EP0114593A1 - Verfahren zur Herstellung eines Maschinenhohlzylinders für Kunststoffverarbeitungsmaschinen - Google Patents

Verfahren zur Herstellung eines Maschinenhohlzylinders für Kunststoffverarbeitungsmaschinen Download PDF

Info

Publication number
EP0114593A1
EP0114593A1 EP83890234A EP83890234A EP0114593A1 EP 0114593 A1 EP0114593 A1 EP 0114593A1 EP 83890234 A EP83890234 A EP 83890234A EP 83890234 A EP83890234 A EP 83890234A EP 0114593 A1 EP0114593 A1 EP 0114593A1
Authority
EP
European Patent Office
Prior art keywords
tube
jacket tube
resistant
hollow cylinder
alloy
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Withdrawn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
EP83890234A
Other languages
German (de)
English (en)
French (fr)
Inventor
Manfred Gstettner
Bruno Dipl.-Ing. Hribernik
Alexander Kohnhauser
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.)
Vereinigte Edelstahlwerke AG
Original Assignee
Vereinigte Edelstahlwerke AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3567024&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0114593(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Vereinigte Edelstahlwerke AG filed Critical Vereinigte Edelstahlwerke AG
Publication of EP0114593A1 publication Critical patent/EP0114593A1/de
Withdrawn legal-status Critical Current

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
    • B22F3/12—Both compacting and sintering
    • B22F3/1208—Containers or coating used therefor
    • 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
    • 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
    • B22F7/08—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 with one or more parts not made from powder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/02—Composite barrels, i.e. barrels having multiple layers, e.g. of different materials
    • 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
    • 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
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12063—Nonparticulate metal component
    • Y10T428/12097—Nonparticulate component encloses particles

