CPC C21D 9/16 (2013.01) [B23K 3/08 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/0205 (2013.01); C21D 8/0236 (2013.01); C21D 8/0247 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/58 (2013.01); C23C 2/06 (2013.01); F42B 5/28 (2013.01); F42B 5/32 (2013.01); F42B 33/001 (2013.01)] | 7 Claims |
1. A method of processing steel of a rimfire cartridge, the method comprising:
obtaining a steel composition having an original thickness;
performing a first cold rolling of the steel composition;
producing the steel composition having a reduced thickness,
wherein, the reduced thickness constitutes a reduction of about 30% to about 70% of the original thickness;
performing a first annealing and subsequent cooling of the steel composition having the reduced thickness;
performing a second cold rolling of the steel composition having the reduced thickness, following the first annealing and subsequent cooling step;
producing the steel composition having an additional reduced thickness,
wherein, the additional reduced thickness constitutes an additional reduction of about 20% to about 35%;
performing a second annealing and subsequent cooling of the steel composition having the additional reduced thickness; and
continuous plating one or more of:
the steel composition having the reduced thickness, following the first annealing and subsequent cooling step; and
the steel composition having the additional reduced thickness, following the second annealing and subsequent cooling step.
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