High Performance Alloys, Inc. has installed a GFM 412 rotary forge machine for producing bar stock. This machine is capable of producing bar in the hot or cold worked condition. A lot of the work that is done on the machine is processed at room temperature. Hot processing can also be performed, at temperature, or at a specified temperature.
Rotary forging allows for a wide array of mechanical properties. From annealed, precipitation hardened condition, to cold reduced, and the hot worked-as worked conditions.
The GFM rotary forge uses 4 dies to reduce. This design produces more force in the center of the bar than a 2 die or drawing methods.
Dies in the fully open position.
Dies in motion. Rotational speed and feed can be optimized for the type of material processing.
Dies in the fully closed position.
The length of the stroke from open to close is 1 Inch. With new sets of dies, the equipment can take material from 3" Diameter to 0.5" Diameter with 3 die changes. Die changes occur very quickly, using the modular design of shoes, or holders.
3" max. diameter, or a 2-1/8" maximum square bar can be used for starting stock. 36" min length - unless a holding "tang" can be welded on, and later removed. The ability to use small input stock can be utilized to yield the most material possible. We can even accept as extruded bar, and work down to give better grain structure than the extrusion. Cast products have also successfully been reduced on our equipment, as we can closely monitor the progress through the machine.
Materials can be reduced to finish at 1/2" diameter. 12' max. length for material to be annealed at HPA. Longer bars produced can be annealed at other facilities, or left in the high strength condition.
36 foot lengths of high strength bar have been produced, even longer rod lengths are possible.
Our GFM produces 120 Ton of force per die, 900 times per minute. We can reduce hot stainless up to 1/4" per pass. Titanium can be reduced up to 1/2" per pass. The GFM can adjust the dies in and out up to 1", so our 2" die set will forge a 3"Dia to 2"Dia. This working range on the material can be used in the advantage of the production of small to medium lots. While the material is being annealed for further processing, the dies can be changed rapidly.
Cold working material takes the longest time. Heat input into the material can be closely monitored with an optical pyrometer, to assure the working temperature range is kept within limits.
We are specializing in the small production of barstock to support our needs, and the needs of our customers. Quantities less than 2000 Lbs., and we can produce down to a single bar or length of the material and size that our customers require.
Hot Worked or Cold Reduced Bar
GFM Rotary Forged Product (more info)
Use HPAlloys to produce bar when:
HPA is capable of producing cold reduced bars to customer's requirements in less than two weeks with our stock materials, and customer's material conversions are also welcome.