FR2487966A1 - IMPROVEMENTS ON COATINGS FOR FORMED EXPLOSIVE CHARGES - Google Patents

Abstract

COPPER BASED COATING FOR SHAPED EXPLOSIVE LOAD, SUCH AS HOLLOW LOAD, DEFORMABLE PLATE LOAD, CHARACTERIZED BY AN ADDITION OF NOBLE METAL SUCH AS: SILVER, GOLD, PLATINUM.

Description

1 2487966

  For the construction of coatings for explosive charges

  mées (hollow charges, hollow charges "with deformable base" launching a core, called "self-forging"), dense, ductile, malleable materials are generally used, supporting very rapid deformations without breaking under the effect of ultra-pressures generated by the detonation. Thus, tantalum is taking an increasing place in the technique of

  "self-forging", while copper still retains

  days, by its own qualities, its preponderant place in the technique

shaped charges.

  However, even in the case of copper, and from the origin of the charges

  modern high performance hollow (4 to 5 calibers, 1st and 2nd generation)

  tions, double decade of the 50s and 60s), we quickly turned to very high purity copper (99.99%), more oxygen-free, which allows it to withstand, without cracking or cracking, deformations inherent in the ultra-fast phenomenon of operation, quality verified, lot

  by batch, by very specific folding tests.

  The present invention provides an improvement in copper for

  garment of explosive charges formed, the purpose of which is to increase both the density and the capacity of deformation without rupture, crack, crack, etc. An increase in the length of the jet is thus obtained, an increase

  of its specific mass and its continuity, o direct improvement of the

  see perforating and terminal effect.

  In accordance with the invention, the copper in the coating has a

  addition of a noble metal such as: silver, gold, platinum. The capabilities of

  formation of these noble metals and their density give the alloy thus formed,

  according to the invention, the characteristics precisely sought, such as

  peeled higher, to raise the perforating power of the terminal effect of a

explosive charge formed.

  The content of the noble metal addition can also be moderate

  without departing from the scope of the invention, it may be only a few%.

  In addition, noble metal coatings have been made in the past. But the price of these metals does not allow them to be used for serial products, even if they are tactical missiles. On the other hand, the copper-based alloy, with the addition of silver or gold or platinum, all 224P 7 'w7 5? remaining reasonably priced, provides all the benefits and progress

mentioned above.

  Added to this is the possibility of adapting, by conventional metallurgical and mechanical processes (heat treatment, wrinkling, flow forming, stamping, etc.), the characteristics of the alloy: particle size,

  hardness, elongation, necking, elastic limit, etc ..., in the specific case of em-

  bend: hollow load coating or deformable plate, caliber, thick-

  sor, shape, explosive charge, nature of the explosive, waveform of

detonation, etc ...

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Claims (4)

REVENDICAII ONS   1 - Coating based on copper for explosive charge formed, such as hollow charge, charge with deformable base, characterized by a   addition of noble metal such as: silver, gold, platinum.   2 - Coating according to claim 1, characterized by an addi-   tion of low content, a few percent.   3 - coating according to any one of claims 1 or 2,   characterized by mechanical or metallurgical treatment, such as   thermal, wrought, deep drawing, flow forming ... determining, depending on the use case, the optimal characteristics of the alloy, such as   as grain size, hardness, elongation, necking, elastic limit.   4 - Explosive charge formed, such as hollow charge, charge with deformable base, ... comprising a coating according to any one of the preceding claims. -