Lead-free projectiles made by liquid metal infiltration
First Claim
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1. A process for making lead-free projectiles comprising the steps of:
- (1) forming a porous preform from at least one preform metal powder having an average density greater than that of lead;
(2) infiltrating at least one liquid metal into the porous preform;
said infiltrating liquid metal having an average density less than lead and a melting temperature less than one of metals in the preform; and
(3) allowing the liquid infiltration metal to solidify in the pores of the preform metal powder;
wherein the relative amounts of the preform metal and infiltrating metal in the solidified combination will result in a product having a density that is form about 90% to about 110% of the density of lead; and
(4) forming said product into a projectile shape.
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Abstract
A process for making lead-free projectiles such as bullets using liquid metal infiltration to make a projectile having a density similar to lead.
35 Citations
9 Claims
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1. A process for making lead-free projectiles comprising the steps of:
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(1) forming a porous preform from at least one preform metal powder having an average density greater than that of lead; (2) infiltrating at least one liquid metal into the porous preform;
said infiltrating liquid metal having an average density less than lead and a melting temperature less than one of metals in the preform; and(3) allowing the liquid infiltration metal to solidify in the pores of the preform metal powder;
wherein the relative amounts of the preform metal and infiltrating metal in the solidified combination will result in a product having a density that is form about 90% to about 110% of the density of lead; and(4) forming said product into a projectile shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification