EP0232336A1 - Auf pulvermetallurgischem wege hergestellte bauteile - Google Patents
Auf pulvermetallurgischem wege hergestellte bauteileInfo
- Publication number
- EP0232336A1 EP0232336A1 EP86904764A EP86904764A EP0232336A1 EP 0232336 A1 EP0232336 A1 EP 0232336A1 EP 86904764 A EP86904764 A EP 86904764A EP 86904764 A EP86904764 A EP 86904764A EP 0232336 A1 EP0232336 A1 EP 0232336A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- preform
- furnace
- sintering
- green body
- container
- 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- Withdrawn
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
- 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
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
-
- 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
-
- 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
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
-
- 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
- B22F5/04—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of turbine blades
-
- 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
- B22F2003/1042—Sintering only with support for articles to be sintered
-
- 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
Definitions
- the invention relates to components produced by powder metallurgy, in particular by injection molding or injection molding.
- components in particular high-temperature-resistant components that are injection-molded or dry-pressed and sintered, or at least capable of being sintered, these are shaped e.g. on plates, laid on or in powder or similar embedded.
- the sintering usually follows after the binder has been burned out or evaporated and mixed with the metallic alloy as the starting powder.
- the components have only an extremely low strength during the expulsion of the binder and are very sensitive to any kind of contact, so they must be worn or covered or otherwise protected by the pads / underlays / intermediate layers or embedding material. As a result, the sintering process is hindered, and friction occurs at the contact points, the forces of which counteract the shrinkage forces. Also the risk of chemical reactions on the Contact points or contact areas is at the high
- the object of the invention is to contribute to the creation of components which are temperature-resistant, true to shape or true to shape, i.e. are true to size and have a smooth surface without cracks.
- the main advantage of the invention is i.a. to be seen in the fact that even when the binder is expelled after the shaping, a high dimensional stability of the components is already guaranteed. They are easy to handle and have the desired properties, see above.
- FIG. 1 shows an injection-molded metal sample in its treatment chamber, here: container of an oven
- Fig. 2 shows an injection molded metal scoop in its treatment chamber, here: container of an oven
- Fig. 3b sample sintered according to Fig. 2o
- Fig. 4 sample partially surrounded by current-carrying coil
- Fig. 10 sample in powder. Sintering in the temperature time program.
- Fig. 2o sample freely accessible. Sintering in the temperature program.
- the powder metallurgical starting material in particular a globular powder of a nickel-based alloy, is mixed with a binder such as wax or thermoplastics, in a volume ratio of 40% to 80% metal powder and 20% to 60% binder.
- a binder such as wax or thermoplastics
- the material or the mass is brought into the desired shape of the component in an injection molding machine or in a dry press.
- the components are then sintered without pressure.
- This sintering process is multi-stage, in particular two-stage, it can be followed by subsequent compression of the molded body. Hot isostatic pressing is preferred for post-compaction.
- the components are manufactured in such a way that following the known steps: shaping * and burnout, in a first sintering step to approx.
- the components 1 are attached to a furnace frame 2 or other container made of metal or ceramic, e.g., on rods (3).
- the attachment is best applied to the sprue, since this area of the molded part is no longer required later.
- the second sintering that is to say the component is heated in a vacuum or in a protective gas to the necessary temperature, which, depending on the metal alloy used, is in the range between approximately 1150 ° C. and 1300 ° C.
- the heating rate must be selected so that any cracks in the surface that are still present close during the second heat treatment, e.g. For example, in the case of nickel-based alloys, heating between 20 and 100 K / min for up to about 2 hours and a maximum temperature of 60% to 98% of the solidus temperature of the alloy is selected.
- the components produced in this way have no contour errors, have shrunk linearly and are therefore hardly smaller, ie practically true to size.
- the parts can have almost any shape and have a smooth, dense and crack-free surface.
- the density of the component was 95% to 98% of the theoretical density without post-compression and about 100% by post-compression using hot isostatic pressing.
- the parts to be sintered can also float (e.g. on a gas cushion made up of a large number of nozzles (6) or in the magnetic field of the coil (5) or with a suction cup (7) in their position in the container ( 2)
- the container consists of a material which does not react with these parts, such as Al_0- or ZrO «.
- the geometric shape of the precision parts to be manufactured is practically arbitrary.
- the injection or pressing process and the necessary injection molding or pressing mold are selected in at least near-net shape.
- An example of a suitable device is described in DE-OS 30 42 052.
- the invention is mainly used for ** blades or wheels in turbo mechanical engineering.
- FIG. 3 A shows a sample with sintering according to the prior art (in powder filling).
- 3B (right) shows a sample treated according to the invention.
- FIGS. 3A and 3B show that, according to the prior art, the surface of the sample is contaminated and the sample has deformed.
- DA * against the sample surface and of sound Geo ⁇ geometry (dimensions and shape retention) is.
- the invention thus achieves a result with simple means that is impressive.
- the success of the combination of agents according to the invention was by no means foreseeable and it creates the possibility of further applications of objects which are produced from powdered starting material.
- Fig. ⁇ o shows the sintering in powder filling according to the prior art, using a temperature-time program.
- 2o shows the sintering according to the invention with objects freely suspended or floating in the treatment chamber, likewise on the basis of a temperature-time program with the same units as in FIG. 1.
- the temperature treatment is carried out continuously in such a way that after a ⁇ ° (2nd) increase phase with a new holding phase, at least one temperature decrease with a holding phase follows.
- the manipulation of the preforms or green compacts is controlled from outside the container 2.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853527367 DE3527367A1 (de) | 1985-07-31 | 1985-07-31 | Auf pulvermetallurgischem wege hergestellte bauteile |
DE3527367 | 1985-07-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0232336A1 true EP0232336A1 (de) | 1987-08-19 |
Family
ID=6277232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86904764A Withdrawn EP0232336A1 (de) | 1985-07-31 | 1986-07-29 | Auf pulvermetallurgischem wege hergestellte bauteile |
Country Status (4)
Country | Link |
---|---|
US (1) | US4886639A (de) |
EP (1) | EP0232336A1 (de) |
DE (1) | DE3527367A1 (de) |
WO (1) | WO1987000781A1 (de) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4964907A (en) * | 1988-08-20 | 1990-10-23 | Kawasaki Steel Corp. | Sintered bodies and production process thereof |
CH681516A5 (de) * | 1989-09-13 | 1993-04-15 | Asea Brown Boveri | |
US5451244A (en) * | 1994-04-06 | 1995-09-19 | Special Metals Corporation | High strain rate deformation of nickel-base superalloy compact |
DE4412131A1 (de) * | 1994-04-08 | 1995-10-12 | Schaeffler Waelzlager Kg | Wälzlager |
US5977230A (en) * | 1998-01-13 | 1999-11-02 | Planet Polymer Technologies, Inc. | Powder and binder systems for use in metal and ceramic powder injection molding |
JP3052240B2 (ja) * | 1998-02-27 | 2000-06-12 | 東京タングステン株式会社 | X線管用回転陽極及びその製造方法 |
WO2003011500A2 (en) * | 2001-05-14 | 2003-02-13 | Honeywell International Inc. | Sintering process and tools for use in metal injection molding of large parts |
US6838046B2 (en) * | 2001-05-14 | 2005-01-04 | Honeywell International Inc. | Sintering process and tools for use in metal injection molding of large parts |
DE10331599A1 (de) * | 2003-07-11 | 2005-02-03 | Mtu Aero Engines Gmbh | Bauteil für eine Gasturbine sowie Verfahren zur Herstellung desselben |
DE10332882A1 (de) * | 2003-07-19 | 2005-02-03 | Mtu Aero Engines Gmbh | Verfahren zur Herstellung von Bauteilen einer Gasturbine |
DE10343781B4 (de) * | 2003-09-22 | 2009-02-12 | Mtu Aero Engines Gmbh | Verfahren zur Herstellung von Bauteilen |
DE10343780A1 (de) * | 2003-09-22 | 2005-04-14 | Mtu Aero Engines Gmbh | Verfahren zur Herstellung von Bauteilen und Halteeinrichtung |
US20060251536A1 (en) * | 2005-05-05 | 2006-11-09 | General Electric Company | Microwave processing of mim preforms |
US20070107216A1 (en) * | 2005-10-31 | 2007-05-17 | General Electric Company | Mim method for coating turbine shroud |
DE102006057912A1 (de) * | 2006-12-08 | 2008-06-12 | Mtu Aero Engines Gmbh | Leitschaufelkranz sowie Verfahren zum Herstellen desselben |
US20080237403A1 (en) * | 2007-03-26 | 2008-10-02 | General Electric Company | Metal injection molding process for bimetallic applications and airfoil |
US20090311124A1 (en) * | 2008-06-13 | 2009-12-17 | Baker Hughes Incorporated | Methods for sintering bodies of earth-boring tools and structures formed during the same |
US20100178194A1 (en) * | 2009-01-12 | 2010-07-15 | Accellent, Inc. | Powder extrusion of shaped sections |
US9903275B2 (en) | 2014-02-27 | 2018-02-27 | Pratt & Whitney Canada Corp. | Aircraft components with porous portion and methods of making |
US9517507B2 (en) | 2014-07-17 | 2016-12-13 | Pratt & Whitney Canada Corp. | Method of shaping green part and manufacturing method using same |
US20160263656A1 (en) | 2015-03-12 | 2016-09-15 | Pratt & Whitney Canada Corp. | Method of forming a component from a green part |
DE102015210770A1 (de) * | 2015-06-12 | 2016-12-15 | Rolls-Royce Deutschland Ltd & Co Kg | Bauteilkonstruktion, Bauteil für eine Gasturbine und Verfahren zur Herstellung eines Bauteils einer Gasturbine durch Metallpulverspritzgießen |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU432371B2 (en) * | 1967-07-13 | 1973-02-06 | Commonwealth Scientific And Industrial Research Organization | Plasma sintering |
ZA70736B (en) * | 1969-03-14 | 1971-09-29 | Nat Standard Co | Apparatus for and method of handling shrinkable extruded material |
US4002473A (en) * | 1971-11-08 | 1977-01-11 | P. R. Mallory & Co., Inc. | Method of making an anode |
US4063940A (en) * | 1975-05-19 | 1977-12-20 | Richard James Dain | Making of articles from metallic powder |
GB1562788A (en) * | 1976-10-21 | 1980-03-19 | Powdrex Ltd | Production of metal articles from tool steel or alloy steel powder |
GB2007719B (en) * | 1977-11-15 | 1982-03-31 | British Steel Corp | Production of metal compacts |
FR2464929A1 (fr) * | 1979-09-11 | 1981-03-20 | Comp Generale Electricite | Procede de frittage de pieces tubulaires en ceramique |
DE3042052C2 (de) * | 1980-11-07 | 1984-08-09 | MTU Motoren- und Turbinen-Union München GmbH, 8000 München | Vorrichtung zum Spritzgießen von Präzisionsteilen |
DE3120501C2 (de) * | 1981-05-22 | 1983-02-10 | MTU Motoren- und Turbinen-Union München GmbH, 8000 München | "Verfahren und Vorrichtung zur Herstellung von Formteilen" |
-
1985
- 1985-07-31 DE DE19853527367 patent/DE3527367A1/de active Granted
