WO2009018902A1 - Procédé et dispositif de fabrication d'un corps solide de forme tubulaire à partir d'un alliage de tungstène et de métaux lourds à haut point de fusion, en particulier comme ébauche pour la fabrication d'un pénétrateur pour munitions à haute pénétration et effet de fra - Google Patents

Procédé et dispositif de fabrication d'un corps solide de forme tubulaire à partir d'un alliage de tungstène et de métaux lourds à haut point de fusion, en particulier comme ébauche pour la fabrication d'un pénétrateur pour munitions à haute pénétration et effet de fra Download PDF

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Publication number
WO2009018902A1
WO2009018902A1 PCT/EP2008/005800 EP2008005800W WO2009018902A1 WO 2009018902 A1 WO2009018902 A1 WO 2009018902A1 EP 2008005800 W EP2008005800 W EP 2008005800W WO 2009018902 A1 WO2009018902 A1 WO 2009018902A1
Authority
WO
WIPO (PCT)
Prior art keywords
filling
filler
metal powder
producing
solid
Prior art date
Application number
PCT/EP2008/005800
Other languages
German (de)
English (en)
Inventor
Klaus-Dieter Beister
René OUDELHOVEN
Michael Vagedes
Original Assignee
Rheinmetall Waffe Munition Gmbh
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 Rheinmetall Waffe Munition Gmbh filed Critical Rheinmetall Waffe Munition Gmbh
Priority to US12/673,424 priority Critical patent/US20110176951A1/en
Priority to EP08784808.1A priority patent/EP2173507B1/fr
Publication of WO2009018902A1 publication Critical patent/WO2009018902A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
    • F42B33/02—Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges
    • F42B33/0214—Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges by casting
    • F42B33/0242—Filling cartridges, missiles, or fuzes; Inserting propellant or explosive charges by casting by pressure casting
    • 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
    • B22F3/1035—Liquid phase sintering
    • 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
    • B22F3/24—After-treatment of 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
    • 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
    • B22F5/106—Tube or ring forms
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/045—Alloys based on refractory metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/20—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
    • F42B12/22—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • Method and device for producing a tubular solid body from a high-melting tungsten heavy metal alloy in particular as a semi-finished product for the manufacture of a penetrator for a balancing projectile with splinter effect
  • the invention relates to a method and an apparatus for producing a tubular solid from a high-melting tungsten heavy metal alloy, in particular as a semi-finished product for the manufacture of a penetrator for a balancing projectile with splinter effect.
  • KE penetrators Balancing bullets with a massive penetrator made of WSM (tungsten heavy metal) are known. These so-called KE penetrators are optimized for a maximum penetration depth on tank targets and serve to combat enemy battle tanks.
  • WSM tungsten heavy metal
  • tubular penetrators are used for special ammunition, such as PELE, ALP or WSM explosive projectile. These are to avoid possible collateral damage of a penetrator, for example, when penetrating a wall or the like.
  • penetrators are previously made of solid rods, which are subsequently processed by deep hole drilling, so as to be hollowed out or pierced. This process is technically very complicated and not economical.
  • a method for producing such a full penetrator is known, for example, from DE 10 2005 049 748 A1.
  • For low-cost production of such a penetrator is introduced into a, adapted to the outer dimensions of the penetrator concentric with the dimension of the Penetratorkems Doppeltrichterein colllvorraum, creating a gap is created.
  • a first tungsten-like powder mixture is filled with high tungsten content for producing the Penetratorkems
  • a second tungsten-containing powder mixture is introduced into the annular space, which has a lower tungsten content compared to the other powder mixture.
  • the invention has the object to show a cost-effective method and apparatus for performing this method for the production of WSM tubes, as a semi-finished product for the production of, for example, penetrators for balancing projectiles with fragmentation.
  • the invention is based on the idea to produce such pipes or tubular penetrators, in which both ends can be open or closed, in the sintering process without reworking the inner contour.
  • Sintering is done with an internal medium in the blank, which can be easily removed after sintering.
  • a uniform shrinkage as known in solid bars, achieved by appropriate pressing process and temperature characteristics during sintering.
  • the material properties are set by the alloy composition and characterized by heat treatment and, if necessary, mechanical forming.
  • the method can be used for small rods for medium caliber ammunition (eg outside 0 22mm, inside 0 15mm), as large bore caliber carbide ammunition and for large rods for full caliber ammunition 120mm (e.g., outside 0120mm, inside 110mm).
  • the material is a tungsten heavy metal alloy.
  • Length and diameter are variable and are currently not limited by the process itself, but rather by conventional manufacturing equipment. But this has the advantage that existing manufacturing equipment can be used.
  • a filling device consisting of an outer tube with a concentrically arranged pressing die and a filling piece with attached filling tube and centering part, is filled with a metal powder mixture.
  • Length and diameter of the outer tube and press die determine the outer contour and the geometry of the filler determines the inner contour of the tubular solid.
  • a plastic centering is attached to one end and at the other end, the centering takes place via a plugged centering with fixedly connected thereto filling tube.
  • a filling of the cavity between see pressing die and filler with a metal powder mixture is made possible through the filling tube.
  • the centering part together with the filling tube is removed from the filling piece.
  • the metal powder mixture is refilled by hand to the desired height above the filler after removing centering and filling tube.
  • the press die is closed with a stopper.
  • the filling device For compacting the metal powder, the filling device is placed in a press plant and pressed into a green compact. This has, depending on the structure of the filling device, after removal from this, the shape of a unilaterally fugitive or open on both sides of the tube.
  • the green compact After pressing, the green compact is sintered in one or more passes, whereby known dimensions from the pressing workpieces with solid properties are produced.
  • tubes are produced for producing penetrators with very good fragmentation, which can be adjusted by the ratio of inner to outer diameter and the corresponding material or material composition.
  • Fig. 2 is a tubular solid body produced by the method with one end closed at one end.
  • FIG. 1a, b show a filling device or mold 1 for producing a tubular solid body 10 which is closed on one side (see FIG. 2).
  • the filling device Fig. 1a consists of an outer tube 2 (preferably made of steel), in which there are holes on the shell and bottom surface at regular intervals.
  • a pressing die 3 preferably made of PU
  • a filler 4 preferably made of metal
  • a filling tube 5 attached to the outer tube 2 .
  • the concentricity of the filler 4 is ensured by a centering disc 6 (preferably made of PU) at the lower end and plugged on the filler centering part 7 of the filling tube 5 at the upper end. Centering 7 and filling tube 5 are firmly connected.
  • the filling device Fig. 1 b For compacting the metal powder, the filling device Fig. 1 b in a hydrostatic pressing system (not shown in detail, as known) placed and at a pressure of about 1500 bar, the metal powder mixture is pressed into a green compact. This has after removal from the filling Fig. 1 b the shape of a tube closed on one side and can be traded without breaking.
  • the pressed tubes are then sintered in one or more passes in an oven (presintering at a temperature between 1400 ° C and 1490 0 C, resintering at a temperature between 1495 ° C and 1570 0 C), so that from the pressing workpieces with solid properties getting produced.
  • the pressed tubes during pre- and post-sintering are subjected to a preselected time-temperature curve, which ensures that forms in a stable tungsten skeleton, a melt of tungsten and the remaining binder elements and evenly shrink in all directions, so that after resuming a geometric desired solid arises, as shown for example in Fig. 2.
  • the solid is subjected to a heat treatment after resintering.
  • a heat treatment after resintering.
  • eg tensile strength, elongation at break and constriction can be adjusted.
  • This is preferably carried out in an annealing process, in which the annealing in a high vacuum below the melting temperature of the binder leads to a phase transformation, which leads to the subsequent quenching, for example in N 2 for fixing the material state and thus the material properties.
  • FIG. 2 shows a tubular solid body for producing an ammunition not shown in detail (for example, a balancing projectile with splinter formation), which has been produced by the method described above and the solid state properties set. has shadow.
  • This has L 9 a predetermined total length and l_ v a length of the solid body and has an inner diameter dj and an outer diameter d a .