Definitions

  • a composite material has proven itself, which is formed as a hollow cylinder from a forged or hot-rolled blank from a highly wear-resistant, hardenable and corrosion-resistant steel core and a shell made of structural steel.
  • the object of the present invention is now to provide a method which allows a machine hollow cylinder for plastic processing machines to be produced in a particularly simple manner, with a high possibility of combination for the different materials, depending on the application, being given.
  • the inventive method for producing a Ma . schin hollow cylinder for plastics processing machines with an outer tube and an inner tube of a different material essentially consists in that in a H lenrohr ül- which is optionally disposed in a capsule tube, of a tenacious alloy such as steel, a filling of a bulk density of at least 60 % of the density of the compact, powdery, highly wear-resistant, in particular highly heat-wear-resistant and / or corrosion-resistant material, optionally in the pre-pressed and / or pre-sintered state and preferably with the exception of one, in particular central, hollow area of the jacket tube, is introduced, optionally compressed, and on the jacket tube ends respectively.
  • the central hollow area is filled with a filler, preferably made of an easily machinable material, e.g. Free cutting steel, so on the one hand elaborate powder is saved, and at the same time a particularly simple manufacture of an inner hollow can be carried out.
  • a filler preferably made of an easily machinable material, e.g. Free cutting steel
  • a tube can also be used as a filler body, where it is then forged using a mandrel, for example, and additional labor savings can occur.
  • the composite body is subjected to a hot deformation, in particular forging, with a deformation of at least 1.3, in particular 2 times, before it is mechanically processed into a hollow machine cylinder, in addition to the particularly high metallurgical bond between the powder-metallurgically solidified material and the melt-metallurgically obtained tube, there is an additional increase the mechanical properties of the powder metallurgical material is achieved, so that there is another field of application.
  • a difficult-to-deform iron-based alloy in particular a ledeburitic chromium steel, can be used as the material for filling the casing tube, in which case the advantages of the method according to the invention become particularly clear.
  • a cobalt-based alloy is also particularly suitable as a highly wear-resistant alloy.
  • the cladding tube can have an inner coating made of an adhesion promoter in order to achieve better anchoring of the powder metallurgical material in the tube obtained by melting metallurgy.
  • a sleeve tube made of an alloy of the following composition in wt .-% C 0.26, Si 0.30, Mn 0.70, Cr 1.1, Mo 0.25 and remainder iron with an outer diameter of 210 mm and an inner diameter of 85 mm and a length of 900 mm.
  • a powder of a ledeburitic chromium steel alloy with the following composition in% by weight of C 2.3, Si 0.28, Mn 0.37, Cr 12.6, Mo 0.98, V 4.1 and the rest iron was filled into this tube , wherein a density of 5.2 g / cm 3 was achieved by shaking.
  • Degassing was carried out at 360 ° C., whereupon an upper cover with a suction opening was welded onto the capsule tube. Then it was evacuated and the suction opening was closed.
  • the encapsulated body was hot-isostatically pressed for 3 hours in an argon atmosphere at 1050 ° C. and at a pressure of 1000 bar.
  • This composite body was then forged on a long forging machine to an outside diameter of approx. 85 mm, which corresponds to an approx. 6, lfold deformation. After forging was annealed, followed by an extruder cylinder was manufactured by mechanical processing, cutting to length, turning and heat treatment.
  • a machine hollow cylinder for plastic processing machines was produced in such a way that a cylindrical sleeve tube made of 16MnCr5 with an outer diameter of 85 mm, an inner diameter of 45 mm and a length of 650 mm with a spherical powder formed from the melt and having a bulk density of about 66% from a ledeburitic chromium steel alloy of the composition in% by weight C 2.2, Si 0.28, Mn 0.37, Cr 12.6, Mo 0.98, V 4.1, the rest essentially filled with iron Evacuation was compressed and sealed gas-tight at the pipe ends by means of welded-on round cover plates.
  • the blank was then placed in a hot isostatic pressing device and subjected to a temperature of 1060 ° C and an argon gas pressure of 1000 bar for three hours, and then cooled to room temperature in still air. After the plates had been cut off by sawing off the two outermost pipe ends, the hollow of 24 mm in diameter was formed using a hole boring machine and heat-treated.
  • a cylinder for plastic processing machines was produced analogously to Example 1, a centrally arranged inner rod made of free-cutting steel with an outer diameter of 50 mm being provided in a casing tube according to Example 1 with an outer diameter of 210 mm and an inner diameter of 85 mm.
  • the space was filled with a powder made of ledeburitic chrome steel.
  • the casing tube was closed at its ends with sheet steel disks. Otherwise, the procedure was analogous to Example 1.
  • an inner diameter of 212 mm and a length of 900 mm was a sleeve tube made of an alloy of the following composition in wt .-% C 0.45, Si 0.3 , Mn 0.7 and rest of iron with an outer diameter of 210 mm and an inner diameter of 85 mm and a length of 900 mm.
  • a powder of the following composition in% by weight C 3.3, Cr 12.8, V 4, -5, Mo 1.1, W 1.0 and the rest iron was filled into this tube, a density of approx 65% was reached.
  • Degassing was carried out at 370 ° C., whereupon an upper cover with a suction opening was welded onto the capsule tube. Then it was evacuated and the suction opening was closed.
  • the encapsulated body was hot-isostatically pressed for 3 hours in an argon atmosphere at 1080 ° C. and a pressure of 1050 bar. This composite body was then forged on a long forging machine to an outer diameter of approximately 90 mm, which corresponds to a 5.4-fold deformation. After forging, heat treatment was carried out, after which an extruder cylinder was manufactured by mechanical processing and further heat treatment.
  • Example 4 The procedure was analogous to Example 4, a powder of a cobalt-based alloy having the following composition in% by weight of C 0.25, Cr 8.25, Mo 5.5 and the rest of cobalt being used.
  • an inner coating for example of Nik -. Kel or the like, which may occur as an adhesion promoter between the material of the sheath tube and the powder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Forging (AREA)
  • Powder Metallurgy (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Glass Compositions (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Semiconductor Lasers (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Coating With Molten Metal (AREA)
EP83890234A 1982-12-23 1983-12-22 Verfahren zur Herstellung eines Maschinenhohlzylinders für Kunststoffverarbeitungsmaschinen Withdrawn EP0114593A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT467982 1982-12-23
AT4679/82 1982-12-23

Publications (1)

Publication Number Publication Date
EP0114593A1 true EP0114593A1 (de) 1984-08-01

Family

ID=3567024

Family Applications (3)

Application Number Title Priority Date Filing Date
EP83890234A Withdrawn EP0114593A1 (de) 1982-12-23 1983-12-22 Verfahren zur Herstellung eines Maschinenhohlzylinders für Kunststoffverarbeitungsmaschinen
EP83890232A Expired EP0114591B1 (de) 1982-12-23 1983-12-22 Verfahren zur Herstellung von Waffenrohren
EP83890233A Expired EP0114592B1 (de) 1982-12-23 1983-12-22 Verfahren zur Metallverarbeitung unter Verwendung von Matrizen