-
1986
- 1986-07-29 US US07/044,030 patent/US4886639A/en not_active Expired - Fee Related
- 1986-07-29 WO PCT/DE1986/000306 patent/WO1987000781A1/de not_active Application Discontinuation
- 1986-07-29 EP EP86904764A patent/EP0232336A1/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO8700781A1 * |
Also Published As
Publication number | Publication date |
---|---|
US4886639A (en) | 1989-12-12 |
DE3527367A1 (de) | 1987-02-12 |
DE3527367C2 (de) | 1991-03-14 |
WO1987000781A1 (en) | 1987-02-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0232336A1 (de) | Auf pulvermetallurgischem wege hergestellte bauteile | |
EP1119429B1 (de) | Verfahren zur herstellung von bauteilen durch metallpulverspritzguss | |
DE2628582C3 (de) | Zusammengesetztes Turbinenrad und Verfahren zu dessen Herstellung | |
DE4338457C2 (de) | Bauteil aus Metall oder Keramik mit dichter Außenschale und porösem Kern und Herstellungsverfahren | |
EP1764062B1 (de) | Formkörper aus einer Dentallegierung zur Herstellung von dentalen Teilen | |
WO2003101647A2 (de) | Verfahren zur endkonturnahen herstellung von hochporösen metallischen formkörpern | |
EP2123377A1 (de) | Verfahren zur Herstellung eines Werkstücks, insbesondere eines Formgebungswerkzeugs oder eines Formgebungswerkzeugteils. | |
EP0633440A1 (de) | Verfahren zur Herstellung eines Setters | |
EP0421084B1 (de) | Verfahren zur pulvermetallurgischen Herstellung eines Werkstücks | |
DE2258485A1 (de) | Verfahren und vorrichtung zur herstellung von guss- und pressformen | |
EP0525325A1 (de) | Verfahren zur Herstellung dichter Sinterwerkstücke | |
DE19612143B4 (de) | Verfahren zur Herstellung eines Spiralkontaktstückes für eine Vakuumkammer und Vorrichtung zur Durchführung des Verfahrens | |
DE4322085A1 (de) | Verfahren zur Herstellung eines Formteils aus einem pulverförmigen Material | |
DE102014209085B4 (de) | Herstellung eines Formkörpers aus einer Dentallegierung | |
DE2258305A1 (de) | Verfahren und einrichtung zum herstellen von formkoerpern aus hartstoffpulvern | |
DE19921934B4 (de) | Verfahren zur Herstellung eines pulvermetallurgischen Sinterformteils mit hoher Grunddichte und hoher Oberflächendichte | |
DE3517494C2 (de) | ||
DE1801280A1 (de) | Verfahren zum Herstellen eines Werkstuecks aus teilchenfoermigem Stoff | |
DE69303313T2 (de) | Herstellungsverfahren für einen anisotropen Seltenerd-Magneten | |
DE4322083A1 (de) | Verfahren zur Herstellung eines Formteils aus einem pulverförmigen Material | |
DE2436927C2 (de) | Verfahren und Vorrichtung zum pulvermetallurgischen Herstellen von Formteilen für elektrische Kontaktstücke | |
EP0446673A1 (de) | Verfahren zur Herstellung eines Sinterkörpers mit einer dichten Randzone und einer glatten Oberfläche | |
DE10336701B4 (de) | Verfahren zur Herstellung von Bauteilen | |
DE19703175A1 (de) | Verfahren zur Herstellung von keramischen oder pulvermetallurgischen Bauteilen mit einer schraubenförmigen Außenkontur | |
DE19703176C2 (de) | Verfahren zur Herstellung von keramischen oder pulvermetallurgischen Bauteilen |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19870219 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT CH DE FR GB IT LI SE |
|
17Q | First examination report despatched |
Effective date: 19890421 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 19891123 |
|
R18W | Application withdrawn (corrected) |
Effective date: 19891123 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: VOGEL, WILHELM Inventor name: ANDREES, GERHARD Inventor name: KRANZEDER, JOSEF |