GB2081428A - Claddings for shaped explosive charges - Google Patents
Claddings for shaped explosive charges Download PDFInfo
- Publication number
- GB2081428A GB2081428A GB8122764A GB8122764A GB2081428A GB 2081428 A GB2081428 A GB 2081428A GB 8122764 A GB8122764 A GB 8122764A GB 8122764 A GB8122764 A GB 8122764A GB 2081428 A GB2081428 A GB 2081428A
- Authority
- GB
- United Kingdom
- Prior art keywords
- copper
- charge
- cladding
- shaped explosive
- noble metal
- 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
Links
- 238000005253 cladding Methods 0.000 title claims abstract description 24
- 239000002360 explosive Substances 0.000 title claims abstract description 18
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 13
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 7
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052737 gold Inorganic materials 0.000 claims abstract description 7
- 239000010931 gold Substances 0.000 claims abstract description 7
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 7
- 229910052709 silver Inorganic materials 0.000 claims abstract description 7
- 239000004332 silver Substances 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 18
- 239000010949 copper Substances 0.000 claims description 18
- 239000000956 alloy Substances 0.000 claims description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000004429 Calibre Substances 0.000 claims description 4
- 238000005474 detonation Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000007514 turning Methods 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 2
- 238000010304 firing Methods 0.000 claims description 2
- 238000005242 forging Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000010297 mechanical methods and process Methods 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 229910052715 tantalum Inorganic materials 0.000 claims description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 2
- 229910000881 Cu alloy Inorganic materials 0.000 abstract 1
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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Powder Metallurgy (AREA)
- Coating By Spraying Or Casting (AREA)
- Forging (AREA)
Abstract
A cladding for a shaped explosive charge, such as a hollow charge or a charge having a deformable seat, comprises a copper alloy with the addition of a small amount of a noble metal such as silver, gold or platinum.
Description
SPECIFICATION
Improvements in claddings for shaped explosive charges
For the purpose of forming claddings for shaped explosive charges (hollow charges including those comprising a "deformable seat" for firing what is called a "self-forging missile"), use is generally made of dense, ductile, malleable materials which are able to withstand very rapid deformation under the effect of the very high pressures set up by detonation without rupturing.
Thus, tantalum is assuming an every-increasing role in the "deformable seat" technique ("selfforging"), whereas, because of its inherent properties, copper continues to retain its preponderant role in the hollow charge technique.
However, even in the case of copper and since the introduction of high-performance modern hollow charges (4 to 5 calibre, first and second generations, during the fifties and sixties), there has been a rapid change towards the use of very high purity copper (99.99%), deoxidized more completely so that it is able to withstand, without fissuring or cracking, the deformations associated with operations carried out at very high speeds, this quality having been verified on a batchwise basis in very special bend tests.
The present invention is concerned with improving the quality of the copper used for the cladding of shaped explosive charges, and its object is to increase the density of the copper as well as its ability to deform without developing breaks, fissures, cracks etc. Thus, increase in the length of the jet, its specific mass and its continuity are obtained, and this leads to immediate improvement in the piercing capacity and the final effect.
According to the invention, the copper constituting the cladding comprises an addition of a noble metal such as silver, gold or platinum. The ability of these noble metals to deform and their density impart to the alloy, thus formed, the specific properties, referred to above, required for increasing the piercing capacity and the final effect of a shaped explosive charge.
The amount of the added noble metal may be varied; within the framework of the invention, it may be only a few percent.
Noble metal claddings have been developed in the past. However, the cost of these metals does not permit them to be used for series-production purposes, even where tactical missiles are concerned.
On the other hand, the copper-based alloy, having an addition of silver, gold or platinum, while reasonably priced, provides ail the advantages and advances mentioned above.
It is also possible, by means of conventional metallurgical and mechanical methods (heattreatment, rolling, turning involving flow of metal, deep-drawing and so on) to vary such properties of the alloy as particie-size, hardness, elongation, reduction of area, elastic limit, etc., to suit the particular use requirement: cladding of hollow charge or deformable seat, calibre, thickness, shape, explosive charge, type of explosive, form of detonation wave, etc.
1. A copper-based cladding for a shaped explosive charge, such as a hollow charge or a charge having a deformable seat, wherein the cladding is constituted by a copper-based alloy with an addition of a noble metal such as silver, gold or platinum.
