RU2247307C1 - Hard-alloy bullet slug - Google Patents

Abstract

FIELD: high-piercing effect ammunition.

SUBSTANCE: the bullet slug is made of hard-alloy material having ultimate strength ≥ 3850 Mpa and containing cobalt within 5.6 to 10.2%. The slug consists of a nose section having a front flat end face and a cylinder-shaped tail section. The nose section is formed at length L₁≈0.5L with a radius of 56 mm with the center distant from the front flat end face at a distance of 11.93 mm, where L-the slug length.

EFFECT: enhanced piercing effect.

1 dwg, 3 ex, 3 tbl

Description

The proposed solution relates to ammunition.

There is a known (1, RF patent No. 2159940) solution in which the bullet contains a carbide core with a pointed or flat end (the closest analogue).

The disadvantage of this solution is the relatively low breakdown action of the bullet, which is associated with suboptimal dimensions of the core and the properties of the material from which it is made.

Moreover, the solution structurally stipulates the size of the bullet and the length of the core in relation to the length of the bullet. This is not enough to determine the remaining dimensions of the core.

The technical result of the proposed solution is to increase the breakdown effect by increasing the properties of the hard alloy material of the core, affecting the breakdown effect.

The technical result is achieved in that the bullet core is made of carbide material having a tensile strength ≥ 3850 MPa and containing cobalt in the range of (5.6-10.2)%, and consists of a head part having a front flat end and a tail part of a cylindrical forms, with the head part formed at a length L ₁ ≈ 0.5L with a radius of 56 mm with a center spaced from the front flat end with a diameter of 2 mm at a distance of 11.93 mm, where L is the core length.

The drawing shows the geometric parameters.

The core is arranged as follows. It consists of a head part 1 with a flat end 2 with a diameter of 2 mm, a length L ₁ formed by a radius of a nominal value of 56 mm with a center spaced from the front flat end at a distance of 11.93 mm, the length L ₁ being approximately half the total length of the core L and the tail of the cylindrical shape 3.

The core is made of carbide material. The influence of material properties on the achievement of a technical result is shown below by examples.

Example 1

The material VK8 was used, containing 8% cobalt (the middle of the proposed range), total carbon 5.4%, oxygen 0.2%, the rest was tungsten.

The density of 14.55 g / cm ³ .

Hardness HRA 88.

Bending strength 1700 n / mm ² .

The compressive strength is 4000 MPa.

The macrostructure is homogeneous without foreign inclusions, shells and delamination.

Evidence of the effectiveness of the proposed solution is given in table 1.

Table 1 Controlled parameter Prototype Proposed solution Punching action, i.e. % penetration at a distance of 100 m of a steel sheet 18 mm thick 60 80

Example 2

Used material VK6 containing cobalt 5.6%. The contents of the remaining components and properties change accordingly.

The compressive strength is 4300 MPa.

The macrostructure is homogeneous without foreign inclusions, shells and delamination.

Evidence of the effectiveness of the proposed solution is given in table.2.

table 2 Controlled parameter Prototype Proposed solution Punching action, i.e. % penetration at a distance of 100 m of a steel sheet 18 mm thick 60 65

Example 3

Used material VK10 containing cobalt 10.2%. The contents of the remaining components and properties change accordingly.

The compressive strength is 3850 MPa.

The macrostructure is homogeneous without foreign inclusions, shells and delamination.

Evidence of the effectiveness of the proposed solution is given in table.3.

Table 3 Controlled parameter Prototype Proposed solution Punching action, i.e. % penetration at a distance of 100 m of a steel sheet 18 mm thick 60 70

Claims (1)

Bullet core made of carbide material and consisting of a head part having a front flat end and a tail part of a cylindrical shape, characterized in that the core is made of a material having a tensile strength of ≥3850 MPa and containing cobalt in the range (5.6-10 , 2)%, the head part is formed on a length L ₁ = 0.5L with a radius of 56 mm with a center spaced from the front flat end with a diameter of 2 mm at a distance of 11.93 mm, where L is the length of the core.