Provided herein is a method of hot gas forming and heat treatment for a Ti.sub.2AlNb-based alloy hollow thin-walled component, which pertains to the technical field of plastic forming manufacture of thin-walled components made from difficult-to-deformation materials, more particularly, a forming method of Ti.sub.2AlNb-based alloy hollow thin-walled components is involved. The purpose of this invention is to solve the existing problems that Ti.sub.2AlNb-based alloy hollow thin-walled components are difficult to form, process steps are complex, and the shape and dimension precision is in contradiction with the control of the microstructure and properties. The method comprises the following steps: (1) hot gas forming to obtain hot gas formed tube components, and (2) controllalbe-cooling heat treatment to obtain Ti.sub.2AlNb-based alloy hollow thin-walled components. The advantages of this invention are as following: improving production efficiency, high dimensional accuracy, reducing energy consumption, achieveing the integration of shape and performance control, and excellent mechanical properties. The invention also relates to Ti.sub.2AlNb-based alloy hollow thin-walled components manufactured by a hot gas forming and heat treatment method.

Provided herein is a method of hot gas forming and heat treatment for a Ti.sub.2AlNb-based alloy hollow thin-walled component, which pertains to the technical field of plastic forming manufacture of thin-walled components made from difficult-to-deformation materials, more particularly, a forming method of Ti.sub.2AlNb-based alloy hollow thin-walled components is involved. The purpose of this invention is to solve the existing problems that Ti.sub.2AlNb-based alloy hollow thin-walled components are difficult to form, process steps are complex, and the shape and dimension precision is in contradiction with the control of the microstructure and properties. The method comprises the following steps: (1) hot gas forming to obtain hot gas formed tube components, and (2) controllalbe-cooling heat treatment to obtain Ti.sub.2AlNb-based alloy hollow thin-walled components. The advantages of this invention are as following: improving production efficiency, high dimensional accuracy, reducing energy consumption, achieveing the integration of shape and performance control, and excellent mechanical properties. The invention also relates to Ti.sub.2AlNb-based alloy hollow thin-walled components manufactured by a hot gas forming and heat treatment method.

A method and tooling for forming a cartridge case blank comprising backward extruding a tube from a length of wire stock in multiple backward extrusion steps with progressive tooling to obtain an intermediate blank that can be finish drawn without a preceding annealing step and which if otherwise not subjected to multiple backward extrusion steps, would require annealing prior to finish drawing to avoid tearing.

A method and tooling for forming a cartridge case blank comprising backward extruding a tube from a length of wire stock in multiple backward extrusion steps with progressive tooling to obtain an intermediate blank that can be finish drawn without a preceding annealing step and which if otherwise not subjected to multiple backward extrusion steps, would require annealing prior to finish drawing to avoid tearing.

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; tempering the cartridge case; and coating the cartridge case with a zinc nickel plating. The cartridge case is fabricated of boron steel including 1.0% boron.

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; tempering the cartridge case; and coating the cartridge case with a zinc nickel plating. The cartridge case is fabricated of boron steel including 1.0% boron.

A method and tooling for forming a cartridge case blank comprising backward extruding a tube from a length of wire stock in multiple backward extrusion steps with progressive tooling to obtain an intermediate blank that can be finish drawn without a preceding annealing step and which if otherwise not subjected to multiple backward extrusion steps, would require annealing prior to finish drawing to avoid tearing.

A method and tooling for forming a cartridge case blank comprising backward extruding a tube from a length of wire stock in multiple backward extrusion steps with progressive tooling to obtain an intermediate blank that can be finish drawn without a preceding annealing step and which if otherwise not subjected to multiple backward extrusion steps, would require annealing prior to finish drawing to avoid tearing.

A neck sizing die for shoulder breeching ammunition cartridge cases that uses the shoulder to align the case, not the body. Alignment occurs before resizing. Resizing is done in a two-step process: a bushing is used to shrink the neck diameter and then an expansion button is used to increase it. Bushing and button diameters are highly selectable and easily changed. Cone-and-cup interfaces ensure concentricity of the case shoulder to the bushing or button. The unique alignment technique and two-step sizing method produces a case with a neck having an interior diameter of the user's choice with the interior wall of the neck aligned to the shoulder. This results in a case that will more reliably position the bullet concentric with the bore of the barrel than existing tools and methods.

A tube with a conical mouth slides over the neck of an ammunition cartridge and is pressed against the shoulder to align the case. A neck reamer translates and rotates within the tube, the tip being inserted into the neck. Both mouth and tip are replaceable, come in different sizes, and come with smooth or abrading surfaces. The tip and the mouth are coaxial. The mouth perfects the shoulder surface and the tip perfects the neck interior. This results in a cartridge case having a neck with an interior wall that is a perfect cylinder that is coaxial with the perfected exterior of the conical shoulder.