EP0007695A1 - Zersplitternder Geschossmantel - Google Patents

Zersplitternder Geschossmantel Download PDF

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Publication number
EP0007695A1
EP0007695A1 EP79301093A EP79301093A EP0007695A1 EP 0007695 A1 EP0007695 A1 EP 0007695A1 EP 79301093 A EP79301093 A EP 79301093A EP 79301093 A EP79301093 A EP 79301093A EP 0007695 A1 EP0007695 A1 EP 0007695A1
Authority
EP
European Patent Office
Prior art keywords
projectile
zinc
frangible
alloy
projectile body
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Withdrawn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
EP79301093A
Other languages
English (en)
French (fr)
Inventor
Richard P. Sernka
Richard A. Harlow
Theodore J. Koppenaal
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.)
Space Systems Loral LLC
Original Assignee
Ford Aerospace and Communications Corp
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 Ford Aerospace and Communications Corp filed Critical Ford Aerospace and Communications Corp
Publication of EP0007695A1 publication Critical patent/EP0007695A1/de
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C18/00—Alloys based on zinc
    • C22C18/04—Alloys based on zinc with aluminium as the next major constituent
    • 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
    • F42B12/72—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material
    • F42B12/76—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material of the casing

Definitions

  • the present invention is concerned with ammunition projectiles having frangible bodies (that is, bodies which fragment upon impact with a target).
  • Projectiles having frangible bodies have been proposed, for example, in U.S. Patents 2,995,090, 3,570,406, 3902,683 and 3,951,035.
  • Such projectiles generally have a body which is encapsulated in a polymeric material and/or formed from metal particles bonded with a polymeric binder.
  • Such bodies require special processing.
  • a frangible ammunition projectile at least the body of which is a die-casting formed of a brittle zinc-based alloy.
  • the projectiles according to the invention may be, for example, target practice rounds or rounds for short-range use.
  • the zinc-based alloy which constitutes the body of the projectile according to the invention should be one which consists of a zinc matrix and one or more embrittling alloying elements (that is, elements which provide easy paths of fracture,for example, along grain boundaries of intermetallic compounds formed by the zinc matrix and the alloying element(s) ).
  • the alloy preferably contains at least 80% by weight, more preferably, at least 85% by weight of zinc.
  • Such a zinc-based alloy preferably contains aluminium in an amount of up to 12% by weight (more preferably 8 to 12% by weight) and, optionally, a minor amount of other metals such as copper or copper and magnesium, the latter being preferably present in an amount of up to 0.1% by weight.
  • Other zinc-based alloys which may be employed include alloys containing manganese,cadmium, antimony, tin, magnesium, copper, nickel, cobalt, or iron.
  • the exact choice of ingredients for the brittle alloy depends on a number of criteria, such as the size and design of the projectile body, the ; nature of the expected impact with the target and the launch stresses to be encountered.
  • the alloy preferably has a dynamic yield strength ; of more than 35 ksi; this enables the body to survive typical launch stresses consistently, so that ballistically consistent results can be obtained.
  • Suitable zinc-based alloys for use according to the invention are given in the I following Table, together with their dymamic yield strengths and, in some cases, their ability to survive a typical launch stress.
  • the physical properties of such alloys may be modified, for example, by heat treating, or quenching cycles. Such modifying treatments are desirably effected when they increase the dynamic yield strength and thereby promote resistance to launch stress. For example, we have found that heat treatment of certain alloys (such as alloys 5 and 8 identified in the above Table) at 360°C for 1 to 4 hours results in improved physical properties for use according to the invention.
  • the body of the projectile is a die casting. This may constitute the whole of the projectile or there may be a separate nose-tip of the same material or of a different material, or a core of a different material. When a core or separate nose-tip is employed, it may be of aluminium, graphite-epoxy (or other plastics material) or graphite, for example.
  • a rotating band (for example, of zinc, copper or plastics) may be applied to the projectile, as is conventional.
  • FIG. 2 is an exploded view of a projectile having a hollow die-cast frangible body and a frangible body cap adapted to fit in the hollow body.
  • frangible body shown is trimmed, sized and machined as necessary to the desired dimensions after die casting and then a rotating band is applied as described above.
  • the body cap may be fabricated from a variety of materials, including aluminium alloys (such as 6061) or the same zinc-based alloy as the body.
  • the cap may be a die casting, but it may also be made by screw machining. After fabrication, the cap is press-fitted into the body.
EP79301093A 1978-06-09 1979-06-08 Zersplitternder Geschossmantel Withdrawn EP0007695A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US91398978A 1978-06-09 1978-06-09
US913989 1986-10-01

Publications (1)

Publication Number Publication Date
EP0007695A1 true EP0007695A1 (de) 1980-02-06

Family

ID=25433784

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79301093A Withdrawn EP0007695A1 (de) 1978-06-09 1979-06-08 Zersplitternder Geschossmantel

Country Status (1)

