CORE OF ARMOR-PIERCING BULLET FROM HARD ALLOY FOR SMALL ARMS, BULLET IN WHICH CORE IS USED, CARTRIDGE IN WHICH BULLET IS USED Russian patent published in 2024 - IPC F42B12/04 F42B12/06 F42B30/02 

FIELD: weapons.

SUBSTANCE: group of inventions relates to ammunition, namely to a core of an armour-piercing bullet from a hard alloy for small arms, a bullet for small arms, in which a core is used, and a cartridge in which a bullet is used. Core of armour-piercing bullet from hard alloy for small arms, in which hard alloy contains tungsten carbide by weight of not more than 97%, the rest is cobalt. Core has ultimate bending strength of at least 1160 MPa. Core includes head and tail parts. Tail part of the core has the shape of a truncated cone, the larger diameter of the base of which is equal to the diameter of the base of the cone of the head part. Head part of the core has the shape of a cone with a top in the form of a segment of a hemisphere. Length of the core is mm. Head part cone angle is equal to 40 ± 30'. Top of head part has spherical curvature with radius of 0.5 mm with diameter of section circle of not more than 0.9 mm. Diameter of the base of the cone of the head part has a size of mm. Length of the head part of the core is formed by the tool, in which it is equal to 4.69 mm. Smaller diameter of truncated cone of tail part has size of not more than 3.85 mm. Core weight is equal to 2.15–2.29 g. Surfaces of the core have roughness Rz of not more than 1.6 mcm, Ra of not more than 0.6 mcm and are obtained by vibration tumbling.

EFFECT: increased penetration capacity of metal armour with hard-alloy core and increased damage beyond the obstacle, reduction of rejects at pressing of workpieces, reduction of labour intensity of core manufacturing.

4 cl, 2 dwg, 2 tbl