US20110176951A1 - 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 - Google Patents

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 Download PDF

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Publication number
US20110176951A1
US20110176951A1 US12/673,424 US67342408A US2011176951A1 US 20110176951 A1 US20110176951 A1 US 20110176951A1 US 67342408 A US67342408 A US 67342408A US 2011176951 A1 US2011176951 A1 US 2011176951A1
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US
United States
Prior art keywords
filler
tube
filling
extrusion die
metal powder
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.)
Abandoned
Application number
US12/673,424
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English (en)
Inventor
Klaus-Dieter Beister
René Oudelhoven
Michael Vagedes
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.)
Rheinmetall Waffe Munition GmbH
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
Assigned to RHEINMETALL WAFFE MUNITION GMBH reassignment RHEINMETALL WAFFE MUNITION GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BEISTER, KLAUS-DIETER, OUDELHOVEN, RENE, VAGEDES, MICHAEL
Publication of US20110176951A1 publication Critical patent/US20110176951A1/en
Abandoned legal-status Critical Current

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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

  • the invention relates to a method and a 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.
  • kinetic energy projectiles with a solid penetrator of WSM tungsten heavy metal
  • WSM tungsten heavy metal
  • tubular penetrators are used due to the new requirements for these munitions. These should avoid possible collateral damage of a penetrator, for example, when penetrating a wall, or the like.
  • penetrators have previously been produced from solid bars that are subsequently processed by deep-hole boring in order, thus, to be hollowed out or bored through. This method is technically very laborious and not economical.
  • a method for producing a full penetrator of this type is known, for example, from DE 10 2005 049 748 A1.
  • a double-funnel filler device matched to the dimension of the penetrator core is inserted concentrically at the outside dimensions of the penetrator, as a result of which an intermediate space is created.
  • a first tungsten-like powder mixture with a high proportion of tungsten is filled in the inner tube to produce the penetrator core
  • a second tungsten-containing powder mixture is inserted into the ring-shaped intermediate space, which second powder mixture has a smaller proportion of tungsten than the other powder mixture.
  • the object of the present invention is to show a more cost-effective method, and a device for carrying out this method, for the production of WSM tubes, as a semi-finished product for the production of, e.g., penetrators for kinetic energy projectiles with fragmentation effect.
  • a method for producing a tubular solid body is provided and characterized in that (a) a filler device, comprising an outer tube ( 2 ) with an extrusion die ( 3 ) situated therein as well as a filler piece ( 4 ), is filled with a metal powder mixture in the intermediate space ( 8 ) forming between the filler piece ( 4 ) and the extrusion die ( 3 ), and the extrusion die ( 3 ) is then closed, (b) in order to compact the metal powder, the filler device ( 1 ) is placed in a hydrostatic pressing system and the metal powder mixture is pressed to produce a green preform, and (c) the pressed tubes are subsequently sintered in one or more
  • the first embodiment is modified so that, after the sintering, the solid body is subjected to a heat treatment, through which tensile strength and elongation at break can be adjusted.
  • the second embodiment is further modified so that, after the heat treatment, the solid body is subjected to a forging process, through which the flow point and tensile strength increase.
  • the first embodiment, the second embodiment, and the third embodiment are further modified so that the filler device is filled with the metal powder via a filler tube ( 5 ) that is placed on the filler piece ( 4 ) and enables a filling between filler piece ( 4 ) and extrusion die ( 3 ).
  • the first embodiment, the second embodiment, the third embodiment and the fourth embodiment are further modified so that the filler tube ( 5 ) is removed after the filling of the filler device.
  • the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment are further modified so that the intermediate space ( 8 ) is closed by a plug ( 9 ).
  • the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment and the sixth embodiment are further modified so that the metal powder mixture comprises a tungsten heavy metal alloy with 80-98% by weight tungsten and at least one second component from the group Ti, V, Cr, Mn, Fe, Co, Ni, Mo, or any combination thereof.
  • a filler device for the production of a tubular solid body, in particular, a penetrator for a kinetic energy projectile with fragmentation effect
  • the filler device includes: (a) an outer tube ( 2 ) in which an extrusion die ( 3 ) and a filler piece ( 4 ) are attached concentrically; and (b) a filler tube ( 5 ) is placed on the filler piece ( 4 ) for filling the intermediate space ( 8 ), forming between extrusion die ( 3 ) and filler piece ( 4 ), with a metal powder mixture.
  • the eighth embodiment is modified so that the outer tube ( 2 ) is a steel tube and the extrusion die ( 3 ) is a polyurethane tube.
  • the invention is based on the concept of producing such tubes or tubular penetrators, both of whose ends can be open or else one can be closed, in a sintering process without reworking the inner contour.
