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US 11,826,818 B2Granted
Boron steel high-pressure cartridge case
AssigneeLuvata Ohio, Inc.
InventorBrian Swank
Life of this patent
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Abstract
A boron steel high pressure cartridge case and method of manufacturing the same is provided. The method includes cold forming a cartridge case into a drawn blank or a tubular component; annealing the cartridge case using a belt furnace, flame furnace, induction furnace, or a batch furnace; performing a machine ejector slot and trim on the cartridge case; forming the shoulder and neck of the cartridge case; performing a heat treatment of the cartridge case; and tempering the cartridge case. The cartridge case is fabricated of boron steel including ≤1.0% boron.
Claims20
A method comprising:
- cold forming a cartridge case into a drawn blank or a tubular component, wherein the cartridge case is fabricated of boron steel that is spheroidized annealed at finished size (SAFS) before cold forming;
- annealing the cartridge case using a belt furnace, flame furnace, induction furnace, or a batch furnace;
- performing a machine ejector slot and trim on the cartridge case;
- forming a shoulder and a neck of the cartridge case;
- performing a heat treatment of the cartridge case;
- and
- tempering the cartridge case.
4 more elements
A cartridge case comprising:
- a cartridge body having a tubular shape with an ejector slot, a shoulder, and a neck;
- wherein the cartridge body is comprised of a boron steel comprising ≤1.0% boron, and the boron steel is spheroidized annealed at finished size (SAFS) before being cold formed into the tubular shape.
Dependencies are inferred from the claim text.