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP83890232A Expired EP0114591B1 (de) 1982-12-23 1983-12-22 Verfahren zur Herstellung von Waffenrohren
EP83890233A Expired EP0114592B1 (de) 1982-12-23 1983-12-22 Verfahren zur Metallverarbeitung unter Verwendung von Matrizen

Country Status (6)

Country Link
US (1) US4747225A (enrdf_load_stackoverflow)
EP (3) EP0114593A1 (enrdf_load_stackoverflow)
AT (2) ATE33218T1 (enrdf_load_stackoverflow)
DE (2) DE3376100D1 (enrdf_load_stackoverflow)
ES (2) ES528317A0 (enrdf_load_stackoverflow)
GR (2) GR79748B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0151103A3 (en) * 1984-01-24 1988-01-20 Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) Manufacturing method for elements of force, especially torque transmission
AT391105B (de) * 1988-10-07 1990-08-27 Boehler Gmbh Vormaterial fuer die erzeugung von verbundwerkstoffen

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640814A (en) * 1985-10-17 1987-02-03 Crucible Materials Corporation Method for producing clad tubular product
DE3881923T2 (de) * 1987-03-25 1994-01-27 Nippon Steel Corp Verfahren zur Herstellung von beschichteten Metallrohre.
DE4136038C2 (de) * 1990-11-02 1994-06-16 Usui Kokusai Sangyo Kk Geschweißtes Stahlrohr mit hoher Korrosionsbeständigkeit der Innenoberfläche sowie Verfahren zu seiner Herstellung
US5290507A (en) * 1991-02-19 1994-03-01 Runkle Joseph C Method for making tool steel with high thermal fatigue resistance
US5341719A (en) * 1992-12-14 1994-08-30 General Electric Company Multi-layer composite gun barrel
US5357842A (en) * 1993-07-09 1994-10-25 Reynolds Charles E Recoil reducing device
US6218026B1 (en) 1995-06-07 2001-04-17 Allison Engine Company Lightweight high stiffness member and manufacturing method thereof
US5724643A (en) * 1995-06-07 1998-03-03 Allison Engine Company, Inc. Lightweight high stiffness shaft and manufacturing method thereof
US5856631A (en) * 1995-11-20 1999-01-05 Nitinol Technologies, Inc. Gun barrel
DE19834394A1 (de) * 1998-07-30 2000-02-03 Rheinmetall W & M Gmbh Waffenrohr mit einer verschleißmindernden Hartchromschicht
SE516130C2 (sv) * 1999-03-15 2001-11-19 Damasteel Ab Ämne för metallprodukt, förfarande för framställning av metallprodukt samt metallprodukt
RU2167742C2 (ru) * 1999-03-31 2001-05-27 Курский государственный технический университет Способ армирования металлических изделий твердосплавным слоем
DE19926246A1 (de) * 1999-06-09 2000-12-14 Rheinmetall W & M Gmbh Verfahren zur Innenbeschichtung eines Waffenrohres
US6594936B1 (en) * 2002-10-03 2003-07-22 Gary Sniezak Method for lining a gun barrel
US20040226211A1 (en) * 2003-05-16 2004-11-18 Ra Brands. L.L.C. Composite receiver for firearms
US20040244254A1 (en) * 2003-06-09 2004-12-09 Barfield Christopher A.. Firearm safety device
US7922065B2 (en) 2004-08-02 2011-04-12 Ati Properties, Inc. Corrosion resistant fluid conducting parts, methods of making corrosion resistant fluid conducting parts and equipment and parts replacement methods utilizing corrosion resistant fluid conducting parts
US7963202B1 (en) * 2005-09-21 2011-06-21 The United States Of America As Represented By The Secretary Of The Army Superalloy mortar tube
US7921590B2 (en) 2006-02-23 2011-04-12 Strum, Ruger & Company, Inc. Composite firearm barrel reinforcement
US20100236122A1 (en) * 2006-07-26 2010-09-23 Fonte Matthew V Flowforming Gun Barrels and Similar Tubular Devices
WO2008016353A1 (en) * 2006-08-01 2008-02-07 Afl Telecommunications Llc Embedded metallic tubes with compression fit and method for manufacturing the same
US8910409B1 (en) 2010-02-09 2014-12-16 Ati Properties, Inc. System and method of producing autofrettage in tubular components using a flowforming process
US8869443B2 (en) 2011-03-02 2014-10-28 Ati Properties, Inc. Composite gun barrel with outer sleeve made from shape memory alloy to dampen firing vibrations
US10118259B1 (en) 2012-12-11 2018-11-06 Ati Properties Llc Corrosion resistant bimetallic tube manufactured by a two-step process
US9279633B2 (en) 2014-01-21 2016-03-08 Richard R. Hayes Multi-caliber weapon
US9796057B2 (en) * 2015-01-15 2017-10-24 Saeilo Enterprises, Inc. Gun barrel assembly
SE2300011A1 (sv) * 2023-02-09 2024-08-10 Bae Systems Bofors Ab Eldrör

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753704A (en) * 1967-04-14 1973-08-21 Int Nickel Co Production of clad metal articles
DE2504032A1 (de) * 1974-01-31 1975-08-07 Nippon Musical Instruments Mfg Verfahren zur herstellung von metallverbundstoffen
DE2514565A1 (de) * 1975-04-03 1976-10-14 Uralsky Nii Trubnoj Promy Verfahren zur herstellung von rohrerzeugnissen
DE2855155A1 (de) * 1977-12-22 1979-06-28 United Technologies Corp Verfahren zum herstellen eines fluidgekuehlten bedampfungstargets
DE3114659A1 (de) * 1980-04-10 1982-01-28 Cameron Iron Works, Inc., Houston, Tex. Verfahren zum auskleiden der hohlraeume in einem bauteil, beispielsweise einem ventil, sowie ausgekleidetes bauteil
US4327154A (en) * 1977-08-18 1982-04-27 Motoren- Und Turbinen-Union Muenchen Gmbh High-strength components of complex geometric shape and method for their manufacture

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US930927A (en) * 1906-03-19 1909-08-10 Robert H Berkstresser Gun-barrel and process of producing the same.
US2372202A (en) * 1940-05-08 1945-03-27 Mallory & Co Inc P R Bearing
US2636849A (en) * 1946-12-13 1953-04-28 Us Sec War Method of electroforming gun barrels and liners
US2977666A (en) * 1954-12-29 1961-04-04 Porter H Brace Method of making gun liner elements
US3112553A (en) * 1960-06-08 1963-12-03 William H Safranek Electroforming of gun liners
US3261121A (en) * 1961-10-13 1966-07-19 Joseph R Eves Gun barrel with explosively welded liner
US4016008A (en) * 1975-07-31 1977-04-05 The International Nickel Company, Inc. Clad metal tubes
US4426248A (en) * 1983-05-20 1984-01-17 The United States Of America As Represented By The Secretary Of The Army Process for coating rifle tubes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753704A (en) * 1967-04-14 1973-08-21 Int Nickel Co Production of clad metal articles
DE2504032A1 (de) * 1974-01-31 1975-08-07 Nippon Musical Instruments Mfg Verfahren zur herstellung von metallverbundstoffen
DE2514565A1 (de) * 1975-04-03 1976-10-14 Uralsky Nii Trubnoj Promy Verfahren zur herstellung von rohrerzeugnissen
US4327154A (en) * 1977-08-18 1982-04-27 Motoren- Und Turbinen-Union Muenchen Gmbh High-strength components of complex geometric shape and method for their manufacture
DE2855155A1 (de) * 1977-12-22 1979-06-28 United Technologies Corp Verfahren zum herstellen eines fluidgekuehlten bedampfungstargets
DE3114659A1 (de) * 1980-04-10 1982-01-28 Cameron Iron Works, Inc., Houston, Tex. Verfahren zum auskleiden der hohlraeume in einem bauteil, beispielsweise einem ventil, sowie ausgekleidetes bauteil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0151103A3 (en) * 1984-01-24 1988-01-20 Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) Manufacturing method for elements of force, especially torque transmission
AT391105B (de) * 1988-10-07 1990-08-27 Boehler Gmbh Vormaterial fuer die erzeugung von verbundwerkstoffen
US5004653A (en) * 1988-10-07 1991-04-02 Boehler Ges. M.B.H. Preliminary material for the production of composite material parts and method of making

Also Published As

Publication number Publication date
ES8501657A1 (es) 1984-12-01
DE3376101D1 (en) 1988-05-05
ES8501658A1 (es) 1984-12-01
GR79748B (enrdf_load_stackoverflow) 1984-10-31
ATE33218T1 (de) 1988-04-15
EP0114591A1 (de) 1984-08-01
ATE33219T1 (de) 1988-04-15
ES528317A0 (es) 1984-12-01
EP0114591B1 (de) 1988-03-30
EP0114592A1 (de) 1984-08-01
DE3376100D1 (en) 1988-05-05
US4747225A (en) 1988-05-31
EP0114592B1 (de) 1988-03-30
ES528315A0 (es) 1984-12-01
GR81355B (enrdf_load_stackoverflow) 1984-12-11

Similar Documents

Publication Publication Date Title
EP0114593A1 (de) Verfahren zur Herstellung eines Maschinenhohlzylinders für Kunststoffverarbeitungsmaschinen
DE68903894T2 (de) Verfahren zum direkten verformen und optimieren der mechanischen eigenschaften von panzergeschossen aus wolframlegierungen mit hohem spezifischem gewicht.
EP0638147B1 (de) Verfahren zum herstellen eines bauteils mit wenigstens einer geteilten lauffläche für wälzkörper
DE2419014C3 (de) Verfahren zum Herstellen von Rohren aus rostfreiem Stahl und Anwendung des Verfahrens auf das Herstellen von Verbundrohren
DE2460013C3 (de) Verfahren zum Herstellen metallischer Formkörper
DE2310536A1 (de) Verfahren zur herstellung von gegenstaenden aus verbundmetall
DE1298293B (de) Hochverschleissfeste, bearbeitbare und haertbare Sinterstahllegierung und Verfahren zu deren Herstellung
DE2208070C2 (de) Verbundkörper und Verfahren zu dessen Herstellung
EP0035601B1 (de) Verfahren zur Herstellung einer Gedächtnislegierung
DD202635A5 (de) Vorrichtung und verfahren zum kontinuierlichen, durch reibung ausgeloesten strangpressen
DE1962495C3 (de) Verfahren zur Herstellung von gesintertem Chromstahl hoher Dichte
EP3335820B1 (de) Verbundkörper und verfahren zu seiner herstellung
AT507836B1 (de) Verfahren zur herstellung eines stahlformteils
DE2415035B2 (de) Verfahren zum pulvermetallurgischen Herstellen eines Gleitstücks hoher Festigkeit, insbesondere einer Scheiteldichtung für Drehkolbenmaschinen
EP0045985B1 (de) Verfahren zur Herstellung einer Kupferbasis-Gedächtnislegierung
DE69107005T2 (de) Verfahren zur Herstellung von Formstoff und Formstoff.
DE69530129T2 (de) Hochfeste gesinterte legierung und verfahren zu deren herstellung
DE2539684C1 (de) Splitterhuelle fuer Geschosse,Gefechtskoepfe,Wurfmunition u.dgl.
DE2220673C3 (de) Metallische Sinterlegierung, insbesondere Sinterstahllegierung
EP0151103B1 (de) Verfahren zur Herstellung von kraftübertragenden, insbesondere drehmomentübertragenden Elementen
DE10346265B4 (de) Werkzeug und Verfahren zum Thixoschmieden von Schmiedeteilen aus Stahl
DE2438315C3 (de) Verfahren zum pulvermetallurgischen Herstellen von Genauteilen
EP0814172B1 (de) PM-Warmarbeitsstahl und Verfahren zu dessen Herstellung
DE1170149B (de) Verfahren zur pulvermetallurgischen Herstellung von Waelzlagerlaufringen aus Sinterstahl
DE3727360A1 (de) Verfahren zur herstellung eines werkstuecks aus einer korrosions- und oxydationsbestaendigen ni/al/si/b-legierung

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

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19850125

17Q First examination report despatched

Effective date: 19860404

R17C First examination report despatched (corrected)

Effective date: 19860821

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: 19870421

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GSTETTNER, MANFRED

Inventor name: KOHNHAUSER, ALEXANDER

Inventor name: HRIBERNIK, BRUNO, DIPL.-ING.