  • the sintering is carried out with an internal medium in the unworked piece that can easily be removed after the sintering.
  • a uniform contraction is achieved by appropriate pressing methods and temperature progressions during the sintering, as is known for solid bars.
  • the material properties are adjusted by the alloy composition and are made more pronounced by heat treatment, as well as optionally by mechanical shaping.
  • the method can be used for small bars for medium-caliber munitions (e.g., outer diameter 22 mm, inner diameter 15 mm), as sub-caliber large-caliber munitions, and for large bars for full-caliber 120 mm munitions (e.g., outer diameter 120 mm, inner diameter 110 mm).
  • the material is a tungsten heavy metal alloy.
  • the length and diameter are variable and are currently limited not by the method itself, but rather by the conventional manufacturing plants. However, this has the advantage that available manufacturing plants can be used.
  • a filler device comprising an outer tube with concentrically arranged extrusion die, as well as a filler piece with a filler tube and centering part placed thereon, is filled with a metal powder mixture.
  • the length and diameter of the outer tube and extrusion die determine the outer contour, and the geometry of the filler piece determines the inner contour of the tubular solid body.
  • a centering disk of plastic is fixed at one end, and at the other end, the centering takes place via a centering part placed thereon with a filler tube permanently connected thereto.
  • the filler tube enables the cavity between the extrusion die and the filler piece to be filled with a metal powder mixture.
  • the centering part is removed from the filler piece together with the filler tube.
  • the metal powder mixture is filled by hand up to the desired height above the filler piece. After the filling, the extrusion die is closed with a plug.
  • the filler device is placed in a pressing system and pressed to form a green preform.
  • the preform has the shape of a tube closed on one side or open on both sides.
  • the green preform is sintered in one or more passes, as a result of which workpieces with solid body properties are produced from the compact through known measures. For example, tubes for the production of penetrators with very good fragmentation effect are created, which effect can be adjusted via the ratio of inner to outer diameter and the corresponding material or the material composition.
  • FIG. 1 a which shows a filler device in the filling state
  • FIG. 1 b which shows the filler device in the filled (closed) state
  • FIG. 2 which shows a tubular solid body produced according to the method with an end closed on one side.
  • FIGS. 1 a, b show a filler device or filler mold 1 for the production of a tubular solid body 10 , here closed on one side (c.f., FIG. 2 ).
  • the filler device as shown in FIG. 1 a , comprises an outer tube 2 (preferably made of steel), in which bores are situated on the jacket- and base surface at regular intervals.
  • an extrusion die 3 preferably made of polyurethane
  • a filler piece 4 preferably made of metal
  • a filler tube 5 are attached concentrically.
  • the concentricity of the filler piece 4 is ensured by a centering disk 6 (preferably made of polyurethane) at the bottom end, and the centering part 7 of the filler tube 5 placed on the filler piece at the top end.
  • the centering part 7 and the filler tube 5 are permanently connected to one another.
  • An intermediate space 8 forming between the extrusion die 3 and filler piece 4 is filled thereby.
  • the filler device as shown in FIG. 1 b is placed in a hydrostatic pressing system (not shown in more detail, since known) and the metal powder mixture is pressed into a green preform at a pressure of approx. 1500 bar. After removal from the filler device shown in FIG. 1 b, the green preform has the shape of a tube closed on one side and can be handled without breaking.
  • the pressed tubes are subsequently sintered in one or more passes through a furnace (pre-sintering at a temperature between 1400° C. and 1490° C., post-sintering at a temperature between 1495° C. and 1570° C.), so that workpieces with solid body properties are produced from the green preform.
  • the pressed tubes are subjected to a preselected time/temperature progression (i.e., a progression of temperature over time) during the pre- and post-sintering, wherein it is ensured that a melt of tungsten and the remaining binder elements forms in a stable tungsten skeleton, and contracts evenly in all directions, so that after the post-sintering a geometrically desired solid body results, as shown, for example, in FIG. 2 .
  • a preselected time/temperature progression i.e., a progression of temperature over time
  • the solid body is subjected to a heat treatment.
  • a heat treatment E.g., tensile strength, elongation at break, and contraction can be adjusted thereby, depending on the heat treatment.
  • This takes place preferably in an annealing process, in which annealing under high vacuum below the melt temperature of the binder leads to a phase change that, with a subsequent quenching, e.g., in N 2 , leads to the fixing of the material state and thus of the material properties.
  • FIG. 2 shows a tubular solid body for the production of a munition not shown in more detail (for example a kinetic energy projectile with fragmentation effect), which munition has been produced according to the method previously described and has adjusted solid body properties.
  • the munition has, with L g , a predeterminable total length and, with L v , a length of the solid body, and has an inner diameter d i and an outer diameter d a .

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  • 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)
US12/673,424 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 Abandoned US20110176951A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102007037702.0 2007-08-09
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
PCT/EP2008/005800 WO2009018902A1 (de) 2007-08-09 2008-07-16 Vefahren 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

Publications (1)

Publication Number Publication Date
US20110176951A1 true US20110176951A1 (en) 2011-07-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
US12/673,424 Abandoned 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

Country Status (4)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160348231A1 (en) * 2015-05-28 2016-12-01 Materion Corporation Processes for refurbishing a spent sputtering target
US20190017791A1 (en) * 2017-03-07 2019-01-17 U.S. Army Research Laboratory Attn: Rdrl-Loc-I Reduced Jacketed Bullet Bore Resistance
US11320246B2 (en) 2015-10-06 2022-05-03 Rheinmetall Waffe Munition Gmbh Penetrator and sub-caliber projectile
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 (2)

* 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
US5462576A (en) * 1993-06-07 1995-10-31 Nwm De Kruithoorn B.V. Heavy metal alloy and method for its production

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4655984A (en) * 1984-10-15 1987-04-07 Champion Spark Plug Company Method of and apparatus for isostatically pressing a body from particulate material
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
JP4497854B2 (ja) 2003-07-09 2010-07-07 株式会社明電舎 インサート本体の加圧成形体の製造方法及びインサート本体の製造方法
DE102005021982B4 (de) * 2005-05-12 2007-04-05 Rheinmetall Waffe Munition Gmbh Verfahren zur Herstellung eines Penetrators
DE102005049748A1 (de) 2005-10-18 2007-04-19 Rheinmetall Waffe Munition Gmbh Verfahren zur Herstellung eines Penetrators

Patent Citations (2)

* 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
US5462576A (en) * 1993-06-07 1995-10-31 Nwm De Kruithoorn B.V. Heavy metal alloy and method for its production

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160348231A1 (en) * 2015-05-28 2016-12-01 Materion Corporation Processes for refurbishing a spent sputtering target
US11149343B2 (en) * 2015-05-28 2021-10-19 Materion Corporation Processes for refurbishing a spent sputtering target
US11320246B2 (en) 2015-10-06 2022-05-03 Rheinmetall Waffe Munition Gmbh Penetrator and sub-caliber projectile
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

Also Published As

Publication number Publication date
DE102007037702A1 (de) 2009-02-12
EP2173507A1 (de) 2010-04-14
EP2173507B1 (de) 2014-02-26
WO2009018902A1 (de) 2009-02-12

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Legal Events

Date Code Title Description
AS Assignment

Owner name: RHEINMETALL WAFFE MUNITION GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BEISTER, KLAUS-DIETER;OUDELHOVEN, RENE;VAGEDES, MICHAEL;REEL/FRAME:025907/0321

Effective date: 20100210

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION