Patent classifications
C21D9/16
Steel compositions, methods of manufacture and uses in producing rimfire cartridges
The present invention relates generally to steel compositions, methods of manufacturing the compositions and using the compositions to produce rimfire ammunition cartridges. The steel compositions for use in the rimfire cartridges are processed through cold-rolling and annealing steps to create suitable physical properties.
HIGH-PRESSURE CARTRIDGE CASE
A high pressure cartridge case is fabricated by: providing a wire or rod; cold forming a cartridge case into a drawn blank or a tubular component from sheared lengths of the wire or rod; 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.
HIGH-PRESSURE CARTRIDGE CASE
A high pressure cartridge case is fabricated by: providing a wire or rod; cold forming a cartridge case into a drawn blank or a tubular component from sheared lengths of the wire or rod; 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.
STEEL COMPOSITIONS, METHODS OF MANUFACTURE AND USES IN PRODUCING RIMFIRE CARTRIDGES
The present invention relates generally to steel compositions for rimfire ammunition cartridges, methods of manufacturing the compositions and using the compositions to produce the rimfire ammunition cartridges. The steel compositions for use in the rimfire cartridges are processed through cold-rolling and annealing steps to create suitable physical properties. The steel compositions can be plated for corrosion resistance following formation of the rimfire cartridges.
STEEL COMPOSITIONS, METHODS OF MANUFACTURE AND USES IN PRODUCING RIMFIRE CARTRIDGES
The present invention relates generally to steel compositions for rimfire ammunition cartridges, methods of manufacturing the compositions and using the compositions to produce the rimfire ammunition cartridges. The steel compositions for use in the rimfire cartridges are processed through cold-rolling and annealing steps to create suitable physical properties. The steel compositions can be plated for corrosion resistance following formation of the rimfire cartridges.