DE1208656B - Projectile for armor-piercing weapons and method for making such a projectile - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. σ .:

F07f

German class: 72 d- 16/01

Number: 1208 656

File number: K 508411 c / 72 d

Filing date: September 17, 1963

Opened on: January 5, 1966

The invention relates to a projectile, preferably for armor-piercing weapons, consisting from two powder metallurgically manufactured parts of different hardness, and a method for manufacturing of such a projectile. A distinction is made between two groups of projectiles, namely

1. penetrating or armor-piercing projectiles,

2. Bullets that shatter on impact.

A projectile is known which penetrates into the target when it hits the target and at the same time splinters. This creates an effect similar to that of the exploding projectiles above corresponds to the type mentioned under 2. To achieve this, the well-known projectile is made up of two or several parts of different hardness produced by powder metallurgy. Here will be the substances forming the individual parts supplied as a powder to a mold and pressed in this and sintered. This gives the known bullet a great hardness and is at the same time very fragile, see above that on impact it penetrates into the target due to its hardness and at the same time splinters.

In contrast, the invention is based on the opposite object, namely a penetrating To create armor-piercing projectile of the type mentioned under 1 above, in which the risk of fragmentation is reduced to a minimum.

The invention is based on the known teaching described above that also for Solution to the problem underlying the invention, the projectile made of two powder metallurgically produced Parts of different hardness can exist. The invention consists in that the front part made of heavy metal and the rear part of hard metal and both by one or more Binder layers of powder metallurgical type are held together, the binder layers exactly at the transition between the cylindrical, rear part and the conical, rounded one or similarly shaped front part are arranged. This makes in surprising Wise created an armor-piercing projectile, which due to its great hardness and its large Weight has a very great depth of penetration without it splintering on impact.

The fact that the front part consists of heavy metal and the rear part of hard metal can within a volume of a grenade determined for constraint and ballistic reasons or the like. A projectile according to the invention with a desired mass and a suitable, functional projectile for armor-piercing weapons

and methods of making such

Floor

Applicant:

Kohlswa Jernverks Aktiebolag, Kolsva

(Sweden)

Representative:

Dr.-Ing. W. Wolff, H. Bartels and Dr. J. Brandes, patent attorneys, Stuttgart 1, Lange Str. 51

Named as inventor:

Nils Erik Schönberg, Kolsva (Sweden)

Claimed priority:

Sweden of September 18, 1962 (10 053) - -

moderate strength can be fitted into an appropriate jacket.

The heavy metal should be 99 to 80%, preferably about 90%, from tungsten and 1 to 20%, preferably about 10%, composed of a mixture of copper and nickel.

The cemented carbide composition should be 95 to 75%, preferably about 85%, tungsten carbide and 5 to 25%, preferably about 15%, cobalt.

When manufacturing the bullet by powder metallurgy with a hard metal and a Heavy metal part (with compositions given above) can be the various parts are not directly sintered together, as this creates extremely brittle connections in the boundary layer would form. It is also not possible to do the two parts with just one layer from cobalt or with just one layer of a mixture of copper and nickel. According to the invention, in such a case, two layers are used instead, and one made of copper and nickel first of all the heavy metal and one made of cobalt first of all Hard metal.

The invention makes it possible to produce a floor in two parts and the joint directly at the transition between a rear cylindrical part and a conical, rounded or

^: 509 777/124

12O8

similarly shaped front part to lay. This enables grinding and similar machining operations relieved. For the front, profiled part, for example, you can use an easier-to-machine one Select material, while the purely cylindrical part places greater weight on the impact properties can lay. The rear, cylindrical part can also be split into two, if desired or subdivide several parts, which are joined together in the above-mentioned manner.

The projectile according to the invention can be produced in a very simple manner. If you think of powder both for the different parts of the projectile and for the required metal layers from, you can namely produce the projectile in a single pressing process.

Subdivision and connection are the most important Purpose of preventing the cracks formed when they hit the ground. Furthermore, the Floor a certain slight flexibility due to the connecting joint, which increases the tendency when hitting an armored plate at an angle, swivel towards the plate.

The tungsten carbide in the hard metal can be wholly or partially z. B. by titanium or tantalum carbide be replaced.

As stated above, there are considerable advantages when both the different Parts of the projectile and the binder layer are based on powder. In particular In some cases, however, it can also be useful to have a solid metal body with a sintered one Powder-made bodies together.

The pressing and sintering of the various parts of the projectile can either be in the form of pressure sintering with the help of, for example, graphite tools or in the form of hydrostatic pressing With the help of an all-round compressible form. If the floor needs to be processed it is advisable to first carry out a pre-sintering at about 900 ° C., with the various parts do not become harder than that they are relatively easy to grind or otherwise work on. Finally, the product is highly sintered at around 1300 to 1400 ° C.

The drawing shows in the form of an example a projectile according to the invention, in which a front, Ogival part 1, a rear, cylindrical part with 2 and two binder layers with 3 and 4 are designated.

The front part 1 is made of heavy metal with the composition of 90% tungsten and 10% a mixture of copper and nickel. The rear part 2, on the other hand, consists of hard metal with a composition made of 85% tungsten carbide and 15% cobalt. Layer 3 consists of a mixture of copper and nickel, and layer 4 consists made of cobalt. The projectile shown in the form of an example is produced from powder in a single pressing process.

Claims (4)

Patent claims: 1st projectile, preferably for armor-piercing weapons, consisting of two powder metallurgy manufactured parts of different hardness, characterized in that the front • - Part (1) made of heavy metal and the rear part '(2) made of hard metal and both through a γ or more binder layers (3 and 4) powder metallurgical Art are held together, the binder layers (3, 4) exactly the transition between the cylindrical, rear part (2) and the conical, rounded one or similarly shaped front part (1) are arranged. 2. Projectile according to claim 1, characterized in that the heavy metal is a composition from 99 to 80%, preferably about 90%, tungsten and 1 to 20%, preferably about 10%, a mixture of copper and Nickel, while the hard metal has a composition of 95 to 75%, preferably about 85%, tungsten carbide and 5 to 25%, preferably about 15%, cobalt 3. Projectile according to claims 1 and 2, characterized in that the heavy metal (1) Adjacent binder layer (3) made of copper and nickel and the hard metal (2) Adjacent binder layer (4) consists of cobalt. 4. A method for producing a projectile according to any one of claims 1 to 3 on powder metallurgy Ways, characterized in that the individual powder layers for forming the parts (1 and 2) and the binder layers (3 and 4) are stacked in a mold and pressed. Considered publications:
British Patent Nos. 455,910, 538,268. 1 sheet of drawings 509 777/124 12.65 © Bundesdruckerei Berlin