Title

Precision Forging Program For Turbine Wheels And Gears

Date

1964

Index Abstract

Not Available

Photo Quality

Complete

Report Number

ML TDR 64-283

Creator

Redlinger, Tobert W.

Timura, James A.

Corporate Author

TRW Inc Cleveland Ohio

Laboratory

Air Force Materials Laboratory

Extent

124

Identifier

AD0607369

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(657)-8791

DoD Project

7930

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Distribution Conflict

No

Abstract

The radial extrusion process has been developed and demonstrated to be feasible as a method for precision forging gears and turbine wheels with integral blades. A state-of-the-art survey indicated a need for an improved forming process to rapidly and economically fabricate the high temperature metals and superalloys into advanced aircraft and aerospace components. The development program initiated to fulfill these objectives included a single station screening phase to develop the process components and a full scale effort to fabricate and evaluate turbine wheels and gears. Results of the screening tests used to evaluate expendable materials for forging die inserts showed a high density alumina product to be most promising. Precision cast steel inserts performed satisfactorily as permanent type inserts. The success of using individual die inserts in a precision forging operation depended on a unique hydraulic closure mechanism which adapted the forging tooling in an 8000-ton mechanical press. The developed process was used to produce high quality turbine wheels with integral blades from several superalloys. Precision tolerances, excellent surface finish, and minimum stock removal were obtained by forging the material into individual die cavities having zero draft on the sides. The process was verified by the satisfactory metallurgical and mechanical properties obtained from the forgings produced during a prototype production run.

Report Availability

Full text available

Date Issued

1964-10

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource