Other

Bae Systems Bofors Ab

Totalforsvarets Forskningsinstitut

Forsvarets Forskningsanstalt

Exmet Ab

Totalforsvarets Forskningsinstitut (foi)

Abraham Langlet

Ulf Wellmar

Nikolai Latypov

Christer Thuman

Ulf Heiche

Niklas Wingborg

Peter Skoglund

Henric Ostmark

The invention relates to method for pre fragmentation of a warhead () comprising a warhead body (), an explosive charge (), a fin part (), and a warhead shell () with the density &#x3c1;wherein the warhead shell () comprises pre formed cavities (), where each cavity () comprises at least one pre formed projectile () with the density &#x3c1;and filler material or agent () with the density &#x3c1;, wherein the method comprises the following steps: &#x2014;pre formation of the cavities () in the warhead shell (), &#x2014;arrangement of at least one projectile () in each pre formed cavities (), &#x2014;filling of filler material or agent () in the cavities () so that the cavities () are filled, &#x2014;treatment of the filler material or agent () so that the filler material or agent () forms a connected structure vid high adhesiveness to the projectiles () and to the walls of the cavity (). The invention further relates to a pre fragmented warhead.

Pre-fragmentation of warhead

A method of producing three-dimensional bodies which wholly or for selected parts consists of a composite of crystalline or nanocrystalline metal particles in a matrix of amorphous metal. A metal powder layer () is applied onto a heat-conducting base () and limited areas of the layer is melted successively by means of a radiation gun and cooled so that they can be made to solidify into amorphous metal. In connection with the melting of one or several of the limited areas, the radiation gun is regulated so that the melted area is cooled in accordance with a stipulated time-temperature curve in order to form a composite of crystalline or nanocrystalline metal particles in a matrix of amorphous metal. The method is repeated until a continuous layer, which contains composite metal to a desired extent, is formed. A new powder layer () is applied and the method is repeated, the new layer being fused to the underlying layer for successive construction of the three-dimensional body. Alternatively, a layer of only amorphous metal is produced at first, whereupon limited areas of the layer is heated by means of the radiation gun and heat-treated in accordance with the stipulated time-temperature curve in order to transform the amorphous metal into a composite of crystalline or nanocrystalline metal particles in a matrix of amorphous metal.

Method of producing objects containing nano metal or composite metal

A method of producing three-dimensional bodies which wholly or for selected parts consist of amorphous metal. A metal powder layer () is applied to a heat-conducting base (), and a limited area of the layer is melted by a radiation gun () and the area is cooled so that the melted area solidifies into amorphous metal. The melting process is successively repeated on new limited areas of the powder layer until a continuous layer of amorphous metal is formed. A new powder layer is applied and the method is repeated, the new layer being fused to underlying amorphous metal for successive construction of the three-dimensional body. The heat-conducting base can be a worktable or a body of amorphous metal or crystalline metal to which amorphous metal is added.

Method of producing products of amorphous metal

A method of preparing dinitromethane salts usable as intermediate products add starting material for production of explosives and propellants. Substituted 1,2-diazoles, 1,2,4 -triazoles or 1,3-diazines, such as barbituric acid, are nitrated to obtain a gem-dinitro group on a carbon atom in the heterocyclic ring. The product is hydrolysed to split off dinitromethane which is neutralised with a neutralising agent to obtain a corresponding salt of dinitromethane.

Method of preparing salts of dinitromethane

A new compound, 1,1-diamino-2,2-dinitroethylene suitable for use as an explosive, as well as an intermediate for preparing the compound consisting of a heterocyclic 5- or 6-ring of the general formula

Chemical compound suitable for use as an explosive, intermediate and method for preparing the compound

A new chemical compound suitable for use as an explosive consists of guanylurea dinitramide having the formula

Growing community of inventors

Stockholm, Sweden

Abraham Langlet