2. A cladding according to Claim 1, wherein the noble metal is present in a small amount only, e.g. a few percent.
3. A cladding according to Claim 1 or Claim 2, which has been subjected to a mechanical or metallurgical treatment such as heat-treatment, rolling, deep-drawing, or turning involving flow, to develop results in optimum properties of the alloy such as particle-size, hardness, elongation, reduction of area and elastic limit, depending upon the intended use.
4. A shaped explosive charge, such as a hollow charge or a charge having a deformable seat, comprising a cladding as defined in any one of the preceding Claims.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (4)
1. A copper-based cladding for a shaped explosive charge, such as a hollow charge or a charge having a deformable seat, wherein the cladding is constituted by a copper-based alloy with an addition of a noble metal such as silver, gold or platinum.
2. A cladding according to Claim 1, wherein the noble metal is present in a small amount only, e.g. a few percent.
3. A cladding according to Claim 1 or Claim 2, which has been subjected to a mechanical or metallurgical treatment such as heat-treatment, rolling, deep-drawing, or turning involving flow, to develop results in optimum properties of the alloy such as particle-size, hardness, elongation, reduction of area and elastic limit, depending upon the intended use.
4. A shaped explosive charge, such as a hollow charge or a charge having a deformable seat, comprising a cladding as defined in any one of the preceding Claims.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8017029A FR2487966B1 (en) | 1980-08-01 | 1980-08-01 | IMPROVEMENTS ON COATINGS FOR FORMED EXPLOSIVE CHARGES |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2081428A true GB2081428A (en) | 1982-02-17 |
GB2081428B GB2081428B (en) | 1984-01-18 |
Family
ID=9244800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8122764A Expired GB2081428B (en) | 1980-08-01 | 1981-07-23 | Claddings for shaped explosive charges |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE889823A (en) |
CH (1) | CH645976A5 (en) |
DE (1) | DE3129530A1 (en) |
FR (1) | FR2487966B1 (en) |
GB (1) | GB2081428B (en) |
IT (1) | IT1144438B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4498367A (en) * | 1982-09-30 | 1985-02-12 | Southwest Energy Group, Ltd. | Energy transfer through a multi-layer liner for shaped charges |
DE3525613A1 (en) * | 1985-07-18 | 1987-01-22 | Rheinmetall Gmbh | INSERT FOR PUTTING A BLAST CHARGE AND FORMING A ROD-SHAPED PROJECTILE AND METHOD FOR PRODUCING THE INSERT |
FR2599648B1 (en) * | 1986-06-10 | 1995-06-30 | Saint Louis Inst | PROCESS FOR THE MANUFACTURE OF A HOLLOW LOAD COATING |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1086048A (en) * | 1953-07-02 | 1955-02-09 | Soc Tech De Rech Ind | Improvements to coatings for crense loads |
US3112700A (en) * | 1959-12-11 | 1963-12-03 | Jr John W Gehring | Eutectic alloy shaped charge liner |
FR1531530A (en) * | 1967-05-22 | 1968-07-05 | Alsetex Soc Alsacienne D Etude | Advanced training in shaped charges |
FR1327804A (en) * | 1962-04-09 | 1963-05-24 | Soc Tech De Rech Ind | Improvements to coatings for shaped charges |
FR2268242B1 (en) * | 1974-04-17 | 1978-07-21 | Poudres & Explosifs Ste Nale | |
FR2429990B1 (en) * | 1978-06-27 | 1985-11-15 | Saint Louis Inst | EXPLOSIVE FLAT CHARGE |
-
1980
- 1980-08-01 FR FR8017029A patent/FR2487966B1/en not_active Expired
-
1981
- 1981-07-23 GB GB8122764A patent/GB2081428B/en not_active Expired
- 1981-07-27 DE DE19813129530 patent/DE3129530A1/en active Granted
- 1981-07-27 IT IT68042/81A patent/IT1144438B/en active
- 1981-07-30 CH CH495381A patent/CH645976A5/en not_active IP Right Cessation
- 1981-07-31 BE BE0/205554A patent/BE889823A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CH645976A5 (en) | 1984-10-31 |
FR2487966B1 (en) | 1986-07-11 |
IT1144438B (en) | 1986-10-29 |
BE889823A (en) | 1981-11-16 |
DE3129530C2 (en) | 1989-12-21 |
IT8168042A0 (en) | 1981-07-27 |
GB2081428B (en) | 1984-01-18 |
DE3129530A1 (en) | 1982-06-03 |
FR2487966A1 (en) | 1982-02-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |