초록 ▼

A process and apparatus for forming a thin-walled, elongated member having superior strength properties from an age hardenable copper base alloy is described herein. A slug or billet of a slurry cast, age hardenable copper base alloy is formed into a semi-solid slurry having about 10% to about 30% o

A process and apparatus for forming a thin-walled, elongated member having superior strength properties from an age hardenable copper base alloy is described herein. A slug or billet of a slurry cast, age hardenable copper base alloy is formed into a semi-solid slurry having about 10% to about 30% of the alloy in a liquid phase. The semi-solid slurry is then thixoforged to form the thin-walled, elongated member. Thereafter, the member is age hardened to provide a product having desired strength properties. The process and apparatus of the instant invention may be utilized to form cartridge casings.

대표청구항 ▼

A cartridge casing comprising: an elongated, thin-walled member formed from an age hardenable copper base alloy; said copper base alloy being in a condition wherein it has been forged from a semi-solid slurry and having a tensile strength of at least about 80 ksi, a yield strength of at least about

A cartridge casing comprising: an elongated, thin-walled member formed from an age hardenable copper base alloy; said copper base alloy being in a condition wherein it has been forged from a semi-solid slurry and having a tensile strength of at least about 80 ksi, a yield strength of at least about 65 ksi and a structure comprising a plurality of discrete particles in a solid surrounding metal matrix; said semi-solid slurry comprising said surrounding metal matrix in a molten condition and said discrete particles within said molten matrix.