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

L'invention propose un dispositif de remplissage (1) constitué d'un tube extérieur (2) dans lequel est située une matrice de presse (3) ainsi qu'une pièce de charge (4) qui remplit d'un mélange de poudres métalliques l'espace intermédiaire (8) formé entre la pièce de charge (4) et la matrice de presse (3), l'espace intermédiaire étant ensuite fermé. Pour comprimer la poudre métallique, le dispositif de remplissage (1) est placé dans une installation de presse hydrostatique et le mélange de poudres métalliques est comprimé pour former une ébauche crue. Les tubes comprimés sont ensuite frittés en une ou plusieurs passes dans un four, et dans ce but les tubes comprimés sont exposés à une évolution présélectionnée de la température en fonction du temps de manière à garantir qu'il se forme du tungstène fondu (W) qui se répand uniformément dans toutes les directions, de telle sorte qu'après le frittage on obtienne un corps solide qui présente la géométrie souhaitée.
PCT/EP2008/005800 2007-08-09 2008-07-16 Procédé et dispositif de fabrication d'un corps solide de forme tubulaire à partir d'un alliage de tungstène et de métaux lourds à haut point de fusion, en particulier comme ébauche pour la fabrication d'un pénétrateur pour munitions à haute pénétration et effet de fra WO2009018902A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/673,424 US20110176951A1 (en) 2007-08-09 2008-07-16 Method and device for producing a tubular solid body from a refractory tungsten heavy metal alloy, particularly as a semi-finished product for the production of a penetrator for a kinetic energy projectile with fragmentation effect
EP08784808.1A EP2173507B1 (fr) 2007-08-09 2008-07-16 Procédé et dispositif de fabrication d'un corps solide de forme tubulaire à partir d'un alliage de tungstène et de métaux lourds à haut point de fusion, en particulier comme ébauche pour la fabrication d'un pénétrateur pour munitions à haute pénétration et effet de fragmentation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007037702A DE102007037702A1 (de) 2007-08-09 2007-08-09 Verfahren und Vorrichtung zur Herstellung eines rohrförmigen Festkörpers aus einer hochschmelzenden Wolfram-Schwermetalllegierung, insbesondere als Halbzeug für die Fertigung eines Penetrators für ein Wuchtgeschoss mit Splitterwirkung
DE102007037702.0 2007-08-09

Publications (1)

Publication Number Publication Date
WO2009018902A1 true WO2009018902A1 (fr) 2009-02-12

Family

ID=39800561

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/005800 WO2009018902A1 (fr) 2007-08-09 2008-07-16 Procédé et dispositif de fabrication d'un corps solide de forme tubulaire à partir d'un alliage de tungstène et de métaux lourds à haut point de fusion, en particulier comme ébauche pour la fabrication d'un pénétrateur pour munitions à haute pénétration et effet de fra

Country Status (4)

Country Link
US (1) US20110176951A1 (fr)
EP (1) EP2173507B1 (fr)
DE (1) DE102007037702A1 (fr)
WO (1) WO2009018902A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11149343B2 (en) * 2015-05-28 2021-10-19 Materion Corporation Processes for refurbishing a spent sputtering target
DE102015117018A1 (de) 2015-10-06 2017-04-06 Rheinmetall Waffe Munition Gmbh Penetrator sowie unterkalibriges Geschoss
US20190017791A1 (en) * 2017-03-07 2019-01-17 U.S. Army Research Laboratory Attn: Rdrl-Loc-I Reduced Jacketed Bullet Bore Resistance
CN115109977A (zh) * 2021-03-23 2022-09-27 安泰科技股份有限公司 一种超大规格高性能钨合金管及其制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124198A1 (de) 1991-07-20 1993-01-21 Sinterstahl Gmbh Verfahren zur herstellung von sinterformteilen mittels kaltisostatischen pulverpressens in einmal verwendbaren pressformen
DE3821474C1 (de) 1988-06-25 1998-08-27 Nwm De Kruithoorn Bv Unterkalibriges, drallstabilisiertes Mehrzweckgeschoß
JP2004114139A (ja) 2002-09-30 2004-04-15 Kyocera Corp 冷間静水圧成形用治具及びそれを用いた成形体の製造方法
US20050006825A1 (en) 2003-07-09 2005-01-13 Kabushiki Kaisha Meidensha Method of producing molded green body and producing insert by baking the green body
EP1722187A1 (fr) * 2005-05-12 2006-11-15 Rheinmetall Waffe Munition GmbH Procédé de la fabrication d'un projectile
DE102005049748A1 (de) 2005-10-18 2007-04-19 Rheinmetall Waffe Munition Gmbh Verfahren zur Herstellung eines Penetrators

Family Cites Families (3)

* 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
US4655984A (en) * 1984-10-15 1987-04-07 Champion Spark Plug Company Method of and apparatus for isostatically pressing a body from particulate material
DE4318827C2 (de) * 1993-06-07 1996-08-08 Nwm De Kruithoorn Bv Schwermetallegierung und Verfahren zu ihrer Herstellung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3821474C1 (de) 1988-06-25 1998-08-27 Nwm De Kruithoorn Bv Unterkalibriges, drallstabilisiertes Mehrzweckgeschoß
DE4124198A1 (de) 1991-07-20 1993-01-21 Sinterstahl Gmbh Verfahren zur herstellung von sinterformteilen mittels kaltisostatischen pulverpressens in einmal verwendbaren pressformen
JP2004114139A (ja) 2002-09-30 2004-04-15 Kyocera Corp 冷間静水圧成形用治具及びそれを用いた成形体の製造方法
US20050006825A1 (en) 2003-07-09 2005-01-13 Kabushiki Kaisha Meidensha Method of producing molded green body and producing insert by baking the green body
EP1722187A1 (fr) * 2005-05-12 2006-11-15 Rheinmetall Waffe Munition GmbH Procédé de la fabrication d'un projectile
DE102005049748A1 (de) 2005-10-18 2007-04-19 Rheinmetall Waffe Munition Gmbh Verfahren zur Herstellung eines Penetrators

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MINDRUP W ET AL: "Isostatisches Pressen nach dem QUINTUS-Verfahren", KERAMISCHE ZEITSCHRIFT, DVS VERLAG, DUESSELDORF, DE, vol. 23, no. 9, 1 January 1971 (1971-01-01), pages 510 - 514, XP009107115, ISSN: 0023-0561 *

Also Published As

Publication number Publication date
US20110176951A1 (en) 2011-07-21
EP2173507A1 (fr) 2010-04-14
EP2173507B1 (fr) 2014-02-26
DE102007037702A1 (de) 2009-02-12

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