Frangible metal bullets, ammunition and method of making...

F - Mech Eng,Light,Heat,Weapons – 42 – B

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Details

F42B 12/74 (2006.01) B22F 3/16 (2006.01) F42B 8/14 (2006.01) F42B 10/00 (2006.01)

Patent

CA 2329617

A frangible metal bullet (10), a method for making it, and ammunition made therefrom. The frangible metal bullet (10) is formed from a mixture of metal particles and metal or metalloid binder forming material which is compacted into the desired shape, heated to a temperature above that needed to form at least one intermetallic compound but below the temperature of joining of the metal particles by sintering and below the temperature of formation of substantial amounts of ductile alloy of the metal of the particles and the metal or metalloid binder forming material and then cooled. Such bullets (10) have sufficient strength to maintain their integrity during firing but disintegrate into powder on impact and can be formulated to be lead-free.

La présente invention concerne un objet de métal friable, tel qu'un projectile, et un procédé de fabrication de cet objet. L'objet de métal friable est formé d'un mélange de particules de métal et d'un matériau liant à base de métal ou de métalloïde, qui est compacté sous la forme recherchée, chauffé à une température supérieure à celle requise pour former au moins un composé intermétallique, mais inférieure à la température de liaison des particules de métal par frittage et inférieure à la température de formation de quantités substantielles d'un alliage ductile des métaux des particules et du liant métallique ou métalloïdique, puis l'objet est refroidi. Lorsque de tels objets sont mis sous forme de projectiles, ils possèdent, lors du tir, une résistance suffisante au maintien de leur intégrité, mais se désintègrent à l'état de poudre lors de l'impact. Ces articles peuvent être réalisés sans utilisation de plomb.

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