|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||148/536; 148/518; 148/516; 148/527; 102/516|
|발명자 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 6 인용 특허 : 24|
Embodiments of the described method include (a) forming a core comprising a lead alloy, (b) applying copper or a copper alloy to at least a portion of an exterior surface of the core to form a jacketed bullet, (c) heating the jacketed bullet at a pre-selected temperature for a period of time sufficient to simultaneously harden the core and stress-relieve the copper jacket, and, optionally, (d) reworking a selected portion of the heat-treated bullet by mechanical reforming or annealing to lower the hardness of the reworked portion.
1. A method for making a jacketed bullet, comprising: forming a core from a material selected from the group consisting of lead, lead alloys, and mixtures thereof; applying a layer of copper or copper alloy to an external surface of the core to form a copper or copper alloy jacket, the jacket and core forming a bullet; heating the bullet to stress-relieve the jacket and precipitation-harden the core; quenching the bullet; aging the bullet to allow the core to achieve its final hardness; and reworking a nose portion of the aged bullet, thereby dec...