EP0332745A1 - Procédé pour la fabrication d'un revêtement pour une charge explosive - Google Patents

Procédé pour la fabrication d'un revêtement pour une charge explosive Download PDF

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Publication number
EP0332745A1
EP0332745A1 EP88118297A EP88118297A EP0332745A1 EP 0332745 A1 EP0332745 A1 EP 0332745A1 EP 88118297 A EP88118297 A EP 88118297A EP 88118297 A EP88118297 A EP 88118297A EP 0332745 A1 EP0332745 A1 EP 0332745A1
Authority
EP
European Patent Office
Prior art keywords
iron material
less
iron
grain size
deformation
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.)
Granted
Application number
EP88118297A
Other languages
German (de)
English (en)
Other versions
EP0332745B1 (fr
Inventor
Jörg Dr. Peters
Herberg Weisshaupt
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 Industrie AG
Original Assignee
Rheinmetall 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 GmbH filed Critical Rheinmetall GmbH
Publication of EP0332745A1 publication Critical patent/EP0332745A1/fr
Application granted granted Critical
Publication of EP0332745B1 publication Critical patent/EP0332745B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
    • F42B1/02—Shaped or hollow charges
    • F42B1/032—Shaped or hollow charges characterised by the material of the liner

Definitions

  • the invention relates to a method for producing an insert from a low-carbon iron material for covering an explosive charge.
  • Deposits for filling explosive charges generally consist of iron or copper; Copper is usually used for deposits of pointed cone shaped charges.
  • the insert material should have a high ductility and a high degree of purity in order to avoid possible deformation hardening.
  • the insert of a flat cone charge consists of an alloy which has a sufficiently high tantalum content to achieve a density which is greater than that of the copper.
  • the alloy can contain other metals such as tungsten, molybdenum or niobium.
  • the required high ductility is no longer guaranteed.
  • alloys have a high ductility but only an unsatisfactory power conversion in the target, or a small depth of penetration into, for example, an armor plate.
  • Armco iron a merican olling r and m ining ompany c
  • a typical analysis of Armco iron shows the following values given in percent by weight: 0.015% C; 0.02% Si; 0.002% Mn; 0.05% P; 0.022% S; 0.01% N; the total contamination is about 0.1%.
  • Armco-Eisen does not meet the requirements placed on an insert material for the loading of explosive charges. Inlays with reproducibly the same behavior cannot be produced from different batches of Armco iron melted at different times, since when the material is rolled down, anisotropies or coarse grains occur in the rolling texture, which are expressed, for example, by the fact that the final shaping of a flat one Slice to form a flat cone insert or a spherical cap-shaped insert shell, uneven surface structures (orange peel and tensile strength) form.
  • an iron material for deposits for covering explosive charges can be produced in a reproducible manner, in which the deposits produced therefrom show a completely isotropic behavior.
  • the soothing pouring of the molten iron material which has been refreshed to a carbon content of less than 0.01 wt.
  • the heavily decarburized molten steel can optionally also be subjected to vacuum degassing.
  • a batch of e.g. B. about 60 to 100 tons of cast steel in the continuous casting process (calmed here).
  • the continuous casting mold has a cross-sectional area of approximately 2 m x 0.2 m.
  • the solidified cast steel strand is cut to lengths of about 10 m and cooled.
  • the continuous casting is heated to the desired forming temperature.
  • the iron material according to the invention is used for austenitizing, i.e. H. for the dissolution and fine distribution of aluminum nitrides at approx. 1250 ° C, e.g. B. annealed in a pusher furnace before it is hot-rolled on a hot strip mill for temperature and deformation-dependent predeterminable, in particular homogeneous structure adjustment with a grain size of less than 100 microns.
  • the forming temperature during hot rolling must be greater than 880 ° C.
  • hot rolling is also possible at temperatures up to 1200 ° C., since the coarse-grain recrystallization in the iron material according to the invention is additionally inhibited or prevented by the finely dispersed Al nitrides.
  • the rolling process is carried out with the greatest possible degree of deformation of greater than 0.35, preferably about 0.45, so that the smallest possible number of passes (rolling mill passes) enables the fine grain structure with grain sizes of 15 to 80 ⁇ m, preferably between 20 and 30 ⁇ m, to be adjusted by a controlled final rolling.
  • the iron material (SSR) according to the invention is characterized by a very conspicuous lying together of the yield strength with approx. 290 N / mm2 and tensile strength with approx. 300 N / mm2.
  • the iron material according to the invention has an extremely high deep-drawing quality and, because of its homogeneity, does not show any preferred orientations when it is formed. It is therefore particularly suitable for deposits of all types (hollow-tipped, tapered cones, dome-shaped deposits) that are projectile or jet-forming as well as for cutting loads.
  • the iron material (SSR) according to the invention can be reproduced in particular for explosive-shaped projectiles, in which a projectile length of greater than 1 in relation to the insert caliber can hereby be easily achieved speed, homogeneity and its isotropic deformation behavior with even rear formation of the rod-shaped projectile body without constrictions, since no cracks, folds or asymmetries occur.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Articles (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
EP88118297A 1988-03-18 1988-11-03 Procédé pour la fabrication d'un revêtement pour une charge explosive Expired - Lifetime EP0332745B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3809051A DE3809051A1 (de) 1988-03-18 1988-03-18 Verfahren zur herstellung einer einlage zum belegen einer sprengstoffladung
DE3809051 1988-03-18

Publications (2)

Publication Number Publication Date
EP0332745A1 true EP0332745A1 (fr) 1989-09-20
EP0332745B1 EP0332745B1 (fr) 1991-12-27

Family

ID=6350042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88118297A Expired - Lifetime EP0332745B1 (fr) 1988-03-18 1988-11-03 Procédé pour la fabrication d'un revêtement pour une charge explosive

Country Status (4)

Country Link
US (1) US5028275A (fr)
EP (1) EP0332745B1 (fr)
JP (1) JPH0278900A (fr)
DE (2) DE3809051A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993021135A1 (fr) * 1992-04-10 1993-10-28 Bofors Explosives Ab Procedes de production d'explosifs avec addition de metaux a reaction exothermique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3931050A1 (de) * 1989-09-16 1991-03-28 Bosch Gmbh Robert Pruefeinrichtung fuer beschleunigungssensoren
FR2729596A1 (fr) * 1992-05-07 1996-07-26 Commissariat Energie Atomique Procede de fabrication de pieces metalliques par forgeage libre et matricage sous presse

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1057293A (fr) * 1952-05-23 1954-03-08 Soc Tech De Rech Ind Perfectionnements aux revêtements de charges creuses pour engins explosifs
BE671317A (fr) * 1964-11-26 1966-02-14

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE358514A (fr) * 1929-01-26
JPS5433704B2 (fr) * 1973-05-10 1979-10-22
FR2429990B1 (fr) * 1978-06-27 1985-11-15 Saint Louis Inst Charge explosive plate
JPS59118861A (ja) * 1982-12-27 1984-07-09 Daido Steel Co Ltd 快削鋼の製造方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1057293A (fr) * 1952-05-23 1954-03-08 Soc Tech De Rech Ind Perfectionnements aux revêtements de charges creuses pour engins explosifs
BE671317A (fr) * 1964-11-26 1966-02-14

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993021135A1 (fr) * 1992-04-10 1993-10-28 Bofors Explosives Ab Procedes de production d'explosifs avec addition de metaux a reaction exothermique

Also Published As

Publication number Publication date
EP0332745B1 (fr) 1991-12-27
DE3809051A1 (de) 1989-09-28
US5028275A (en) 1991-07-02
JPH0278900A (ja) 1990-03-19
DE3867229D1 (de) 1992-02-06

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