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HIGH ENERGY RATE FORGING DEVELOPMENT.
WESTERN GEAR CORP LYNWOOD CALIF
A manufacturing process has been developed to produce no-draft, close tolerance forgings with difficult web sections and large material upset ratios by high energy rate forging HERF for a wide range of materials. Configurations were a no-draft two legged bracket, a web and rib scissor configuration, a rocket nozzle preform, and a thin webbed circular section. Materials successfully forged into complex shapes were AISI 4340, H-11 tool steel, Ti-6A1-4V, PH 15-7 Mo Stainless Steel, TZM Molybdenum alloy and unalloyed tungsten. Upset forgings of all above materials were produced in order to establish optimum forging parameters. Pilot production lots were run of the thin rim and web configuration using AISI 4340 and H-11 tool steel in order to demonstrate the reproducibility of the HERF process. The mechanical and metallurgical properties of the as-forged parts were determined. Excellent grain flow patterns were achieved in all the configurations employed. The wrought refractory metals were found to be much superior to the arc-cast pressed and sintered material of the same composition. When tensile shear stresses were applied to the material under the optimum forging conditions, the wrought material was vastly superior. However, both materials performed well only under compressive loading. Author
Final technical rept. for Jan 61-Sep 64,
See also AD-608 314.
AF33 600 42523