EP2262599B1 - Endform- oder endformnahes isostatisches pulverpressverfahren - Google Patents
Endform- oder endformnahes isostatisches pulverpressverfahren Download PDFInfo
- Publication number
- EP2262599B1 EP2262599B1 EP09721920.8A EP09721920A EP2262599B1 EP 2262599 B1 EP2262599 B1 EP 2262599B1 EP 09721920 A EP09721920 A EP 09721920A EP 2262599 B1 EP2262599 B1 EP 2262599B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- powder
- insert
- containment
- helical
- net
- 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.)
- Not-in-force
Links
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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12361—All metal or with adjacent metals having aperture or cut
Definitions
- the invention relates to net-shape or near net-shape powder isostatic pressing processes, as applied to metallic and/or cermet/MMC (metal matrix composites) powder.
- the invention is concerned particularly, but not exclusively, with the production of a bore of substantial length, typically longer than 750mm, in a component of hard wear-resistant material.
- Hot Isostatic Pressing HIPing
- machining With difficulty, straight bores of small length such as 10mm can be machined.
- Prior art in relation to processes for Hot Isostatic Pressing includes US3992202 , WO9411140 , US2005/0214156 , FR2796322 and EP1657010 , but the prior art does not disclose method for the manufacture of net shaped components with helical bores using inserts which are subsequently removed.
- a method of producing a net or near net-shape component from metal powder comprises producing an insert of accurate dimensions corresponding to the dimensions of a bore to be created in the finished component, the bore having a length of at least 750mm, supporting the insert within a mould cavity, filling the mould cavity with metal powder, subjecting the powder to isostatic pressing, and subsequently removing the material of the insert.
- the mould may be an independent mould that is removed after an initial step to bind the powder together into a pre-form, and the pre-form is then encapsulated in a suitable containment which may be a canister or a sprayed coating, or a canister of suitable internal shape may be used as the mould, and the canister itself is evacuated prior to HIPing
- the insert is supported in position in the mould cavity by a plurality of formers of a material that is compatible with the finally consolidated powder.
- the insert may be a metallic insert of a material that is subsequently removable by chemical etching, preferably copper.
- the chemical etching may be assisted by electrolytic reaction.
- the insert need only be coated with a material that can subsequently be removed by etching, in order to release the insert, which can then be extracted.
- the metallic insert is coated with a suitable material that provides a diffusion barrier to prevent the material of the insert from diffusing by atomic diffusion into the powder being consolidated during HIPing.
- the invention can enable a helical bore to be provided in a component.
- Such a helical bore could be used for various purposes, such as to convey a fluid and/or to accommodate an electrical or fibre-optic cable to provide sensor or control system communications for example.
- a copper rod of a diameter in the range of 6 to 10 mm for example and of length greater than 2m, is first bent into a helix of the required dimensions and this is then held in position in a powder containment prior to filling the containment with powder.
- the containment enclosing the powder, rod and former, is then consolidated by solid state diffusion using the HIPing method.
- the diffusion barrier may be Al 2 O 3 applied by vapour phase deposition or by high velocity spraying.
- the diffusion barrier may be created by applying boron nitride as an aqueous solution by spraying.
- a preformed metal tube of 6mm to 10mm diameter for example, is filled with ceramic particles and is bent to a helical shape and placed within the powder containment prior to filling the containment with powder.
- the tube is held in position with formers compatible with the finally consolidated powder.
- the entire containment encompassing the metallic and/or cermet/MMC powder is then consolidated by solid state diffusion using the HIPing method.
- the metal tube may become totally diffusion bonded into the consolidated component but the ceramic particles will remain in the pre-process particle form and thereby can be removed mechanically via vibration techniques to leave a clean hole through the component.
- the invention can be used to provide one or more holes in one or more helical lobes provided internally of the stator body of a helicoidal positive displacement pump, the stator body having a length of as much as 2m or more.
- Such stator bodies can be used to form the radially outer part of a linear motor and/or mud pump used in down-hole drilling.
- the hole or holes can be positioned to follow the core of a helical flute, which may have a pitch of about 1m and a radius of 50mm about the body axis.
- the helical lobes are defined by helical grooves in a mandrel that is positioned in the mould during pressing of the stator body.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Claims (11)
- Verfahren zum Produzieren einer endkonturgetreuen oder endkonturnahen Komponente, die mit einer schraubenförmigen Bohrung versehen wird, aus Metallpulver, das aus Folgendem besteht: Produzieren eines Einsatzes mit genauen Abmessungen, die den Abmessungen einer in der fertigen Komponente zu erzeugenden schraubenförmigen Bohrung entspricht, wobei die Bohrung eine Länge von mindestens 750 mm aufweist, Stützen des Einsatzes innerhalb einer Formkavität, Füllen der Formkavität mit Metallpulver, Unterwerfen des Pulvers einem isostatischen Pressen, und anschließend Entfernen des Materials des Einsatzes, wobei der Einsatz ein metallischer Einsatz aus Kupfer ist, das anschließend durch chemisches Ätzen entfernbar ist, und der Einsatz mit einem Material überzogen ist, dass eine Diffusionsbarriere bereitstellt, um zu verhindern, dass das Kupfer des Einsatzes durch atomare Diffusion in das Pulver, das während HiPing konsolidiert wird, diffundiert.
- Verfahren gemäß Anspruch 1, bei dem die Form eine unabhängige Form ist, die nach dem anfänglichen Schritt entfernt wird, um das Pulver in einer Vorform zusammenzubinden, und die Vorform dann in eine geeignete Einfassung eingekapselt wird.
- Verfahren gemäß Anspruch 2, bei dem die Einfassung ein Kanister ist.
- Verfahren gemäß Anspruch 2, bei dem die Einfassung ein gespritzter Überzug ist.
- Verfahren gemäß Anspruch 1 oder Anspruch 2, bei dem der Einsatz in der Formkavität durch eine Vielzahl von Formern eines Materials, das mit dem abschließend konsolidierten Pulver kompatibel ist, in Position gestützt wird.
- Verfahren gemäß Anspruch 1, bei dem das chemische Ätzen durch elektrolytische Reaktion unterstützt wird.
- Verfahren gemäß einem der vorhergehenden Ansprüche, bei dem der Einsatz mit einem Material überzogen wird, das der Entfernung durch Ätzen zugänglich ist, und das die Schritte des Lösens des Einsatzes durch Ätzen des Überzugs und dann des Extrahierens des Einsatzes beinhaltet.
- Verfahren gemäß Anspruch 1, bei dem die Diffusionsbarriere Al2O3 beinhaltet, das durch Dampfphasenabscheidung oder Hochgeschwindigkeitsspritzen aufgebracht wird.
- Verfahren gemäß Anspruch 1, bei dem die Diffusionsbarriere durch Aufbringen von Bornitrid als eine wässrige Lösung durch Spritzen erzeugt wird.
- Verfahren gemäß Anspruch 1 bei dem der Einsatz produziert wird, indem eine Kupferstange, mit einem Durchmesser im Bereich 6 bis 10 mm und einer Länge größer als 2 m genommen wird, die Kupferstange in eine Schraubenform mit den erforderlichen Abmessungen gebogen wird, und dann die schraubenförmige Stange in einer Pulvereinfassung in Position gehalten wird, bevor die Einfassung mit Pulver gefüllt wird, die Einfassung das Pulver, die Stange und den Former einschließt, und dann das Pulver durch Feststoffdiffusion mittels eines HIPing-Verfahrens konsolidiert wird.
- Verfahren gemäß Anspruch 1, bei dem der Einsatz produziert wird, indem ein vorgeformtes Metallrohr, mit 6 mm bis 10 mm Durchmesser, genommen wird, das Rohr mit keramischen Teilchen gefüllt wird, und dann das gefüllte Rohr auf eine schraubenförmige Form gebogen wird, das schraubenförmige gefüllte Rohr in der Pulvereinfassung platziert wird, bevor die Einfassung mit Pulver gefüllt wird, das Rohr mit Formern in Position gehalten wird, die mit dem abschließend konsolidierten Pulver kompatibel sind, eine Einfassung bereitgestellt wird, die das metallische und/oder Zement-/MMC-Pulver umschließt, das enthaltene Material durch Feststoffdiffusion mittels eines HIPing-Verfahrens konsolidiert wird und dann die keramischen Teilchen mechanisch durch eine Vibrationstechnik entfernt werden, um ein reines Loch durch die fertige Komponente zu hinterlassen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0805242.5A GB0805242D0 (en) | 2008-03-20 | 2008-03-20 | Net-shape or near net-shape powder isostatic pressing process |
PCT/GB2009/000757 WO2009115821A1 (en) | 2008-03-20 | 2009-03-20 | Net-shape or near net-shape powder isostatic pressing process |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2262599A1 EP2262599A1 (de) | 2010-12-22 |
EP2262599B1 true EP2262599B1 (de) | 2014-11-12 |
Family
ID=39386561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09721920.8A Not-in-force EP2262599B1 (de) | 2008-03-20 | 2009-03-20 | Endform- oder endformnahes isostatisches pulverpressverfahren |
Country Status (9)
Country | Link |
---|---|
US (1) | US20110033725A1 (de) |
EP (1) | EP2262599B1 (de) |
CN (1) | CN102026752A (de) |
BR (1) | BRPI0909088A2 (de) |
EA (1) | EA019527B1 (de) |
ES (1) | ES2530092T3 (de) |
GB (1) | GB0805242D0 (de) |
MX (1) | MX2010010146A (de) |
WO (1) | WO2009115821A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0922488D0 (en) * | 2009-12-23 | 2010-02-03 | Advanced Interactive Materials | Improvements in or relating to hot isostatic pressing |
CN102366836B (zh) * | 2011-10-25 | 2013-08-14 | 航天材料及工艺研究所 | 一种高性能钛合金盲管的制造方法 |
CN103586468B (zh) * | 2013-11-08 | 2015-04-15 | 中国航空工业集团公司北京航空材料研究院 | 一种TiAl合金粉末近净成型的方法 |
CN104972114A (zh) * | 2014-04-25 | 2015-10-14 | 华中科技大学 | 一种具有特殊功能层复杂零件的热等静压一体化成形方法 |
JP6417586B2 (ja) * | 2014-08-25 | 2018-11-07 | セイコーエプソン株式会社 | 造形方法および造形物 |
CN105458265B (zh) * | 2015-11-14 | 2018-07-31 | 华中科技大学 | 一种可回收重复使用的热等静压用控型模芯、其制造方法及其应用 |
CN108421980B (zh) * | 2018-03-16 | 2019-07-19 | 华中科技大学 | 一种基于增材制造的热等静压成形方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3975121A (en) * | 1973-11-14 | 1976-08-17 | Smith International, Inc. | Wafer elements for progressing cavity stators |
ZA79440B (en) * | 1978-02-10 | 1980-09-24 | Oakes Ltd E T | Drive arrangement |
JPH0723486B2 (ja) * | 1987-06-17 | 1995-03-15 | 株式会社神戸製鋼所 | 多軸複合シリンダの製造法 |
US5171139A (en) * | 1991-11-26 | 1992-12-15 | Smith International, Inc. | Moineau motor with conduits through the stator |
US5832604A (en) * | 1995-09-08 | 1998-11-10 | Hydro-Drill, Inc. | Method of manufacturing segmented stators for helical gear pumps and motors |
KR100502986B1 (ko) * | 1996-04-15 | 2005-10-05 | 디나 메트 홀딩즈 인코포레이티드 | 네트쉐이프다이와주형및그제조방법 |
US5822853A (en) * | 1996-06-24 | 1998-10-20 | General Electric Company | Method for making cylindrical structures with cooling channels |
JPH1121116A (ja) * | 1997-06-30 | 1999-01-26 | Nippon Steel Corp | 窒化ホウ素で被覆された炭素質粉末および炭素質繊維 |
SE519139C2 (sv) * | 1998-05-12 | 2003-01-21 | Hans Goeran Ohlsson | Metod att bilda hål eller håligheter i sintrade och bearbetade metallföremål |
US6241494B1 (en) * | 1998-09-18 | 2001-06-05 | Schlumberger Technology Company | Non-elastomeric stator and downhole drilling motors incorporating same |
US6837915B2 (en) * | 2002-09-20 | 2005-01-04 | Scm Metal Products, Inc. | High density, metal-based materials having low coefficients of friction and wear rates |
US7739792B2 (en) * | 2006-07-31 | 2010-06-22 | Schlumberger Technology Corporation | Method of forming controlled thickness resilient material lined stator |
-
2008
- 2008-03-20 GB GBGB0805242.5A patent/GB0805242D0/en not_active Ceased
-
2009
- 2009-03-20 US US12/736,207 patent/US20110033725A1/en not_active Abandoned
- 2009-03-20 EA EA201001527A patent/EA019527B1/ru not_active IP Right Cessation
- 2009-03-20 BR BRPI0909088A patent/BRPI0909088A2/pt not_active IP Right Cessation
- 2009-03-20 EP EP09721920.8A patent/EP2262599B1/de not_active Not-in-force
- 2009-03-20 ES ES09721920.8T patent/ES2530092T3/es active Active
- 2009-03-20 CN CN2009801098127A patent/CN102026752A/zh active Pending
- 2009-03-20 MX MX2010010146A patent/MX2010010146A/es unknown
- 2009-03-20 WO PCT/GB2009/000757 patent/WO2009115821A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
US20110033725A1 (en) | 2011-02-10 |
EP2262599A1 (de) | 2010-12-22 |
WO2009115821A1 (en) | 2009-09-24 |
ES2530092T3 (es) | 2015-02-26 |
MX2010010146A (es) | 2010-10-20 |
BRPI0909088A2 (pt) | 2015-09-29 |
EA201001527A1 (ru) | 2011-04-29 |
CN102026752A (zh) | 2011-04-20 |
GB0805242D0 (en) | 2008-04-30 |
EA019527B1 (ru) | 2014-04-30 |
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