Country Link
EP (1) EP0007695A1 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073453A1 (de) * 1981-08-27 1983-03-09 Honeywell Inc. Verfahren zur Herstellung eines Übungsgeschosses
GB2123123A (en) * 1982-07-01 1984-01-25 Honeywell Inc Projectiles
US4620484A (en) * 1981-10-26 1986-11-04 Polyzive Practice bomb
FR2609540A1 (fr) * 1987-01-14 1988-07-15 Messac Eric Amelioration aux balles pour armes a feu
FR2609541A1 (fr) * 1987-01-09 1988-07-15 Viotte Jean Marc Ogive pour armes a feu individuelles
FR2611262A1 (fr) * 1987-02-25 1988-08-26 Jack Smadja Nouveau projectile de grande vitesse initiale pour armes a feu
WO1997006401A3 (en) * 1995-08-03 1997-04-10 Federal Hoffmann Inc Non-toxic frangible bullet
US6598536B2 (en) * 2000-11-23 2003-07-29 Oerlikon Contraves Pyrotec Ag Munitions with shattering penetrator cartridge case
US6646141B2 (en) 2000-02-07 2003-11-11 Degussa Ag Process for the epoxidation of olefins
FR2923003A1 (fr) * 2007-10-24 2009-05-01 Nexter Munitions Sa Obus d'exercice fragmentable.
US9329009B1 (en) 2013-03-15 2016-05-03 Vista Outdoor Operations Llc Manufacturing process to produce programmed terminal performance projectiles

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE452009A (de) *
US1852442A (en) * 1930-08-21 1932-04-05 New Jersey Zinc Co Zinc-base die-casting alloy
US2102869A (en) * 1936-08-26 1937-12-21 New Jersey Zinc Co Zinc alloys
CH218110A (de) * 1939-12-14 1941-11-30 Krupp Ag Ubungsgeschoss.
DE715511C (de) * 1937-02-02 1941-12-23 Metallgesellschaft Ag Verwendung von Zinklegierungen fuer Tiefziehzwecke
US2991718A (en) * 1959-06-15 1961-07-11 Ralph M Ferguson Disintegrating ammunition for machine gun and cannon
US3440963A (en) * 1967-08-15 1969-04-29 Peter L De Luca Dummy warhead for rocket,missile or the like
FR2229036A1 (de) * 1973-05-09 1974-12-06 Haut Rhin Manufacture Machines

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE452009A (de) *
US1852442A (en) * 1930-08-21 1932-04-05 New Jersey Zinc Co Zinc-base die-casting alloy
US2102869A (en) * 1936-08-26 1937-12-21 New Jersey Zinc Co Zinc alloys
DE715511C (de) * 1937-02-02 1941-12-23 Metallgesellschaft Ag Verwendung von Zinklegierungen fuer Tiefziehzwecke
CH218110A (de) * 1939-12-14 1941-11-30 Krupp Ag Ubungsgeschoss.
US2991718A (en) * 1959-06-15 1961-07-11 Ralph M Ferguson Disintegrating ammunition for machine gun and cannon
US3440963A (en) * 1967-08-15 1969-04-29 Peter L De Luca Dummy warhead for rocket,missile or the like
FR2229036A1 (de) * 1973-05-09 1974-12-06 Haut Rhin Manufacture Machines

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073453A1 (de) * 1981-08-27 1983-03-09 Honeywell Inc. Verfahren zur Herstellung eines Übungsgeschosses
US4620484A (en) * 1981-10-26 1986-11-04 Polyzive Practice bomb
GB2123123A (en) * 1982-07-01 1984-01-25 Honeywell Inc Projectiles
FR2609541A1 (fr) * 1987-01-09 1988-07-15 Viotte Jean Marc Ogive pour armes a feu individuelles
FR2609540A1 (fr) * 1987-01-14 1988-07-15 Messac Eric Amelioration aux balles pour armes a feu
FR2611262A1 (fr) * 1987-02-25 1988-08-26 Jack Smadja Nouveau projectile de grande vitesse initiale pour armes a feu
WO1997006401A3 (en) * 1995-08-03 1997-04-10 Federal Hoffmann Inc Non-toxic frangible bullet
US5679920A (en) * 1995-08-03 1997-10-21 Federal Hoffman, Inc. Non-toxic frangible bullet
US6646141B2 (en) 2000-02-07 2003-11-11 Degussa Ag Process for the epoxidation of olefins
US6598536B2 (en) * 2000-11-23 2003-07-29 Oerlikon Contraves Pyrotec Ag Munitions with shattering penetrator cartridge case
FR2923003A1 (fr) * 2007-10-24 2009-05-01 Nexter Munitions Sa Obus d'exercice fragmentable.
US9329009B1 (en) 2013-03-15 2016-05-03 Vista Outdoor Operations Llc Manufacturing process to produce programmed terminal performance projectiles
US9360284B1 (en) 2013-03-15 2016-06-07 Vista Outdoor Operations Llc Manufacturing process to produce metalurgically programmed terminal performance projectiles

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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): BE CH DE GB NL SE

17P Request for examination filed
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: 19811020

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SERNKA, RICHARD P.

Inventor name: HARLOW, RICHARD A.

Inventor name: KOPPENAAL, THEODORE J.