108109A (ja) * 1996-06-24 1998-01-13 Daido Steel Co Ltd Ｈｉｐ用缶体
DE10146986A1 (de) * 2001-09-24 2003-04-10 Schott Glas Verfahren zur Herstellung von mikrostrukturierten Prägewerkzeugen

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JP2011045927A (ja) 2011-03-10
US20110052441A1 (en) 2011-03-03

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